How much cash to carry abroad: too little strands you, too much is a risk Cash or card abroad, and how to split it by destination

01Step one: is your destination a "cash place"?

Every ratio starts here. Fly to Tokyo and fly to Bali, and cash plays a completely different role in each. How do you tell which is which? Before you go, spend ten minutes looking at a few things: when locals buy a coffee or hop a short ride, do they reach for cash or for a card and a phone? Do the street stalls, the produce market and the night market take cards at all? Do taxis and small transport let you tap? If the answer to most of those is cash, you're going to a cash place. If even the roadside vendor has a QR code and a card reader taped to the counter, you're going to a card place.

You don't need to be precise. This step only sets the big direction: should cash be the workhorse, or just a backup? Getting it wrong is not cheap. Treat a card place like a cash place and you've changed a wad of notes that lose value and carry risk for nothing. Treat a cash place like a card place and you'll be stuck and awkward at exactly the stall you most wanted to buy from.

02Which job cash does, which job the card does

Once the big direction is set, give cash and card each their own turf. They aren't rivals competing for the same spend. They're a division of labour.

Read this table and you'll stop agonising over "should I bring cash at all." You should, but only the amount the cash jobs actually need, not "more equals safer." Whatever the card can handle, hand it to the card.

03How much cash: a starting ratio

There's no single number that fits everyone, but there's a starting line of thinking you can adjust: estimate a share by destination type, then map it onto your real spending.

• Card places (developed cities, cards work everywhere): keep cash at maybe 10–20% of your budget, enough for the odd cash-only shop and an emergency.
• Mixed places (cards work, but small-ticket moments are everywhere): cash around 30–40%, carrying the markets, the transport and the little food spends.
• Cash places (shops, markets and transport mostly take cash): cash might be half or more, but that does not mean changing and carrying it all at once. Change in batches, withdraw in batches; more on that below.

Then layer on one common-sense correction: the shorter the trip and the bigger the group (costs get shared), the less cash you need; the further you go into the countryside, the islands and small towns, the more you nudge the cash share up. These are only starting numbers. A day or two in, once you have a feel for how the place actually pays, adjust on the fly.

04Where to change it without losing out

The same money, changed in different places, lands you a noticeably different amount. The cost here isn't in a posted commission. It's in the buy/sell spread. The airport counter usually has the wildest spread of all, and it loves to advertise "no commission," because commission was never how it made its money.

The cheaper move is to layer it. Before you go, change a small amount at your home bank, enough to land and function: a taxi from the airport, the first meal, a transit card. Change the rest at your destination, at a proper exchange in town or by withdrawing at an ATM with your card, where the spread is usually kinder. Whatever you do, don't take the lazy route and change everything at the airport counter, because that maxes out the most expensive spread there is. The piece on timing your exchange breaks down which moments cost the most.

If you're a card-first traveller who only wants a little cash as a backstop, just withdraw a lump after you land from a bank's own ATM and skip changing money at home altogether. Withdrawing has its own stack of fees, and the ATM piece shows how to set your withdrawal count and amount to keep it cheap.

05Keeping cash safe, and splitting it up

Cash's biggest weakness isn't that it's expensive. It's that once it's gone, it's gone. So carrying cash is half a question of ratio and half a question of where you put it. One simple rule: don't keep all your cash in one place.

• Split it three ways: a small amount on you (what you'll spend today), a portion in your bag, and the larger reserve in your luggage or hotel safe. One thing goes wrong and you don't lose everything.
• Keep big notes and small notes apart. Small notes stay easy to reach; big notes stay buried, so you never flash a wad at a stall.
• Hold a little small-denomination local currency for emergencies: a taxi, a tip, a sudden cash-only moment.
• Remember one line: in crowds, night markets and packed places, keep your wallet in front, close to your body, and never in a back pocket.

Splitting it up isn't a hassle. It's leaving yourself room to "lose one stash" and still be fine. The more you carry, the more spread out it should be.

06Three trips, three worked ratios

Map the judgement above onto three common trips, and here's a starting ratio you can copy and tweak.

Tokyo, 5 days (cards work well, cash still needed now and then)

Run a card with a good rate as your workhorse, and keep cash at 10–20%. A little change handles the occasional cash-only old shop, a small shrine, the odd vending machine, and that's plenty. Don't change a fat stack of yen back home "just in case."

Bali / Southeast Asian islands (cash place, few card terminals)

Cash is the workhorse here, maybe over half. But change in batches, withdraw in batches; don't empty it all at the airport. A proper exchange in town gives a better spread, and splitting it across a few visits also spreads your risk. The hotel, the island-hopping tour fee, anything that takes a card or a transfer, still send to the card where you can.

Multi-country Europe, 2 weeks (mixed, multiple currencies)

The card leads (a multi-currency card especially earns its place), with cash around 20–30% for small shops, churches, markets and tips. Crossing between euro and non-euro countries, don't change up every country's cash in advance; change or withdraw a small amount locally as you go, so you don't over-change and end up converting back. The leftover-currency piece will come in handy here.

07A quick check before you carry cash

Run through this once before you leave and you'll rarely get the split wrong:

• Is the destination a cash place or a card place? Did I actually check how locals pay for small things?
• Roughly what share of my budget is cash? Did I estimate it from "daily small spends × days + emergency," or just guess?
• Did I only change a little at home (enough to land) and leave the rest to change or withdraw locally?
• Is the cash split across a few places? Are big and small notes kept apart?
• Have I confirmed my main card works at the destination, has no steep conversion fee, and do I know to pick local currency at the till?

Walk through those five and the cash-card division is clear. For a full travel-wallet review, see the 20-minutes-before-you-leave checklist.

08The splits people get wrong most

09When to change your mind on the ground

10Common questions

11What to read next

Update note: First published 2026-06-19. The shares and amounts here are illustrative, to aid understanding, not recommended figures; actual exchange spreads, fees and whether cards are accepted follow the live situation at each bank, issuer and local merchant.
Sources: publicly posted bank exchange boards and overseas-transaction fee notes, publicly available payment-habit data for each destination, and the author's years of first-hand records using cash and card side by side across different countries.