Binance referral codes provide fee discounts. Many people miss this step. Register on Binance — the referral code is pre-filled. Download the Binance app for in-app registration.
Where to Enter
Below the email/password fields on the registration page, there's a "Referral Code (optional)" field — often collapsed by default, needing a click to expand. Referral links auto-fill this field.
Benefits
10-20% of your trading fees returned to your account.
Can You Add It Later?
No. Binance does not support post-registration referral code entry. The code can only be entered during registration. If you missed it and haven't traded, you could theoretically cancel the account and re-register, but that's cumbersome.
Best Practice
Always register through a referral link to ensure the code is correctly applied.