Thrift Savings Plan (TSP): Retirement Savings for Service Members

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The Thrift Savings Plan (TSP) is a cornerstone of retirement planning for U.S. federal employees and members of the uniformed services.

Functioning similarly to private-sector 401(k) plans, the TSP is a defined contribution retirement savings and investment program designed to provide a supplemental source of income in retirement.

For service members, particularly those under the Blended Retirement System (BRS), the TSP represents a significant component of their overall retirement package, complementing military retired pay. Understanding how the TSP works is crucial for service members planning for their financial future. The official TSP website is located at tsp.gov.

TSP Eligibility for Service Members

Eligibility to participate in the Thrift Savings Plan extends broadly across the U.S. government workforce, including members of the uniformed services. Specifically, members of the Army, Navy, Air Force, Marine Corps, Coast Guard, Public Health Service, and the National Oceanic and Atmospheric Administration Commissioned Officer Corps, whether on active duty or in the Ready Reserve (including the National Guard), are generally eligible to contribute.

To be eligible, an individual must be actively employed by the federal government in one of these capacities, be in a pay status allowing for contributions, and work either full-time or part-time.

The process for establishing a TSP account differs significantly depending on whether a service member falls under the newer Blended Retirement System (BRS) or the legacy retirement system (often referred to as non-BRS).

Blended Retirement System (BRS) Members

Service members who began their service on or after January 1, 2018, are automatically enrolled in the BRS. Under BRS, automatic enrollment in the TSP begins after the member has completed 60 days of service. At that point, the member’s service automatically deducts 5% of their basic pay each pay period and deposits it into the Traditional balance of their TSP account.

This automatic enrollment feature is a significant mechanism designed to boost retirement savings participation among newer recruits. While the 5% default contribution rate conveniently triggers the maximum available government matching funds (discussed later), service members should recognize that this default rate might not, on its own, be sufficient to meet ambitious long-term retirement income goals. Financial planning often suggests saving significantly more, potentially 15% or higher, meaning members should consider proactively increasing their contribution percentage beyond the default as their income and financial capacity grow.

BRS members can change or stop these automatic contributions at any time using their service’s payroll system. If they stop contributions, they may be subject to automatic re-enrollment (at 5%) the following January unless they opt out again.

Active duty members with fewer than 12 years of service (or Reservists/Guard members with fewer than 4,320 points) as of December 31, 2017, had a one-time option to opt into BRS during 2018.

Non-BRS Members (Legacy System)

Service members not covered by BRS (typically those who entered service before 2018 and chose not to opt-in) are not automatically enrolled in the TSP. To participate, these members must take proactive steps to start contributing.

Enrollment is typically initiated through their service’s electronic payroll system, such as myPay for most branches, or Direct Access for the Coast Guard and NOAA Corps. Alternatively, they can complete and submit Form TSP-U-1, Election Form, to their service finance office.

The necessity for non-BRS members to actively elect participation underscores the importance of understanding which retirement system applies to them; failure to take action means missing out entirely on TSP savings opportunities and potential tax benefits.

Reentering Service

The enrollment process upon returning to service also depends on BRS status:

• BRS members who previously served at least 60 days are automatically re-enrolled upon reentry, typically at the 5% contribution rate.
• Non-BRS members who had fewer than 12 years of service (or <4,320 points for Reserve/Guard) when they separated may be given an opportunity by their service to opt into BRS upon reentry.
• Other non-BRS members reentering service are not automatically enrolled but can elect to start or resume TSP contributions using their payroll system or Form TSP-U-1.

Contributions Explained

Contributing to the TSP involves several key decisions regarding contribution types, sources, and limits, as well as understanding the government contributions available under BRS.

Traditional vs. Roth

Service members have a choice regarding the tax treatment of their own contributions to the TSP. They can elect to contribute to a Traditional TSP balance, a Roth TSP balance, or allocate contributions between both. This choice fundamentally determines when income taxes are paid on contributions and earnings.

Traditional TSP

Contributions are made on a pre-tax basis. This means the contributed amount is deducted from pay before federal (and usually state) income taxes are calculated, effectively lowering current taxable income and potentially reducing the current year’s tax bill. Investment earnings grow tax-deferred. However, taxes are due on both the contributions and the accumulated earnings when funds are withdrawn in retirement, at the tax rates applicable in the year of withdrawal.

Roth TSP

Contributions are made on an after-tax basis. The contributed amount is deducted from pay after income taxes have already been withheld. The primary advantage is that qualified withdrawals in retirement—including both the contributions and all accumulated earnings—are completely tax-free.

