You can! As long as it's been less than 7 days since you first became active in Uber's system, you can retroactively apply a referral code and still receive a referral bonus.
Please note that a referral award amount depends on the city you will be driving in and the current Uber promo (how many rides you have to do to get the bonus). We always recommend shooting Uber a quick message to find this out.
This rule excludes all New York City partners. If you're a New York City partner, you must visit a New York City Greenlight Hub to add a referral retroactively.
This info was updated April 18, 2019
HOW DO YOU RETROACTIVELY APPLY AN UBER DRIVER REFERRAL CODE?
Message Uber right online to let them know you signed up but “forgot to enter my code (UBER94UND) and want to confirm the bonus.” Use the info below as a guide.
Uber should respond within 24-48 hours to confirm.
OR VISIT A GREENLIGHT LOCATION NEAR YOU TO RETROACTIVELY APPLY AN UBER DRIVER REFERRAL CODE
Uber Experts can manually add the Uber referral bonus code within 7 days of becoming active. After that, they won’t be able to help you. Make sure to bring my Uber contact information to your local Greenlight location.
Name: Tara Tierney
Phone number: 508-965-6923
Referral code: UBER94UND