Allowable expenses, van and soft-wash chemical costs, CIS, NIC, VAT and MTD explained for UK self-employed render and exterior cleaners.
Cleaning render is a deceptively technical trade with a very specific tax footprint. You are out in a van most days, burning fuel between jobs, getting through drums of softwash biocide, replacing worn sprayers and lances, and buying PPE that wears out fast. Unlike an office-based freelancer, almost all of your costs are real, physical and deductible, which means good record-keeping is the difference between a fair tax bill and an inflated one.
The other thing that shapes your tax is who hires you. A render cleaner who works straight for homeowners is taxed like any other sole trader. A render cleaner who turns up as part of a builder's project, cleaning new-build K-rend or prepping a wall before recoating, can be pulled into the Construction Industry Scheme, which changes how and when your tax is collected. This guide covers both, plus the expenses, NIC, VAT and MTD timing that apply to this exact trade.
As a sole trader you pay Income Tax on profit, meaning your total cleaning income 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 personal 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, with Class 2 NIC settled through Self Assessment.
Scottish cleaners 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 cleaners have a C-coded tax code at rates currently matching the rest of the UK. If you also have a part-time PAYE job, perhaps labouring or driving in the winter, that can distort your code, so run it through the tax code checker if the numbers look off.
This is the single most important question for a render cleaner, because it changes how your tax is collected. The Construction Industry Scheme covers most building work, and exterior cleaning, render preparation and surface treatment carried out as part of a construction operation can fall inside it.
If a homeowner books you to clean the algae off their house, CIS does not apply. You invoice them in full and settle your own tax. But if a builder, render contractor or main contractor engages you, for example to softwash a wall before recoating or to clean a finished new-build before handover, they are treated as the contractor and you as the subcontractor. They must deduct 20% from your labour before paying you if you are CIS-registered, or 30% if you are not. That deduction is sent to HMRC against your tax bill.
Because CIS deductions are taken from your gross labour with no account of your expenses, a render cleaner working under CIS has usually overpaid by the end of the year. Once you deduct your van, fuel, chemicals and equipment, your real tax is far lower than the 20% already taken, so you typically claim a Self Assessment refund. Register for CIS to get the 20% rate rather than 30%, keep every deduction statement, and read our full guide to the CIS subcontractor rules. You can estimate your position with the CIS tax calculator.
| Who hires you | CIS applies? | What happens |
|---|---|---|
| Homeowner, direct | No | You invoice in full and pay your own tax |
| Letting agent or landlord (non-construction) | No | Normal sole-trader income |
| Builder or main contractor on a project | Usually yes | 20% or 30% deducted from your labour |
| Render firm subcontracting cleaning to you | Usually yes | 20% or 30% deducted, refund likely |
If your gross self-employed cleaning income is GBP 1,000 or less in a tax year, it is covered by the trading allowance, is tax-free, and you do not need to register for Self Assessment. Cross GBP 1,000 and you must register and report the full amount.
For most render cleaners the trading allowance is quickly left behind, because a single drum of biocide, a knapsack sprayer and a tank of diesel already eat into it. Each year you choose either to deduct the flat GBP 1,000 allowance or your actual allowable expenses, whichever leaves the lower profit. Given how equipment-heavy this trade is, claiming actual expenses almost always wins once you are working seriously.
An expense is allowable when incurred wholly and exclusively for the business. For a softwash and render cleaner the list is dominated by chemicals, kit, the van and PPE.
| Expense | What qualifies | Notes |
|---|---|---|
| Softwash chemicals | Biocide, fungicide, surfactants, render cleaner, sodium hypochlorite | Fully deductible consumables; keep supplier invoices |
| Spray equipment | Knapsack and pressure sprayers, pumps, lances, hoses, soft-wash systems | Usually claimed in full via the Annual Investment Allowance |
| Access equipment | Ladders, scaffold towers, pole systems, harness gear, tower hire | Purchases via AIA; hire is a running cost |
| PPE | Respirators, filters, goggles, chemical gloves, overalls, boots | Specialist protective wear is allowable; everyday clothes are not |
| Van and vehicle | Lease or purchase, servicing, MOT, repairs, tyres, road tax | Claim actual costs or simplified mileage, not both |
| Fuel and mileage | Diesel between jobs, or 45p/25p per mile simplified rate | The 45p rate covers fuel and wear; pick one method per vehicle |
| Insurance | Public liability, tools, goods-in-transit, van insurance | Business cover is fully deductible |
| Waste and disposal | Run-off containment, waste-water disposal, COSHH compliance | Allowable where required for the work |
| Training | COSHH, working-at-height, ladder and safe-use-of-chemicals courses | Updating existing skills is allowable |
| Advertising | Website, Google and Facebook ads, leaflets, signwriting on the van | Fully deductible marketing costs |
| Home-office and phone | Flat-rate working-from-home allowance, business share of mobile | Quoting and admin from home counts |
| Accountancy and bank fees | Bookkeeping, Self Assessment, business banking | Fully deductible |
Your vehicle is usually the second-biggest cost after chemicals, so choose your method carefully. You can either claim simplified mileage at 45p per mile for the first 10,000 business miles and 25p after that, which covers fuel, servicing, insurance and depreciation in one figure and needs only a mileage log. Or you can claim the actual proportion of all running costs based on business versus private use, plus capital allowances on the van itself. A render cleaner doing heavy mileage in an older van often does better on simplified mileage; one running a newer, expensive van with high servicing costs may do better on actuals. Decide once per vehicle and keep a log either way.
