Never choose this ATM option abroad: The currency conversion trap

You are standing at an ATM in another country, trying to withdraw cash before a taxi arrives.

The machine offers two choices:

Withdraw 20,000 HUF with conversion

or

Continue without conversion

One option displays the exact amount that will be charged in your home currency. The other leaves the final conversion to your card issuer.

The first option looks safer. It gives you a familiar number, promises a “guaranteed exchange rate” and may even warn that choosing the other button means the rate is unknown.

That convenience has a name: dynamic currency conversion, or DCC.

And it can make an ordinary cash withdrawal significantly more expensive.

Visa describes DCC as a service that lets a merchant or ATM convert a foreign transaction into the cardholder’s home currency at the point of payment. When it is offered, the screen should show the amount in both currencies, the exchange rate and any additional markup or fees.

The important question is not whether the ATM can perform the conversion.

It is who gets to choose the exchange rate.

What happens when you accept the ATM’s conversion

When you withdraw money abroad, the ATM normally dispenses the local currency.

If you choose to continue in that local currency, the transaction is sent through the card network and converted according to the arrangements between the card network and your bank. Your card issuer may still charge a foreign-exchange fee, an overseas cash-withdrawal fee or both.

If you accept DCC, the ATM operator or its conversion provider performs the currency conversion immediately. Mastercard explains that when a retailer or ATM operator converts the transaction, Mastercard’s currency-conversion rate does not apply. This commonly happens when the cardholder chooses to be charged in the currency of the card rather than the local currency of the ATM.

In practical terms:

• Local currency: your bank or card network handles the conversion.
• Home currency: the ATM’s DCC provider handles the conversion.

The second option gives the ATM operator control over the rate presented to you.

The Fintayo example: how a small rate difference becomes a real cost

Consider a traveler with a euro-denominated card withdrawing Polish złoty.

This is an illustrative example, not a current market quote.

Both transactions produce exactly the same PLN 1,000 in cash.

But the DCC option charges €250 instead of €235.29. That is €14.71 more before considering any separate ATM or bank fees.

Expressed against the lower converted amount, the difference is approximately 6.25%.

The ATM does not need to display a separate line saying “you are paying €14.71 extra.” The cost can be embedded in the exchange rate itself.

That is why a screen showing “0% commission” does not automatically mean that the conversion is inexpensive. A provider can advertise no separate commission while still using an unfavourable exchange rate.

The ATM may charge you in three different ways

Travelers often treat every extra cost as a single “ATM fee,” but three separate price layers can exist.

1. ATM operator fee

This is the charge imposed by the company or bank that owns the cash machine.

It may appear as:

That fee can exist whether you accept or decline currency conversion.

2. Dynamic currency conversion markup

This is the difference created by the exchange rate offered by the ATM’s DCC provider.

It may be displayed as a percentage markup, incorporated into the quoted rate or presented through a total amount in your home currency.

3. Your card issuer’s charges

Your own bank may impose an overseas cash-withdrawal fee, a foreign-currency transaction charge or both. Mastercard’s currency calculator notes that a card issuer may apply additional charges and may not necessarily use Mastercard’s indicated rate when billing the customer.

Declining DCC therefore does not guarantee a fee-free withdrawal.

It simply prevents the ATM operator from performing the currency conversion for you.

Which button should you press?

For most travelers, the practical rule is:

Choose the local currency and decline the ATM’s conversion.

That may appear on the screen as:

The wording is not standardized across every country or ATM network.

Some machines use a red button for declining conversion and a green button for accepting it. Others make the DCC option larger, place it first or display warnings beside the local-currency choice.

Do not make the decision based on the button’s color.

Look at the currency code.

When withdrawing cash in Poland, the local currency is PLN. In Hungary, it is HUF. In Croatia, France, Germany, Italy and other euro-area destinations, it is EUR.

The currency dispensed by the ATM is generally the currency you want the machine to charge.

“Without conversion” does not mean the transaction will not be converted

This is one of the most confusing parts of the ATM screen.

When you select “without conversion,” the transaction may still need to be converted into the currency of your card account.

The phrase means:

The ATM will not perform the conversion.

Your bank or card network may perform it later instead.

Visa and Mastercard both provide tools that can give cardholders an indication of the network conversion rate. The final amount can still vary because of timing, issuer pricing and additional fees.

So the choice is not:

• conversion, or
• no conversion

The real choice is:

• conversion by the ATM provider, or
• conversion through your card arrangement

Can DCC ever be cheaper?

It is theoretically possible for a displayed DCC rate to be competitive with the complete cost charged by a particular bank.

For example, a card issuer may impose unusually high foreign-currency or overseas withdrawal fees. A traveler may also value knowing the exact home-currency amount immediately.

But that does not make DCC automatically better.

