How referral codes actually work

An exchange makes money on trading fees. It will happily give part of that revenue to whoever brings it a trader who generates those fees, because a share of something is worth more than all of nothing. That arrangement is the affiliate programme, and a referral code is the identifier that ties a new account to a particular affiliate.

The affiliate then has a choice: keep the whole commission, or hand part of it back to the user as a standing fee discount. Most exchanges support this directly, applying the discount to the user's fee schedule at the exchange level. This is why a referral code can genuinely make your trading cheaper rather than merely feeling like a marketing gimmick. The discount is a real line in the exchange's own fee engine.

It also means the discount costs you nothing. You are not paying more so that someone else gets paid; the exchange is dividing revenue it was going to collect anyway. Trading without a code simply means the exchange keeps the entire fee.

This is the single most important operational detail and the one people most often get wrong. Almost every exchange binds the referral relationship permanently at the moment of registration. Once the account exists, the relationship cannot be added, changed or transferred, not by you, and not by support.

The practical consequence is that if you already have an account on an exchange, the referral discount for that exchange is closed to you. Creating a second account to capture it violates the terms of service on essentially every venue and typically results in both accounts being frozen during verification.

So the sequence matters: decide which exchange you want, then open the account through the link. Not the other way around.

Referral sites advertise the discount percentage because it is the biggest number they can put on a page. It is also the least useful one, because it is a percentage of a base rate that differs between exchanges.

Work it through. A 30% discount on a 0.10% taker fee gives you an effective rate of 0.07%. A 10% discount on a 0.02% taker fee gives you 0.018%. The second exchange advertises a discount a third the size and costs you roughly a quarter as much. Comparing the discounts tells you nothing; comparing the effective rate tells you everything.

This is exactly what the calculator on this site does. It takes the published standard fee, applies the discount, and reports what you actually pay at your volume. Any comparison that stops at the discount percentage is optimising the wrong number.

A signup bonus pays once. A fee discount pays on every trade for as long as the account exists. These are frequently presented side by side as if they were comparable, and for anyone who trades with any regularity they are not close.

A bonus worth a few tens of dollars is attractive at the moment of signup and irrelevant three months later. A standing discount of even a few basis points, applied to a year of trading, will usually dwarf it. The bonus is worth optimising for only if you intend to trade rarely, in which case the fee schedule barely matters either.

Korean won-market exchanges pay one-off invite rewards; the offshore derivatives venues pay lifetime rebates. Judging them by the same standard is what leads people to open an account for a bonus and then pay it back several times over in fees.

Most referral pages are rewritten marketing copy with a link attached. A few checks separate the ones that did any work: