USPS Priority Mail® Regional Rate boxes

By Rob Zaleski
Jan 19, 2018
USPS regional rate boxes

There are two types of USPS Priority Mail® Regional Rate boxes:

  • USPS Regional Rate Box A: Shipments of up to 15 lbs.
  • USPS Regional Rate Box B: Shipments of up to 20 lbs.

Unlike USPS flat rate boxes which cost the same regardless of destination, the rate you pay for Regional Rate boxes varies based on how far you are sending them (e.g. what zone or “region”). However, in a sense it is a “flat” rate because the shipping costs the same, regardless of weight, for packages shipped to the same “zone.” Most online merchants can find savings by using Regional Rate boxes within their shipping service mix.

One important detail to remember: Regional Rates are strictly an online service. You can’t get the boxes at your local post office, and if you buy the postage for them at the post office, they will add a fee to the overall price.

Your shipping software can tell you when to use Regional Rate and when to use Flat Rate. Try ShippingEasy free for 30 days!

For example, if you ship a 10 lb. package across the country from Houston, TX to New York, NY, here are the rates:

  • Priority Mail® Medium Flat Rate Box costs $13.20 (ShippingEasy rate)
  • Priority Mail® costs $26.67 (ShippingEasy rate)
  • Priority Mail® Regional Rate Box A costs only $10.42 (ShippingEasy rate)

SAVINGS on postage: $2.78 – $16.27

If you ship this same 10 lb. package closer to home (where Regional Rate excels) from Houston, TX to Austin, TX, look at the rates:

  • Priority Mail® Medium Flat Rate Box costs $13.20 (ShippingEasy rate)
  • Priority Mail® costs $9.76 (ShippingEasy rate)
  • Priority Mail® Regional Rate Box A costs only $7.68 (ShippingEasy rate)

SAVINGS on postage: $2.08 – $5.52

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Get USPS Regional Rate Boxes Free

The cost of flat rate boxes and regional rate boxes is free, and you can order them from

Order Regional Rate boxes from USPS for free

All Regional Rate box sizes are listed below, where you can view and order each individual box at the following links:

Priority Mail Regional Rate Box – A1

Priority Mail Regional Rate Box – A2

Priority Mail Regional Rate Box – B1

Priority Mail Regional Rate Box – B2

Which carrier wins? See 3 scenarios comparing USPS, FedEx, and UPS.

Find USPS Shipping Zones provides a tool to quickly find out which zone your package falls into depending on the starting location and ending location of where it will travel. Use this Calculate Zone Tool to find out which Zone your item falls under. From there you can easily check its regional rate.

2020 Regional Rate & Zone Chart

Here are the new rates for 2020 on Regional Rates. You can see there are increases, but it’s still a valuable service that can beat Priority Rate and Flat Rate with their incoming increases as well.

USPS Regional Rate
Box A
Commercial Rates
Commercial Rates
Price Increase
Zones 1 & 2$7.65$7.68$0.03
Zone 3$7.85$7.92$0.07
Zone 4$8.12$8.21$0.09
Zone 5$8.76$8.92$0.16
Zone 6$10.00$10.42$0.42
Zone 7$10.55$11.13$0.58
Zone 8$11.20$12.10$0.90
Zone 9$15.64$18.69$3.05

USPS Regional Rate
Box B
Commercial Rates
Commercial Rates
Price Increase
Zones 1 & 2$8.05$8.07$0.02
Zone 3$8.50$8.51$0.01
Zone 4$9.40$9.42$0.02
Zone 5$10.65$11.53$0.88
Zone 6$16.15$16.72$0.57
Zone 7$18.47$19.21$0.74
Zone 8$21.03$21.89$0.86
Zone 9$29.73$34.38$4.65

A1 and A2 box dimensions: (<15 lbs)

  • 10″ x 7″ x 4 3/4″
  • 12 13/16″ x 10 15/16″ x 2 3/8″

B1 and B2 box dimensions: (<20 lbs)

  • 12″ x 10 1/4″ x 5″
  • 15 7/8″ x 14 3/8″ x 2 7/8″

Available online only. Neither rates nor boxes available at Post Office.

USPS Priority Mail Rate & Zone Chart for Comparison

Priority Mail
L, 1 & 2Zone 3Zone 4Zone 5Zone 6Zone 7Zone 8Zone 9

Learn about all the 2020 USPS shipping rate changes by downloading our free guide, complete with charts, carrier comparisons, and best practices to save on shipping. Click below to download the guide now!


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Rob Zaleski

Content Marketing Manager at ShippingEasy
I'm a digital content and social media nerd with a passion for telling stories, helping connect people, and finding joy in the details.

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