Mileage, treats, insurance — tracked in one app
Drive to clients. Buy treats and waste bags. Pay insurance. Take a training course. All in one place.
Mileage and small purchases — easy to forget at tax time
A typical dog walker drives between 5–10 client homes a day, picks up treats and waste bags from the supermarket, pays for canine first-aid courses, insurance and a DBS check. Mileage alone is often the single biggest deduction — and the easiest to lose.
What PocketReceipt tracks for dog walkers
Client mileage
GPS or manual trip log to every client. HMRC 55p/25p auto-calculated. Multi-stop walks handled.
Treats & waste bags
Treats, poo bags, leads, harnesses, towels. Quick-snap consumables receipts.
Insurance & DBS
Pet business insurance, public liability, DBS renewal. Tagged once, scheduled annually.
Training courses
Canine first-aid, behaviour qualifications, dog-handling courses. Fully allowable CPD.
Vehicle expenses
Choose simplified mileage or actual van costs. PocketReceipt's calculator picks the cheapest for your tax.
Phone & subscriptions
Business-use share of phone bill. Booking apps, accounting subs. Categorised automatically.
A typical dog walker's day, tracked
- 8:00am — start trip, drive between 6 client homes, mileage auto-logged
- 11:00am — pick up treats and poo bags from the supermarket, scan receipt
- 1:00pm — pay for a canine first-aid CPD course, receipt forwarded
- 3:00pm — second walk loop, mileage continues
- 5:00pm — public liability monthly premium auto-tagged
- Friday — export weekly summary to your accountant
Allowable expenses for self-employed dog walkers
HMRC lets you deduct any cost that is wholly and exclusively for your dog-walking business. The table below maps a typical sole-trader dog walker's spend — group walks, one-to-one walks, pet sitting, drop-in visits — to the boxes on SA103F. Mileage between client homes is usually the biggest single line.
| Expense | Claim? | SA103F box | Notes |
|---|---|---|---|
| Mileage between client homes — simplified rate | Yes | Box 20 — Car, van and travel expenses | 55p first 10,000 business miles, 25p after. Cannot be combined with actual costs or capital allowances on the same vehicle. |
| Vehicle running costs — fuel, MOT, servicing, repairs, VED (actual method) | Yes | Box 20 | Only if you are not using simplified mileage on the same vehicle. Apportion any private use. |
| Dog-transport kit — crates, dog guard, boot liner, harness anchors | Yes | Box 49 — Annual Investment Allowance / cash basis expense | Capital purchase. Under cash basis include with other expenses; under traditional accounting claim AIA. |
| Vehicle valeting — dog hair, mud, smells | Yes | Box 20 | Frequent valets are a real cost for dog-transport vehicles. Allowable as a business-vehicle running cost. |
| Leads, slip leads, harnesses, dog whistles, treat pouches, water bottles | Yes | Box 22 — Repairs and maintenance of property and equipment | Replacement kit that wears out regularly. |
| Treats, training rewards (bought wholesale) | Yes | Box 17 — Cost of goods bought for resale or goods used | Used on the job. |
| Poop bags, sanitiser, wipes, towels | Yes | Box 17 | Consumables used on every walk. |
| Wet-weather kit for dogs — coats, drying coats, blow dryers | Yes | Box 17 / Box 22 | Used by the dogs in your care. |
| Public liability + care, custody & control insurance (Cliverton, PetPlan Sanctuary) | Yes | Box 21 — Rent, rates, power and insurance costs | Pet-business-specific cover is essential — standard household or pet insurance does not cover dog walking professionally. |
| DBS Update Service annual subscription | Yes | Box 30 — Other business expenses | Clients trust you with house keys — many ask to see a current DBS. |
| Trade body subscription — PDWA / NarpsUK / PIF | Yes | Box 30 | Listed by HMRC as an example of allowable trade subscriptions. |
| Canine first aid, dog behaviour or low-stress handling CPD | Yes | Box 30 | Refresher training in your existing trade is allowable. |
| DEFRA Animal Activities Licence (if you also offer home boarding or day care) | Yes | Box 30 | Local authority licence required if you board dogs overnight. Annual fee allowable in full. |
