CIS, mileage, tools and every claimable expense explained for handymen doing dozens of small domestic jobs.
The tax trap most handymen fall into has nothing to do with forgetting to file a return. It is treating every job the same when HMRC does not. A morning fitting a new door frame on a building site may fall under the Construction Industry Scheme (CIS), meaning the contractor deducts tax before they pay you. The same afternoon spent assembling flat-pack furniture or touching up scuffed skirting boards for a private household sits completely outside CIS. Getting that split wrong is the single most expensive mistake in this trade, and this guide will help you get it right.
Handymen also have a genuinely unusual income profile: dozens of small jobs across the year, a constant stream of short van journeys, consumables bought from the trade counter every other day, and a tool kit that spans every discipline from basic joinery to plastering. None of the standard self-employed guides cover that reality particularly well. This one does.
As a sole trader you pay Income Tax on your profits (income minus allowable expenses), not on your turnover. You also pay Class 4 National Insurance Contributions: 6% on profits between GBP 12,570 and GBP 50,270, then 2% above that. Class 2 NICs were effectively abolished from April 2024, so there is no flat weekly charge to worry about separately.
You report everything through Self Assessment, filing your tax return by 31 January following the end of the tax year. If you do not already file a return, you must register with HMRC by 5 October in the second year of trading. Use the sole trader tax calculator to estimate your bill before the return is due, so you are not caught short in January.
If your total self-employment income is GBP 1,000 or less in a tax year, the trading allowance means you owe no tax and do not need to file a return for that income. Above GBP 1,000, it is almost always better to claim actual expenses rather than the trading allowance, because genuine handyman costs will far exceed GBP 1,000.
This is the tax question that most handymen get wrong, and it matters because an incorrect CIS deduction either leaves money in HMRC's hands unnecessarily or, worse, means a contractor fails to deduct when they should, creating a liability for both parties.
CIS applies when work falls within the definition of "construction operations" under the Finance Act 2004: new structures, alterations, repairs to structures, installation of systems (plumbing, electrics, heating), demolition and site preparation. If a contractor hires you to repair cracked render on a rental property they are renovating, or to hang internal doors as part of a build-out, that is CIS-able work.
CIS does NOT apply to:
In practice, many handymen do a mix of both. If a contractor is paying you, ask explicitly whether they are operating CIS. If they are, register as a CIS sub-contractor with HMRC so the deduction is 20% rather than 30%, and keep a statement of every deduction (your "deduction statement") because those sums offset your final tax bill. Use the CIS tax calculator to see how deductions map against what you will ultimately owe.
Never offset CIS deductions you have suffered against expenses on your return. The deductions sit on the tax-and-NIC payable side of the calculation, not the income side.
The breadth of a handyman's tool kit is matched only by the breadth of the expenses you can legitimately claim. Every item below must be "wholly and exclusively" for the business, which in practice means used for paid work, not for projects at your own home.
| Expense Category | What Counts | Notes |
|---|---|---|
| Tools and equipment | Drills, sanders, levels, saws, ladders, multi-tools | Replace frequently? Running cost. One-off larger item? May be a capital allowance claim. |
| Consumables, fixings and small materials | Screws, rawl plugs, filler, sandpaper, sealant, tape | Amounts bought for stock and later used on jobs are deductible as used |
| Materials passed on to customers | Timber, plasterboard, paint bought specifically for a job | Deductible in full; also count toward VAT-registration turnover |
| Van or vehicle costs | Fuel, insurance, servicing, MOT, road tax | Claim actual costs (keep all receipts) OR the HMRC mileage rate |
| Mileage between jobs | 45p per mile for first 10,000 business miles; 25p above that | Home-to-first-job is NOT claimable unless home is genuinely your base |
| Public liability insurance | Annual premium | Essential for domestic work; fully deductible |
| Work clothing and PPE | Hi-vis, steel-toe boots, gloves, overalls, dust masks | Must be protective or a uniform, not ordinary clothing you could wear elsewhere |
| Advertising and listing fees | Checkatrade, Rated People, MyBuilder, local leaflets | Fully deductible |
| Phone and booking apps | The business proportion of your mobile contract; scheduling or invoicing apps | Keep a record of the business-use percentage if the phone is also personal |
| Training and trade subscriptions | Short courses keeping skills current | Deductible if updating existing skills, not acquiring a new trade from scratch |
| Accountant or bookkeeping software | TapTax, accounting app subscriptions | Fully deductible |
For a handyman doing six to eight short jobs a day, mileage adds up fast. The mileage tax calculator will convert your annual business miles into an exact deduction figure. If you drive 8,000 business miles in a tax year, that is GBP 3,600 off your taxable profit (8,000 x 45p), with zero need to keep fuel receipts. You must choose at the start whether to claim mileage or actual vehicle costs; you cannot switch mid-year for the same vehicle.