To be considered qualified, Roth earnings must meet two IRS conditions: (1) at least five years must have passed since January 1st of the calendar year in which the member made their first Roth contribution, AND (2) the member must be at least age 59½, permanently disabled, or deceased. Another benefit is that Roth TSP balances are not subject to Required Minimum Distributions (RMDs) during the participant’s lifetime.

Table 1: Traditional vs. Roth TSP Contributions

A critical point often overlooked is that all government contributions—both the Automatic (1%) and any Matching contributions under BRS—are deposited into the member’s Traditional TSP balance, regardless of whether the member chooses to make their own contributions to the Roth TSP. This means even service members who exclusively contribute to Roth TSP will inevitably build a Traditional TSP balance over time. This mixed balance has implications for withdrawal strategies in retirement, as RMDs will apply to the Traditional portion, and withdrawals from that portion will be taxable, slightly complicating the straightforward “Roth is tax-free” picture.

Both Traditional and Roth contributions are subject to payroll taxes (Social Security and Medicare, FICA at 7.65%).

Contribution Sources and Limits

Service members can elect to contribute a percentage of their basic pay, as well as percentages of any incentive pay, special pay, or bonus pay they receive. However, a contribution from basic pay must be elected to be eligible to contribute from these other pay categories.

The Internal Revenue Service (IRS) sets annual limits on how much can be contributed to plans like the TSP. These limits are subject to change each year. For 2025, the key limits are:

Elective Deferral Limit (IRC § 402(g))

This is the maximum amount a participant can contribute from their taxable pay across all their traditional and Roth TSP/401(k)-type accounts combined. For 2025, this limit is $23,500. (Note: Traditional contributions made from tax-exempt combat zone pay do not count toward this limit).

Catch-Up Contribution Limit (IRC § 414(v))

Participants who are age 50 or older (or turning 50 during the calendar year) can contribute additional amounts above the elective deferral limit.

• The standard catch-up limit for those aged 50-59 and 64+ in 2025 is $7,500. This allows a total contribution of up to $31,000 ($23,500 + $7,500).
• Due to the SECURE 2.0 Act, there is a higher catch-up limit for participants turning ages 60, 61, 62, or 63 in 2025. For this group, the catch-up limit is $11,250. This allows a total contribution of up to $34,750 ($23,500 + $11,250).
• Catch-up contributions cannot be made from incentive pay, special pay, or bonus pay.

Annual Additions Limit (IRC § 415(c))

This is the overall cap on the total amount of contributions that can be added to a participant’s account from all sources (employee contributions – traditional, Roth, and tax-exempt – plus all agency/service automatic and matching contributions) within a calendar year, per employer. For 2025, this limit is $70,000. Catch-up contributions made by the employee do not count against this limit. This limit primarily affects high earners or those making substantial tax-exempt contributions during deployment.

The TSP uses a “spillover” method for catch-up contributions. Eligible participants (age 50+) do not need to make a separate catch-up election. Once their regular contributions exceed the Elective Deferral Limit (or the Annual Additions Limit, if applicable), any further contributions automatically start counting towards the applicable catch-up limit until that limit is reached.

Blended Retirement System (BRS) Government Contributions

A key feature of the BRS is the government contribution component, designed to ensure more service members leave the military with some retirement savings. Non-BRS members do not receive these government contributions.

Agency/Service Automatic (1%) Contribution

BRS members automatically receive a contribution from their service equal to 1% of their basic pay each pay period. This starts after completing 60 days of service. Importantly, the member does not need to contribute any of their own money to receive this 1%. This contribution goes into the member’s Traditional TSP balance. However, this 1% contribution is subject to a vesting period (see below).

Agency/Service Matching Contributions

The government also matches a portion of the BRS member’s own contributions.

• The match applies to the first 5% of basic pay contributed by the member each pay period.
• The match is structured as: 100% (dollar-for-dollar) on the first 3% of basic pay contributed, plus 50% (fifty cents on the dollar) on the next 2% of basic pay contributed.
• This means to receive the maximum possible match, a member must contribute at least 5% of their basic pay. Doing so yields a 4% match from the government (3% from the first tier + 1% from the second tier).
• When combined with the Automatic 1% Contribution, a member contributing 5% receives a total government contribution of 5% (1% automatic + 4% match).
• Matching contributions begin after the member completes two years of service (for those entering on/after Jan 1, 2018). Members who opted into BRS may start receiving matching contributions sooner, typically from their opt-in date.
• Matching contributions stop if the member stops making their own contributions.
• Like the automatic 1%, matching contributions are deposited into the member’s Traditional TSP balance.
• Matching contributions can apply to contributions spilling over into the catch-up limit, up to the first 5% of salary contributed, unless the Annual Additions limit is reached.

