Card currency conversion is the recalculation of a transaction from the merchant's currency into the card's currency, performed by the payment network at its own rate on the processing date, with a conversion fee or a cross-border fee that the issuer may add on top. That is why the final amount on the statement differs from the price you saw at checkout.
What the amount is made of
From the price tag to the statement
Authorization and clearing are different amounts
A transaction runs in two stages. First authorization: the merchant reserves the amount, the available balance drops, no money has moved yet. Then clearing — the actual charge, usually a day or two later and sometimes longer in certain categories. The rate applies on the processing date, not on the purchase date, so the amount can shift between the stages. This is also why the hold and the final statement entry sometimes differ slightly — normal behaviour rather than a double charge.
The payment network rate
When the checkout currency differs from the card currency, the conversion is done by the payment network — Visa or Mastercard — at a rate it updates on business days. That is neither a central bank rate nor a rate from a finance website: a difference of a fraction of a percent is normal. The rate applies to the whole transaction, including taxes and shipping if they were part of the same charge. Comparing a statement with a price tag is only meaningful once this conversion is taken into account.
Conversion and cross-border fees
On top of the rate the issuer may add two distinct charges: one for converting the currency and one for a cross-border transaction, when the merchant is registered in another country. The second appears even when the currencies match: a USD purchase from a merchant outside the issuer's country is still cross-border. The size depends on the card product. The practical conclusion is the same either way: with an exact balance the transaction hits the price plus those charges, which is why cards are loaded with headroom.
DCC: paying «in your card's currency»
Dynamic currency conversion (DCC) is an offer by the merchant or its gateway to charge you directly in your card's currency at their rate. It looks convenient: a familiar currency and an exact amount on screen. But the rate is then set by the merchant side and is typically worse than the network rate, while the issuer's own fee is not removed. When a checkout offers a currency choice, paying in the merchant's currency usually costs less.
Why the amount «grew» after payment
Several typical causes beyond the rate. The merchant may have authorized an estimated amount and charged the actual one — normal for services with a variable total. Taxes calculated on the merchant side after order confirmation may have been added. Finally, some merchants run a verification authorization when a card is linked, which is released later but looks like an extra charge at the time. Before treating a difference as an error, check the status: a hold or a completed transaction.
How to choose the card currency
The simplest way to remove conversion is to issue the card in the checkout currency. TrustVCC cards are issued in USD, EUR and GBP while the account balance is a single USD balance that funds them. If the checkout currency is known and stable — a subscription always billed in EUR, for example — a card in that currency removes the per-transaction recalculation. A rate between currencies still applies when the card is loaded from the USD balance, but it applies once, at a moment you control, rather than on every purchase.
How to budget for a transaction
Budget not for the price but for the amount that must be available on the card: the price, any conversion and cross-border fees, and headroom for a rate change between authorization and clearing. Card loads at TrustVCC start from $50, with the rate set by tier: 3% on Start, 2.5% on Pro and 2% on VIP. Surplus is not locked on the card: funds return to the balance at 0% from $70, so keeping headroom costs little.
Frequently asked questions
Why does the charged amount differ from the price on the site?
Between the checkout page and the statement the amount is converted at the payment network's rate on the processing date, and conversion and cross-border fees may be added. The rate applies at clearing rather than at the moment of purchase.
What should I choose when a checkout offers my card's currency?
That is DCC: the rate is set by the merchant side and is usually worse than the network rate, and it does not remove the issuer's fee. Paying in the merchant's currency is generally cheaper.
Why is more reserved on the card than the purchase costs?
Merchants with a variable total authorize an estimate and charge the actual amount, and some services run a separate verification authorization when a card is linked. The difference clears once the transaction settles or the hold expires.
How do I avoid conversion on a transaction?
Issue the card in the checkout currency: cards are available in USD, EUR and GBP. The per-purchase recalculation then does not happen, and a rate between currencies applies once, when the card is loaded from the USD balance.
Which rate is a transaction converted at?
At the payment network's rate on the processing date. It is updated on business days and differs from reference rates on finance websites, so a small gap against your own calculation is normal.