Keep it, or switch? See the real cost.
A few plain questions — no car knowledge needed.
Everything below is driven by the numbers you set above. Change anything and it updates. Nothing you type leaves your browser — the Share button just packs your inputs into the link.
| Option | Power | Running p/mile | All-in p/mile | Fuel/elec /yr | Depreciation /yr | Fixed /yr | Total over horizon |
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Mostly it's already baked into the car's current value — an older car is simply worth less, so there's less left to depreciate. What age adds on top is rising repair risk and limited remaining life: a 15-year-old car may not survive a 7-year comparison at all. Those aren't captured automatically, so set a realistic Repairs £/yr (and shorten the horizon if the car likely won't last it). The Age field flags this for you.
Charge largely from home solar and the marginal cost of those miles is close to zero — an EV's running cost can fall to 2–3p/mile against 14–20p/mile for petrol or diesel. Set your realistic home / public / solar split per car to see it.
Tools that do similar comparisons (and where the default figures come from):
Default rates are illustrative UK 2026 values (petrol ≈ £1.40/L, home electricity ≈ 27p/kWh, rapid public ≈ 79p/kWh). Always replace them with your own quotes.
Guidance only, not financial advice. Real costs depend on your tariff, driving and the specific cars. This tool stores no personal data and has no backend.