A cash machine in Lisbon dispenses euros against a British debit card, and the receipt shows a withdrawal of 200 euros plus a fee of 4.50 euros, plus a "conversion" line that quietly added another 6 euros before the notes even left the slot. The traveller paid roughly 5 percent for the privilege of holding cash. Nothing about that transaction was unusual. The fee schedule was printed on the machine, the exchange rate was posted, and the whole cost was disclosed in the way a casino discloses odds: technically, in small type, after the fact.
ATM costs abroad are rarely one charge. They arrive in layers, and each layer has its own set of habits that either suppress it or invite it. The seven habits below are the ones that consistently separate a cheap cash run from an expensive one. None requires special knowledge of banking. Most require only a decision made before the card goes in.
Refusing the machine's own conversion offer
Every foreign ATM that offers to convert a withdrawal into the cardholder's home currency is offering a bad deal dressed as convenience. The rate on screen typically runs several percentage points worse than the interbank rate, and the machine pockets the difference. The prompt looks helpful: "Withdraw in GBP? Yes / No." Yes is the expensive button.
The habit is to always decline and let the card's own network handle conversion. The withdrawal then settles at the issuing bank's rate, which is almost always closer to the real one. The difference on a 300 euro withdrawal can easily run to the price of a decent lunch. On a two-week trip with several withdrawals, it runs to a dinner.
One caveat belongs here: a few banks add their own foreign transaction fee, often around 3 percent, so the comparison is between the machine's markup and the bank's markup plus the network rate. The machine's markup is nearly always the larger of the two. Decline the offer, then check the bank's fee schedule once, at home, before the trip.
Withdrawing larger sums less often
Fixed fees punish small withdrawals disproportionately. A machine that charges a flat 3 euros to dispense cash takes 6 percent of a 50 euro withdrawal and 1.5 percent of a 200 euro one. The habit follows directly: take out more, less often. One larger withdrawal per several days beats a daily trip to the machine on pure arithmetic.
The counterweight is theft and loss. Carrying several hundred euros in a money belt or a zipped inner pocket is a different risk profile than carrying forty. The balance most experienced travellers strike is to withdraw enough for three or four days of ordinary spending, keep most of it out of sight, and top up before the supply runs low rather than after. The fixed fee gets diluted without turning the trip into a cash-security exercise.
Choosing bank branches over street-corner machines
The machines bolted to the wall of an actual bank branch tend to charge less than the freestanding ones in convenience stores, bars, and airport arrivals halls. Airport machines are the worst of the lot: captive audience, no competition, and a fee schedule set accordingly. A machine inside a bank lobby during opening hours is usually the cheapest option in any given town.
The habit is to plan cash runs around bank branches rather than grabbing the nearest machine. In practice this means a short walk, often to a main square or high street, and it means timing the withdrawal for daylight and opening hours. The saving per transaction is modest, a euro or two, but it compounds across a trip and it comes with a side benefit: bank branches tend to have better security and clearer fee disclosure than a machine in the back of a souvenir shop.
Knowing the card's own fee schedule before leaving home
Most of the cost of a foreign withdrawal is set by the issuing bank, not the machine. Some cards charge a flat fee per foreign ATM use plus a percentage of the amount. Some charge nothing at all and simply pass through the network rate. A few reimburse other banks' fees up to a monthly cap. The spread between the best and worst cards on the same withdrawal is large enough to pay for a meal.
The habit is to read the fee schedule once, before the trip, and write the numbers on a card or a phone note: flat fee, percentage, foreign transaction fee, monthly reimbursement cap. That note changes behaviour at the machine. A card with a 5 euro flat fee per withdrawal argues for larger, rarer withdrawals. A card with no fees argues for using it everywhere and leaving the backup card in the hotel safe.
Carrying two cards from different networks is the other half of this habit. When one machine rejects a card, or one network has an outage, the second card keeps the trip moving without a panicked visit to a currency exchange desk, which is the most expensive place in any airport.
Declining the "fast cash" preset amounts
Many machines offer preset buttons, usually round numbers like 100 or 200 in the local currency. These presets are convenient and they are also a nudge. The preset that matches the machine's own fee structure best is rarely the one a traveller would choose on reflection. A preset of 100 when the plan called for 150 forces either a second withdrawal, with its own fixed fee, or a shortfall later in the week.
The habit is to use the "other amount" option and type a number deliberately. It takes four extra seconds. It also avoids the trap of the machine that caps the preset at a low figure to encourage repeat visits. Typing the amount also makes the fee visible at the confirmation screen, where a preset sometimes skips past it.
Paying with card where the terminal is honest
Cash costs money to obtain. Card payments at a terminal often cost nothing beyond the bank's own foreign transaction fee, which many cards waive. In cities where contactless payment is standard, from Stockholm to Seoul, the cheapest cash strategy is to need very little cash at all. The habit is to default to card for ordinary purchases and reserve cash for the places that genuinely require it: market stalls, small cafés, taxis in some cities, tips.
The same conversion trap appears at card terminals, and the same answer applies. When a terminal offers to charge in the home currency, decline and pay in the local one. The terminal's rate is the machine's rate by another name. A traveller who declines at both the ATM and the till has closed the two most common leaks in the same trip.
There is a limit to this habit. Some countries remain cash economies for everyday spending, and a card-first approach there simply fails at the till. The point is to check which kind of place the trip is going to, not to impose card habits on a cash country.
Keeping a running tally of fees, not just spending
Most travellers track what they spend and ignore what the spending cost to access. A trip diary that records each withdrawal with its fee, its conversion choice, and the amount gives a running total of pure friction: money paid for the privilege of holding notes. On a two-week trip the figure is often larger than expected, and seeing it changes the next withdrawal.
The tally does something else. It exposes patterns. Three small withdrawals in four days, all from airport or convenience-store machines, all with conversion accepted, is a diagnosis. The fix is obvious once the pattern is visible: one branch withdrawal, conversion declined, amount doubled. A traveller who keeps the tally for the first few days of a trip usually stops needing it by the end, because the habits have formed and the fees have settled into a low, boring number.
The receipts themselves are worth keeping for a duller reason. A disputed fee or a double charge is far easier to recover with the slip in hand, and some banks require the receipt to process a claim. The tally and the receipts are the same habit wearing two hats: attention to the cost of cash, kept long enough to matter.
None of these seven habits is clever. Each is a small refusal or a small delay, made at the machine or before the trip. Together they turn a 5 percent cash habit into something closer to 1 percent, and the difference shows up not as a dramatic saving but as a trip that ends with more of its budget spent on the trip itself.