Allowable Expenses for UK Sole Traders 2026: The Complete Guide

Most sole traders pay too much tax. Not because they want to — because they don't claim everything they're entitled to claim.

It's understandable. HMRC's expense rules are scattered across dozens of guides, written in language that assumes you already know the difference between an "allowable expense" and a "capital allowance." So most freelancers play it safe, claim the obvious stuff, and quietly hand HMRC a few hundred extra pounds every year.

This guide is the opposite of safe. It walks through every category of expense a UK sole trader can claim, explains what HMRC actually allows, and flags the grey areas where people either over-claim (and get caught) or under-claim (and overpay).

If you're filing your 2025/26 Self Assessment, or you're moving into Making Tax Digital from April 2026, this is the reading you wish you'd done a year ago.

The one rule that decides everything

Before we get into specific categories, you need to understand the rule HMRC uses to evaluate every single expense claim:

An expense must be "wholly and exclusively" for your business.

That's it. Six words. They appear in HMRC's Business Income Manual, and they're the lens through which every claim is judged.

• Wholly: The cost was incurred only for the business
• Exclusively: The sole purpose of the expense was business

If a cost has a "dual purpose" — meaning it benefits both your business and your personal life — and you can't separate the two, it's disallowed entirely. Not partially. Entirely.

The classic example: a suit. You need a suit for client meetings. But a suit also provides "warmth and decency" — a personal benefit you'd need even if you didn't run a business. So even if you only ever wear that suit to meet clients, you can't claim a penny of it. HMRC doesn't care how rarely you wear it socially.

The exception: when a cost can be split cleanly. A mobile phone bill, for instance, can usually be apportioned by usage — 70% business calls, 30% personal calls means you claim 70% of the bill. This works because the split is identifiable. The suit doesn't, because you can't say "I needed 60% of a suit for work."

This rule trips people up because intuition says "if I use it for business, I should claim it." HMRC's logic is the opposite — "if you'd have needed it anyway, you can't claim it."

Keep this lens active as you read the rest of this guide. Every category below comes back to "wholly and exclusively."

Office costs and supplies

This is the easiest category. Anything you buy specifically for running your business — and that has no plausible personal use — is fully allowable.

Definitely allowable:

• Stationery, printer ink, paper, pens
• Office software subscriptions (Microsoft 365, Adobe Creative Cloud, Notion, Slack, project management tools)
• Cloud storage and backup services (Dropbox, Google Drive, iCloud business plans)
• Domain name renewals and web hosting
• Email marketing platforms (Mailchimp, Beehiiv, ConvertKit)
• Dedicated business phone bills (if the line is in the business name)
• Accounting and bookkeeping software
• Business banking fees
• Postage and courier costs

Watch out for:

• A laptop, phone, camera, or anything else over £200 is usually not "office supplies" — it's a capital asset, claimed differently (see capital allowances below)
• Software you'd have anyway (e.g. a personal Spotify subscription) — not allowable, even if you sometimes use it while working
• "Cloud" services that are genuinely shared with personal use (e.g. iCloud storage holding both family photos and work files) — allowable in proportion only if you can demonstrate the split

For mixed-use software, the practical approach is: separate accounts where possible. If you run your business through one Notion workspace and your personal life through another, you can cleanly claim the business one. If everything's in one account, the apportionment becomes messy and HMRC will challenge a 100% claim.

Working from home

This is one of the most under-claimed categories — partly because the rules look complicated, and partly because most freelancers don't realise how generous the simplified version is.

You have two methods to choose from. You can use whichever gives a better result, but you have to use the same method consistently across the year.

Method 1: HMRC simplified flat rate (easy)

If you work from home for at least 25 hours a month, you can claim a fixed monthly amount based on hours:

| Hours worked from home per month | Flat rate | |----------------------------------|-----------| | 25–50 hours | £10/month | | 51–100 hours | £18/month | | 101+ hours | £26/month |

For a freelancer working from home full-time, that's £312 a year — straight off your taxable profit. No receipts. No utility bills. No calculations. You just need to keep a basic record of hours worked.

The flat rate covers heating, electricity, council tax, and rent/mortgage interest contributions. It does not cover phone, internet, or business-specific equipment — those are claimed separately.

Method 2: Actual cost apportionment (harder, sometimes more)

If you have high household running costs and a clearly defined work area, the actual cost method may give a bigger deduction.

