What My Car Really Costs Forget the payment with fuel, insurance and servicing, what's it a month?

Fuel and insurance leave your bank account, so you know about them. The value the car quietly loses is normally the biggest cost of owning it and nothing ever tells you. This puts that line first, then checks your total against what AAA, the IRS and HMRC actually publish.

WHAT YOU GET

- Every cost including depreciation, split into a chart and a table

- Compared against AAA's 77.18¢ a mile and the IRS's 76¢ — or HMRC's 55p in the UK

- Three published depreciation figures that disagree by more than twenty points

- What one specific trip costs in fuel, and what it costs once everything is counted

- Dollars and gallons, or pounds and litres, with the right gallon for each

HOW IT WORKS

1. Put in the car and the miles — And what it's worth now, or take one of the three guesses.

2. Fill in what you actually pay out — Fuel, insurance, tax, servicing, finance.

3. Read the per-mile number — Then compare it with what the official sources publish.

One file. Double-click it and it opens in the browser you already have — Chrome, Edge, Safari or Firefox. Nothing to install, no account, no subscription.

Nothing you type ever leaves your computer. There is no server involved, which is why it still works with the wi-fi switched off.

30-day refund, no questions asked.