FedEx One Rate is a flat-rate shipping service for US domestic shipments designed for predictable pricing. This service provides a single, all-inclusive price that covers common additional fees, such as residential delivery, delivery area, and fuel surcharges.
For online businesses, this fixed cost model is beneficial because pricing is determined by the box size and selected delivery speed rather than the package weight or destination distance.
ShipHero's FedEx integration allows you to enable FedEx One Rate to automatically calculate the best rates and streamline your fulfillment process.
Before You Begin
- Account setup: Review Before You Connect a Carrier Account in ShipHero for custom profiles, multi-warehouse accounts, and 3PL client settings.
Service Requirements and Limitations
- Weight Limits: Maximum weight for boxes is 50 lbs. FedEx Envelopes are limited to 10 lbs.
- US Domestic Only: This service is available only for shipments within the United States.
- Single Package: FedEx One Rate does not support multi-package shipments. Each package must be processed as an individual shipment.
- Excluded Fees: Certain premium services are not included in the flat rate, such as Saturday delivery, signature options, or address corrections.
- Rate comparisons: FedEx One Rate is quoted against other carriers when using Cheapest and Rateshop+ shipping methods as long as the information provided in the label request falls within the FedEx One Rate service and package requirements.
Available Service Methods
- Overnight (First, Priority, and Standard)
- 2 Day (including AM)
- Express Saver
Packaging Requirements
To utilize FedEx One Rate, you must use specific FedEx branded packaging or create custom boxes that meet the requirements listed in the table below.
| Package Type | Dimensions (L x W x H) |
|---|---|
| FedEx Envelope | 9-1/2" x 12-1/2" |
| FedEx Pak / Padded Pak | 10-1/4" x 12-3/4" to 12" x 15-1/2" |
| FedEx Small Box | 10-7/8" x 1-1/2" x 12-3/8" OR 8-3/4" x 2-5/8" x 11-1/4" |
| FedEx Medium Box | 11-1/2" x 2-3/8" x 13-1/4" OR 8-3/4" x 4-3/8" x 11-1/4" |
| FedEx Large Box | 12-3/8" x 3" x 17-1/2" OR 8-3/4" x 7-3/4" x 11-1/4" |
For more details, view our guide on How to Set Up Shipping Boxes.
- FedEx Branded Boxes: Navigate to Shipping > Boxes and select FedEx on the Carrier filter. Check the Activate box for the packaging you intend to use. These are pre-configured with FedEx's dimensions and barcodes.
- Custom Boxes: If using custom packaging, dimensions must remain within official FedEx One Rate limits. The packaging type in ShipHero must be set to BOX or POLY. If the packaging type is not set for a box, FedEx One Rate will not be returned in a quote or label generation request.
Enabling FedEx One Rate in ShipHero
Step 1: Carrier Activation
Contact your FedEx account representative to confirm that FedEx One Rate is enabled on your carrier account. This feature must be active at the carrier level before ShipHero can process these rates.
Step 2: Connect FedEx Account
Ensure your FedEx account is connected to ShipHero. If you are connecting a new account, follow the instructions here: Connecting your FedEx Account to ShipHero.
Step 3: Configure Settings
- Navigate to Shipping > Carriers.
- Select the Pencil Icon (Edit) next to your FedEx account.
- Locate and check the Enable FedEx One Rate checkbox.
- Click Update to save your changes.