What pricing levels does USPS have?
EasyPost has a special agreement with USPS that allows us to give you discounts below Commercial pricing for certain shipments. This applies to Priority Mail and USPS Ground Advantage mail classes and for most shipments 20 pounds or less, flat rate products, and cubic pricing tiers. Prices in the table below include the EasyPost Merchant Discount that you can’t get at the Post Office. Sign up now and get started.
What is EasyPost Merchant Discount Pricing?
USPS has several pricing tiers that can dramatically impact the shipping rates you receive for your packages. USPS Retail Pricing is the starting tier for pricing. This is the USPS rate you’ll pay at your local Post Office or other retail locations. Up until Jan. 22, 2023, USPS had two commercial pricing categories: Commercial Base Pricing (CBP) and Commercial Plus Pricing (CPP). On Jan. 22, 2023, USPS collapsed these into one Commercial pricing category. Commercial Pricing offers savings over USPS Retail.
But there is another tier that can save you even more money on USPS shipments, EasyPost Merchant Discount Pricing. The rates available from EasyPost are even better than USPS Commercial.
Why ship with EasyPost instead of USPS directly?
Integrating with EasyPost’s Shipping API rather than USPS offers unique advantages that will help you scale your online business and future proof your shipping infrastructure. Our best-in-class API is a single point of integration that provides access to 100+ carriers worldwide including USPS shipping rates. Today you may be shipping exclusively with USPS. Tomorrow you might consider expanding your business across borders and when you do, adding a new carrier account just takes minutes. Discover more about USPS international shipping rates and cost savings over retail rates with EasyPost.
USPS Commercial EasyPost Merchant Rate Charts
Effective Date: January 18, 2026
| Weight | Priority Mail | First-Class Mail | Priority Mail Express | Library Mail | Media Mail |
|---|---|---|---|---|---|
| 1 oz. | $7.41 | $1.63 | $28.80 | $4.25 | $4.47 |
| 2 oz. | $7.41 | $1.90 | $28.80 | $4.25 | $4.47 |
| 3 oz. | $7.41 | $2.17 | $28.80 | $4.25 | $4.47 |
| 4 oz. | $7.41 | $2.44 | $28.80 | $4.25 | $4.47 |
| 5 oz. | $7.41 | $2.72 | $28.80 | $4.25 | $4.47 |
| 6 oz. | $7.41 | $3.00 | $28.80 | $4.25 | $4.47 |
| 7 oz. | $7.41 | $3.28 | $28.80 | $4.25 | $4.47 |
| 8 oz. | $7.41 | $3.56 | $28.80 | $4.25 | $4.47 |
| 9 oz. | $7.41 | $3.84 | $29.25 | $4.25 | $4.47 |
| 10 oz. | $7.41 | $4.14 | $29.25 | $4.25 | $4.47 |
USPS Flat Rate Options
| Service | Type | Sizes* | EasyPost Predefined Package |
EasyPost Rate | Retail Rate | % Savings with EasyPost |
|---|---|---|---|---|---|---|
| Priority | Envelope | 12 ½" x 9 ½" | FlatRateEnvelope | $8.90 | $11.95 | 25.52% |
| Priority | Window Envelope | 10" x 5"; 12 ½" x 9 ½" | FlatRateEnvelope | $8.90 | $11.95 | 25.52% |
| Priority | Small Envelope | 10" x 6" | SmallFlatRateEnvelope | $8.90 | $11.95 | 25.52% |
| Priority | Padded Envelope | 12 ½" x 9 ½" | FlatRatePaddedEnvelope | $10.20 | $12.95 | 21.24% |
| Priority | Legal Envelope | 15" x 9 ½" | FlatRateLegalEnvelope | $10.10 | $12.25 | 17.55% |
| Priority | Small Box | 8 11⁄16" x 5 7⁄16" x 1 ¾" | SmallFlatRateBox | $9.80 | $12.65 | 22.53% |
| Priority | Medium Box | 11 ¼" x 8 ¾" x 6"; 11" x 8 ½" x 5 ½" | MediumFlatRateBox | $18.50 | $22.95 | 19.39% |
| Priority | Large Box | 12" x 12 ¼" x 6" | LargeFlatRateBox | $25.70 | $31.50 | 18.41% |
| Priority | APO/FPO Box | 12" x 12 ¼" x 6" | LargeFlatRateBoxAPOFPO | $27.40 | $30.15 | 9.12% |
| Express | Envelope | 12 ½" x 9 ½" | FlatRateEnvelope | $28.80 | $33.25 | 13.38% |
| Express | Legal Envelope | 15" x 9 ½" | FlatRateLegalEnvelope | $29.10 | $33.50 | 13.13% |
| Express | Padded Envelope | 12 ½" x 9 ½" | FlatRatePaddedEnvelope | $29.35 | $34.15 | 14.06% |
* Outside dimensions
If you have any questions about our Commercial Pricing use the button below to contact us.
