Pet Sitter
Tax & MTD Guide
Allowable expenses, mileage, home-boarding rules, cash income, National Insurance, VAT and MTD explained for UK self-employed pet sitters and dog walkers.
Estimate your tax as a self-employed pet sitter
Adjust the figures to see your estimated Income Tax and Class 4 National Insurance for the year.
Total turnover before expenses
Under £1,000 we use the trading allowance automatically
Estimated tax bill
£892
4.7% effective rate for 2026/27
- Income tax
- £686
- Class 4 NI
- £206
Take-home pay
£15,108
after tax, NI and expenses
This is an estimate using GOV.UK rates for 2026/27, not your official tax calculation. TapTax is MTD-compatible, so you can connect to HMRC and file the real figures in a couple of taps.
- Pet sitting is a low-overhead, cash-heavy trade, so the biggest tax risk is under-recording takings (holiday cover, ad-hoc walks, cash tips) rather than missing expenses.
- Once your gross pet sitting income tops £1,000 you must register for Self Assessment; below that the trading allowance covers you and you can deduct it instead of expenses if it gives a lower profit.
- Mileage is usually your largest deduction: 45p per business mile for the first 10,000 miles then 25p, claimed via a simple log instead of working out actual vehicle costs.
- Home-boarders can claim a fair share of household running costs and need the right local-authority licence, but can never claim costs relating to their own pets.
- MTD for Income Tax starts April 2026 above £50,000, April 2027 above £30,000 and April 2028 above £20,000, and the threshold is on gross income, not profit.
Pet sitting looks like one of the simplest trades to run, and in many ways it is: low startup cost, no premises, and word-of-mouth clients in your own neighbourhood. But that simplicity hides the thing that trips sitters up at tax time. The money comes in small, frequent and often in cash, a tenner here for a lunchtime walk, fifty for a weekend of drop-in visits, a bank transfer for a fortnight of holiday boarding. When income arrives that way it is dangerously easy to lose track of, and HMRC treats unrecorded cash exactly the same as any other income.
This guide is built around how pet sitters actually earn and spend: lots of small jobs, heavy mileage between clients, kit that wears out fast, and the home-boarding rules that change your tax picture entirely. Get into the habit of logging every job and every mile as it happens, and your annual return becomes a quick tidy-up rather than a scramble.
How Tax Works for a Self-Employed Pet Sitter
As a sole trader you pay Income Tax on your profit, which is everything you take from sitting, walking and boarding minus your allowable expenses. For 2026/27 the personal allowance covers the first £12,570, then you pay 20% to £50,270, 40% to £125,140 and 45% above, with the personal allowance tapering away between £100,000 and £125,140. Class 4 National Insurance is 6% on profit between £12,570 and £50,270 and 2% above, with Class 2 NIC settled through Self Assessment, which keeps your state pension record ticking over.
Scottish pet sitters pay Scottish Income Tax through six bands (19%, 20%, 21%, 42%, 45% and a 48% top rate) and carry an S-prefixed tax code, while National Insurance stays UK-wide. Welsh sitters have a C-coded tax code at rates currently matching the rest of the UK. If you also have a part-time PAYE job, perhaps doing this around employed work, a wrong code can quietly cost you, so run it through the tax code checker.
The Trading Allowance and Starting Out
Most pet sitters start small, walking a neighbour's dog or covering holidays for a few local families. The £1,000 trading allowance is built for exactly this. If your gross self-employed income from all your pet care work is £1,000 or less in a tax year, it is tax-free and you do not need to register for Self Assessment. Cross £1,000 and you must register and report the full amount, including every cash job.
Above the threshold you choose each year. You can deduct the flat £1,000 trading allowance instead of working out actual expenses, which suits a walker with barely any costs. Or you can deduct your real allowable expenses if they total more than £1,000, which is common once mileage and insurance are in the mix. You cannot do both, so add up your costs and pick whichever leaves the lower profit. A sitter doing high mileage across a rural area usually beats the £1,000 easily once the miles are counted.
- Trading allowance
- A £1,000 tax-free allowance for casual or self-employed income. If your gross pet sitting takings are £1,000 or less in a tax year, you owe no tax on them and do not need to register for Self Assessment. Above £1,000 you must register and report the full income, then deduct either the £1,000 allowance or your actual allowable expenses, whichever gives the lower taxable profit. You cannot claim both the allowance and actual expenses in the same year.
Mileage: Usually Your Biggest Deduction
The defining cost of dog walking and pet visiting is driving. You criss-cross town between client homes, drive to off-lead parks, and shuttle dogs to boarding. Most sitters use HMRC's simplified mileage method rather than working out actual vehicle costs.
The flat rate is 45p per business mile for the first 10,000 miles in a tax year, then 25p per mile above that. It covers fuel, servicing, insurance, tax and wear and tear, so if you use it you cannot also claim those running costs separately. The alternative is the actual-cost method, where you claim the business proportion of every motoring bill, which can win for an expensive vehicle but needs far more record-keeping. For most sitters the flat rate is simpler and generous.
