How to Set up FedEx One Rate Using Carrier Rules


If you’re looking for the Fedex-One Rate service in ShipperHQ, you won’t see it listed as a live rate carrier since this needs to be set up using custom rules. The One Rate service is basically a flat rate package service that varies based on zone but is not applicable to include any account based discounts and is suggested by Fedex as an alternative for services like standard list rates or using your negotiated rates.

The Article below will describe an example package size and how you would set this up on a table rate carrier.  If you have more than one package size then you will just duplicate the rules used for the package we review and make the adjustments according to what Fedex has listed on their One Rate Service Document.

Keep in mind you will need Fedex live rates as well as the methods in the document linked above or you won’t be able to get accurate rates based on the customer’s location.


FedEx One Rate is based on different box sizes so you will need to enable the Dimensional Shipping feature and define your boxes.


For the Example we will use the row outlined in Red from the graph below. This will be for when Fedex Medium Box is used for a customer within a Fedex 2 day zone resulting in a $20.10 Shipping price.

  1. Ensure that you have already enabled the methods listed in orange on the picture above before we create carrier rules around each column. or you will have to start the rule over.
  2. On the carrier rules page, Click Add New
  3. You will need to set the carrier rule to the following settings:
    • Name: Any name like MediumBox-2ndDay-Zone2 so you know what the functionality is for this rule.
    • Applicable Shipping Methods: Make sure that Fedex 2Day is selected in this section
    • Conditions: Make sure the Local Zone (Zone 2) is in the includes zones section.
    • In the advanced conditions section you will select the FedEx Medium Box shipping group:
    • Lastly, make sure the actions section shows like below, with  “Set Rates” and make sure this flat rate applies per each item within the shipping group in the section above, so OneRate-MediumBox is the shipping group in question here. Then the cost entered in the  Shipping Rate in the bottom of the actions section  to be $20.10.

Then you would repeat those steps for each row and just adjust the shipping groups, zones and methods accordingly.

Final Steps

To make sure this reads the correct rates based on the size of the item, you will need to set the eligible products with the correct shipping group.
Click here and look for the applicable platform you’re using to get the steps you need to take to put shipping groups on your products. 

If you receive any errors when saving the carrier, review the Troubleshooting steps first. If issues persist, reach out to us at or