How to Save for an International Trip (and Spend Less Once You're There)

International trips are expensive in two ways: the big costs you plan for — flights and accommodation — and the small leaks you don't, like card fees, poor exchange rates and impulse bookings. This guide covers both: a straightforward way to save the money in advance, and the habits that stop it from leaking away once you land.

Part 1: Saving the money

Start with a realistic total

Before you can save for a trip, you need a number. Build it from the parts rather than guessing:

Flights — check prices for your dates now, then add a margin; fares rarely get cheaper close to departure.
Accommodation — nightly rate × nights, plus cleaning fees and local tourist taxes, which are often shown only at checkout.
Daily spending — food, local transport and activities. A useful approach is to estimate a daily figure per person and multiply by days.
One-off costs — travel insurance, visas or entry authorizations, vaccinations, luggage, a phone plan or eSIM.
Buffer — 10% of everything above.

Use a sinking fund

A sinking fund is just a dedicated pot of money you add to on a schedule until you reach a target. The math is simple:

Monthly saving = (trip total − what you already have) ÷ months until you need to pay

Example: a trip costs $2,700. You have $300 set aside, and the big bookings need to be paid in eight months.

($2,700 − $300) ÷ 8 = $300 a month

Two details make sinking funds work:

Keep the money separate. Most banks let you open a second savings account or a named "pot" inside your main account. Money that sits in your everyday account tends to get spent.
Automate it. Schedule the transfer for the day after payday. Saving whatever is left at the end of the month rarely works; saving first and spending the rest does.

If your savings account pays interest, the fund will grow a little faster, but don't plan around it — over a few months, the interest on travel savings is small compared with what you contribute.

Find the money

If $300 a month sounds like a lot, look for it in recurring costs before cutting daily life:

Subscriptions. List every recurring charge on your statements. Most people find at least one or two they've forgotten about.
Insurance and phone plans. Annual re-quotes often find the same coverage for less.
Windfalls. Tax refunds, bonuses and gifts can go straight into the fund.

Book at the right time

Flights: for international routes, prices generally rise as departure approaches, especially in peak season. Set a price alert as soon as you know your dates.
Accommodation: free-cancellation rates cost a little more but let you lock something in early and rebook if a better option appears.
Shoulder season: the weeks just before and after peak season often have good weather, fewer crowds and noticeably lower prices for both flights and accommodation.

Part 2: Spending less once you're there

This is where many travelers lose money without noticing. None of these costs appear as a single big line item; they add a few percent to everything.

Foreign transaction fees

Many debit and credit cards charge a foreign transaction fee — commonly around 3% — on every purchase in a foreign currency. On a trip where you spend $2,000 on cards, that's $60 gone for nothing.

Fix: before you go, check your card's terms for "foreign transaction fee." If yours charges one, consider getting a card or account that doesn't. Many travel-oriented cards and app-based accounts don't charge one.

Dynamic currency conversion

When you pay by card abroad, terminals and ATMs often ask: "Pay in local currency or in your home currency?" Choosing your home currency feels safer because you see a familiar number — but the conversion is done by the merchant's provider, usually at a rate several percent worse than your card's own rate.

Fix: always choose to pay in the local currency. Your card network will do the conversion, usually at a much better rate.

ATM fees

Cash withdrawals can be charged twice: once by your bank and once by the ATM operator. Some ATMs also push dynamic currency conversion.

Fix: withdraw larger amounts less often to reduce fixed fees, decline the conversion offer, and check whether your bank refunds foreign ATM fees.

Airport currency exchange

Exchange counters at airports and tourist hubs typically have the widest spread between the buy and sell rates.

Fix: if you need local cash on arrival, withdraw a small amount from a bank ATM instead, declining the conversion offer.

How it adds up

Imagine spending $2,000 on a trip using a card with a 3% foreign transaction fee, accepting the home-currency conversion at a rate 4% worse than the card's rate, and making three ATM withdrawals with a $5 fee each:

Leak	Approximate cost
Foreign transaction fees (3%)	$60
Dynamic currency conversion (4% on half the spending)	$40
ATM fees (3 × $5)	$15
Total	$115

That's a nice dinner — or an extra night's accommodation — lost to avoidable fees.

Part 3: Saving as a group

Group trips add a coordination problem: everyone needs to save, and someone usually has to pay big deposits before the others have the money.

Agree on the budget first

Get everyone's comfortable maximum before booking anything, and plan to the lowest number. It's much easier to add optional upgrades for those who want them than to ask someone to stretch.

Set a shared timeline

Work backwards from when the money is needed. If the apartment deposit is due in four months and each person's share is $400, everyone needs to have saved $100 a month — and should know it from the start.

Record who has paid what

When one person books the apartment and another books the car, record each booking as an expense with the payer and the amount right away. A shared Splittly board keeps a live view of who has paid for what, so the people fronting large costs can see exactly what they're owed, and you can settle up whenever you choose — before the trip or at the end.

Choose one currency for the trip

If costs are paid in different currencies, agree on one currency for recording everything and how you'll convert (for example, the rate shown on the payer's card statement). It keeps the balances simple and avoids debates over a few cents.

Checklist

☐ Trip total built from flights, accommodation, daily spending, one-offs and a 10% buffer
☐ Separate savings pot with an automatic monthly transfer
☐ Price alerts set for flights
☐ Card checked for foreign transaction fees
☐ Plan to always pay in local currency
☐ For groups: budget agreed, timeline set, bookings recorded as they're paid

This article is general information, not financial advice. Fees and card terms vary by provider and country — check yours before you travel.