It is important for BRS members aiming to maximize their TSP contributions and receive the full government match throughout the year to plan their contributions carefully. Because matching is calculated per pay period based on that period’s contribution, hitting the annual Elective Deferral Limit ($23,500 in 2025) before the final pay period of the year will cause employee contributions to cease. Consequently, matching contributions will also stop for the remainder of the year, even if the member contributed 5% or more earlier. To avoid losing potential matching funds, members should ideally contribute at least 5% of their basic pay each pay period, potentially by calculating and setting a consistent percentage for the year rather than contributing a large fixed dollar amount early on.

Table 2: BRS Government TSP Contributions Summary

Vesting Rules (BRS Specific)

Vesting refers to ownership. While service members always own 100% of their own contributions and the earnings on them, specific rules apply to the government contributions under BRS.

• Employee Contributions: 100% vested immediately.
• Agency/Service Matching Contributions: 100% vested immediately.
• Agency/Service Automatic (1%) Contributions: Require two years of military service to become vested. This vesting requirement means that service members separating before completing two years of service will forfeit the 1% automatic contributions they received, along with any earnings generated by those contributions. This is a crucial factor for new recruits considering separation within their first two years, as it impacts the net financial benefit received from BRS during that initial period. Federal civilian service time does not count towards vesting in a uniformed services TSP account, and vice versa.

TSP Fund Options

The TSP offers participants several ways to invest their retirement savings, catering to different levels of investment knowledge and risk tolerance. The primary options are the individual core funds and the Lifecycle (L) Funds. A Mutual Fund Window provides access to external funds for eligible participants.

Individual Funds (G, F, C, S, I)

Participants can construct their own investment portfolio by allocating their contributions among five core individual funds.

G Fund (Government Securities Investment Fund)

Strategy: Invests exclusively in unique, non-marketable short-term U.S. Treasury securities specifically issued to the TSP. Its objective is to preserve capital while generating returns slightly above those of short-term U.S. Treasury bills, achieved by earning a calculated long-term Treasury rate.

Risk: Considered the lowest-risk TSP fund. Principal and interest payments are guaranteed by the U.S. government, eliminating credit risk. The fund’s value does not fluctuate; only the interest rate changes. The primary risk is inflation risk – the possibility that returns may not keep pace with inflation, eroding purchasing power over time.

Composition: 100% special non-marketable U.S. Treasury securities.

F Fund (Fixed Income Index Investment Fund)

Strategy: Aims to track the performance of the Bloomberg U.S. Aggregate Bond Index, a broad benchmark representing the U.S. investment-grade bond market. It holds a diverse mix of U.S. government, corporate, and mortgage-backed bonds.

Risk: Low to moderate risk. Offers potentially higher returns than the G Fund but carries the risk of principal loss. Subject to interest rate risk (bond prices generally fall when rates rise), credit risk (issuers might default), inflation risk, and prepayment risk (bonds being paid off early if rates fall).

Composition (as of 12/31/2024): Primarily U.S. Government/Government-Related (approx. 48%), Securitized (approx. 27%), and Credit (Corporate) bonds (approx. 24%).

C Fund (Common Stock Index Investment Fund)

Strategy: Designed to mirror the performance of the Standard & Poor’s 500 (S&P 500) Index, which includes stocks of 500 of the largest U.S. companies.

Risk: Moderate to high risk. Subject to market risk – the value of stocks can fluctuate significantly based on economic and market conditions. Also subject to inflation risk. Offers potential for substantial long-term growth but also carries the risk of significant short-term losses.

Composition (as of 12/31/2024): Diversified across large-cap U.S. stocks, with major sectors including Information Technology (approx. 33%), Financials (approx. 14%), and Consumer Discretionary (approx. 11%).

S Fund (Small Cap Stock Index Investment Fund)

Strategy: Seeks to match the performance of the Dow Jones U.S. Completion Total Stock Market Index. This index includes U.S. stocks not found in the S&P 500, primarily focusing on small- and medium-sized companies.

Risk: High risk. Subject to market risk and inflation risk. Historically, small-cap stocks have offered higher growth potential than large-cap stocks but also exhibit greater volatility and potential for loss.

Composition (as of 12/31/2024): Diversified across small-to-mid-cap U.S. stocks, with major sectors including Information Technology (approx. 18%), Financials (approx. 18%), and Industrials (approx. 18%).