| Mobile phone bill — business proportion | Partly | Box 23 — Phone, fax, stationery and other office costs | Estimate honestly — 50–80% is typical for a dog walker running bookings through the phone. |
| Booking software (Time To Pet, Pet Sitter Plus, ScoutAbout) | Yes | Box 23 | Monthly subscriptions allowable in full. |
| Stationery — contracts, vaccination record copies, business cards, leaflets | Yes | Box 23 | Day-to-day office consumables. |
| Advertising — local Facebook, Tailster, Borrow My Doggy, Yappily, leaflets, branded website | Yes | Box 24 — Advertising and business entertainment costs | Client entertainment is not allowable. |
| Card terminal fees (SumUp, Zettle, Square) | Yes | Box 26 — Bank, credit card and other financial charges | Easy to miss — fees are netted off before money reaches your bank. |
| Accountant or bookkeeper fee | Yes | Box 28 — Accountancy, legal and other professional fees | Including the cost of preparing your Self Assessment. |
| Working from home flat rate (admin, scheduling, ordering supplies) | Yes | Box 21 | £10 / £18 / £26 a month for 25–50 / 51–100 / 101+ hours business use. |
| Plain trousers, T-shirts, ordinary trainers — even when covered in mud | No | — | HMRC: "you cannot claim for everyday clothing (even if you wear it for work)." Branded fleeces with your business logo are different. |
| Your own dog's food, vet bills, grooming, training | No | — | Personal pet, never allowable — even if your own dog joins client walks. |
| Lunch and food on the working day | No | — | Subsistence is only allowable on overnight trips away from your normal area. |
| Speeding fines, parking penalties | No | — | Fines are never allowable. |
Box numbers from HMRC SA103F Notes 2026. SA103S (turnover under £90,000) maps to the same expense categories on boxes 11–19, with Box 23 for AIA.
Becky, a Sheffield dog walker earning £24,000
The setup
Becky is 30, lives in Sheffield and runs her dog-walking round as a sole trader. About 18 regular weekly clients, plus drop-in pet sitting and a couple of board-and-day-care dogs on rotation under her DEFRA Animal Activities Licence. Annual income for 2025–26 is £24,000. She drives a 6-year-old Citroën Berlingo with a crate fit-out, 8,000 business miles a year on simplified mileage. No CIS, no VAT registration.
What she claims at year end
Tracked through PocketReceipt across the year:
The maths
Gross turnover £24,000 minus £6,904 of expenses leaves a taxable profit of £17,096. After the £12,570 personal allowance, £4,526 falls in the basic-rate band. Income Tax at 20% is £905. Class 4 NICs at 6% on profits between £12,570 and £50,270 add £272. Total tax due: £1,177.
What it would have cost without the records
If Becky had only claimed the obvious — mileage, insurance and her accountant fee, around £4,200 — her taxable profit would be £19,800. Income Tax would be £1,446 and Class 4 NICs £434, total £1,880. The records save her £703 a year — most of the gap is treats, consumables, vehicle valeting, software, CPD and the working-from-home flat rate.
MTD ITSA — coming for dog walkers from April 2028
For decades sole traders filed a tax return once a year on 31 January. From April 2026, anyone with combined self-employment + property income over £50,000 must file 5 times a year instead: four quarterly cumulative updates (due 7 August, 7 November, 7 February and 7 May) plus a Final Declaration on 31 January.
The threshold drops to £30,000 from 6 April 2027 and to £20,000 from 6 April 2028 — which catches Becky in our example, and most full-time dog walkers. HMRC tests qualifying income against your previous tax year's Self Assessment, so the year that gets you into scope is the one before your start date. Once you're in, you can only opt out again after 3 consecutive tax years below the threshold.
Common tax mistakes UK dog walkers make
- Driving on private-only car insurance while transporting dogsThis is a legal and tax point. Standard private car insurance generally excludes commercial use. Many insurers will offer a "pet transport" or "business use class 1" extension; without it, an accident on the way to a walk can void cover. Premiums for the proper class are allowable in Box 20 or Box 21.