You take your total household running costs (utilities, council tax, rent or mortgage interest, insurance) and apportion them based on:

• The number of rooms in your house used for business (kitchens, bathrooms, and hallways don't count)
• The amount of time those rooms are used for business

Example: You have a 6-room house (lounge, 3 bedrooms, dining room, dedicated office). One room is your office. You work there 8 hours a day, 5 days a week.

• Rooms used for business: 1 of 6 = 16.6%
• Time used for business: 40 hours of 168 = 23.8%
• Combined: 16.6% × 23.8% ≈ 4% of household costs

If your annual household running costs are £6,000, you'd claim about £240 — possibly less than the simplified rate.

For most full-time freelancers in modest homes, the simplified rate is bigger and infinitely easier. The actual cost method only beats it if you have either a large dedicated workspace or particularly high utility bills.

A warning about exclusive business use

If you claim that a room in your home is exclusively used for business, HMRC may treat that portion of the property as a business asset. When you sell the house, that portion may not qualify for Private Residence Relief — meaning you could owe Capital Gains Tax on it.

This is why most accountants advise: claim the simplified rate, or apportion actual costs based on mixed use of rooms (you also use the office for occasional personal browsing). Don't claim "100% business use" of a room unless you've thought carefully about the long-term implications.

Vehicle and travel costs

This is where freelancers leave the most money on the table — usually because they don't track mileage.

Like working from home, you have two methods. Pick one and stick with it for the lifetime of the vehicle. You can't switch year to year.

Method 1: HMRC mileage allowance (simplified)

The simplest way to claim vehicle costs is the Approved Mileage Allowance:

| Vehicle type | First 10,000 miles per tax year | Over 10,000 miles | |--------------|--------------------------------|-------------------| | Car or van | 45p per mile | 25p per mile | | Motorcycle | 24p per mile | 24p per mile | | Bicycle | 20p per mile | 20p per mile |

You also get +5p per mile per business passenger — i.e. if you drive a colleague to a client meeting, you can claim 50p per mile for that journey, not 45p.

Worked example: You're a freelance designer who drives 8,000 business miles in your car during 2025/26.

• 8,000 × 45p = £3,600 deducted from your taxable profit

If you're a basic-rate taxpayer paying 20% income tax + 6% Class 4 NI, that's a real-world tax saving of around £940.

These rates haven't changed since 2011 and are designed to cover everything — fuel, insurance, road tax, servicing, depreciation, wear and tear. You can't claim mileage AND fuel receipts AND servicing AND insurance separately. Pick the simplified rate or the actual cost method, not both.

Method 2: Actual costs (more admin, sometimes more)

You add up all actual vehicle running costs (fuel, insurance, servicing, MOT, depreciation via capital allowances) and claim the business-use proportion.

If you drive 14,000 miles total — 9,000 business and 5,000 personal — your business-use proportion is 64%. You claim 64% of every cost.

This method tends to favour high-mileage drivers, especially with expensive vehicles. For most freelancers, the simplified mileage rate is easier and often bigger.

What counts as business mileage

Only journeys "wholly and exclusively for business" qualify. The boundary catches a lot of people out:

Allowable:

• Travel to a client's office or site
• Travel to a temporary workplace
• Travel between two business locations
• Travel to deliver work or pick up materials

Not allowable:

• Commuting — travel between your home and your normal workplace, even if you only go in once a week
• Personal errands during a business trip (the business portion is allowable, the detour isn't)
• Travel to your "regular" co-working space if you treat it as your base

If you work from home most of the time and visit clients in different locations, virtually all your business journeys are allowable — because you don't have a permanent workplace to commute to. This is the most common case for modern freelancers.

Keep a mileage log

HMRC requires you to keep records of every business journey:

• Date
• Start and end location
• Purpose of the trip
• Total miles

A spreadsheet, paper logbook, or mileage app (Driversnote, MileIQ) all work. Keep these for 5 years after the tax filing deadline in case HMRC queries them.

Other travel — train, plane, taxi, hotel

Travel that isn't mileage is straightforward:

Allowable:

• Train, bus, plane, taxi fares for business travel
• Parking and tolls (during business journeys)
• Hotel costs when staying overnight for business
• Reasonable subsistence costs (food and drink) when travelling for business — but only if it's outside your normal routine

Not allowable:

• A sandwich at your desk during a normal working day
• Entertainment costs (more on this below)
• Travel to your regular workplace

The "outside normal routine" rule is important. If you regularly travel to a particular client's office, that's not "business travel" anymore — it's a commute, and food costs there aren't claimable. If you make a one-off trip to Edinburgh for a meeting, the train, hotel, and meals are all in scope.

