USPS Price Changes

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Latest Changes

For details on the latest USPS® changes, please see:

For questions or comments on USPS changes, please contact Client Support at

2021 USPS Price Changes

The USPS 2021 price took effect January 24, 2021. For details, see:

2021 New USPS Rounding Rules

New USPS rounding rules took effect January 9, 2021. The new rules round dimensions to 2 decimal places (e.g. 0.12) instead of 3 decimal places (e.g. 0.123) when determining price and rates.

2020 Temporary Postage Increase

The USPS temporary postage increase applied to shipments created with ship dates on or after October 18, 2020 and on or before December 27, 2020. The increase affected Commercial Domestic prices but did not affect Retail or International prices.

2020 USPS Price Changes

The 2020 USPS price changes took effect January 26, 2020. Highlights of the price changes included:

  • USPS Retail Ground packages ("rates.serviceId": "STDPOST") that exceed one cubic foot (1,728 cubic inches) are now be priced at the greater of these two values: actual weight or dimensional (DIM) weight. The change applies to all zones. Balloon pricing is eliminated, but Oversized pricing still applies.

  • Support for shipping to the Republic of South Sudan has been added by USPS. Set "countryCode": "US" in the Address Object.

  • For shipments that use one of the Adult Signature special services, the shipping label now has new banner text indicating the signer must be at least 21 years old. The labels generated by the Shipping APIs automatically display the banner text.

2019 USPS Rules Changes

On June 23, 2019, USPS made the following rules changes, which did not affect prices:

  • The dimensional weight divisor for Priority Mail packages was adjusted from 194 to 166.

    Pricing for Priority Mail, Priority Mail Express, and Parcel Select packages that exceed one cubic foot (1,728 cubic inches) now used the greater of the actual weight and the dimensional (DIM) weight, for all zones. Previously, the DIM weight applied only to Priority Mail packages delivered to zones 5-9.

  • The weight limit for First-Class Mail International (FCMI) was adjusted from 64 ounces to 15.994 ounces.

  • PMOD labels addressed to an SCF, ASF, ADC or NDC destination were now required to reflect the National Air and Surface System (NASS) code, along with the facility name and state. The NASS code is found in the Drop Entry Point View File available at the USPS FAST Website:

2019 USPS Price Changes

The USPS 2019 price changes took effect January 27, 2019 and included the following major changes:

  • USPS merged Commercial Plus Pricing (CPP) and Commercial Base Pricing (CBP) into one discount level called “Commercial Pricing.”

  • The existing ounce-based pricing structure for USPS First-Class Package Service and First-Class Package Return Service was changed to a zone-based pricing structure.

  • Balloon pricing for USPS Priority Mail and Parcel Select services was eliminated.

2018 USPS Price Changes

The USPS 2018 price changes took effect January 21, 2018 and reflected an average 3.9 percent increase across shipping services as compared to 2017 rates. The changes affected both domestic and international shipping, including Priority Mail, Priority Mail Express, and Parcel Select.

As part of the changes, First-Class Mail International (FCMI) shipments could now contain only documents. They could no longer contain goods. Goods could be shipped via First-Class Package International Service (FCPIS) and other services.