How I Budget a Year of Travel Before I Book Anything
Most travel budgeting happens after the decision, which means it is not budgeting, it is justification.
The annual number comes first
I decide what the year can carry before I decide where I am going. That single reordering removes most of the pressure from every subsequent decision, because the question stops being whether I can afford a trip and becomes which trips fit the number.
The number is not a target to spend. It is a ceiling, and it includes everything: transport, accommodation, food above what I would eat at home, insurance, visas, gear replacement and the equipment that eventually breaks. Leaving categories out is how people end up over.
Then it gets divided across the destinations on the plan, weighted by how long each trip is and how expensive the destination genuinely is rather than how expensive it feels.
Four lines per trip, not forty
Getting there. Sleeping. Eating and moving around locally. Everything else. That is the whole structure, and the reason it is only four lines is that a more detailed forecast is not more accurate, it is just more work to maintain and more satisfying to build than to use.
The last line is the one that matters. Everything else is the part people remember to include, and the fourth line is where the tickets, the day trips, the replacement charger and the unplanned second night quietly live. I set it at around a fifth of the total and I have never regretted it.
Long trips get a per-day figure rather than a total, because five weeks in one country behaves differently to twelve days in a city and mixing the two makes both estimates worse.
The only number worth reviewing afterwards
When I get back, I do not check whether I came in under. I check the gap between what I estimated and what I actually spent, line by line, and I look at which line was furthest out.
Coming in well under budget is not a success. It usually means the estimate was lazy, and a lazy estimate that happens to be generous will be a lazy estimate that is not generous on the next trip.
Six years of doing this has made my forecasts genuinely accurate, which is the actual point. Not to spend less, but to know beforehand what a trip will cost, so the decision to take it is made honestly.