Effective Date: October 5, 2025
USPS Ground Advantage Commercial Parcels - Cubic
| Cubic Feet range up to | Zone 1 | Zone 2 | Zone 3 | Zone 4 | Zone 5 | Zone 6 | Zone 7 | Zone 8 | Zone 9 |
|---|---|---|---|---|---|---|---|---|---|
| 0.10 | $6.00 | $6.07 | $6.19 | $6.50 | $7.31 | $8.10 | $8.35 | $8.83 | $9.38 |
| 0.20 | $6.08 | $6.18 | $6.29 | $6.68 | $7.52 | $8.65 | $8.97 | $9.65 | $10.96 |
| 0.30 | $6.44 | $6.50 | $6.76 | $7.19 | $8.38 | $9.81 | $10.33 | $11.29 | $13.58 |
| 0.40 | $6.95 | $6.99 | $7.29 | $7.92 | $9.53 | $11.23 | $11.96 | $13.25 | $16.01 |
| 0.50 | $7.35 | $7.40 | $7.69 | $8.37 | $10.21 | $12.04 | $12.94 | $14.49 | $17.50 |
| 0.60 | $7.54 | $7.59 | $7.90 | $8.76 | $10.81 | $12.78 | $13.83 | $15.60 | $18.85 |
| 0.70 | $7.62 | $7.67 | $8.09 | $9.06 | $11.31 | $13.40 | $14.58 | $16.53 | $19.97 |
| 0.80 | $7.69 | $7.74 | $10.50 | $9.33 | $11.79 | $13.97 | $15.28 | $17.41 | $21.03 |
| 0.90 | $10.04 | $10.26 | $11.33 | $12.44 | $12.27 | $14.56 | $15.98 | $18.31 | $22.12 |
| 1.00 | $11.13 | $11.43 | $12.30 | $13.46 | $12.98 | $15.41 | $17.01 | $19.62 | $23.70 |
Priority Mail Commercial Parcels - Cubic
| Cubic Feet range up to | Zone 1 | Zone 2 | Zone 3 | Zone 4 | Zone 5 | Zone 6 | Zone 7 | Zone 8 | Zone 9 |
|---|---|---|---|---|---|---|---|---|---|
| 0.10 | $7.43 | $7.66 | $7.98 | $8.61 | $10.68 | $12.05 | $12.62 | $12.72 | $30.64 |
| 0.20 | $7.47 | $7.70 | $8.02 | $8.85 | $10.85 | $12.58 | $13.38 | $13.43 | $32.35 |
| 0.30 | $7.99 | $8.09 | $8.79 | $10.13 | $13.58 | $15.52 | $16.97 | $17.31 | $40.66 |
| 0.40 | $9.20 | $9.40 | $10.33 | $12.19 | $16.59 | $20.42 | $22.35 | $22.40 | $53.96 |
| 0.50 | $9.74 | $9.89 | $10.96 | $13.14 | $18.30 | $22.37 | $24.81 | $25.22 | $60.40 |
Effective Date: January 18, 2026
Spend less on shipping today
EasyPost’s multi-carrier Shipping API includes:
- USPS Merchant Discount Pricing on ALL accounts
- Instant access to USPS, UPS, FedEx, DHL, and 100+ carriers
- Tracking, rating, address verification, and insurance features
- FREE EasyPost testing with no upfront costs
- Client libraries for .NET, Java, Ruby, Python, Node, PHP, and Go
