Sole Trader Tax Tips for Tradespeople — What You Can Claim to Keep More of What You Earn

As a sole trader in the UK, you pay Income Tax on your profit — not your turnover. Your profit is your total income minus your allowable business expenses. Every pound of legitimate expense you claim reduces your taxable profit by a pound, which reduces your tax bill directly.

For a sole trader earning £45,000 a year and paying 20% Income Tax plus Class 4 National Insurance, every additional £1,000 of legitimate expense you claim saves you roughly £290 in tax. Most tradespeople leave thousands of pounds of unclaimed expenses on the table every year purely because they didn't track them properly.

Materials and Stock

Every material you buy and use on a client job is an allowable business expense — copper pipe, cable, plasterboard, adhesive, paint, fixings, consumables. This is the biggest expense category for most tradespeople and also the most commonly under-tracked.

The key is having a record: a receipt, a bank statement entry, or a logged material cost in a job tracker. HMRC can ask you to prove any expense you claim. If you have no receipt and no record, you cannot claim it — even if you genuinely spent the money.

Don't forget van stock consumables — the small items you carry and use on jobs. Many tradespeople never claim these because they lose track. Log every allocation and you'll build up a legitimate expense record automatically.

Vehicle and Mileage Costs

This is where most sole traders have two options, and choosing the wrong one can cost you hundreds of pounds a year.

You must choose one method and stick with it for the life of that vehicle. If you use Method A (mileage), you cannot switch to Method B later. Most tradespeople with a dedicated van are better off with actual costs because a van doing 25,000 business miles a year at 45p/25p gives you about £11,250 — but actual costs including fuel, insurance, servicing, and capital allowances on a £20,000 van often exceed £14,000–£18,000.

Either way, a detailed mileage log is essential. HMRC expects you to be able to show the date, destination, purpose, and miles for each business journey if asked.

Fuel Receipts vs. Mileage Claims: How to Calculate Fuel Receipts Tax as a UK Sole Trader

If you are trying to figure out how to calculate fuel receipts tax as a sole trader in the UK, the process depends entirely on which vehicle claim method you choose:

• If you claim the HMRC flat mileage rate (45p/25p): You do not claim your fuel receipts. The 45p per mile flat rate is designed to cover fuel, insurance, road tax, and wear-and-tear. You simply log your business mileage and multiply it by the rate.
• If you claim Actual Costs: You can claim the business proportion of your actual fuel receipts. To calculate this:
  1. Keep every fuel receipt (HMRC requires proof of purchase).
  2. Log your total annual mileage and your business-only mileage.
  3. Calculate your business percentage: (Business Miles / Total Miles) * 100.
  4. Multiply your total fuel expenditure by this percentage. For example, if you spent £3,000 on fuel and 80% of your mileage was business-related, you can claim £2,400 as an allowable tax deduction.

Tools, Equipment, and Plant

All tools you buy for your trade are claimable. For most sole traders this is covered by the Annual Investment Allowance (AIA), which lets you deduct the full cost of equipment in the tax year you buy it (up to £1 million per year — more than enough for any sole trader).

• Drills, circular saws, grinders, multi-tools, SDS hammers
• Multi-meters, test equipment, pipe detectors, thermal cameras
• Ladders, platform steps, scaffold towers
• Pressure testing equipment, leak detection equipment
• Pipe benders, press tools, crimping tools
• Generator, compressor, wet/dry vacuum
• Tool bags, cases, van racking and shelving
• Laptop or tablet used for job management, quoting, invoicing

Keep the receipt or invoice for every tool purchase. A photo of the receipt uploaded to your job tracker is perfectly valid as a record.

Mobile Phone and Broadband

If you have a business-only mobile phone, you can claim 100% of the cost — the handset (if purchased outright or via capital allowances), the monthly contract, and all calls and data.

If you use a personal mobile for both work and personal use (which most sole traders do), you can claim the business proportion only. A reasonable estimate is typically 50–80% business use for a tradesperson whose phone is used heavily for client communication, quoting, and job management. Be prepared to justify your percentage if asked.

Home broadband is claimable at the business proportion if you use it for admin, quoting, and invoicing — typically 20–30% for most tradespeople.

Professional Subscriptions, Insurance, and Registrations

Any subscription or registration that is a condition of your trade, or that is relevant to your professional duties, is fully claimable:

Accountancy fees are fully claimable — the cost of your accountant preparing your self-assessment is itself a deductible expense.

Work Clothing and PPE

Protective and specialist work clothing is claimable. This includes boots, hard hats, hi-vis vests, gloves, safety glasses, overalls, and kneepads. The rule is it must be protective or a recognisable uniform — not everyday clothing that you happen to wear to work.

You cannot claim ordinary clothing (jeans, T-shirts, hoodies) even if you only wear them for work. HMRC is clear on this. But PPE and branded workwear with a company logo are fully claimable.

Working from Home

If you do admin, quoting, invoicing, or bookkeeping from home (as most sole traders do), you can claim a proportion of your home running costs. HMRC offers two approaches:

Advertising and Marketing

All marketing costs are fully deductible:

• Website hosting and domain name registration
• Business software subscriptions (job management apps, accounting software)
• Google Ads or Facebook Ads
• Business cards, leaflets, van signwriting
• Checkatrade, MyBuilder, Rated People subscriptions
• Directory listing fees

The Record-Keeping Problem — Why Most Tradespeople Under-Claim

Knowing what you can claim is only half the battle. You also have to prove it. HMRC can investigate any self-assessment return up to 4 years after submission (or 20 years if they suspect fraud). If you claim an expense and can't produce evidence — a receipt, invoice, or bank statement — it will be disallowed and you'll owe the tax plus interest and potentially penalties.

The practical problem for tradespeople is obvious: receipts get lost, fade in sunlight on the dashboard, get soaked in the rain, or end up crumpled in tool bags. A receipt on thermal paper left in a warm van for three months can fade to blank.

• Photograph receipts immediately. As soon as you get a receipt, photograph it with your phone. A digital photo is accepted by HMRC as evidence. Don't wait until you get home.
• Log materials against jobs in real time. Use a job tracker that records the item, cost, supplier, and job reference. This creates an automatic audit trail for every material expense.
• Keep a mileage log. For every business journey: date, start point, destination, purpose, and miles. If you use the mileage rate method, this log is your only evidence.
• Separate business and personal spending. A dedicated business bank account makes it far easier to identify all business expenses at year-end. It also looks much cleaner to an accountant.

Quick Reference: Allowable Expenses Checklist for Sole Trader Tradespeople

How VanLog Helps You Claim More at Tax Time

VanLog is built to solve the record-keeping problem automatically. Here's what it does for your self-assessment:

• Every material you log against a job is a documented expense — item, cost, supplier, date, and job reference. Your accountant can pull a clean export for the tax year.
• Mileage log with automatic value calculation — every journey is recorded with date, miles, and the calculated value at your local tax authority approved rate. Year-end summary generated automatically.
• AI receipt scanner (Pro) — photograph any supplier receipt and VanLog extracts and records all items and costs automatically. No more lost receipts.
• Van stock allocations — every time you assign van stock to a job, the cost is logged as a material expense on that job. Your consumables are automatically tracked and documented.

Related Guides

• → How to Claim Mileage as a Sole Trader Tradesperson — HMRC, ATO and Regional Rates
• → Why Sole Traders Lose Money on Materials — And How to Stop It
• → How to Manage Van Stock as a Tradesperson
• → How to Calculate True Job Profit as a Sole Trader