Activate shipping with USPS

If you have negotiated discounted shipped rates through your own account with USPS, then you can display your discounted shipping rates to your customers at checkout. To display your negotiated rates, you need to have the carrier calculated shipping feature on your Shopify account. For more information, refer to Third-party carrier-calculated shipping rates.

After you connect your account, USPS commercial rates are shown at checkout by default. USPS commercial rates are less expensive than the retail rates and the labels must be purchased online. If you want to display the more expensive rates, then you can enable the retails rate when you add USPS calculated rates.

Activate calculated shipping for USPS

  1. In the Carrier accounts section, add USPS as a shipping carrier:
    • If you don't have any shipping carrier accounts added, then click Connect carrier account, and then click Connect account next to USPS.
    • If you already have a shipping carrier account added, then click Manage carriers, and then click Connect account next to USPS.
  2. In the Connect USPS dialog, select USPS commercial rates to activate your negotiated USPS rates. If you haven't negotiated your rates with USPS, then select USPS retail rates.
  3. Click Save.

After you connect your USPS account, you need to create your USPS calculated rates to add USPS rates to your checkout.

Deactivate USPS

If you no longer want to use USPS calculated rates, then you need to make sure the service isn't offered to your customers at checkout.


  1. In the Carrier accounts section,, click Manage carriers.
  2. Next to USPS, click Disconnect account.
  3. In the dialog, click Disconnect account to confirm the deactivation.

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