Pricing and business
Business mileage at HMRC simplified rates
- where
- business miles for the job
- one-way distance to the job (miles)
- number of visits
- miles at the higher rate
- higher-rate mileage band (miles)
- business miles already claimed this tax year
- miles at the lower rate
- rate for the first band (p/mile)
- rate after the band (p/mile)
Explain this equation
Works out the business mileage for a job and what it is worth at HMRC's simplified mileage rates. Use it to cost travel into a price or to keep your mileage records straight.
Each visit is a round trip, so miles are twice the one-way distance times the visits. HMRC pays a higher rate up to a yearly threshold, then a lower rate. M_1 is the part of this job's mileage that still falls under the threshold, given what you have already claimed this year (never less than zero). Anything over goes into M_2. The rates are in pence, so dividing by 100 gives pounds.
It is a two-band tariff: the min and max pick out how much of the job sits in each band.
Sense check: 15 miles each way, 4 visits, is 120 miles; well under the threshold that is 120 times the higher rate.
Watch out: check the current HMRC rates and band each tax year. If you use simplified mileage you cannot also claim the actual running costs of that vehicle.
Works out the round-trip business mileage for a job and its value at HMRC’s simplified mileage rates, splitting miles either side of the 10,000-mile band.
Enter your values to see the result.
Good to know
From 6 April 2026 the HMRC rates for cars and vans are 55p a mile for the first 10,000 business miles in the tax year and 25p after that. Sole traders using simplified expenses can claim these instead of actual vehicle costs, but once chosen for a vehicle you must keep using them for that vehicle. Keep a mileage log, and recover the cost in your price.
Common mistake
Claiming both the mileage rate and fuel, insurance or servicing for the same vehicle. The flat rate already covers running costs.
Limits
Cars and goods vehicles only; motorcycle and bicycle rates differ. Commuting to a permanent workplace is not business mileage. Check GOV.UK each tax year.
Sources
Results are calculations from the published methods and figures shown, and depend on the data you enter. Follow the roof covering manufacturer’s fixing specification, BS 5534, BS 8000-6, BS 6229, the Lead Sheet Training Academy guidance and Building Regulations. Wind uplift and structural design need a competent designer.