Which Category Does It Belong In? Seven Rules for Sorting Travel Spending

Open the expense log from your last holiday and look at the line that says "Other". For most people it is the biggest line they cannot explain. It is not that the money was spent on nothing. It is that, at the moment of paying, nobody had a rule for where a hotel breakfast, an airport sandwich or a mandatory resort charge should go, so it went wherever was fastest.

Sorting is the part of recording travel spending that looks trivial and is not. The categories decide which question your totals can answer later. "How much did Lisbon cost?" needs no categories at all. "Was Lisbon expensive because of the flights or because of the food?" needs them, and needs them to have been applied the same way on every trip. A total that was sorted differently each time cannot be compared with the next one.

This article gives you seven sorting rules for the ambiguous cases, a short test for whether a category is doing its job, and a way to review a finished trip in about five minutes.

Why a small number of rules beats a big list

Most travel budgeting advice lists categories: food, transport, lodging, activities, shopping. That list is fine and it handles roughly four out of five purchases without any thought. The trouble is the remaining fifth. Every trip produces a handful of purchases that fit two categories equally well, and the choice you make for each one is where inconsistency creeps in.

Consistency matters more than precision. If you always put the airport taxi under transport, your transport total is a true measure of how much you spent getting around. If you put it under transport on one trip and under "arrival costs" on the next, neither total means anything when set beside the other. A slightly imperfect rule applied every time beats a perfect judgement made fresh each time.

So the goal is not to invent the ideal category scheme. It is to settle the ambiguous cases once, write the decisions down, and stop deliberating at the till.

Rule 1: Categorise by the reason you paid, not by the shop

A cafe inside a museum is a food purchase. A pharmacy at the airport selling a phone charger is a gadget purchase, not healthcare. The place that took your money is a poor guide, because many places sell several kinds of thing. Ask what you were buying and why.

This is the rule that does the most work. Hotels in particular sell lodging, breakfast, parking, laundry and a minibar, and a single receipt may contain all five. If the receipt is itemised, split it. If it is not, use the largest component and move on.

Rule 2: Anything that only exists because of a trip goes under its own heading

Visas, travel insurance, a local SIM card or a data pass, and vaccination appointments exist because you are leaving. They are not part of the cost of being somewhere, and they are often paid before or after the trip rather than during it. Gathering them under a distinct heading answers a question people often get wrong: what does a trip cost before I have bought a single meal?

MapMyWorld's default list reflects this. It has separate entries for Visas & Documentation, Travel Insurance and Phone & Data rather than folding them into "Other" (the full list is defined in shared/schema.ts). Whatever tool you use, the point stands: if it is a fixed cost of going, keep it apart from the daily cost of being there.

Rule 3: Fees follow the thing they were added to

A bank's foreign transaction fee, a booking fee and a baggage charge are all costs that attached themselves to something else. The temptation is to pool them in a "fees" bucket. Resist that for fees you can tie to a purchase, because the fee is part of what that purchase cost.

A checked-bag charge belongs with the flight. A booking fee belongs with the hotel. The exception is a fee with no parent: a cash withdrawal charge or a currency exchange commission is a cost of moving money, not of buying anything, so it earns its own entry. A "Fees & Exchanges" heading is the right home for those.

Currency conversion deserves a note of its own. If a card terminal abroad offers to charge you in your home currency instead of the local one, that is called dynamic currency conversion, and the rate it applies is typically worse than the market rate. Visa describes the practice and explains that you can choose to pay in the local currency. When it happens anyway, the extra you paid is a fee. It does not change the category of the dinner, but it is worth noticing that the dinner cost more than the menu said. The companion article on which exchange rate to use when you record spending covers how to record the amount itself.

Rule 4: Mandatory charges at the destination go with lodging

Resort fees, cleaning fees and city or tourist taxes are charged because you stayed somewhere. They are lodging costs even when they appear as a separate line, even when they are paid at the desk on departure rather than at booking, and even when the room rate was advertised without them.

This has become easier to see. Since 12 May 2025, hotels and other short-term lodging in the United States have had to show the total price including mandatory fees up front, under rules from the Federal Trade Commission. Whether or not you travel there, the principle is the useful one: the real price of a night is the room rate plus everything compulsory. Put it all under accommodation and your nightly cost will match what you actually handed over.

