How to split a travel budget before it runs away

A travel budget does not blow up because of an expensive dinner. It blows up because the number you made at home included what you know and not what it costs, and because halfway through the trip there is no room left to decide.

The good news is that the three places where a budget breaks are few, and they can be closed before you leave.

1. Accommodation eats the budget

On any trip, accommodation is by far the biggest line: between half and two thirds of the total, depending on the destination. Any optimisation that does not touch that line is a tip-level optimisation.

The useful question is not "how much is the hotel", but "how many nights do I sleep and in which area". Same price, very different result: staying outside the centre can save a surprising amount and, in exchange, adds a transfer every day.

Do the maths backwards: take the total, subtract transport and food, and what is left is your real ceiling for accommodation per night. If that number does not appear in any hotel in the destination, the plan has to change, not the budget.

2. Transfers multiply

One transfer looks like a small line. The problem is that in a city with a train or a metro you pay per journey, and a plan with two outings a day turns that line into the second biggest item of the trip.

Two rules that work:

• Count transfers by day, not by trip. A day with four stops means more transfers than a day with two.
• Check the day ticket against the single ticket. In many cities the day ticket pays off from the third journey, and that changes the whole plan.

3. Small decisions add up

A coffee, an entrance, a taxi "just because it is ten minutes". None of them breaks a budget, but together they pay for a dinner.

The way to cover it is simple: keep a specific line in the budget for "what was not planned" and decide up front how much that is. Ten per cent of the total is a round, comfortable number. If there is some left at the end, even better: that is the line that lets you buy something you had not planned.

The sum that works

Do three sums and divide them:

1. Accommodation, by the real number of nights.
2. Transfers, by the number of days and journeys.
3. Food, with a minimum per person per day, on the rule that eating like a local costs a lot less than eating well every day.

If those three add up to a number you can afford, you have your budget. Everything else (entries, shopping, surprises) is bonus. And if you go over, the adjustment happens in accommodation, which is the line that matters most, not in food, which is the hardest one to argue about.

The right order

Budgeting before choosing the accommodation never works: you will always come up short. Budgeting after you have the dates does work, because the prices are real by then. Which is why the best order is dates, then accommodation, and only then the rest of the plan.