USPS Shipping Costs: How Much Will You Pay?

Last updated 5 days ago. Our resources are updated regularly but please keep in mind that links, programs, policies, and contact information do change.

An occasional sender can pay less to mail a package without choosing a slower service. The U.S. Postal Service (USPS) automatically gives discounted commercial pricing to everyone who orders labels through its online Click-N-Ship service.

That makes the advertised Post Office price a starting point for a comparison, rather than the only price available. To find the lowest price a parcel qualifies for, compare the same packed parcel and delivery deadline across services, packaging options and places to buy the label.

Start with the package and the delivery deadline

USPS Ground Advantage normally has a delivery standard of 2 to 5 business days, without a delivery guarantee. Priority Mail normally takes 2 to 3 business days, also without a guarantee. Those ranges overlap, so the service name alone does not show which one will meet a particular deadline.

Priority Mail Express advertises delivery in 1 to 3 days by 6 p.m., with a money-back guarantee subject to exceptions. Of these three services, it is the only one with a guarantee.

Priority Mail standards are 2 to 4 business days for shipments to or from Alaska, Hawaii, American Samoa, Puerto Rico and the U.S. Virgin Islands, and 2 to 6 business days for shipments to or from Guam, the Northern Mariana Islands and the Freely Associated States. The Freely Associated States are the Federated States of Micronesia, the Republic of the Marshall Islands and the Republic of Palau. Ground Advantage takes 2 to 8 business days for hazardous-material or live-animal shipments within the contiguous United States. For shipments between the contiguous 48 states and Alaska, Hawaii, American Samoa, Puerto Rico, Guam, the Northern Mariana Islands or the Freely Associated States, its standard is 10 or more business days. These longer standards are also estimates, not guarantees.

The official USPS calculator asks for the origin and destination ZIP Codes, the item’s value, the planned mailing date and the mailing time. USPS also tells senders to have the package weight, shape and size measurements ready for a domestic postage calculation. Measure the packed parcel that will actually be mailed, then compare services for the same shipment and date.

Retail prices and online discounts

The USPS price list, Notice 123, took effect on October 4, 2026. The published schedule specifies an effective period of October 4, 2026 through January 17, 2027 for those temporary prices. The mailing date matters here: a saved summer rate sheet is not an autumn shipping quote.

For this price schedule, the advertised Post Office starting price is $8.40 for Ground Advantage. Priority Mail starts at $11.50 at a Post Office. A starting price is the least a parcel can cost with that service, not a promise that every parcel will cost that amount.

All Click-N-Ship users automatically receive discounted commercial pricing when ordering labels online. Compare the online quote with the counter price before deciding that one service is too expensive.

The domestic retail Priority Mail Flat Rate Envelope costs $13.90 under this schedule. The other containers have their own fixed prices. The commercial column in the table below comes from USPS’s published commercial price list, the pricing category Click-N-Ship uses, not a separately negotiated business discount. The online quote shows the exact price for a particular label.

When Flat Rate is worth comparing

Domestic Priority Mail Flat Rate containers carry mailable items up to 70 pounds at the same price regardless of the domestic destination. The envelope or box flaps must close within their normal folds.

In an ordinary box, retail Priority Mail is priced by weight and zone, with any fraction of a pound rounded up to the next whole pound. USPS describes postal zones as a measure of distance, running from nearby Zone 1 to distant Zone 9. A Flat Rate container takes weight and distance out of the price, which is why it is worth comparing for a heavier parcel or a longer trip.

Flat Rate is not automatically the cheaper choice. For a light parcel traveling a short distance, price an ordinary box as well, because the fixed charge may not save money.

USPS offers the Priority Mail Flat Rate containers as free supplies, with postage priced separately. Do not use a Priority Mail box to send a Ground Advantage shipment merely because the empty box was free.

Why the size of the box can raise the price

Dimensional weight is a way of charging for space: a large, light box can be billed as though it were heavier. For a rectangular Priority Mail parcel exceeding one cubic foot (1,728 cubic inches), USPS uses the higher of actual weight and dimensional weight. Ground Advantage applies the same higher-of-the-two approach to a rectangular parcel exceeding one cubic foot.

