What is dynamic currency conversion (DCC)?

It is when a foreign merchant offers to charge you in your home currency instead of the local one. The rate used is almost always worse than your card’s, so decline it and pay in the local currency instead.

What is a typical card foreign-transaction fee?

Many cards charge 2–3% per foreign transaction; some travel cards charge 0%. Check your card’s terms. A 0% FX card with the mid-market rate is usually the cheapest way to pay abroad.

Is cash ever cheaper?

Rarely, unless you already hold the foreign currency or can exchange it at the mid-market rate. Exchange bureau markups of 3–8% usually exceed card fees, and cash carries theft risk and leftover-currency waste.

What is dynamic currency conversion and should I use it?

DCC is when a foreign merchant or ATM offers to charge you in your home currency instead of the local one. The rate is almost always worse than your card’s, so decline it and pay in the local currency. This calculator does not model DCC because you should simply avoid it.

Is a 0% FX card always cheapest?

Usually, yes — a card with no foreign-transaction fee using the mid-market rate is the cheapest way to pay abroad. Cash bought at an exchange bureau rarely beats it unless you already hold the foreign currency at a good rate.

Money & Travel Calculators

Cash vs Card Abroad Fees Calculator

When you pay for something abroad, the method you choose changes the real cost. Cash bought from an exchange bureau usually carries a rate markup; a card payment may add a foreign-transaction fee but use a better rate. This calculator compares both so you can pick the cheaper option for each purchase.

Enter the purchase amount in the local currency, the cash exchange markup percentage, and your card’s foreign-transaction fee percentage (and any fixed fee). The calculator shows the home-currency cost of each method and which is cheaper. Dynamic currency conversion — letting a merchant charge you in your home currency — is almost always worse and is not modelled here.

It is the checkout decision made concrete — the calculation that tells you, for the purchase in front of you, whether to reach for the cash in your wallet or the card in your pocket.

Purchase (local currency)

Mid-market rate (local → home)

Cash exchange markup%

Card FX fee%

Card fixed fee

Currency

Enter your values to see the result.

How this is calculated

The calculator compares two ways to pay for a foreign-currency purchase. Paying cash means you bought that currency at an exchange bureau carrying a markup, so the effective rate is the mid-market rate reduced by the cash markup percentage; the cash cost is the purchase amount times that reduced rate. Paying card means the card network converts at close to the mid-market rate but adds a foreign-transaction fee percentage and possibly a fixed fee; the card cost is the purchase amount times the mid-market rate times (1 plus the card fee), plus any fixed fee.

Whichever method has the lower home-currency cost is cheaper, and the calculator flags it. The model assumes the card uses approximately the mid-market rate, which is true for most card networks; a few cards add a markup on top of the stated fee, which would make the card costlier than shown here.

The model does not cover dynamic currency conversion (DCC), where a foreign merchant offers to charge you in your home currency. DCC rates are almost always worse than your card’s, so you should decline it and pay in the local currency regardless of what this calculator says. It also does not account for cash left over at the end of a trip, which is effectively wasted unless you convert it back at another markup.

Worked example

A €200 purchase. Mid-market rate 1.08, cash markup 5%, card FX fee 2%, no card fixed fee.

1Cash rate = 1.08 × 0.95 = 1.026; cash cost = 200 × 1.026 = $205.20.
2Card cost = 200 × 1.08 × 1.02 = $220.32.
3Cash is cheaper by $15.12 in this case — but only because the card fee is high.

Frequently asked questions

What is dynamic currency conversion (DCC)?: It is when a foreign merchant offers to charge you in your home currency instead of the local one. The rate used is almost always worse than your card’s, so decline it and pay in the local currency instead.
What is a typical card foreign-transaction fee?: Many cards charge 2–3% per foreign transaction; some travel cards charge 0%. Check your card’s terms. A 0% FX card with the mid-market rate is usually the cheapest way to pay abroad.
Is cash ever cheaper?: Rarely, unless you already hold the foreign currency or can exchange it at the mid-market rate. Exchange bureau markups of 3–8% usually exceed card fees, and cash carries theft risk and leftover-currency waste.
What is dynamic currency conversion and should I use it?: DCC is when a foreign merchant or ATM offers to charge you in your home currency instead of the local one. The rate is almost always worse than your card’s, so decline it and pay in the local currency. This calculator does not model DCC because you should simply avoid it.
Is a 0% FX card always cheapest?: Usually, yes — a card with no foreign-transaction fee using the mid-market rate is the cheapest way to pay abroad. Cash bought at an exchange bureau rarely beats it unless you already hold the foreign currency at a good rate.

Related calculators

Method: cash cost at mid-market rate reduced by cash markup; card cost at mid-market rate plus card FX fee and any fixed fee. Mid-market rates on this site are sourced from open.er-api.com. Last updated: September 2026.

These results are indicative estimates for planning only and do not constitute financial advice. Exchange rates, tax rules, customs allowances and tipping customs vary by country, provider and over time. Always confirm figures with your bank, the relevant authority or a qualified adviser before acting on a calculation.