I Fund (International Stock Index Investment Fund)

Strategy: Aims to track the performance of the MSCI ACWI IMI ex USA ex China ex Hong Kong Index (this benchmark was adopted in 2024, significantly expanding the fund’s scope from the previous MSCI EAFE index). It invests in stocks of companies of all sizes across more than 40 developed and emerging markets outside the United States, China, and Hong Kong, providing broad international diversification.

Risk: High risk. Subject to market risk, inflation risk, and currency risk (changes in the value of the U.S. dollar relative to foreign currencies can impact returns, positively or negatively). The inclusion of emerging markets and small-cap stocks under the new benchmark potentially increases volatility compared to the previous index, though it also enhances diversification.

Composition (as of 12/31/2024): Stocks from numerous countries, with the largest allocations typically in Japan, the United Kingdom, Canada, France, India, Switzerland, and Taiwan.

Table 3: TSP Individual Fund Summary

Lifecycle (L) Funds

For participants seeking a simpler, professionally managed approach, the TSP offers Lifecycle (L) Funds.

Concept: L Funds are target-date funds. Participants choose the L Fund with the target date closest to the year they expect to begin withdrawing money from their TSP account.

Strategy: Each L Fund holds a diversified mix of all five individual TSP funds (G, F, C, S, I). The fund’s allocation strategy follows a “glide path,” automatically becoming more conservative over time. Far from the target date, the L Fund holds a higher percentage of stocks (C, S, I Funds) for greater growth potential. As the target date approaches, the allocation gradually shifts towards more conservative investments (G and F Funds) to reduce risk and preserve capital.

These adjustments happen automatically each quarter, and the funds are rebalanced daily to maintain their target allocations. This “set it and forget it” structure simplifies investing, particularly for those uncertain about making their own allocation decisions, although it sacrifices the customization possible with individual funds. L Funds are the default investment for new BRS members who do not make their own investment election.

Risk: The risk level is designed to be appropriate for the fund’s time horizon, starting higher and decreasing as the target date nears.

Available Funds: L Income (for those currently withdrawing), L 2025, L 2030, L 2035, L 2040, L 2045, L 2050, L 2055, L 2060, L 2065, and L 2070. When an L Fund reaches its target date, it merges into the L Income Fund.

Mutual Fund Window (MFW)

The TSP also offers a Mutual Fund Window (MFW), allowing participants who meet certain eligibility requirements (e.g., minimum account balance) to invest a portion of their account in a selection of vetted, external mutual funds. This option provides greater investment choice beyond the core TSP funds but comes with additional administrative and fund-specific fees.

Fund Performance and Expenses

Detailed information on the historical performance, rates of return, and expense ratios for all TSP funds is available on the TSP website under the Fund Performance section and on the specific pages for each individual fund (e.g., G Fund).

A significant advantage of the TSP is its extremely low administrative and investment expenses compared to typical private-sector plans. These low fees mean more of the participant’s money remains invested and compounds over time, substantially boosting long-term retirement savings potential.

Managing Your TSP Account

Actively managing a TSP account involves accessing account information, adjusting contributions, changing investment strategies, and keeping beneficiary information current.

Accessing Your Account

Participants have several ways to access and manage their TSP accounts:

My Account Portal

The primary method is the secure “My Account” portal on the official TSP website: tsp.gov. Access requires a username, password, and the use of multifactor authentication for enhanced security. Participants who had logins prior to June 1, 2022, must complete a one-time process to set up new credentials for the updated system. The portal allows users to view balances, track fund performance, request transactions, update contact information, and manage beneficiaries.

TSP Mobile App

An official TSP Mobile App is available from the Apple App Store and Google Play Store, offering convenient access to most My Account features, including balance checks, transaction requests, investment changes, and document submissions. It requires the same My Account login credentials and supports biometric login (fingerprint/facial recognition) on compatible devices.

ThriftLine

Participants can access account information and perform certain transactions via the automated ThriftLine phone service at 1-877-968-3778. Access requires the 6-digit ThriftLine PIN established during My Account setup. Live ThriftLine Representatives are also available during business hours.

Changing Contribution Amounts

Adjusting the amount contributed from pay is handled outside the TSP My Account portal, through the service member’s specific payroll system.

How: Most service members use their designated electronic payroll interface, such as myPay for Army, Navy, Air Force, and Marine Corps, or Direct Access for Coast Guard and NOAA Corps. Alternatively, Form TSP-U-1, Election Form, can be completed and submitted to the member’s finance/payroll office.

