Allowable expenses, vehicle and equipment costs, CIS deductions, VAT and MTD for Income Tax explained for UK self-employed driveway and patio sealing contractors.
Driveway sealing is a deceptively simple trade with a fiddly tax profile. The work itself is physical and seasonal: pressure-washing block paving, letting it dry, brushing kiln-dried sand into the joints, then rolling or watering on a sealant for that glossy wet-look finish. But behind the jobs sits a mix of homeowner work paid in full and subcontract work for builders and landscapers where money arrives net of a tax deduction. That split is where a lot of sealers either overpay or fall foul of HMRC.
This guide is built around how a sealer actually earns and spends: heavy material and van costs, equipment bought outright, the Construction Industry Scheme on subcontract jobs, and the seasonal cash flow that makes setting tax aside so important. Get your records right as the jobs land and the annual return stops being a scramble.
As a sole trader you pay Income Tax on your profit, which is your total takings minus allowable expenses. For 2025/26 the personal allowance covers the first GBP 12,570, then you pay 20% to GBP 50,270, 40% to GBP 125,140 and 45% above, with the allowance tapering away between GBP 100,000 and GBP 125,140 to create an effective 60% band. Class 4 National Insurance is 6% on profit between GBP 12,570 and GBP 50,270 and 2% above, and Class 2 NIC is settled through Self Assessment.
Scottish sealers 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 sealers have a C-coded tax code at rates currently matching the rest of the UK. If your code looks wrong, perhaps because CIS deductions or a part-time PAYE job are distorting it, run it through the tax code checker.
Many sealers start with a few weekend jobs while keeping another income. The GBP 1,000 trading allowance is built for this. If your gross self-employed income from all sealing work is GBP 1,000 or less in a tax year, it is tax-free and you do not need to register for Self Assessment for it. Cross GBP 1,000 and you must register and report the full amount.
For a sealer, though, the allowance rarely helps once you are properly working. Sealant, sand and van fuel alone usually dwarf GBP 1,000, so claiming your real expenses almost always leaves a lower profit than deducting the flat GBP 1,000. The allowance matters mainly in your very first weeks, before the costs and the jobs scale up. You cannot claim both the GBP 1,000 and actual expenses, so once you have real outgoings, claim the actuals.
This is the part most sealers get wrong. If you carry out sealing, repointing, resurfacing or paving repairs as a subcontractor for a contractor, a builder, a landscaping firm or a paving company, the work usually falls inside the Construction Industry Scheme. The contractor must deduct tax from the labour part of your invoice before paying you and hand it to HMRC.
When you work directly for a homeowner, there is no CIS deduction at all, because a private householder is not a contractor. So a sealer with a mix of homeowner driveways and subcontract resurfacing will have some invoices paid in full and others paid net of 20%. Our CIS subcontractor guide explains registration, verification and statements in full.
The 20% deducted from your labour takes no account of your GBP 12,570 personal allowance or your van, sealant, equipment and insurance costs. So the tax HMRC has already taken is almost always more than the tax actually due on your real profit. When you file Self Assessment, that overpayment comes back as a refund. Keep every monthly CIS deduction statement, because without them you cannot prove the tax already paid. Use the CIS tax calculator to estimate your refund before you file.
An expense is allowable when incurred wholly and exclusively for the business. Unlike a desk-based trade, a sealer's list is dominated by materials, vehicle and equipment costs.
| Expense | What qualifies | Notes |
|---|---|---|
| Sealant and materials | Block-paving sealant, kiln-dried jointing sand, primer, weed killer, cleaning detergents | Fully deductible; itemise separately from labour on CIS jobs |
| Tools and equipment | Pressure washer, rollers, watering-can applicators, brushes, trays, blowers, mixers | Usually claimed in full via the Annual Investment Allowance |
| Van and vehicle | Mileage at HMRC rates, or actual running costs (fuel, insurance, repairs, road tax) | Pick one method per vehicle and stay consistent |
| PPE and protective clothing | Knee pads, gloves, goggles, respirator masks, kneeling mats, branded workwear | Protective and branded kit only, not everyday clothing |
| Insurance | Public liability, tools and equipment cover, van insurance | Essential and fully deductible |
| Waste and disposal | Tip fees, skip hire, disposal of washed-off silt and old sealant | Keep tip receipts |
| Phone and admin | Business proportion of mobile, quoting software, fuel for site visits | Exclude the private share |
| Home-office costs | HMRC flat-rate working-from-home allowance, or a fair share of household running costs for quoting and paperwork | Most sealers use the simple flat rate |
| Advertising | Van signage, leaflets, local listings, website, social ads | Fully deductible running costs |
| Accountancy and bank fees | Bookkeeping, Self Assessment, business banking | Fully deductible |
The van is usually a sealer's second-biggest cost after materials, because you are hauling a pressure washer, drums of sealant and sand bags to every job. You can claim either simplified mileage at HMRC's flat rate (45p per mile for the first 10,000 business miles, then 25p), which needs only a mileage log, or actual costs, a fair business proportion of fuel, insurance, servicing, repairs and road tax. For a sealer covering serious miles in a thirsty van loaded with kit, the actual-cost method often wins, but you must keep fuel and repair receipts. Choose one method per vehicle and stick with it for as long as you own it. Commuting from home to a regular base is not deductible, but travel between job sites is.
