Calculate the total annual cost of running a car including fuel, insurance, tax and servicing.
Enter annual mileage
Type your typical yearly mileage. UK average is 7,400. Mileage drives fuel cost (linearly) and depreciation (roughly — higher mileage cars depreciate faster).
Add fuel economy and price
Enter real-world MPG and current pump price. Or for EVs, enter miles/kWh and your blended electricity rate. Fuel is typically 30-40% of total running cost.
Enter insurance and VED
Add your annual fully comp insurance premium and road tax band. Insurance is the single largest cost for many under-30s and most central-London drivers.
Add servicing and tyres budget
Use £200-£400/year for mainstream brands or £350-£700 for premium. Add tyre replacement budget (£150-£250/year average) and MOT £54.85.
Read annual and monthly cost
See total running cost per year and per month. Compare against the same car under different mileage or against an alternative car using the Electric Car Savings Calculator.
London's ULEZ costs £12.50/day; Birmingham, Bristol, Sheffield and other UK Clean Air Zones charge £8-£10/day for non-compliant vehicles. Here's exactly which cars are exempt
What happens after you submit your Self Assessment return — refunds, balancing payments, amendments, HMRC enquiries, the SA302 for mortgages, and the 5-year record-keeping rule
Making Tax Digital for Income Tax (MTD ITSA) starts April 2026 for £50k+ self-employed and landlords. Here's what it means, when it applies to you, the software requirements and how it changes Self Assessment forever.
Disclaimer: All results are estimates for guidance only and do not constitute financial, tax or legal advice. Always consult a qualified professional.