Find the true monthly cost of your work car.

Company car, salary sacrifice or cash allowance. CarCosted works out the tax, NI, BIK, running costs and business-mile reimbursement so you can compare the real monthly cost.

UK 2026/27Scotland + rest of UKEV · PHEV · Petrol / hybrid152 popular variantsFree · no sign-up

About you

Income Tax region

Annual gross/taxable employment income before the car

£ / yr

Use income before the car salary sacrifice. Include expected taxable bonus where appropriate. £65,000, 65000 and 65k all work.

Your work car

How is the car provided?Choose salary sacrifice when your employer reduces your gross salary in return for the car.

Quick fill a popular company car

Make

Model

Variant

152 popular UK company-car variants. P11D and 2026/27 BIK snapshot last checked 8 August 2026. Always verify the exact derivative, factory options and P11D on your employer quote. Manual entry remains available.

Vehicle type

P11D / list price

Required private-use payment

£ / mo

Other fixed car cost

£ / mo

Anything you pay separately from payroll each month that does not qualify as a private-use BIK deduction. Use a net/after-tax cost here.

Electric car details

Efficiency

mi/kWh

Home electricity

p/kWh

How much of your charging is public?

Used to split your electric driving between home and public charging.

Public charging price

p/kWh

Driving

Total miles per month

Business miles per month

Business-mile reimbursement

What does your employer reimburse?

p/mile

Enter the rate your employer actually pays. CarCosted compares it with the HMRC advisory benchmark for the car.

Do you charge differently when travelling for work?No — use the same public charging share entered above.

Employer can substantiate a higher actual fuel/electricity cost?Only tick this if the employer can evidence why its rate is above HMRC's benchmark.

Compare with cash allowance BETA

Compare this car with taking the cash instead?Cash allowance is taxable earnings. CarCosted deducts the extra Income Tax and employee NI before using the allowance in the comparison. Add the costs of the car you would fund yourself so it is genuinely like-for-like.

Estimate only, not tax advice. Rates last checked 8 August 2026. Full-year car availability, standard employee NI Category A and even monthly pay for NI estimates are assumed.

CarCosted · built by Gus · Free calculator · Cash comparison beta · No account required · Calculator inputs are not deliberately saved.