A pressure washer, surface cleaner, blower or a new applicator roller is a capital purchase, but the Annual Investment Allowance normally lets you deduct the full cost in the year you buy it rather than spreading it. That can sharply cut the profit, and the tax, in a year you re-equip. Keep the invoices.
The private share of dual-use costs (your mobile, the van when used for personal trips) must be excluded. Everyday clothing is never allowable, even sturdy boots or trousers you also wear off-site, though genuine PPE and branded workwear are fine. Fixed penalty fines, your own meals on a normal working day, and the personal element of anything dual-use all stay out.
Take a sealer with a busy season of homeowner driveways plus some subcontract resurfacing, billing GBP 46,000 of income for the year.
Income: GBP 46,000 (homeowner jobs GBP 30,000 paid in full; subcontract labour GBP 12,000 paid net of 20% CIS; materials recharged GBP 4,000)
CIS already deducted: 20% of the GBP 12,000 labour = GBP 2,400 paid to HMRC on account
Allowable expenses:
Taxable profit: GBP 46,000 minus GBP 17,400 = GBP 28,600
Income Tax: GBP 28,600 minus GBP 12,570 = GBP 16,030 at 20% = GBP 3,206
Class 4 NIC: GBP 16,030 at 6% = GBP 962
Tax and NIC due: GBP 4,168. But HMRC already holds GBP 2,400 through CIS, so the balance to pay is only about GBP 1,768 (before Class 2 and any payments on account). Run your own figures through the sole trader tax calculator to check.
For a driveway sealer the deductions are real and chunky: the van, the sealant, the kit. Log every drum of sealant and every business mile as you go, and the CIS you have already paid often comes back as a refund.
You must register for VAT once taxable turnover passes GBP 90,000 in any rolling 12-month period. A sole sealer doing mainly residential driveways may stay below it, but materials-heavy resurfacing and commercial car-park or estate contracts push turnover up quickly, so track your rolling 12-month total every month rather than waiting for the year end.
Registration has a catch for this trade. If you mostly invoice homeowners, who cannot reclaim VAT, adding 20% either raises your prices or eats your margin. If you subcontract to VAT-registered builders, the domestic reverse charge for construction services may apply, meaning you do not charge them VAT; instead the contractor accounts for it. That changes your invoices and your cash flow, so get it right if your subcontract work grows.
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:
Because the test is on turnover, a materials-heavy sealer can be caught even on a thin margin: GBP 55,000 of invoices counts even if most of it is sealant and sand. The upside is that capturing each job, material purchase and CIS statement digitally as it happens turns the seasonal scramble into a steady habit, and your quarterly numbers, plus your CIS deductions, are ready when you need them. Our guide to MTD for sole traders walks through the quarterly rhythm.
Not registering for CIS. Working as a subcontractor without registering means a 30% deduction instead of 20%, so HMRC sits on more of your money all year. Register first.
Failing to split labour and materials on CIS invoices. The CIS deduction only applies to labour. If you do not itemise the sealant and sand, the contractor may deduct 20% from the whole invoice, costing you cash flow.
Losing CIS deduction statements. Without them you cannot prove tax already paid, and you may miss the refund you are owed.
Claiming everyday clothing or mixing in private van use. Only genuine PPE and branded workwear count, and the private share of the van must come out of the claim.
Forgetting seasonal cash flow and payments on account. A busy summer can trigger payments on account due in January and July. Set tax aside through the season rather than spending the gross.
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