MilesheetPlanning a road trip so the money does not sour it
Agree the rules before you leave, not at a service station at eleven at night.
Shared driving falls out over money more often than over routes, and almost always for the same reason: nobody agreed what the deal was while everyone was still enthusiastic.
Settle three things before you set off
Who is paying for what. Fuel only, or fuel plus tolls, parking and the ferry? Say it out loud. "We'll sort it out" is how you end up with one person quietly £80 down.
Whether the driver pays a share. Both answers are reasonable. Everyone including the driver splitting equally is fair because everyone is going. Passengers covering the fuel is fair because the driver is providing the car, the wear and the concentration. Pick one.
What happens if plans change. Somebody drops out the night before, somebody gets a train home. Decide whether the split is by head or by seat booked.
Work out the real number, not a round one
The honest figure is fuel used, not the amount that went into the tank at the last fill.
litres = miles ÷ (mpg ÷ 4.546), then multiply by price per litre.
400 miles in a car doing a real 44 mpg is about 41 litres. At 145p, roughly £60. Four people sharing equally is £15 each; three passengers covering it is £20 each.
Use your car's real economy, not the brochure. The gap is usually 10–20% and it comes out of the driver's pocket.
The full cost of a weekend away
Four people, 300-mile round trip, 44 mpg, 145p a litre:
| Item | Cost | Notes |
|---|---|---|
| Fuel | £45.00 | Using real economy, not the brochure |
| Tolls / crossings | £0–£15 | Route dependent |
| Clean air / congestion charges | £0–£27.50 | If the route goes through a charging city |
| Parking, 2 nights | £0–£40 | Often the largest single item |
| Typical total | £45–£127 |
Split four ways that is £11 to £32 each — a threefold range depending on things nobody thinks to mention when the trip is being planned.
Add the things people forget
- Tolls and crossings
- Parking at the destination, which on a festival or airport run can rival the fuel
- Congestion or clean air charges through cities
- The return leg, which somehow always gets left out of the estimate
Send a number, not a vibe
The thing that makes this awkward is ambiguity, not cost. A message saying "about twenty quid?" invites negotiation. A figure with the distance and the fuel price behind it ends the conversation.
Milesheet records the drive, costs it from your own measured economy, splits it between however many were in the car — with or without the driver taking a share — and shares the journey as a PDF with the route and the numbers on it. Nobody else needs the app to read it.
And if any of it was work
Keep the legs separate. A trip that is three days of holiday and one client meeting is not one journey, and the claimable part is only the part that was business. Recording each leg as it happens means you are classifying rather than reconstructing.