Used EV Purchase Decision Calculator

Work out whether buying a used EV makes financial sense for you in the UK.

Your Details

Your Current Car

Monthly miles Current car MPG Fuel price (£/litre) Yearly insurance (£) Yearly servicing (£) Road tax (£/year)

Standard 2026/27 rate is £200. Pre-2017 cars may differ.

Original list price exceeded £40,000 — luxury supplement applies (+£440/yr) Current car value today (£)

EV Purchase

Used EV asking price (£) I have a car to part exchange EV efficiency (miles per kWh)

Home Charger

Charger

Electricity Tariff

Day rate (£/kWh) Night rate (£/kWh) Charging done off-peak: 70%

EV Running Costs

Yearly insurance (£)

EVs can cost slightly more to insure due to higher repair costs

Yearly servicing (£) Road tax (£/year)

Standard 2026/27 rate is £200 for EVs registered after April 2017.

Original list price exceeded £50,000 — luxury supplement applies (+£440/yr)

Depreciation

Years you plan to own the EV EV depreciation rate (%/year)

Used EVs typically depreciate 12–20%/yr depending on age & model

Current car depreciation rate (%/year)

Petrol cars typically depreciate 8–12%/yr

Your Results

Monthly Running Costs

Petrol fuel

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EV charging

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Petrol insurance

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EV insurance

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Petrol road tax

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EV road tax

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Petrol servicing

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EV servicing

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Monthly saving switching to EV

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Purchase & Upfront

Net EV cost after part exchange

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Home charger cost

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Total upfront outlay

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Depreciation Over Ownership Period

EV value lost

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Petrol value lost

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Depreciation difference

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Summary

Break-even time (running costs only)

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Overall verdict over ownership period

Hit Calculate to see results

How this works

This calculator compares fuel, charging, insurance, road tax, servicing, charger setup and depreciation to give a full picture of whether switching to a used EV makes financial sense. Road tax uses 2026/27 UK VED rates: £200/year standard for both EV and petrol, with a £440/year luxury supplement for cars whose original list price exceeded £50,000 (EV) or £40,000 (petrol), applied for up to 5 years from second year of registration. The overall verdict accounts for upfront costs, monthly savings and depreciation difference over your chosen ownership period. Figures are estimates only.

About

The EV Calculator is a free UK-focused tool designed to help you decide whether switching to a used electric vehicle makes financial sense for your situation. Simply enter your current driving costs and compare them against the estimated running costs of an EV — including charging, insurance, road tax, servicing and setup. No sign-up, no data collected, just a straightforward calculation.