A valid comparison would require checking:

1. the ATM’s exchange rate and markup
2. the operator’s separate withdrawal fee
3. your bank’s network conversion method
4. your bank’s foreign-currency charge
5. your bank’s cash-withdrawal fee

Most travelers do not have all five figures available while standing at an ATM.

That is why choosing the local currency is usually the more defensible default. Mastercard’s consumer guidance likewise advises cardholders to decline the conversion option and allow their own bank to perform the currency conversion.

The word usually matters. The final cost depends on the card and account being used.

European ATMs must provide more transparency

Within the European Union, rules on cross-border payments require greater transparency when currency-conversion services are offered at an ATM or point of sale.

Providers offering DCC for covered transactions must present the currency-conversion charge as a percentage markup over the latest available European Central Bank reference exchange rate. The information must be shown before the customer authorizes the transaction.

This allows a traveler to see information such as:

That percentage is more useful than a vague statement such as “guaranteed rate.”

But transparency does not mean the offer is inexpensive.

It only means the additional cost should be easier to identify.

A clearly disclosed 9% markup is still a 9% markup.

A better ATM routine abroad

The best time to understand your travel-card costs is before you reach the airport.

Open your bank’s price list or mobile app and check:

• foreign-currency card transaction fee
• overseas ATM withdrawal fee
• minimum cash-withdrawal charge
• daily withdrawal limit
• whether certain ATM networks are cheaper
• whether your account refunds operator fees
• whether your card uses Visa, Mastercard or another conversion arrangement

At the ATM:

1. Confirm that the machine belongs to a recognizable bank or established network.
2. Check the local withdrawal fee before proceeding.
3. Select the amount in local currency.
4. Decline conversion into your home currency.
5. Read the final confirmation screen before entering your PIN or confirming.
6. Keep or photograph the receipt.
7. Review the transaction in your banking app.

Cancel the withdrawal if the operator fee is excessive. Trying another ATM can be cheaper, particularly when the machine is located inside or beside a bank branch.

One large withdrawal or several smaller ones?

Suppose an ATM charges a fixed €5 operator fee per withdrawal.

Three withdrawals result in €15 of operator fees. One larger withdrawal results in €5.

From a fee perspective, fewer withdrawals can be cheaper.

But withdrawing a large amount creates other risks:

• carrying more cash
• theft or loss
• local ATM limits
• your bank’s daily limit
• the possibility of the machine failing to dispense the correct amount

The optimal withdrawal is not necessarily the maximum available. It is an amount that balances fixed fees against the security risk of carrying cash.

Also avoid withdrawing more money solely because the ATM suggests a large preset amount. Preset buttons are convenient for the operator, not necessarily for your travel budget.

What if you accepted DCC by mistake?

Once the ATM transaction has been completed and the cash has been dispensed, reversing it may be difficult.

Keep the receipt and take screenshots from your banking app. The receipt should ideally show:

• the amount of local currency withdrawn
• the amount charged in your home currency
• the exchange rate
• any DCC markup
• the ATM fee
• the ATM operator

Contact your card issuer if:

• the ATM did not clearly offer a choice
• conversion was applied after you selected local currency
• the displayed rate or amount differs from the final charge
• the machine dispensed no cash or the wrong amount
• you suspect an unauthorized or duplicated transaction

Visa requires participating merchants and ATMs offering DCC to disclose the local and home-currency amounts, currency symbols, exchange rate and relevant markup or fees.

A poor exchange rate that was properly shown and accepted is not necessarily treated the same as an unauthorized conversion. The available dispute route depends on the facts, the card scheme’s rules and your issuer’s assessment.

The Fintayo three-second rule

When an ATM abroad asks how you want to be charged, ignore the emotional wording and ask three questions:

What currency will I receive?
That is normally the local currency.

What currency is the ATM offering to charge?
If it is your home currency, that is likely DCC.

Who do I want setting the rate?
Unless you have verified that the ATM offer is genuinely better, choose the local currency and let your card arrangement handle the conversion.

The decision takes three seconds once you know what to look for.

The Fintayo takeaway

The currency-conversion trap works because certainty feels valuable.

The ATM shows an exact home-currency amount. It may promise a guaranteed rate and warn that the alternative is unknown.

But the familiar amount does not tell you whether the rate is competitive.

When withdrawing cash abroad:

• select the local currency
• decline the ATM’s conversion
• check the operator fee separately
• understand your own bank’s charges
• compare the complete cost, not a single screen message

The safest default is not “accept the rate so there are no surprises.”

It is:

Take the local cash in the local currency.

The ATM can dispense the money.

It does not also need to choose your exchange rate.

Important: Card pricing, ATM fees, exchange rates and conversion rules vary by issuer, country and operator. Check your card’s current tariff and the information displayed by the ATM before confirming a withdrawal.