What does a referral code do?
It's set the moment you sign up.
Almost every exchange sign-up page has a “Referral code (optional)” field. Whether you fill it, and with whose code, looks trivial. It actually decides the fee on every trade you'll ever make.
What does a crypto exchange referral code do?
A referral code is a user's referral ID. Entering one at sign-up creates a referral link between you and that person, normally permanent. It works both ways:
| For you | For the referrer | |
|---|---|---|
| Fees | Some codes include a discount on every trade | Earns a share of your fees |
| New-user rewards | You still get the exchange's rewards | Some campaigns add invite rewards |
| Account and funds | Fully yours; the referrer can't see or touch them | Sees invite counts and commission only |
So a code with a discount only helps you. On OKX, OK66688 takes 20% off spot and futures fees for life, applied automatically.
Why do exchanges use referral codes?
It's one of their main ways to grow. Sharing part of the fee with the referrer and the new user is cheaper and easier to track than advertising.
- For the exchange: growth it can measure and pay for by results;
- for the referrer: commission that grows with your trading;
- for you: a discount you'd otherwise give up.
The field is optional, but at most exchanges it can't be filled in after sign-up.
Where do I find a referral code?
- Friends: anyone already using the exchange has a code under “Invite friends”.
- Websites and creators: pages that openly state the code and what it gives, like our OKX code OK66688.
- Campaign pages: some official promotions come with a code.
Check three things: the sign-up page is the exchange's official page; the code field shows the code you want; nobody asks you to send money, pay a deposit or join a group. If money is involved, it's a scam, not a referral.
What is a crypto rebate?
A rebate returns part of your fees. There are two kinds:
| Built-in discount | Private cashback | |
|---|---|---|
| How it works | The exchange charges less on each trade | The referrer gets commission, then pays part back to you |
| Conditions | Enter the code at sign-up | Join a group, share your UID, hit volume targets |
| How much | OKX with OK66688: fixed 20% | Claims vary: 30%, 50%, 70%… |
| Personal info needed | None | UID, sometimes screenshots or messaging apps |
| Reliability | System rule, every trade | Depends on the other person; can stop anytime |
Which exchange has the highest referral rebate?
Most “highest rebate” claims are private cashback from affiliates, not official discounts. High numbers come with catches:
- cashback depends on someone's goodwill; if it stops, you have no recourse;
- cashback groups are a common entry point for signal groups, coin shilling and pig-butchering scams;
- the UID and trading data you share can be misused.
For beginners, a built-in discount is the better choice: nobody to contact, nothing to share, applied to every trade automatically. OKX code OK66688 works this way.
Going with OKX? Register with OK66688 and pay 20% less on spot and futures fees for life. OKX applies the discount automatically; nobody handles your money
Referral codes:
FAQ.
01What does a crypto exchange referral code do?
It links your account to a referrer at sign-up. Codes with a discount cut the fee on every trade; new-user rewards still apply.
02Why do exchanges use referral codes?
It's how they grow: part of the fee goes to the referrer and the new user, paid only for results.
03Where can I find a referral code?
A friend's “Invite friends” page, websites or creators who state the code openly, or official campaign pages.
04Do I have to enter one?
No, but you'll miss the discount, and it usually can't be added later.
05What is a crypto rebate?
A partial return of your fees, either as a built-in discount or as private cashback from an affiliate.
06Which exchange has the highest referral rebate?
High numbers are usually private cashback that depends on the affiliate. A built-in discount is steadier, e.g. OKX's fixed 20%.
07Can my referrer see my funds?
No. Referrers see invite counts and commission only, never your balance or trades.
Done with this page?
Here is the next one.
How Binance and OKX differ, why Binance may not be available to you, which exchange charges least, what a referral code does, how to spot a fake exchange, and when buying crypto is illegal.
Binance vs OKX: what is the difference?
Which is bigger, which charges less, which is safer and easier to use, and which one a beginner should pick.
Access · Why can't I download BinanceBinance not available in your country?
Why Binance is restricted in some places, why the app won't download, whether sign-up is safe, and Binance news from September 2026.
Fees · Crypto exchange fee comparisonWhich crypto exchange has the lowest fees?
OKX, Binance, Bybit, Bitget, MEXC and Coinbase fees side by side, spot and perpetuals, plus the hidden costs.
Scams · Is this crypto platform legitHow to tell if a crypto exchange is fake
Real vs fake exchanges, what scam platforms fear, what to do if you can't withdraw, plus an 8-point check.
Legal · Can I get in trouble for trading cryptoIs buying crypto on an exchange illegal?
Buying, selling and cashing out carry different risks. How rules differ, when bank accounts get frozen, and the lines never to cross.
Pick your exchange once.
Use code OK66688.
Pay 20% less on spot and futures fees for life, applied automatically by OKX. New-user rewards still apply.