What Expenses Can Tradesmen Claim Against Tax?

Introduction

One of the biggest advantages of being self-employed is that you can deduct legitimate business expenses before paying tax.

Many tradesmen pay more tax than necessary simply because they don’t realise what they’re allowed to claim.

The basic rule from HM Revenue and Customs (HMRC) is simple:

An expense must be “wholly and exclusively” for business use.

When recorded properly, expenses reduce your taxable profit, which lowers the amount of Income Tax and National Insurance you pay.

If you’re not clear how profit affects your tax bill, it’s worth reading:
How Self-Employed Tax Works for Tradesmen

And if you want to understand how this impacts how much you should save:
How Much Tax Should Tradesmen Set Aside

Common Expenses Tradesmen Can Claim

Tools and Equipment

Most tradespeople spend a significant amount on tools each year.

Examples include:

• Power tools
• Hand tools
• Ladders
• Tool storage
• Safety equipment

If a tool is used purely for work, the full cost can usually be claimed.

For larger purchases, different accounting rules may apply, but the cost can still normally be offset against your profits — reducing your overall tax bill.

Materials and Consumables

Materials used for jobs are fully deductible because they are directly linked to earning income.

Examples:

• Timber
• Cable
• Fixings
• Pipework
• Adhesives
• Paint

These are some of the most commonly missed small expenses — especially items bought frequently.

Work Vehicles and Travel

Travel is a major cost for most tradesmen.

You can usually claim:

• Fuel
• Insurance
• Road tax
• Repairs and servicing
• MOTs
• Parking (for work)

Alternatively, you can claim mileage instead of actual costs — but you must stick to one method.

Poor tracking here is one of the biggest reasons tradesmen overpay tax.

Work Clothing and Safety Gear

You cannot claim everyday clothing.

But you can claim:

• Steel toe boots
• Hard hats
• Hi-vis clothing
• Gloves
• Safety goggles

These are considered essential for work and are allowable.

Insurance

Insurance is a necessary business cost.

Examples include:

• Public liability insurance
• Tool insurance
• Professional indemnity insurance

These are fully deductible and should always be included in your expenses.

Phone and Internet

If you use your phone or internet for work, you can claim a portion of the cost.

Examples:

• Business phone contracts
• Mobile usage for work
• Internet for emails, quotes, invoices

If used personally as well, you must only claim the business portion.

Professional Services

Many tradesmen use outside help to manage their business.

Examples:

• Accountants
• Bookkeeping
• Tax software
• Business bank fees

These costs are fully allowable and often save more money than they cost.

Home Office Costs

If you do admin from home, some household costs can be claimed.

Examples:

• Electricity
• Heating
• Internet
• Office equipment

Only the portion used for business should be claimed.

Why Keeping Records Matters

To claim expenses correctly, you must keep records.

HMRC requires you to keep:

• Income records
• Expense records
• Receipts
• Invoices

These should be kept for at least 5 years.

Good record-keeping makes your Self Assessment far easier and ensures you don’t miss deductions.

Common Expense Mistakes Tradesmen Make

Many tradesmen overpay tax simply due to poor tracking.

Common mistakes:

• Losing receipts
• Forgetting small purchases
• Not tracking fuel properly
• Mixing personal and business spending

These mistakes directly increase your tax bill.

How Expenses Reduce Your Tax (Simple Example)

Let’s say:

• Income = £50,000
• Expenses = £15,000

Taxable profit = £35,000

You only pay tax on the £35,000 — not the full £50,000.

If you don’t understand this properly, it’s easy to overestimate or underestimate your tax bill.

How Self-Employed Tax Works for Tradesmen

Why This Matters for Tax Planning

Understanding expenses isn’t just about saving tax.

It’s about knowing how much money is actually yours.

Without this, it’s easy to:

• Overspend
• Under-save
• Get caught out by your tax bill

Which is why most experienced tradesmen follow a simple rule:
How Much Tax Should Tradesmen Set Aside

Final Thoughts

Understanding what you can claim is one of the easiest ways to reduce your tax bill.

Most tradesmen don’t have a tax problem — they have a record-keeping problem.

Track properly, and your tax bill becomes predictable.

Ignore it, and you’ll almost always overpay.

Key Takeaways

• Expenses reduce your taxable profit
• Must be “wholly and exclusively” for business
• Keep records for at least 5 years
• Small expenses add up quickly
• Tracking properly prevents overpaying tax