Mileage allowance calculator for the self-employed

Enter your business miles to see what you can claim with HMRC's flat rate: 55p a mile for the first 10,000 miles in a van or car from April 2026, then 25p.

The calculator loads here when JavaScript is on. The worked example below shows how to do the sum by hand.

The flat rates

As a sole trader, you can claim your van or car costs as a flat rate for each business mile, instead of adding up fuel, insurance, repairs, servicing and the rest. This is HMRC's simplified expenses for vehicles.

Flat rates per business mile, from GOV.UK
Vehicle2026 to 2027Before 6 April 2026
Cars and vans, first 10,000 miles55p45p
Cars and vans, after 10,000 miles25p25p
Motorcycles24p24p

The first-10,000-miles rate went up from 45p to 55p on 6 April 2026, so check any older calculator or spreadsheet you use.

A made-up example

A roofer drives 12,000 business miles in their van in the 2026 to 2027 tax year.

  • 10,000 miles × 55p = £5,500
  • 2,000 miles × 25p = £500
  • They can claim £6,000 as an expense. With profit in the basic-rate band, that's about £1,560 less Income Tax and Class 4 National Insurance.

The rules to know

  • Who can use it: sole traders, and partnerships with no company as a partner. Limited companies can't.
  • Not if you've claimed the van already: you can't use the flat rate for a vehicle you've claimed capital allowances on, or put through as an expense when working out your profits.
  • Once you start, you stay: after you use the flat rate for a vehicle, you must keep using it for as long as you use that vehicle for the business. You don't have to use it for all your vehicles.
  • Parking and other travel go on top: you can still claim parking and things like train fares.
  • Keep a record of your business miles: the date, where from and to, and the miles. A note on each job of the trip there does it.

A van that does a lot of miles and cost a lot to buy may be worth more claimed at actual cost. GOV.UK's simplified expenses checker compares the two. Source: GOV.UK, simplified expenses for vehicles.

Fewer wasted miles

In Knockround, the day's jobs and regular customers are listed in order on your phone, and each job keeps the customer's address, so you can see where you went and when. Every invoice has a Pay button for Apple Pay, Google Pay or card, so there's no trip back to collect.

Try it on the round demo, with made-up customers. It's free for 7 days with no card needed, then £19.99 a month.

Written by the Knockround team. Rates checked on GOV.UK on 29 October 2026. This is a guide, not tax advice: an accountant can tell you what applies to you.

Try it on tomorrow's work

Sign up in a minute with Google or your email. 7 days free with no card needed, then £19.99 a month or £199 a year. We'll help you move your customers across.