For Priority Mail, round each measurement up to a whole inch, then multiply length by width by height. If the result is more than 1,728 cubic inches, divide it by 139 and round up to a whole pound to get the dimensional weight. Ground Advantage uses the same whole-inch rounding and divisor of 139 for that rectangular-package calculation. If the calculated dimensional weight exceeds 70 pounds, Ground Advantage charges the 70-pound price. A snugger box can therefore lower the bill even though the contents and their actual weight stay the same.

Ground Advantage retail parcels up to 15.999 ounces are rounded up to the next ounce tier; heavier parcels use pound prices rounded up. The retail ounce tiers are 4, 8, 12 and 15.999 ounces. Small changes near a tier or pound boundary can move a parcel into another price category.

Priority Mail allows up to 70 pounds and 108 inches in combined length and girth. Girth is the distance around the thickest part of the package. Ground Advantage permits up to 70 pounds and 130 inches in combined length and girth. A parcel can therefore fit one service’s size limit while exceeding another’s.

USPS adds a nonstandard fee for a parcel longer than 22 inches, larger than two cubic feet or with certain listed characteristics, as the table below shows. The listed characteristics include cylindrical tubes or rolls, cans, wooden or metal boxes, more than 24 ounces of liquid in glass containers, and 1 gallon or more of liquid in metal or plastic containers.

The table uses the Ground Advantage characteristic fee from the price list now in effect; a summary on a USPS service page can show a different amount.

For both services, a parcel subject to both a length and a characteristic nonstandard fee pays only the higher fee. A volume fee may apply together with a length fee or a characteristic fee.

USPS says that Priority Mail Flat Rate packaging is exempt from nonstandard fees. That exemption is another reason to compare a properly fitting fixed-price container before choosing an oversized personal box.

Get a quote and avoid paying for the wrong service

Begin with the official USPS postage calculator, enter the actual mailing ZIP Codes and date, and use the final package measurements. Then compare the services the parcel qualifies for at the price for where the label will be bought, online or at a Post Office. Click-N-Ship lets an individual create a free USPS.com account, buy a label and print it for Ground Advantage, Priority Mail or Priority Mail Express. After selecting an eligible service and packaging, buy the matching label, print it and attach it to the package. If printing online is inconvenient, buying at the counter changes the price, not the delivery promise.

Ground Advantage includes USPS Tracking and $100 insurance for outbound and return shipments. Priority Mail includes tracking and up to $100 insurance with most shipments, subject to restrictions. Included insurance should not be confused with a guarantee that a package will arrive by an estimated day. Check the insurance conditions for the contents and value instead of assuming that every loss is payable.

Media Mail is an economy service for eligible books, film, manuscripts, recordings and computer media such as CDs and DVDs. Advertising is generally prohibited, although books may contain incidental book announcements; video games and computer or digital drives do not qualify. USPS can inspect Media Mail contents to confirm eligibility, and ineligible contents can lead to higher postage. Check eligibility before choosing this rate: a package that contains media does not automatically qualify for Media Mail.

Some hazardous materials are prohibited, others are restricted, and some may travel only by ground transportation. USPS directs senders to Publication 52, Hazardous, Restricted, and Perishable Mail, and requires secure packaging and the proper markings. Ask a Post Office about uncertain contents before purchasing postage.

Priority Mail International uses different weight limits: 4 pounds for Flat Rate Envelopes and Small Flat Rate Boxes, and 20 pounds for Medium and Large Flat Rate Boxes. Non-Flat-Rate Priority Mail International pricing depends on weight and destination country, with lower country-specific weight limits possible. Use an international quote and the country-specific requirements rather than applying the domestic table to an overseas address.

What changed from the 2025 prices

USPS price lists took effect on January 19, 2025, July 13, 2025 and October 5, 2025. The October prices were temporary holiday rates, which USPS announced would remain in place until midnight Central on January 18, 2026. A 2025 price for a box or envelope therefore depends on its effective date.

The Regular Flat Rate Envelope cost $11.90 at a Post Office under the 2025 holiday prices and costs $13.90 under the schedule that began October 4, 2026. For that holiday adjustment, USPS said the governors of the Postal Service approved the change and that it was subject to favorable review by the Postal Regulatory Commission. The governors are members of the Postal Service’s board who are appointed by the president and confirmed by the Senate. USPS marks the time-limited 2026 price files as final.