Electric vs Petrol: What will it really cost you?

Adjust the sliders to match your driving. See the true monthly and annual cost difference.

Your driving profile

How do you mostly drive?

Commuter

Family driver

High mileage

Weekend use

Custom

Annual mileage10,000 mi

Your income tax band

Electric car assumptions

EV monthly lease (gross, via salary sacrifice)£445

Home electricity rate7 p/kWh

EV efficiency3.8 mi/kWh

EV Benefit-in-Kind (BiK) monthly£45

Petrol car assumptions

Petrol monthly lease (personal, post-tax)£380

Petrol price145 p/litre

Petrol efficiency42 mpg

Servicing & maintenance (monthly)£17

Road tax (VED) – annual£195

Electric (salary sacrifice)

£0/mo

Petrol (personal lease)

£0/mo

You save with electric

£0 / month

Per year

£0

EV monthly£0

Petrol monthly£0

Monthly breakdown

CostElectricPetrol

Net lease cost£0£0

Fuel / charging£0£0

Servicing & maintenanceIncluded£0

Road tax (VED)Included£0

BiK tax£0—

The EV net cost reflects salary sacrifice: lease is deducted pre-tax, so you save Income Tax & NI at your marginal rate. BiK is added back as a small taxable benefit.

Illustrative only. Actual figures depend on vehicle choice, employer scheme, HMRC rates and usage. Figures assume UK tax year 2025/26, Employee NI at 8% (20% band) / 2% (40/45% bands), and UK gallon of 4.546 L for mpg conversions. Not financial advice.