The foreign exchange fee decides most of it
Every purchase abroad is converted into your home currency, and the card issuer can add a fee on top of that conversion. It is the first thing to sort out, because every other cost sits around it. Start at the top of our no foreign transaction fee cards list and work back from there.
A worked example: ACB Grenada Bank charges a foreign exchange fee of 1%, while 1st National Bank Saint Lucia charges 2%. Spend the same amount abroad on both and the second card costs you more, and the gap repeats on every single payment you make.
Cards that add nothing to the conversion
The strongest result is a card that charges no foreign exchange fee at all. The Advcash (Advanced Cash) Card lists one of 0%, and Alior lists 0%. Both suit a traveller who pays mostly in card and rarely thinks about the exchange rate again.
American Express Business Cards also show 0% and run on their own network, which fits someone already settled inside that network. The trade-off applies to all three: a card that adds nothing to the conversion can still carry account costs at home, so read what the account charges before you commit, and check the card suits how you bank rather than assuming.
The middle of the range
Airwallex keeps its fee at 0.5%, which fits frequent cross-border business spending on a Visa card. The trade-off is that the low figure is the whole reason to pick it, so anything charged outside the conversion needs checking separately.
Ahlibank Qatar charges 2.5% and Alpha Bank Cyprus charges 2.7% on a Mastercard card. Access Bank Zambia Premium Elite sits at 5%, the highest of the cards here, and suits a spender who values the wider cash and acceptance reach over the fee.
Alchemy Pay charges 3.99% on a Mastercard card, aimed at moving value between accounts rather than paying for goods in a single market.
Cash abroad: read the free allowance in its own currency
Cash is where travel costs climb fastest, because the machine operator sets a charge of their own on top of whatever the card charges you. Look for the free allowance on withdrawals, and note the currency it is set in before you compare anything.
Aion Bank offers a free allowance of €300, ALAT by Wema offers NGN 150,000 and Altyn-i offers KZT 1,000,000. Each figure sits in the currency of its own market, so you need to convert before one can be weighed against another.
At the other end of this group, ACB Grenada Bank shows a free allowance of XCD 0. Plan on paying for each withdrawal there, or take enough out in one visit that the charges do not stack.
The network the card runs on
A foreign exchange fee answers only part of the question, because the card also has to be accepted where you land. Read the network as a map of where the card works rather than a technical detail.
AikBank lists a local network, which points to domestic use rather than a trip abroad. Airwallex runs on Visa, and Alchemy Pay, Alpha Bank Cyprus and Altyn-i run on Mastercard, which widens where those cards are accepted.
How the account works
The account type changes what a fee means to you. A business card bills a company, a prepaid card is loaded before you spend, and a virtual card is used on a screen, so two cards with the same rate can leave you in very different positions.
ABN AMRO NL Zakelijk is a business card, and its foreign exchange fee of 2.5% sits in the middle of the group. Ask yourself who pays the bill and how the balance is funded before comparing rates, because that decision changes which rate matters.
A fixed order for comparing
Work through the same four checks every time: the foreign exchange fee, the free cash allowance and its currency, the network, then how the account is funded and whether it is personal, business or prepaid.
Our debit card rankings follow that order, and the individual reviews record the same fields for each card, so you can line two cards up side by side. Only once those four pass is it worth looking at anything else.