Mileage split calculator
Say how far the car went and how many people were in it. The drive is costed at the official reimbursement rate for the country you pick, and underneath is what each passenger owes whoever drove.
A fair rate for each kilometre is never the petrol on its own. It is standing in for the tyres, the service that comes round sooner, and the value the car sheds while you are enjoying it — which is why an official figure sits well above what the pump alone would suggest. Type over it if you know the car better than the state does, or build your own from what it drinks. Let Split by Peanut do the asking afterwards, so the driver never has to raise it in the group chat.
Sets the rate below. Every rate here was read off that government’s own page in July 2026, linked under the picker.
0.55 GBP a mile, from 6 April 2026. It is the approved rate for the first 10,000 miles of a tax year and 0.25 after that, and one drive does not reach the line.
Who owes the driver what
- Passenger 11 of 3 shares
- £55.00
- Passenger 21 of 3 shares
- £55.00
- Passenger 31 of 3 shares
- £55.00
- Distance300 mi
- Rate for each mile0.55
- What the drive cost£165.00
The cost of a drive rarely divides evenly, so whatever is left at the end goes to the largest fractions first, one unit each. The column adds up to what the drive cost exactly.
What the rate leaves for the receipts
It prices distance and nothing else. Tolls, ferries, parking and the coffee at the services sit outside it, and they have receipts of their own. Those belong in the room with the rest of the trip.
It does not pay anybody for driving, either. Four hours at the wheel is a real thing to have done and no per-kilometre figure prices it. Groups tend to settle that with the front seat and the choice of music, and the ones that try to settle it with money rarely enjoy the conversation.
When the fuel receipt is the better tool
One tank, one receipt, one drive: divide what the pump charged and stop there. A rate for each kilometre earns its keep on a car somebody owns, where the cost is spread across years of servicing nobody kept the paperwork for. On a hire car the invoice plus the fuel is the truer number, and it is already written down.
Good to know
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158 currencies, converted at the day’s rate.
A room holds up to twenty people.
Split records a payment rather than making one. It does not check with a bank and cannot.
The fuel was not the only thing somebody paid for
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Start a splitQuestions
- Why split petrol at a government mileage rate?
- Because it is the one number in the car that nobody in the car chose. Each of these is a government’s working estimate of what a distance in a private car costs whoever owns it, and it is published, dated and open to be read. Splitting the pump receipt alone quietly undercharges the owner, and doing the depreciation sums yourself over a weekend away is how a lift turns into a grievance.
- What if the car is hired rather than somebody’s own?
- Then the rate has nothing to add. A hire company has already priced the wear into the day rate, so the honest number is the hire invoice plus whatever went into the tank, and both of those are receipts you can put in a room as ordinary expenses. Rates for each kilometre exist for the car that has no invoice, because it belongs to one of you.
- What should a per-kilometre rate include besides petrol?
- Everything the distance uses up rather than everything the day costs. Fuel is the part with a receipt, and it is the smaller part: tyres wear, the service interval arrives sooner, and a car with more miles on it is worth less than the same car without them. That is why the builder here shows the fuel on its own line and then asks what goes on top. A rate left at the fuel floor charges the driver for the petrol and hands them the rest.
- Should the driver pay a share of the mileage too?
- Both arrangements are ordinary, and the toggle does whichever you tell it. Left as it is, the passengers cover the drive between them, which is the usual reading of a lift: one person supplies the car, the others supply the money. Turned on, the driver takes an equal share alongside everyone else, which reads fairer when the car is doing a job for the whole group rather than a favour for the passengers.