Classification

What Counts as Business Mileage?

Eight real-world situations UK drivers ask about, with plain answers on whether HMRC lets you claim. The rules are not as strict as people fear, but a few specific traps catch most drivers out.

The 60-second answer

A trip counts as business mileage if its main purpose is work and you are not travelling to your permanent workplace. Sites, clients, suppliers, and temporary locations all qualify. A daily commute to the same office does not.

The awkward case is home-to-first-job. If you work from home most days, the trip to an occasional client counts. If your real base is a fixed office you attend most days, it does not. Everything else below is a variation on that rule.

Edge Cases

Eight situations, eight answers

Driving from home to your first job of the day

Depends

This is the most asked question and the most nuanced answer. HMRC's rule turns on whether home is your “permanent workplace”. If you work from home most days and occasionally drive to a client, customer, or site, the trip from home to that site is business mileage. If your home is where you sleep and your real base of work is a fixed office or depot you attend regularly, the trip is ordinary commuting and does not count. Sole traders and mobile workers (plumbers, sparkies, gig drivers, mobile hairdressers) usually fall into the first camp. Employees commuting to the same office five days a week fall into the second. If the answer is unclear, a short conversation with an accountant is worth more than guessing.

Trips between two job sites in one day

Counts

Unambiguously business mileage. The drive from site A to site B is for work, regardless of where you started the day. This is true whether you are a trades contractor, a district nurse, a sales rep, or a gig driver moving between zones.

Driving to a training course

Depends

Business mileage if the training is work-related and required or expected by your employer or your trade. Think required CPD hours, a health-and-safety update your employer books, or a certification your self-employment depends on. Not business mileage if the training is for a new career, a hobby, or a general-interest qualification. The test is whether the training supports the work you already do.

Driving to a networking event or business breakfast

Depends

Technically yes if the event is genuinely for business - you are there to win work, meet suppliers, or represent your company. In practice, HMRC is sceptical of trips that look like socialising with a business hat on. If you are self-employed and regularly attend industry meetups, keep a note of who you spoke to or what came out of it. That turns it from looking like a lunch into a defensible business trip.

Picking up materials from a supplier

Counts

Business mileage, straightforward. Whether you are picking up parts from a wholesaler, timber from a builders merchant, or stock from a warehouse, the trip is for work and qualifies for the 45p/25p rate.

Driving to a client lunch

Depends

Business mileage if the purpose of the trip is a genuine business meeting, even if food is involved. Not business mileage if the meeting is an excuse to socialise with someone who happens to be a client. Keep notes of what was discussed - that is often the only difference between a legitimate claim and one HMRC disallows.

Driving for a registered charity

Counts

Volunteer drivers for a registered UK charity can claim the HMRC approved rate (45p/25p) against the mileage the charity reimburses them, as long as the charity is genuinely repaying mileage rather than paying for services. If the charity pays less than 45p, you can claim the shortfall as Mileage Allowance Relief. If they pay you more, the excess is taxable. Personal volunteering for a group that is not a registered charity does not qualify.

School run, then on to a job site

Does not count

The school run is personal. Tacking a work trip onto the end does not convert the school run into business mileage. What does count is the leg from the school (or wherever you dropped the kids off) to the actual job site. So if you drop the kids at 8:30am and then drive 12 miles to a client, only the 12 miles from the school to the client is business. The miles from home to the school are personal, always.

The Rule Behind Most of These

What is a “permanent workplace”?

HMRC's entire framework for commuting vs business travel hinges on this phrase. A permanent workplace is somewhere you attend regularly, for a substantial period of your work. The travel between home and a permanent workplace is ordinary commuting - never claimable.

A temporary workplace is somewhere you attend to perform a task of limited duration, or for a temporary purpose. Trips to a temporary workplace are business mileage. HMRC generally considers 24 months the threshold: if you know from the start that you will be travelling to the same location for more than two years, it is no longer temporary.

For mobile workers (gig drivers, trades contractors, mobile hairdressers, district nurses, field engineers), home is usually the base and every work destination is temporary. For office-based employees, the office is the permanent workplace and only occasional travel to clients or other sites counts. The grey area is hybrid workers who split time between home and an office - the HMRC guidance is that whichever location you attend more is the permanent one. If unsure, ask an accountant. A £50 conversation can save you hundreds in incorrectly claimed or missed mileage.

If in doubt

Log the trip and classify it as business. Note down the reason - client name, job reference, platform tag. At tax time, if you are still unsure whether to claim, that is when to check with an accountant. It is far easier to remove a claim than to reconstruct a trip six months after the fact.

Keep reading

HMRC rates in detail →Full business mileage guide