How to Plan a Trip Budget That Survives the Trip

Quick answer

Budget bottom-up, not top-down: price the flight, then a nightly rate, then a per-day figure for food, local transport and attractions, then add the one-off items people forget — travel insurance, visa or entry fee, eSIM data, airport transfers and a 10% buffer. The forgotten items typically add 8-15% to a short international trip.

The seven lines every budget needs

Per-day figures vary enormously by country. Compare a low-cost city with a high-cost one before you commit: Bangkok travel cost against London travel cost, or Maldives travel cost against Brazil travel cost. All figures on those pages are estimates — confirm current prices before booking.

Travellers change the maths differently

Costs do not scale evenly. Accommodation is mostly per room, food and attractions are per person, and children often pay reduced or zero entry. A family of four is rarely four times a solo budget; it is usually closer to two and a half times, unless you need two rooms.

Where the money actually goes

• Flights and stays dominate. Moving dates by a few days, or a base by two metro stops, moves more money than any daily saving.
• Food is where budgets quietly break. Set a per-day allowance and decide in advance which meals are the splurges.
• Attractions add up fast in Europe and Japan; city passes only pay off if you genuinely visit three or more paid sights per day.
• Transfers on arrival and departure are often the single most overpriced purchase of a trip. Check the transport guide style pages for airport options.

Do not skip the one-off items

Travel insurance, a visa or electronic entry authorisation where required, and a data eSIM are small next to a flight but they are real. Price them per person and put them in the budget rather than on the credit card at the airport.

Build a 10% buffer and treat it as spent

The buffer covers a missed train, a rainy-day taxi, a medical pharmacy run or a better dinner. If you finish the trip with it intact, that is a bonus, not a plan.

Cutting costs without cutting the trip

• Shift the dates into a shoulder month; check what that month feels like first, for example Kyoto weather by month.
• Stay in one base longer instead of moving hotels every two nights.
• Eat where the queue is local at lunchtime and cook or picnic once.
• Buy transport tickets in the local app rather than at tourist counters.
• Cut one paid attraction per day and add one free neighbourhood walk.

Common mistakes

• Budgeting for the flight and hotel only.
• Using a single "daily spend" figure for every country.
• Forgetting airport transfers at both ends.
• Ignoring currency conversion and card fees.
• No buffer, so overruns feel like failures.
• Booking a cheap hotel that costs an hour of transport a day.

Plan your trip

Journey Planner produces a cost breakdown alongside your day-by-day plan — accommodation, food, transport, attractions, insurance, visa and eSIM estimates, adjusted for the number of adults and children and the length of stay, with a PDF export.