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 Temporary Holiday Rate Change

The USPS holiday rate change is in effect from October 3, 2021 to December 25, 2021. For affected shipments, see

The Production and Sandbox environments have been updated with the rate change. The change affects shipments with a ship date of October 3, 2021 or later.

2021 USPS Price Changes

The USPS 2021 mid-year price change went into effect August 29, 2021. For details, see

The USPS 2021 January price change took effect January 24, 2021.

2021 New 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.