- Mixing simplified mileage and actual van costs on the same vehiclePick one method per vehicle and stick with it for that vehicle's life with the business. Claiming 55p/25p AND fuel receipts is double-counting and HMRC will reverse it.
- Skipping vehicle valetingDog-transport vehicles need frequent valeting — hair, mud, smells. Every receipt is allowable in Box 20. Easy to forget because you often pay in cash at the local hand-wash.
- Claiming your own dog's costsYour personal pet's food, vet bills, grooming and training are never allowable — even if you walk your own dog with client dogs. The "wholly and exclusively" test fails.
- Forgetting public liability + care, custody and control insurancePet-business-specific cover (Cliverton, PetPlan Sanctuary, Morton Michel) is essential. Standard pet insurance does not cover you when you're walking other people's dogs. Premiums are fully allowable.
- Plain clothes claimed as "work clothing"HMRC's rule is explicit: everyday clothing is never allowable, even if you only wear it for work and even if it's covered in mud. Branded fleeces or jackets with your business logo: yes. Plain leggings and trainers: no.
- Daily lunch and coffee claimed as subsistenceSubsistence is only allowable on overnight trips away from your normal working area. A meal deal between walks is not a business expense.
- Missing card-terminal feesSumUp, Zettle and Square typically deduct 1.5–1.7% before money reaches your bank. Across £8,000 of card takings that's £120–£140 a year of pure expense relief.
- Operating home boarding without a DEFRA Animal Activities LicenceIf you board dogs overnight or run home day care, you need an AAL from your local council. Operating without one is unlawful and the income from it is still taxable. The licence fee, once you have one, is fully allowable.
- Not declaring cash paymentsCash from clients still has to be reported as turnover. Dog walking is one of HMRC's compliance focus areas precisely because cash is common.
- Sleepwalking into MTD ITSAFrom 6 April 2028 dog walkers with combined self-employment + property income over £20,000 must file four quarterly cumulative updates plus a Final Declaration — 5 filings a year, not 1. Once in, the only way out is 3 consecutive tax years below the threshold.
- Missing the 5 October registration deadlineIf you went self-employed in the 2025–26 tax year you must register for Self Assessment by 5 October 2026. HMRC can charge a "failure to notify" penalty.
Year-end tax tips for dog walkers
- Renew insurance, DBS and PDWA before 5 AprilRenewing pet-business insurance, the DBS Update Service, and your PDWA / NarpsUK membership before 5 April pulls the deductions into the current tax year (under cash basis).
- Pay canine CPD before 5 AprilCanine first aid refresher, low-stress handling, behaviour CPD — pay the course fee before 5 April to bring the deduction into the current tax year.
- Buy crate fit-outs / dog-transport kit before 5 AprilA new dog guard, replacement crates, ramp or dog-secure boot system completed before 5 April pulls the deduction (or capital allowance) into the current tax year.
- Reconcile card-terminal totals against your bankPull the annual statement from SumUp / Zettle / Square. Gross takings go into turnover; processing fees go into Box 26.
- Check your Class 4 NIC band crossingFor 2025–26 Class 4 NICs are 6% on profits between £12,570 and £50,270, then 2% above. Most dog walkers sit in the 6% band.
- Plan for MTD ITSA — five filings, not oneFrom 6 April 2026 the £50,000 threshold catches very few dog walkers; from 6 April 2027 the £30,000 threshold catches busy multi-walk operators; from 6 April 2028 the £20,000 threshold catches most full-time dog walkers. Once in scope, you file four quarterly cumulative updates (7 August / 7 November / 7 February / 7 May) plus a Final Declaration on 31 January — a 1→5 jump in filing cadence.
- Watch the £90,000 VAT threshold rolling 12-month totalMost sole-trader dog walkers stay well under, but multi-walker franchises and day-care boarding can creep close. Check the rolling 12-month total each month.
FAQ for dog walkers
How do I claim mileage between client homes?