When: Contribution elections (to start, stop, or change the percentage/amount) can be made at any time. Changes typically become effective in the next pay period following submission.

This distinction between using service payroll systems for contribution changes and the TSP portal for investment/beneficiary management is important; members need to know the correct channel for each action.

Changing Investment Allocations

Modifying how TSP funds are invested (both future contributions and existing balances) is done directly through the TSP system, either via the My Account portal online or the ThriftLine.

Investment Election (Future Funds)

This directs how new money entering the account (contributions, loan payments, rollovers) will be allocated among the G, F, C, S, I, and L funds. It does not change the investment mix of money already in the account. An investment election remains in effect until a new one is submitted and generally becomes effective the next business day. There is no limit on how often investment elections can be changed.

If no election is made, contributions default to an age-appropriate L Fund (for BRS members enrolled after 1/1/2018) or the G Fund (for non-BRS or earlier BRS members without an election).

Reallocation (Existing Balance – Percentage)

This transaction moves the entire existing account balance by specifying the new percentage desired in each TSP fund. It affects both Traditional and Roth balances proportionally.

Fund Transfer (Existing Balance – Specific)

This newer option allows moving a specific dollar amount or percentage from one or more funds to one or more other funds, without affecting the allocation of the rest of the account. Like reallocations, it moves proportional amounts of Traditional and Roth money within the specified transfer amount. Fund transfers are also the mechanism for moving money into or out of the Mutual Fund Window.

Processing and Limits

Reallocations and Fund Transfers submitted before noon Eastern Time on a business day are generally processed that same day; requests made at or after noon are processed the following business day.

There’s a limit on these transactions: only the first two reallocations or fund transfers made in any calendar month can move money into any TSP fund (G, F, C, S, I, L). Any subsequent reallocation or fund transfer requests within that same calendar month can only move money into the G Fund.

This rule encourages a long-term investment perspective rather than frequent trading, while still permitting periodic adjustments and providing a “safe harbor” move to the G Fund if needed mid-month. These limits apply separately to civilian and uniformed service accounts if a participant holds both.

Updating Beneficiary Information

Keeping beneficiary designations current is critically important for ensuring TSP assets are distributed according to the participant’s wishes after death.

Importance

The TSP beneficiary designation on file at the time of death overrides any other documents, including wills, prenuptial agreements, divorce decrees, or court orders. Failure to update designations after life events like marriage, divorce, or the birth of a child can lead to unintended distributions (e.g., to an ex-spouse). Regular review (annually or after life events) is strongly recommended.

How to Update

Beneficiaries can be designated or updated easily online through the My Account portal. The process requires the beneficiary’s full name, date of birth, Social Security number, and address. Participants can designate up to 20 beneficiaries, including individuals, a trust, an estate, or an organization (like a charity or foundation). Designations can be primary or contingent.

Statutory Order of Precedence

If no valid beneficiary designation is on file with the TSP at the time of death, the account balance will be distributed according to a strict legal order of precedence:

1. To the surviving spouse.
2. If no spouse, to the child or children equally (with the share of any deceased child going to their descendants). “Child” includes biological and legally adopted children, but not unadopted stepchildren.
3. If no children/descendants, to the parent(s) equally or the surviving parent. “Parent” does not include unadopted stepparents.
4. If no parents, to the appointed executor or administrator of the estate.
5. If none of the above, to the next of kin as determined by the laws of the state where the participant resided at death.

Once a beneficiary is designated, the order of precedence no longer applies unless the designation is formally canceled or all named beneficiaries predecease the participant without contingent beneficiaries named.

In-Service Access to TSP Funds

While the primary purpose of the TSP is long-term retirement savings, provisions exist for accessing funds while still actively serving, primarily through loans and, under specific circumstances, in-service withdrawals. Accessing funds early permanently reduces retirement savings and potential growth, so these options should be approached with caution.

TSP Loans

Participants can borrow from their own TSP contributions and associated earnings. Agency/Service contributions cannot be borrowed.

Eligibility

Must be actively employed (uniformed service or civilian) and in a pay status. Must have at least $1,000 in own contributions and earnings. Cannot have fully repaid another TSP loan within the previous 30 business days. Loans are generally not available if in nonpay status.

Loan Types

General Purpose Loan: Can be used for any purpose. Repayment term is 1 to 5 years (12-60 months). No documentation of fund use is required. A $50 processing fee applies.

Primary Residence Loan: Must be used for the purchase or construction of a primary residence (costs needed to close). Requires documentation. Repayment term is longer, from 5 to 15 years (61-180 months). A $100 processing fee applies. Only one primary residence loan can be outstanding at a time, though a participant can have two loans total (either two general purpose, or one general purpose and one primary residence).

