Save Time and Money with These 5 Tips for Accurate USPS Postage Payment

USPS Priority Mail box – tips for accurate USPS postage payment

By USPS Payment Technology     

The United States Postal Service® is committed to helping online businesses ship their products quickly and easily. Accurately paying USPS postage ensures the best experience for both shippers and their customers; underpayment may delay delivery and result in the recipient being charged the additional postage fee.

Following are some tips and tricks to make sure that you are not underpaying on postage with USPS shipping:      

  • Round up on weights: The USPS rounds up on weights to either the pound or ounce, where applicable. For example, if you have a package that weighs 3 lbs. 5 oz., it should be rated at 4 lbs. If you have a First Class Package that weighs 7.3 oz., it must be rated at 8 oz. This is true for all classes of mail — domestic and international.

DYMO scale – USPS First Class Package – USPS postage Priority Mail

  • Check the dimensions: Similar to other mail carriers, USPS applies dimensional weight pricing (DIM) that may affect the cost of shipping for products of a certain size. For domestic Priority Mail, it may apply to packages with a volume over a cubic foot. Always entering your package’s dimensions will ensure that you are accurately charged for DIM weight. You can find more information on DIM weight here.

Box dimensions -Dimensional Weight Pricing - USPS postage Priority Mail

  • Match the label to the packaging: USPS provides a wide range of shipping options to help you meet your mailing needs. Make sure that the label you are using matches the packaging. For example, if you are using a Flat Rate box, you should also use a Flat Rate label. The same goes for priority packaging, anything in a Priority Mail box requires a Priority Mail label.

USPS Priority mail box - USPS postage label tips • H1: Avoid These Common Shipping Mistakes: Tips for Accurate USPS Postage Payment

  • Double check the zone: If you are using PC postage software, verify that the origin address is up to date before printing the label.

By following these easy steps, you can ensure that you receive the best possible USPS shipping experience.

For more information on USPS, check out our FedEx vs. UPS vs. USPS page.

About Endicia

Endicia is a leading provider of internet-based postage services that make it easier and more affordable to ship parcels through the U.S. Postal Service®. We know that shipping can be complex and our goal is to simplify your shipping operations so you can focus on doing what you do best. Visit us at to learn more.

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323 N. Mathilda Avenue
Sunnyvale, CA 94085-4207



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