Start a trip in the app and let GPS log it, or enter manually. HMRC AMAP rates (55p/25p per mile) are auto-applied. Year-end export shows total claimable.
Are treats I buy for client dogs deductible?
Yes — treats used in the course of providing the service are an allowable business expense. Bulk-buy receipts can be tagged 'consumables'.
Can I claim my DBS check?
Yes. DBS renewals required for the business are fully allowable. Initial DBS is also allowable when starting the business.
Do I need insurance to be self-employed as a dog walker?
Yes — and you need pet-business-specific cover (Cliverton, PetPlan Sanctuary, Morton Michel) with public liability and care, custody & control. Standard pet insurance does NOT cover you when walking other people's dogs. Premiums are fully allowable in Box 21.
Do I need a DEFRA Animal Activities Licence?
Yes if you board dogs overnight or run home day care for dogs — an AAL from your local council is a legal requirement. Pure dog walking (no boarding) usually doesn't need one, but check your council's rules. The licence fee is fully allowable as a business expense in Box 30.
What does MTD ITSA mean for me as a dog walker?
Making Tax Digital for Income Tax replaces the annual Self Assessment cycle with quarterly reporting once your combined self-employment + property income crosses a threshold. That's 5 filings a year, not 1. Thresholds: £50,000 from 6 April 2026, £30,000 from 6 April 2027, £20,000 from 6 April 2028 (catches most full-time dog walkers). Quarterly cumulative updates due 7 August, 7 November, 7 February and 7 May, plus a Final Declaration on 31 January. Once in, you can only opt out again after 3 consecutive tax years below the threshold.
When is my tax due?
Self Assessment for the 2025–26 tax year is due online by 31 January 2027. If your tax bill is more than £1,000 you also pay 50% as a first payment on account that day, and another 50% on 31 July 2027. From 6 April 2028, most full-time dog walkers (over the £20,000 MTD threshold) also file four quarterly cumulative updates plus a Final Declaration each year — 5 filings a year, not 1.
Is public liability insurance fully deductible?
Yes. Public liability and specialist pet-business insurance are 100% deductible. Most walker policies are £80–£200 a year; the full amount goes in Box 21 (insurance) on SA103S.
If I also do boarding or pet sitting, is it the same tax page?
Yes. As long as you're a sole trader and it's all pet-care, treat it as one business on SA103S. Keep separate income lines internally for clarity, but HMRC just wants the combined profit.
Do I qualify for use of home if I host dogs at home for daycare?
Yes — a proportion of household running costs becomes deductible. Easiest method is HMRC's flat-rate simplified expenses based on monthly business hours (£10/£18/£26). If you make structural changes like fencing or kennels, some of that may be capital allowance instead.
HMRC and PocketReceipt references used on this page
- HMRC, Expenses if you're self-employed — overview
- HMRC, Clothing expenses
- HMRC, Simplified expenses — vehicles (55p / 25p / 24p flat rates)
- HMRC, Simplified expenses — working from home
- HMRC, Annual Investment Allowance
- HMRC, Cash basis accounting (default since April 2024)
- HMRC, Self-employed National Insurance rates
- HMRC, Self Assessment deadlines
- HMRC, Making Tax Digital for Income Tax — sole traders & landlords
- HMRC, Check if you're eligible for MTD for Income Tax
- HMRC, SA103F Notes 2026 — Self-employment (full) (PDF)
- DEFRA / GOV.UK, Animal Activity Licence (for boarders / day care)
- PocketReceipt, Mileage calculator · VAT threshold calculator · MTD Forecaster
- PocketReceipt, Sole-trader allowable expenses — full guide · MTD ITSA quarterly checklist
- PocketReceipt, Which receipt scanner app is best? 7 compared
Worked example figures are illustrative. Tax rates use 2025–26 thresholds: personal allowance £12,570; basic-rate Income Tax 20%; Class 4 NICs 6% on profits between £12,570 and £50,270, 2% above. PocketReceipt is a record-keeping app, not a tax adviser — speak to an accountant for advice on your situation.