Most corporate cards can be used internationally, but whether foreign transactions work automatically depends on the issuer—some require you to explicitly enable international use or notify travel plans, while others allow it by default but may block transactions for fraud prevention. Ramp cards work internationally by default and do not require enabling foreign transactions in advance.

For purchases made abroad, the card network (Visa or Mastercard) converts the foreign currency to USD using its daily exchange rate, typically based on the settlement date. A network assessment fee of about 1% may apply and issuers may add foreign transaction fees, bringing total costs to roughly 0–3.5% depending on the card.