Loan Amounts

The minimum loan amount is $1,000. The maximum loan amount is the lesser of: (1) the participant’s own contributions and earnings; (2) 50% of the participant’s vested account balance (or $10,000, whichever is greater), minus any outstanding loan balance; or (3) $50,000 minus the highest outstanding loan balance over the preceding 12 months.

Repayment

Loans are repaid through automatic payroll deductions. Payments include both principal and interest, with the interest paid back into the participant’s own TSP account. Payments typically begin within 60 days of loan disbursement. The payment amount is fixed for the life of the loan unless specific circumstances arise (e.g., change in pay schedule, nonpay status).

Loans During Nonpay Status

If a participant enters an approved nonpay status (e.g., military leave without pay, extended deployment, furlough expected to last over 30 days), loan payments can be suspended for up to one year (or longer for periods of military service) if the TSP is properly notified, typically via Form TSP-41 submitted by the agency/service. Interest continues to accrue during the suspension period.

Upon return to pay status (or after one year, whichever is first, except for military LWOP), payments must resume. The loan may be reamortized, potentially resulting in higher payments to ensure repayment within the original maximum term. Failure to provide proper documentation or resume payments can lead to default. This complexity requires diligent management by the service member during nonpay periods.

Separation with an Outstanding Loan

If a member separates from service with a loan, they have options: continue making payments directly (via direct debit, check, or money order), pay the loan off in full by the deadline, or allow the loan to be foreclosed. Foreclosure treats the outstanding balance as a taxable distribution.

Loan Default

Failure to make timely payments can result in the loan being declared delinquent and potentially becoming a “taxed loan” for active employees or a “foreclosed loan” for separated participants. In either case, the outstanding loan balance plus accrued interest is reported to the IRS as taxable income for that year. This amount may also be subject to a 10% early withdrawal penalty tax if the participant is under age 59½. A taxed loan permanently reduces the account balance unless repaid (which is generally not possible for foreclosed loans) and negatively impacts future loan eligibility.

In-Service Withdrawals

These withdrawals permanently remove funds from the TSP account and cannot be repaid. They reduce the account balance available for retirement and eliminate any future earnings on the withdrawn amount.

Types of In-Service Withdrawals

Financial Hardship Withdrawal: Available only if the participant is experiencing a documented financial hardship based on specific criteria: recurring negative monthly cash flow, unpaid medical expenses (including necessary household improvements), unpaid personal casualty losses, unpaid legal expenses for separation or divorce, or losses from a FEMA-declared major disaster.

• Rules: Minimum withdrawal is $1,000. Only the participant’s own contributions and their earnings can be withdrawn.
• Consequences: The taxable portion of the withdrawal is subject to federal (and potentially state) income tax in the year received. If the participant is under age 59½, a 10% early withdrawal penalty tax generally applies to the taxable amount. (Withdrawals of tax-exempt contributions or Roth contributions/qualified earnings are not taxed or penalized). Spousal consent (notarized signature) is required for FERS/BRS participants; spousal notification is required for CSRS participants.

Age-59 ½ Withdrawal: Available to participants who are age 59½ or older and still actively employed.

• Rules: Must be age 59½ or older. Only vested funds can be withdrawn. Minimum withdrawal is $1,000 (or the entire vested balance if less). Participants can take up to four age-59 ½ withdrawals per calendar year.
• Consequences: The taxable portion of the withdrawal is subject to mandatory 20% federal income tax withholding unless the funds are directly rolled over to a traditional IRA or another eligible employer plan. Because the participant is over age 59½, the 10% early withdrawal penalty tax does not apply. Spousal consent/notification rules apply based on retirement system (FERS/BRS vs. CSRS). The ability to roll over these funds is key to avoiding immediate taxation for those not needing the cash right away.

Table 4: TSP Loan vs. In-Service Withdrawal Comparison

Given the permanent impact on retirement savings and potential tax consequences, in-service withdrawals, particularly hardship withdrawals, are generally considered less favorable than TSP loans if the participant has the capacity to repay a loan. Loans preserve the long-term account balance, while withdrawals permanently reduce it.

Relevant TSP publications include the TSP Loans booklet (TSP BK04), Effect of Nonpay Status on Your TSP Account fact sheet (TSP FS04), In-Service Withdrawals booklet (TSP BK12), and Tax Rules about TSP Payments booklet (TSP BK26). Information is also available online at TSP Loans and In-Service Withdrawal Basics.