If you use a van and claim actual costs rather than mileage, you can use the Annual Investment Allowance to write off the full purchase cost of the van in the year you buy it, providing immediate tax relief rather than depreciating it over several years.
Take a handyman completing dozens of small domestic jobs across the year, turning over GBP 24,000. Here is how their tax position might look:
| Amount | |
|---|---|
| Gross turnover | GBP 24,000 |
| Less: consumables and small materials | GBP 1,800 |
| Less: mileage (7,000 miles x 45p) | GBP 3,150 |
| Less: tools (replacement and new) | GBP 900 |
| Less: public liability insurance | GBP 400 |
| Less: advertising (Checkatrade listing) | GBP 600 |
| Less: phone (business proportion 70%) | GBP 420 |
| Less: PPE and work clothing | GBP 200 |
| Taxable profit | GBP 16,530 |
| Personal allowance | GBP 12,570 |
| Taxable income | GBP 3,960 |
| Income Tax at 20% | GBP 792 |
| Class 4 NIC at 6% on profit above GBP 12,570 | GBP 237 |
| Total tax and NIC due | GBP 1,029 |
On GBP 24,000 of turnover, this handyman pays just over GBP 1,000 in tax and NICs. The mileage deduction alone (GBP 3,150) is probably the single biggest line on that expense sheet, which is exactly why tracking every business journey is worth the two minutes a day it takes in a mileage log.
For most handymen under £30,000 turnover, the mileage deduction and consumables together bring taxable profit well inside the personal allowance, meaning little or no income tax. Class 4 NICs are still due on profits above £12,570.
The VAT registration threshold is GBP 90,000 of taxable turnover in a rolling 12-month period. Most self-employed handymen work at lower volumes than this, but the important detail is that materials you buy and charge on to a customer count as your turnover, not just your labour. If you supply GBP 800 of timber for a job and charge the customer GBP 1,000 for labour, your turnover for that job is GBP 1,800, not GBP 1,000. This is unlikely to push a typical handyman over GBP 90,000, but worth monitoring if your business grows or you take on larger project work.
Voluntary VAT registration is rarely worthwhile for a handyman whose customers are primarily private individuals, because those customers cannot reclaim VAT and will simply see a 20% price increase.
Making Tax Digital for Income Tax (MTD for IT) replaces the annual Self Assessment return for most sole traders. From April 2026, if your self-employment and property income exceeds GBP 50,000, you must use MTD-compatible software and submit quarterly updates to HMRC. From April 2027, the threshold drops to GBP 30,000.
For the majority of handymen, those thresholds mean MTD is not immediate, but it is coming. The practical upside is that software like TapTax keeps your income and expense records in real time, so you always know your approximate tax bill rather than discovering it in January. Read the full MTD for sole traders explainer for a clear breakdown of what the quarterly updates involve and what deadlines replace the old 31 January filing date.
Starting digital records now, even before you are mandated, saves a significant amount of scrambling later and makes the transition straightforward.
Conflating all jobs as either CIS or non-CIS. This is the biggest and most costly error. A handyman who treats their entire income as CIS-exempt risks a contractor failing to make deductions that HMRC will later chase. Conversely, one who assumes all work is CIS-able may under-claim their tax credit or confuse their accounts. Break your income into: jobs paid by contractors for construction tasks (CIS may apply), and jobs paid directly by homeowners or businesses for general repairs and odd-jobs (CIS does not apply). Keep separate records.
Claiming the home-to-first-job journey as a business mile. If you live at home and drive to your first customer, that commute is not a business mile under HMRC rules. The business journey starts when you leave your first job for the next one.
Forgetting consumables bought in bulk. Handymen often buy screws, fixings, filler and adhesive in bulk from a trade counter and then use them across multiple jobs without keeping receipts. Those receipts are real money: GBP 1,800 of consumables in the worked example above saved GBP 216 in basic-rate tax alone.
Mixing materials passed on to customers with personal purchases. Keep a separate card or account for trade materials. It makes the allowable deduction clear and avoids arguments with HMRC about whether a tin of paint was for a customer or your kitchen.
Missing the Self Assessment registration deadline. If you started self-employment during the 2024/25 tax year, you must register with HMRC by 5 October 2025. Missing this does not remove the tax liability; it just adds potential penalties on top of it.
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