Softwash biocide, render cleaners and surfactants are consumables, deducted in full in the year you buy them. Sprayers, pumps, lances, ladders and soft-wash systems are usually claimed in full in the year of purchase through the Annual Investment Allowance, so you do not have to spread them over several years. PPE that is genuinely protective, respirators, chemical-resistant gloves, goggles and overalls, is allowable; ordinary trousers, boots or a hoodie you would wear anyway are not, even if you only use them for work.
The private share of dual-use costs, such as personal mileage in the van or the home-life portion of your phone, must be excluded. Parking fines and speeding tickets are never allowable. Everyday clothing is out even if it gets ruined by bleach. And meals while working locally are not deductible; only genuine overnight or unusually-distant travel subsistence qualifies.
Take a softwash operator working mainly for homeowners, turning over GBP 42,000 for the year with a busy spring and summer.
Income: GBP 42,000 (render and softwash jobs, direct to homeowners)
Allowable expenses:
Taxable profit: GBP 42,000 minus GBP 13,900 = GBP 28,100
Income Tax: GBP 28,100 minus GBP 12,570 = GBP 15,530 at 20% = GBP 3,106
Class 4 NIC: GBP 15,530 at 6% = GBP 932
Total tax and NIC: GBP 4,038 for the year. Because this work is direct to homeowners, no CIS is deducted, so the whole bill is paid through Self Assessment. Run your own figures through the sole trader tax calculator to check where you stand. A cleaner doing the same numbers under CIS would already have had 20% taken from labour and would likely be due a refund instead.
For a render cleaner the receipts are everywhere: the biocide invoice, the sprayer order, the diesel, the CIS statement. Capture them as you go and your tax usually falls, not rises.
You must register for VAT once taxable turnover passes GBP 90,000 in any rolling 12-month period. A solo cleaner rarely reaches this, but a successful softwash business running two vans and a crew can cross it sooner than expected, so track your rolling 12-month total each month rather than waiting for the year end. If most of your work is for homeowners, who cannot reclaim VAT, registering means either adding 20% to your prices or absorbing it from your margin. If you mainly subcontract to VAT-registered builders, registration is less painful because they reclaim the VAT you charge and you reclaim VAT on chemicals, equipment and the van. Note that some construction subcontract work falls under the VAT domestic reverse charge, where the contractor accounts for the VAT instead of you.
Making Tax Digital for Income Tax Self Assessment replaces the annual return with quarterly digital submissions and a year-end finalisation. The thresholds are based on gross income, not profit:
For a render cleaner the gross-income test matters, because under CIS your turnover is measured before the 20% deduction. A cleaner invoicing GBP 55,000 of labour and materials is over the GBP 50,000 line even if CIS deductions and expenses leave a much smaller profit. Instead of bagging up a shoebox of receipts each January, you will record each job, chemical order and fuel receipt digitally and send HMRC a summary every quarter. Our guide to MTD for sole traders walks through the quarterly rhythm.
Not registering for CIS. If you ever subcontract to builders and have not registered, contractors must deduct 30% instead of 20%, tying up more of your cash until you reclaim it.
Treating CIS deductions as lost tax. The 20% taken is an advance payment, not a final charge. Count your expenses and you usually get a chunk back as a refund.
Mixing private and business van use. Only the business proportion of mileage or running costs is allowable; keep a log to back it up.
Forgetting consumables add up. Biocide, filters and small kit feel minor job-to-job but total thousands a year, and every penny is deductible if you keep the invoices.
Claiming everyday clothing. Trousers and boots ruined by bleach are still ordinary clothing in HMRC's eyes; only genuine PPE is allowable.
Tax guide for Vinted sellers in the UK: trading vs selling personal items, the GBP 1,000 trading allowance, allowable expenses, the platform data HMRC now receives, VAT and MTD.
UK Airbnb tax guide: the GBP 7,500 Rent a Room scheme, the GBP 1,000 property allowance, the abolition of furnished holiday lettings, allowable expenses, VAT and MTD for landlords.
The complete UK tax guide for Uber drivers: gross fares, mileage claims, Uber service fees, VAT, and what MTD for Income Tax means for you.
UK eBay seller tax guide: selling personal items vs trading, the GBP 1,000 trading allowance, eBay fees, the platform reporting rules, VAT and MTD.
Tax guide for self-employed hairdressers: chair rent, allowable expenses, mileage, VAT and MTD for Income Tax explained in plain English.
Everything self-employed taxi and private-hire drivers need to know about tax, mileage vs actual costs, VAT, and Making Tax Digital in 2025/26.
TapTax connects to your bank, categorises expenses automatically, and submits quarterly updates to HMRC. Free plan, no card required.
