RealCost Guide
Is Electric Cheaper Than Petrol UK?
Electric cars can be cheaper than petrol cars in the UK, especially if you charge at home on a good tariff and drive enough miles to benefit from the lower energy cost per mile.
But electric is not automatically cheaper for every driver. Public rapid charging, higher insurance, tyre wear, depreciation, road tax changes and buying more EV than you need can reduce or remove the saving.
Electric is cheapest when charging is cheap
The biggest EV saving usually comes from charging cheaply at home. If you rely heavily on expensive public rapid chargers, the cost advantage can shrink quickly.
The right question is not “is electric always cheaper?” It is “is electric cheaper for my mileage, charging access, insurance, depreciation and car choice?”
Compare electric vs petrol running cost
Use the Electric vs Petrol Running Cost Calculator to compare your own annual mileage, petrol price, MPG, electricity price and EV efficiency.
This calculator compares running energy costs. For full ownership cost, also check insurance, depreciation, road tax, tyres, finance and maintenance.
Quick answer: electric is usually cheaper than petrol when you can charge at home, drive regular mileage and choose an EV with sensible insurance, depreciation and tyre costs. Petrol can still be cheaper or simpler for low-mileage drivers, drivers without home charging, or buyers choosing expensive EVs with high fixed costs.
What decides whether electric is cheaper?
The answer depends on more than petrol versus electricity price.
Cheap home electricity can make EV running cost per mile much lower.
Public rapid charging can be much more expensive than home charging.
Higher mileage gives more opportunity for fuel savings to add up.
A very efficient petrol car is harder for an EV to beat by a large margin.
Miles per kWh matters. Bigger, heavier EVs usually use more electricity.
Energy savings can be wiped out if the EV costs much more to insure or loses value heavily.
Home charging vs public charging
Charging location is often the difference between a clear EV saving and a weak one.
Home charging
Usually the strongest EV case, especially with regular mileage and a sensible electricity tariff.
Public rapid charging
Can reduce the saving because the price per kWh is often much higher than home charging.
Simple electric vs petrol examples
These examples show why the same answer does not apply to everyone.
Low-mileage driver
If you drive very few miles, the fuel saving may be too small to outweigh higher purchase cost, insurance or depreciation.
Regular commuter
An EV can work well if you can charge at home and your commute gives enough mileage for the savings to matter.
High-mileage driver
Electric can be strong, but only if charging access is reliable and the car does not bring high insurance, tyre or depreciation costs.
When electric is usually cheaper
These are the situations where EVs tend to make the strongest financial case.
When petrol may still be cheaper or simpler
Petrol still has a place for some drivers.
Costs beyond fuel and charging
The cheapest energy cost does not always mean the cheapest car.
EV insurance can vary widely, so check real quotes before buying.
A cheaper running cost can be outweighed by heavy value loss.
Heavy EVs can need careful tyre budgeting, especially with large wheels.
EV servicing can be simpler, but diagnostics and specialist repairs still matter.
EVs now need VED budgeting, so do not compare using old £0 tax assumptions.
If you need a charger installed, include that in the ownership decision.
Used EV battery and range risk
A used EV can be a bargain, but do not ignore battery and range suitability.
Real-world range
Check whether the car’s real range suits your normal journeys, not just the official figure.
Battery condition
Battery health, warranty and charging history can affect whether a used EV is a smart buy.
Do not overbuy range
A bigger battery can cost more to buy, insure and replace tyres on. Buy the range you need, not the largest possible battery.
How this page is different from related EV pages
Use the right page depending on the decision you need to make.
Answers when electric is cheaper than petrol and when it is not.
Main tool for comparing electricity cost, petrol cost, MPG and EV efficiency.
Broader EV ownership-cost guide including insurance, tyres, servicing and depreciation.
Useful electric vs petrol calculators and guides
Use these next to check whether electric really works out cheaper for you.
Compare costs →
Check charging →
Read guide →
Check per mile →
Compare options →
Check full cost →
Check insurance →
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