Rule 5: Tips go with the service, unless they are large enough to matter on their own

A ten percent tip on a meal is part of the meal. A tip for a guide or a driver is part of the tour or the transfer. Pooling every tip into one heading hides the fact that, in some countries, tipping is a considerable share of what a day costs.

The practical test: if all your tips on a trip together are less than about two percent of the total, fold them into their parent purchases and do not think about it again. If you are travelling somewhere tipping is routinely expected on every transaction, give tips their own entry for that trip so you can see how much they add. Either way, decide before you leave, not at each restaurant table.

Rule 6: Split a shared cost only if you will remember the split

Dinner for four, paid on your card, with three people paying you back later. What goes into the log: the full bill or your quarter?

The answer that survives time is your share, because the question the log answers is what the trip cost you. Record the full amount only if you also record the repayments, and in practice repayments are exactly what people forget. If you paid the whole bill and have not yet been repaid, put the full amount in the description of the entry along with the word "shared", and log your portion as the amount. When you look back in a year the description explains why a dinner for four seems cheap.

Rule 7: When two categories fit, pick the one you would search for

Some purchases truly are both. A train ticket to a day trip is transport and it is also an activity. A cooking class is entertainment and it is also food. Do not agonise; ask which heading you would open if you were trying to find this entry again in two years. Most people look for the train ticket under trains and the cooking class under activities, because that is the word they remember. Choose that, and write the other half of the story in the description.

A quick test for whether a category is working

Add up the entries in a category after a trip and ask two questions.

First, does the total change a decision? If "Laundry" came to the price of a coffee, it is not earning a place in your summary. Merge it into something larger next time. A category should exist because its total might change what you do on the next trip.

Second, could a stranger tell what is inside it? "Other" fails this test almost by definition. As a rough guide, if "Other" is more than about one tenth of a trip's spending, you have been using it as a place to avoid a decision, and it is time to apply the rules above to its contents.

MapMyWorld ships 27 default expense categories in eight groups: food and dining, accommodation, transportation, activities, shopping, essential services, travel admin and fees, and a final "Other" (defined in shared/schema.ts). That is more than most trips need. The list is there so that you rarely have to reach for "Other", not as a suggestion to use all 27. On a typical week away you will probably use eight to twelve of them, and that is a healthy number.

The five-minute review

When a trip ends, set aside five minutes and do this once.

1. Open the category breakdown for the trip. MapMyWorld shows spending by category as a chart on the expense stats page, and names your top category (client/src/pages/expense-stats.tsx). Any tool with a category pie will do.
2. Look at the biggest slice. Is it what you expected? If flights and lodging dominate, that is normal: fixed costs usually do. If food is the largest slice on a trip you thought was cheap, that is the interesting finding.
3. Find anything uncategorised or marked "Other" and reassign it using the rules above. Entries saved without a category are grouped as "Uncategorized" in the trip summary the app builds (server/routes/trips.ts), so they are easy to spot.
4. Compare the on-the-ground total with the fixed total. The daily figure that excludes flights and accommodation is the one that predicts your next trip to a similar place. The article on how to stop guessing what trips actually cost shows how to read both numbers.
5. Write down one sentence about what surprised you. That sentence is worth more than any chart.

This takes five minutes only if the entries were sorted consistently as you went. If you did it at the end of a three-week trip from memory, it will take an hour and be less accurate, which is the real argument for deciding the rules in advance.

Writing your rules down

The most useful thing you can do after reading this is to open a note and write your answers to seven questions: where do airport transfers go, where do resort fees go, where do tips go, how do you log shared bills, where does your phone plan go, what happens to booking fees, and which heading wins when two fit. Seven lines. Keep it on your phone.

Then use it on your next trip. You will find that most of the effort of keeping a record was never the typing. It was the repeated small decisions, and a written rule removes them.

If you travel by road across borders, the same discipline applies to fuel, tolls, parking and vignettes, and the guide to logging a road trip that crosses several countries shows how to keep those together as the currency changes.

Where to go from here

You do not need a perfect category scheme. You need a scheme that you apply the same way every time, with the awkward cases settled in advance and the leftover heading kept small. Start with your next trip, write the seven rules in a note, and sort as you spend. When the trip ends, spend five minutes with the breakdown and see which slice surprises you.

If you want somewhere to keep the result, start your record at MapMyWorld. The category chart is there from the first expense you log.