Which currency am I charged in, and can I change it?

Two currencies matter: your own billing currency, and your supplier's settlement currency. Which one an order charges depends on how you pay.

What does my billing currency control?

Your billing currency is set under Account → Organisation in the web portal and controls monthly invoices and everything billed to your organisation. You can change it yourself between the supported currencies (euro and US dollar). The only time a change is refused is while a monthly invoice cycle is accruing — the open cycle must finish in one currency first.

Why did a pay-now order charge a different currency?

Orders and credit bundles paid at checkout are charged in your supplier's settlement currency by default — the currency their payout account settles in. A supplier can switch this so that every buyer pays in their own currency instead; whether yours has depends on their setup. The order summary always names the exact currency before you confirm, and a note explains when the price is set by the supplier's currency.

Are prices converted between currencies?

No. Each currency has its own price list set by the supplier — a dollar price is a price, not a converted euro price. That is why the same stage can look different across currencies.

My account shows a currency I never chose

New accounts start in the currency that matches your country. If it is wrong, change it in account settings — and if the field is refused, check for an open monthly cycle first (see above).