What is fiat gateway?

The part of an exchange, or a third-party provider plugged into it, that converts government currency into crypto through cards, bank transfers, and local payment rails.

Gateways carry their own fees, limits, and country coverage, separate from the exchange's trading fees. A card purchase through a gateway usually costs more than funding by bank transfer and placing an order.

The thing worth noticing is that a gateway is frequently a different company from the site you are using. A wallet or a small exchange with a buy button often embeds a third-party provider, which means a separate identity check, separate limits, a separate price, and a separate support desk when something goes wrong.

How it works

A gateway sits between the banking system and the crypto market. It takes your card payment or bank transfer, runs its own identity and fraud checks, buys the asset, and delivers it to your exchange balance or straight to a wallet address.

The cost has three parts and only one of them is usually labeled a fee:

1. The stated fee. A percentage of the purchase, disclosed at checkout.
2. The exchange rate margin. The gateway quotes a price that already includes a markup over the market rate. This is a spread, and it is the part people miss.
3. Your bank's charges. Some card issuers treat crypto purchases as a cash advance, adding a fee and interest from day one, and cross-currency purchases attract a foreign transaction charge.

Coverage is the other variable. Which payment methods work depends on your country, and local rails often cost far less than a card: sepa transfers in the euro area, ach transfer and wires in the United States, faster payment schemes elsewhere. Limits also differ, typically rising as you complete more verification tier steps.

Cards buy speed and pay for it. Bank transfers are slower and cheaper, and the difference on a single purchase is often larger than a year of trading fees.

Example

Illustrative arithmetic on a $500 purchase. Through a card gateway charging 2.5% with a 1% rate margin, you pay $12.50 plus $5, so $17.50 total and you receive about $482.50 of the asset. Funding the same $500 by bank transfer at no deposit charge and buying with a 0.40% taker fee costs $2, and you receive about $498 of the asset. The gateway cost roughly nine times more for the same purchase.

Why it matters when you buy

For a small or one-off purchase the funding method usually dominates every other cost, so choosing the rail matters more than choosing the venue. Compare deposit and trading costs side by side at the fee comparison, and check which methods are available where you live at the available-in pages.

Related terms

on ramp off ramp — the wider concept, instant buy — the product a gateway usually powers, spread — the hidden part of the quote, sepa — a cheap European rail, ach transfer — the United States equivalent, minimum deposit — the floor on each method.

Questions

Why does buying with a card cost so much more?

Card acquiring is expensive and carries reversal risk, so gateways price for it, and some card issuers add a cash advance charge on top. Bank rails carry neither cost.

Is the gateway the same company as my exchange?

Often not. Many wallets and smaller venues embed a third-party provider, which means a separate identity check and separate terms. The provider's name appears in the checkout flow.

Can I avoid the gateway entirely?

On a full exchange, yes: deposit currency by bank transfer and place an order on the book. That is almost always the cheapest route, at the cost of waiting for the transfer to settle.