Multi-currency payment gateways: the two words that cost you 2%

Presentment vs settlement, concretely

Say you're a UK business selling to Germany. The customer pays €100. With EUR settlement, €100 (minus fees) lands in your EUR account, and you decide if and when to convert. With auto-conversion, the gateway converts at its own rate and delivers pounds. That conversion is priced as the mid-market rate plus a markup of 1 to 2%, sometimes worse, and it's applied to your entire gross volume in that currency. A merchant doing €200,000 a month through auto-conversion at a 1.5% markup pays €3,000 a month for a conversion they may not have wanted, on top of processing fees. Most merchants discover this line only when they reconcile bank deposits against gateway reports and can't make the numbers meet.

What to ask any gateway

Which currencies can I settle in, not just price in? What's the conversion markup, as a number, in the contract? Can I hold balances per currency and convert on my own schedule? Is the markup different for refunds? That last one is a known trap: some gateways convert at one rate on the sale and a worse rate on the refund, so a same-day refund of a converted transaction costs you 2 to 4% of the ticket for nothing.

Also ask about like-for-like settlement requirements on your side: settling EUR to a EUR account means having a EUR account, which for high-risk businesses is its own project, since multi-currency business banking is exactly what banks are slowest to open for gambling, forex, CBD, and crypto companies.

Dynamic currency conversion: decline it

DCC is the checkout offer to charge a foreign customer in their home currency at a rate marked up 3 to 7%, with the gateway sharing the margin with you. It looks like free revenue. It reliably produces "I was overcharged" disputes and refund-rate damage that outruns the margin. If a gateway pushes DCC hard in the sales process, note what that says about how they make money.

The stablecoin route around the problem

There's a structural shortcut worth knowing about. A customer in any country paying in a dollar-pegged stablecoin produces dollar-denominated settlement with no FX conversion step at all: no markup, no per-currency bank accounts, no reconciliation gap between what the gateway reported and what the bank received. It doesn't cover card-preferring customers, but for merchants whose problem is collecting from many countries into one treasury, it's the cheapest multi-currency architecture that exists. That's how most international merchants use Flint: price locally, settle in stablecoins, and keep the FX decision (if any) on their side of the table.