Equipment, computers, and capital allowances

Anything that lasts more than a year and costs more than around £200 is usually a capital asset, not an "expense." It's claimed through capital allowances rather than as a regular cost.

For most sole traders, the relevant scheme is the Annual Investment Allowance (AIA), which lets you deduct the full cost of qualifying equipment from your profits in the year you bought it. The AIA limit is currently £1 million per year — far above what any sole trader will ever hit.

What counts as a capital asset

• Computers, laptops, tablets, phones (over £200)
• Cameras, lenses, audio equipment (for content creators)
• Tools and machinery
• Office furniture (desks, chairs, filing cabinets)
• Vans (cars are different — see below)

Cars are special

Cars don't qualify for AIA. Instead, you use Writing Down Allowances — a much slower deduction over multiple years, with the rate depending on the car's CO2 emissions. For most sole traders using a personal car for business, you're better off using the mileage allowance method and not claiming the car as a capital asset at all.

Vans are different — they're treated as plant and machinery and qualify for full AIA.

What if you bought an asset before going self-employed?

If you owned a laptop or camera before you started your business and now use it for work, you can introduce it to the business at its current market value and claim capital allowances on that figure. You don't get to claim what you originally paid — just what it's worth now.

Mixed-use equipment

Same rule as everything else: apportion by business use. A laptop used 80% for business and 20% for personal browsing — claim 80% of the cost as AIA.

Be realistic about percentages. Claiming 100% business use on a laptop that obviously has Spotify, Netflix, and a Steam library installed will not survive an HMRC enquiry.

Marketing and advertising

This is one of the cleaner categories — easy to track, hard to misclaim.

Allowable:

• Website costs (domain, hosting, SSL certificates, themes)
• Online advertising (Google Ads, Meta ads, LinkedIn ads)
• Print advertising (flyers, business cards, banners)
• SEO and content marketing services
• PR services
• Branded merchandise given to clients (small items)
• Photography and videography for marketing materials

Not allowable:

• Branded clothing for personal wear (unless it's protective or has prominent business branding and is genuinely uniform)
• Lavish entertainment dressed up as "marketing"
• Sponsorship that primarily benefits a personal connection (HMRC scrutinises sponsorship deals carefully — they need a clear business benefit)

Marketing tools and software subscriptions (CRMs, email platforms, analytics tools) are typically claimed under "office costs" rather than marketing, but the result is the same — they're allowable.

Professional fees and subscriptions

Fees you pay for professional services and memberships:

Allowable:

• Accountant or bookkeeper fees (including self-assessment filing)
• Legal fees relating to business matters (contract review, dispute resolution)
• Professional indemnity insurance, public liability insurance, business contents insurance
• Membership fees to professional bodies (BCS, ACCA, RICS, etc.) — but only if HMRC has approved the body
• Trade union or professional association fees
• Subscriptions to industry magazines or trade publications

Not allowable:

• Legal fees for personal matters (divorce, will writing, personal property)
• Membership of clubs or societies that aren't on HMRC's approved list
• Health insurance for yourself (unless specific protective cover required for work)

HMRC publishes an approved list of professional bodies whose fees are tax-deductible. If your professional body isn't on it, you can't claim the membership.

What you can NEVER claim

Some things are off-limits no matter how much they feel like business expenses. Trying to claim these is the fastest way to invite an HMRC enquiry.

Entertainment

You cannot claim for taking clients out for lunch, dinner, drinks, or any form of hospitality — even if 100% of the conversation was about business. UK tax law specifically blocks "business entertainment" deductions for both income tax and VAT purposes.

The one exception: staff entertainment (annual party for employees, up to £150/head). But sole traders without staff don't have this option.

Ordinary clothing

Even clothing you only wear for work isn't claimable, because it provides "warmth and decency" — a personal benefit. The exceptions are tightly defined:

• Protective clothing (high-vis, hard hats, steel-toe boots, lab coats)
• Branded uniform with prominent, permanent business branding (not just a small logo on a polo shirt)
• Costumes for performers and actors

A freelance accountant cannot claim a suit. A self-employed plumber can claim overalls. A musician can claim stage costumes. The line is "would you wear this in everyday life?"

Fines and penalties

Parking tickets, speeding fines, late filing penalties, court fines — none are claimable, even if incurred during a business trip.

Personal expenses

Food (unless travelling), childcare, gym memberships, holidays, personal grooming. These are personal, full stop.

Charitable donations (but check Gift Aid)

Donations to charity aren't business expenses, but you can claim Gift Aid relief through your personal Self Assessment if you're a higher-rate taxpayer.

