Fuel Duty Calculator

How much of what you spend on fuel goes to the Treasury? Enter your annual miles and your car’s real MPG to see the duty and VAT you pay in a year at today’s real UK average price, and what the 2027 rises would add. For how duty works, see fuel duty explained.

UK average: the forecourts that reported in the last 7 days.

Fuel

UK average: 175.0p/litre, as of 7 Oct 2026, 11:07

Miles you drive a yearYour last two MOT certificates show the mileage a year apart — the difference is your annual miles.Your car's real-world MPGWhat your car actually gets, not the brochure figure. Not sure? Use the real-world MPG calculator.

Enter your annual miles and your car’s real-world MPG above.

At today’s UK national average and today’s duty rate. Prices move; duty only changes when the government changes it.

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Rates: Amended Fuel Duty rates 2026 to 2027 (HM Revenue & Customs), published 2026-05-22 (GOV.UK); VAT at 20% (GOV.UK). The 2027 figures are the legislated default and will be confirmed or changed at the 28 October 2026 Budget.