TSP Considerations During Deployment (Combat Zone)

Deployments to designated combat zones introduce unique rules and opportunities related to TSP contributions, primarily concerning pay that is exempt from federal income tax.

Contributing Tax-Exempt Pay

Pay earned by service members while serving in a designated combat zone is typically excluded from federal income tax. Members can contribute this tax-exempt pay directly to their TSP accounts. Contributions cannot be made from allowances like housing or subsistence.

Impact on Annual Contribution Limits

The tax-exempt nature of combat zone pay significantly affects how contributions count toward annual IRS limits:

Traditional TSP Contributions: When tax-exempt pay is contributed to the Traditional TSP balance, these contributions do not count against the annual Elective Deferral Limit ($23,500 for 2025). This creates a substantial opportunity for deployed members to save aggressively. They can contribute their tax-exempt pay to the Traditional TSP well beyond the standard $23,500 limit, up until they reach the overall Annual Additions Limit ($70,000 for 2025, which includes employee and government contributions).

Roth TSP Contributions: Conversely, when tax-exempt pay is contributed to the Roth TSP balance, these contributions do count toward the annual Elective Deferral Limit ($23,500 for 2025).

Tax Treatment of Combat Zone Contributions Upon Withdrawal

The tax treatment upon withdrawal depends on where the tax-exempt contributions were directed:

Traditional Tax-Exempt Contributions: The contributions themselves remain tax-free when withdrawn from the Traditional TSP balance in retirement. However, any investment earnings generated by these contributions will be taxed as ordinary income upon withdrawal.

Roth Tax-Exempt Contributions: This offers a unique “double tax advantage.” The contributions go in tax-free (due to the combat zone exclusion), and if the withdrawal meets the qualifications for Roth earnings (5-year rule and age 59½/disability/death), both the contributions and the earnings come out completely tax-free. This makes Roth contributions particularly attractive for tax-exempt combat zone pay.

Catch-Up Contributions from Tax-Exempt Pay

For participants age 50 or older making catch-up contributions while receiving tax-exempt pay, there’s a specific rule: these catch-up contributions must be designated as Roth contributions. The TSP cannot accept Traditional tax-exempt contributions toward the catch-up limit. While this adds a layer of complexity, it aligns with maximizing the potential tax-free treatment available for funds earned in a combat zone.

Strategic Planning

Deployed members receiving tax-exempt pay have a significant opportunity to boost their retirement savings. By understanding these rules, they can potentially contribute up to the Annual Additions Limit ($70,000 in 2025) by first maximizing Roth contributions up to the Elective Deferral Limit (if desired, to gain the double tax advantage) and then contributing additional tax-exempt pay to the Traditional TSP balance. Those eligible for catch-up contributions can add further Roth contributions on top of this.

Additional Resources

While managing TSP contributions during deployment, service members can find general financial readiness support through Military OneSource. Specific TSP information regarding combat zone contributions can be found in the instructions for Form TSP-U-1 and on the TSP website’s pages for contribution limits and contribution types.

It’s also worth noting that deployed members may be eligible for the Savings Deposit Program (SDP), a separate high-yield savings vehicle offered by the Department of Defense, which provides another avenue for savings during deployment but is distinct from the TSP.

TSP After Military Service: Separation and Retirement

Upon separating or retiring from military service, members have several options regarding their TSP accounts. Understanding these options, along with withdrawal rules and tax implications, is crucial for managing retirement income.

Keeping Your TSP Account

Service members are generally permitted to keep their TSP accounts active after leaving the military, as long as the vested account balance is $200 or more. Many choose to do so to continue benefiting from the TSP’s notably low administrative and investment fund expenses and the familiar investment options. Account management continues to be available through the My Account portal and TSP Mobile App. However, no further contributions can be made to the account from payroll after separation.

Moving Money (Rollovers)

Flexibility exists for moving funds into or out of the TSP after separation:

Rolling Funds Out of TSP: Participants can transfer their vested TSP account balance to other eligible retirement plans. Common destinations include:

• Traditional Individual Retirement Arrangement (IRA)
• Roth IRA (Note: Rolling pre-tax Traditional TSP funds into a Roth IRA is a taxable event in the year of the rollover)
• An eligible employer-sponsored plan at a new job (e.g., 401(k), 403(b)).

Participants should be aware that once funds are rolled over, they become subject to the rules, investment options, and fees of the new plan or IRA. While an IRA might offer a wider array of investment choices, it may come with higher expenses than the TSP.