What changes from April 2026

If you're earning over £50,000 (qualifying income), you're moving into Making Tax Digital for Income Tax from April 2026. Most expense rules stay the same, but how you record and report them changes:

• Every transaction has to be recorded digitally (not on paper or in unlinked spreadsheets)
• Quarterly summaries to HMRC instead of one annual return (see our practical guide to MTD quarterly updates for how cumulative reporting actually works)
• Receipts need to be captured digitally — most software does this via phone OCR
• The same allowable/not-allowable rules apply, but real-time categorisation becomes much more important

For the full breakdown of MTD changes, read our complete guide: Making Tax Digital for Income Tax 2026.

If you're not earning over £50,000, you're staying on traditional Self Assessment for 2025/26 — which we covered in our Sole Trader Self Assessment 2026 guide.

If your turnover crosses £90,000, you also enter the VAT regime, which changes how expenses are recorded (you reclaim input VAT separately rather than expensing the gross amount). See our VAT for small businesses 2026 guide for the full picture.

Record-keeping requirements

HMRC requires you to keep records of all expenses for at least 5 years after the 31 January filing deadline (so a 2025/26 return needs records kept until 31 January 2032).

What "records" actually means:

• The original receipt or invoice (paper or digital)
• The date of the transaction
• A description of what it was for
• The business purpose (especially for mixed-use items)
• The amount paid

Photographing paper receipts on your phone is fine — HMRC accepts digital images. The key is they must be legible. Faded thermal receipts that you can no longer read are useless if HMRC queries them.

For mixed-use expenses, write the business purpose on the receipt photo (most apps let you add notes). "70% business — used for client work" is a much stronger record than just a photo of a phone bill.

A practical claim checklist

Here's what a sole trader should be tracking, monthly, to maximise legitimate claims:

| Category | What to capture | |----------|----------------| | Software subscriptions | Receipts and recurring charges | | Phone & internet | Monthly bills + business use % | | Working from home | Hours worked from home each month | | Mileage | Date, route, purpose, miles | | Travel | Tickets, parking receipts, hotel invoices | | Equipment | Receipts for anything over £200 | | Marketing | Ad spend, hosting, design fees | | Professional fees | Accountant bills, insurance premiums | | Subscriptions | Trade body memberships, professional publications | | Bank fees | Business account charges |

If you set up your accounting software properly with bank feeds, most of this captures itself. Receipts get photographed once and attached to the matching transaction. The mileage log is the one thing you have to do actively — most apps let you log a journey in 30 seconds.

How Get Clarity helps

Get Clarity is built around the way modern freelancers actually work — receipts captured on phone, transactions categorised automatically, expenses ready for tax time without weekend reconstruction sessions:

• Open Banking integration through TrueLayer pulls transactions from your business bank account automatically and categorises them based on patterns it learns from you
• Receipt OCR through the mobile app — photograph, parse merchant and amount, attach to transaction, done
• AI Copilot answers questions like "how much have I claimed on travel this quarter?" or "am I close to the VAT threshold?" without you digging through reports
• Mileage tracking built in, with HMRC-rate calculations and 5-year record retention

Whether you're filing your first Self Assessment or preparing for MTD ITSA from April 2026, Get Clarity handles the workflow. Learn more at the homepage or browse our blog for more guides like this one.

The bottom line

Most sole traders pay too much tax — not from choice, but from missed claims. A few hundred miles of unrecorded business driving, a working-from-home allowance never claimed, a mixed-use software subscription written off as personal, an equipment purchase treated as a regular expense instead of a full AIA deduction.

Three habits will fix most of this:

1. Photograph every receipt the moment you get it. Don't wait until Sunday. The £14 lunch on a client visit is allowable; the £14 lunch you can't remember the purpose of, six months later, isn't.

2. Log mileage as you drive. A 30-second entry in a phone app is the difference between £900 in tax savings and £0.

3. Apply "wholly and exclusively" honestly. Every claim should pass the test of: "If HMRC asked me why this is a business expense, could I give a clear answer?" If yes, claim it. If you have to invent the answer, leave it out.

The aim isn't to claim everything imaginable — it's to claim everything you're entitled to. For most sole traders, doing that properly cuts their tax bill by £500–£2,000 a year.

That's not financial trickery. That's just paying the right amount.

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This guide is for informational purposes only and does not constitute tax or financial advice. For advice specific to your circumstances, speak to a qualified accountant or tax adviser. HMRC rates, rules, and approved professional bodies may change — always check the latest position on gov.uk.