The discipline that matters is the log. Record every business journey with the date, where you went and the miles, ideally as you go. Driving from home, which is your business base, to a client or a regular walking spot counts as business mileage; a genuine personal detour does not. Put your real figures through the sole trader tax calculator to see how mileage cuts the bill.
Allowable Expenses for Pet Sitters
An expense is allowable when incurred wholly and exclusively for the business. Beyond mileage, a sitter's list is dominated by kit, insurance and compliance costs.
| Expense | What qualifies | Notes |
|---|---|---|
| Mileage or vehicle costs | 45p/25p per business mile, or actual running-cost proportion | Pick one method and stay consistent within the year |
| Pet care equipment | Leads, harnesses, slip leads, poo bags, treats, toys, water bowls used for clients | Items used for your own pets are not allowable |
| Insurance | Public liability, care/custody/control, key cover, equipment cover | A core cost for any professional sitter |
| DBS and checks | Enhanced DBS, ID and reference checks clients expect | Allowable where required to trade |
| Training and qualifications | Canine first aid, animal care courses, behaviour CPD | Courses that develop your existing trade |
| Licence fees | Home-boarding or day-care licence from the local council | Mandatory for boarding in your home |
| Phone and broadband | Business proportion of your bills for bookings and client contact | Exclude the private share |
| Software and apps | Booking, scheduling, GPS-tracking and invoicing app fees | Subscriptions fully deductible |
| Advertising and website | Local ads, flyers, directory listings, website and domain | Fully deductible running costs |
| Accountancy and bank fees | Bookkeeping, Self Assessment, business banking | Fully deductible |
If You Home-Board or Run Day Care
Boarding dogs or cats in your own home changes your tax picture in two ways. First, you usually need a licence from your local council under the Animal Welfare (Licensing of Activities Involving Animals) Regulations, and that fee is an allowable expense. Second, because you are using your home for the business, you can claim a fair proportion of household running costs, heat, light, water and a share of rent or mortgage interest, based on the rooms and time given over to boarding. You can also claim crates, bedding, baby gates, extra cleaning and waste disposal that exist for the boarders. The line you must not cross is your own pets: their food, vet bills and kit are personal, never business, and only the genuine business share of any dual-use cost is allowable.
What You Cannot Claim
Everyday clothing is not allowable even if you buy sturdy wet-weather gear for walks, though branded uniform or genuine protective equipment can be. The private share of your phone, broadband and vehicle must be stripped out. Your own pets' costs are personal. And ordinary commuting, if you ever had a fixed work base, would not count, though for a home-based sitter almost all driving is genuinely business.
Record-Keeping: Where Pet Sitters Win or Lose
Because so much pet sitting money is cash and the jobs are small and frequent, record-keeping is the whole game. The sitter who logs every booking, every cash payment and every mile as it happens pays the right tax and sleeps easily; the one who guesses in January either overpays or risks a problem if HMRC ever asks.
A simple routine beats any clever system: note each job the day it happens with the amount, the client and whether it was cash or transfer; bank your cash regularly so your account roughly mirrors your takings; and keep the mileage log running in the same place. Keep receipts for kit, insurance, licence and training. You must hold these records for at least five years after the Self Assessment deadline. If you also juggle a PAYE job or rental income, the multiple-income tax calculator shows how the streams stack.
For a pet sitter, the tenner you forget to record costs you more than the lead you forget to claim. Log every job and every mile as it happens, and the tax return looks after itself.
Worked Example: A Pet Sitter on £26,000
Take a home-based sitter doing daily dog walks, drop-in visits and some weekend home-boarding, with £26,000 of income for the year and 9,000 business miles driven.
Income: £26,000 (walking £12,000, drop-in visits £7,000, home-boarding £7,000)
Allowable expenses:
- Mileage: 9,000 miles at 45p = £4,050
- Insurance (public liability and care/custody/control): £320
- Leads, harnesses, poo bags, treats and toys for clients: £350
- Boarding licence, bedding, crates and extra cleaning: £500
- Home running-cost proportion for boarding: £600
- Canine first-aid course and DBS: £180
- Booking app, phone share and advertising: £600
- Accountancy and bank fees: £300
- Total expenses: £6,900
Taxable profit: £26,000 minus £6,900 = £19,100
Income Tax: £19,100 minus £12,570 = £6,530 at 20% = £1,306
Class 4 NIC: £6,530 at 6% = £392
Total tax and NIC: £1,698 for the year, plus Class 2 settled through Self Assessment. Notice how much the mileage alone does here, more than half the total deductions, which is exactly why the mileage log matters so much for this trade.