Rolling Funds Into TSP: Even after separation, participants can consolidate other retirement savings by rolling eligible funds from traditional IRAs or previous employer plans (like 401(k)s) into their existing TSP account. This can simplify managing retirement assets. The TSP website provides details on eligible plan types and the process at Move Money Into TSP.

Taking Distributions (Withdrawals After Separation)

The TSP offers considerable flexibility in how separated participants can access their funds. When requesting a withdrawal, participants with both Traditional and Roth balances can typically specify whether the funds should come solely from the Traditional balance, solely from the Roth balance, or proportionally (pro rata) from both.

Available distribution options include:

Partial Distribution: A one-time withdrawal of a specific dollar amount (minimum $1,000).

Total Distribution: A withdrawal of the entire account balance in a single payment.

Installment Payments: Receiving regular, scheduled payments from the account.

• Frequency: Payments can be set up monthly, quarterly, or annually.
• Amount: Participants can choose a specific fixed dollar amount for each payment (minimum $25) or have the TSP calculate the payment based on IRS life expectancy tables. Life expectancy payments are recalculated each January based on the participant’s age and prior year-end account balance.
• Flexibility: Installment payments can be started, stopped, or modified (amount or frequency) at any time via My Account or the ThriftLine.

Life Annuity Purchase: Using some or all of the account balance to purchase a life annuity contract from TSP’s designated provider. An annuity provides guaranteed payments for the life of the participant (and potentially a survivor, depending on the option chosen). Various options exist, such as single life or joint life, with features like survivor benefits or cash refunds.

The variety of withdrawal options allows retirees to tailor distributions to their income needs, tax situations, and longevity expectations, but requires careful consideration of the implications of each choice.

Tax Implications of Withdrawals

Withdrawals from the Traditional TSP balance (including earnings and any government contributions) are generally taxed as ordinary income in the year received. Qualified distributions from the Roth TSP balance (contributions and earnings) are tax-free. Any tax-exempt contributions withdrawn remain tax-exempt. State income taxes may also apply.

A 10% early withdrawal penalty tax may apply to taxable amounts withdrawn before age 59½, unless an exception is met. A key exception exists for payments made to participants after separation from service if the separation occurred during or after the calendar year the participant reached age 55. Other exceptions also exist; consulting TSP tax publications or a tax advisor is recommended.

Required Minimum Distributions (RMDs)

The IRS mandates that individuals begin taking withdrawals from tax-deferred retirement accounts, including the Traditional TSP, after reaching a certain age and separating from service.

RMD Age: As mandated by the SECURE 2.0 Act, the age to begin RMDs is currently 73 for individuals born between 1951 and 1959. The starting age will increase to 75 for those born in 1960 or later (this change takes effect January 1, 2033). The “Required Beginning Date” is generally April 1st of the year following the year the individual reaches the applicable RMD age and is separated from service.

Roth TSP Exemption: A significant benefit, also from SECURE 2.0, is that Roth TSP balances are not subject to RMDs during the participant’s lifetime. RMD calculations are based solely on the participant’s Traditional TSP balance. This allows Roth funds to potentially grow tax-free for longer and offers more flexibility in managing taxable income in retirement and for estate planning.

Calculation and Fulfillment: RMDs are calculated annually based on the prior year-end Traditional TSP balance and IRS life expectancy tables. The TSP calculates this amount and notifies participants who are required to take an RMD. Any withdrawals taken during the year (e.g., installment payments) from the Traditional balance count towards satisfying the RMD. If the total withdrawn is insufficient by year-end, the TSP may automatically issue a payment for the remaining RMD amount by the deadline.

Penalty for Missed RMDs: Failure to withdraw the full RMD amount by the deadline can result in a substantial IRS excise tax, though SECURE 2.0 reduced this penalty from 50% to 25% of the shortfall, potentially further reduced to 10% if the error is corrected within a specific timeframe.

Spousal Rights After Separation

Federal law grants certain rights to spouses regarding TSP accounts, which persist after separation unless formally waived. For married FERS and BRS participants requesting total distributions or certain annuity options, notarized spousal consent is generally required to waive the spouse’s right to a specific type of joint life survivor annuity. For married CSRS participants, spousal notification is required for total distributions. These rules apply even if the participant and spouse are legally separated but not divorced.

Resources for Separated Participants

Detailed information on post-service options can be found in TSP publications such as Distributions (TSP BK05) and Tax Rules about TSP Payments (TSP BK26). The TSP website also offers comprehensive sections on withdrawals: Withdrawals in Retirement and Taking Money from Your Account.

Our articles make government information more accessible. Please consult a qualified professional for financial, legal, or health advice specific to your circumstances.