Participants can make a one-time payment or set up recurring ACH payments through the WEX participant portal. They can also mail a check made payable to WEX. The payment mailing address is PO Box 2079, Omaha, NE 68103-2079.

(Please note that there is no charge for recurring ACH or debit card payments, but a surcharge up to 3% will be applied to recurring credit card payments and all one-time payments will incur a $20 processing fee.)