VAT for Pet Sitters
You must register for VAT once your taxable turnover passes £90,000 in any rolling 12-month period. A solo walker rarely gets near it, but a sitter who takes on staff, runs day care or scales up boarding can, so keep an eye on the rolling figure rather than your accounting year. Because almost all pet sitting customers are private individuals who cannot reclaim VAT, registering means either adding 20% to your prices or swallowing it from your margin, so voluntary registration seldom helps a consumer-facing pet business. If you do grow past the threshold, register on time, as late registration brings penalties and a backdated VAT bill.
MTD for Income Tax: What Changes for Pet Sitters
Making Tax Digital for Income Tax Self Assessment replaces the once-a-year return with quarterly digital submissions and a year-end finalisation. The thresholds are based on gross income, not profit:
- April 2026: Combined self-employment and property income over £50,000
- April 2027: Over £30,000
- April 2028: Over £20,000
For a pet sitter the upside is real. The lumpy, cash-heavy income that makes a year-end scramble so painful becomes far easier to handle when you record each job digitally as it happens and send HMRC a quarterly summary. Instead of reconstructing a year of small payments from memory and a messy bank statement, you keep a running tally. Our guide to MTD for sole traders walks through what the quarterly rhythm looks like in practice.
Common Mistakes Pet Sitters Make
Not recording cash jobs. A cash walk or weekend of cover is taxable income exactly like a bank transfer. Log it the day it happens.
Not registering once over £1,000. The trading allowance is a threshold, not a free pass. Cross it and you must register for Self Assessment, even as a sideline.
No mileage log. Mileage is often a sitter's biggest deduction, but HMRC can disallow it without a contemporaneous record. Keep the log running all year.
Claiming for your own pets. Your own animals' food, vet bills and kit are personal and never allowable, however much you also use them for demos or company.
Boarding without the licence. Home-boarding usually needs a council licence; trading without it risks penalties, and you also miss claiming the licence fee and home-use proportion.
People also ask
Pet sitter income and Making Tax Digital
If you work for yourself, Making Tax Digital for Income Tax applies to you from 6 April 2026 if your qualifying income is over £50,000, and from 6 April 2027 if it is over £30,000. TapTax keeps your digital records and sends your quarterly updates to HMRC, and it is MTD-compatible.
Start freeQuarterly expenses under MTD: the £90,000 rule
If your annual business turnover is £90,000 or less, HMRC lets you report a single consolidated expenses total in each Making Tax Digital quarterly update instead of breaking expenses down into itemised categories. Most self-employed pet sitter businesses are under this threshold, so a quarterly update can be as simple as two figures: total income and total expenses. You still need to keep digital records of each individual expense - the relaxation only changes how much detail goes into the quarterly update itself.
Related calculators and guides
More self-employed tax guides
Frequently asked questions
Do I have to pay tax on pet sitting if I only do it for a bit of extra cash?
If your gross pet sitting income is more than £1,000 in a tax year you must register for Self Assessment and declare it, even if it is a weekend sideline alongside a job. The £1,000 trading allowance lets you earn up to that amount tax-free without registering. Above it you report all the income, including cash paid for ad-hoc walks or holiday cover, then deduct either the £1,000 allowance or your actual expenses, whichever leaves the lower profit.
What expenses can a self-employed pet sitter claim?
You can claim mileage or running costs for client visits and walks, leads, harnesses, poo bags, treats and toys used for clients, insurance and DBS checks, dog first-aid and qualification courses, a share of phone and broadband, booking or scheduling app fees, advertising and website costs, and accountancy fees. If you home-board, claim a fair proportion of household running costs and the cost of bedding, crates and cleaning. Your own pet costs are never allowable.
How do I claim mileage as a dog walker or pet sitter?
Most pet sitters use HMRC simplified mileage: 45p per business mile for the first 10,000 miles in a tax year, then 25p above that. Keep a log of every client journey with the date, destination and miles. This single flat rate covers fuel, servicing, insurance and wear, so you cannot also claim those running costs separately. Driving from home to a regular pickup point can count as business mileage where home is your business base.
When does MTD for Income Tax apply to pet sitters?
Making Tax Digital for Income Tax is mandatory from April 2026 for sole traders with combined self-employment and property income over £50,000, from April 2027 above £30,000, and from April 2028 above £20,000. You keep digital records and send HMRC quarterly summaries using compatible software, then finalise the year. The test is gross income, so add up your total takings from sitting, walking and boarding, not your profit after expenses.
Does a pet sitter need to register for VAT?
Only when your taxable turnover passes £90,000 in any rolling 12-month period, which a solo sitter rarely reaches but a multi-walker or boarding business can. Most pet sitting customers are private individuals who cannot reclaim VAT, so registering would mean either adding 20% to your prices or absorbing it from your margin. Watch the rolling 12-month figure as you take on staff or more boarding, because the threshold is not based on your accounting year.
Sources
Official guidance on GOV.UK.