Dryliner
Tax & MTD Guide

For a self-employed dryliner, tax is shaped almost entirely by one thing: the Construction Industry Scheme. You turn up to a new-build, screw plasterboard to stud, tape and joint the walls, and at the end of the job the main contractor pays you less than you invoiced, because HMRC requires them to hold back 20% of your labour. That is not a deduction you control and it is not your final tax, but it dominates your cash flow all year and it is the reason most dryliners finish the tax year owed money back.

This guide is built around how drylining actually works: CIS deductions and the refund they usually produce, the specific tools, materials, PPE and van costs that drive your profit down to a fair figure, the VAT reverse charge that catches many in the trade, and the record-keeping that turns a stack of payment statements into a clean return.

How Tax Works for a Self-Employed Dryliner

As a sole trader you pay Income Tax on profit, which is your total income (your CIS labour plus any materials you invoice and any direct work) 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.

The twist for a dryliner is that tax has already been taken at source under CIS. When you file, your real bill is worked out on profit, and the CIS deductions already paid are credited against it. Because those deductions ignored your tools, van and personal allowance, the credit normally exceeds the bill and HMRC repays the difference.

Scottish dryliners pay Scottish Income Tax on profit 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 dryliners have a C-coded tax code at rates currently matching the rest of the UK. If a part-time PAYE job or an old employment is distorting your code, run it through the tax code checker.

CIS: The Heart of a Dryliner's Tax

Drylining is a construction operation, so payments from contractors fall squarely within CIS. The first thing to get right is registration. Register as a subcontractor and verified contractors deduct 20% from your labour; fail to register and they must deduct 30%. The 10-point difference is pure cash flow, so registering should be your first move.

A few practical points that catch dryliners out. Deductions only apply to labour, so if you separately and clearly invoice materials, plasterboard, screws, jointing compound, those amounts should not be deducted. Make sure your invoices split labour from materials so the contractor deducts only on the right figure. Every month the contractor must give you a CIS payment and deduction statement; keep all of them, because the total tells HMRC how much you have already paid. Our full walkthrough of CIS for subcontractors covers verification, statements and gross-payment status in detail.

Why Dryliners Usually Get a Refund

This is the part worth understanding. CIS takes 20% off your gross labour with no regard for your costs or your personal allowance. But your actual tax is calculated on profit after expenses, with the first GBP 12,570 tax-free. The gap between those two figures is your refund.

A dryliner buying screwguns, board lifters, stilts, consumables and running a van has real expenses that CIS ignores at the point of deduction. Add the personal allowance on top and the tax already collected almost always overshoots. The CIS tax calculator lets you put in your gross labour, materials and deductions and see the likely repayment before you file.

Allowable Expenses for Dryliners

An expense is allowable when incurred wholly and exclusively for the business. For a dryliner the list is dominated by tools, consumables, PPE and getting yourself and your boards to site.

Tools and the Annual Investment Allowance

Drylining is tool-heavy, and a decent screwgun, a board lift or a set of stilts is a capital purchase. The Annual Investment Allowance lets you deduct the full cost of qualifying equipment in the year you buy it rather than spreading it. For most dryliners that means your big tool and lifting-gear purchases come straight off your profit in the same year, which is exactly what produces a healthy CIS refund. Keep the receipts and log the date of purchase.

Van Costs: Mileage or Actual

You either claim HMRC's simplified mileage rate (currently 45p per mile for the first 10,000 business miles, then 25p) or a fair business proportion of actual running costs, fuel, insurance, tax, servicing and repairs. A dryliner running a heavily loaded van between sites often does better on actual costs, but mileage needs no fuel receipts and far less admin. Work it out both ways once and stick with the winner. Travel between your home and a series of different sites is generally business travel; a daily commute to one fixed workplace is not.

What You Cannot Claim

The private share of dual-use costs, your van fuel for the weekly shop, your personal phone use, must be excluded. Everyday clothing is never allowable even if you only wear it on site; only genuine PPE and protective or branded workwear qualifies. Tea, lunch and ordinary subsistence on a normal working day are not deductible. And meals or fuel for travel to a single, regular workplace fall on the wrong side of the commuting line.

Worked Example: A Dryliner on GBP 45,000 of Labour

Take a CIS-registered dryliner who invoices GBP 45,000 of labour across the year, separately recharges GBP 5,000 of materials, and has had 20% deducted from labour.

Income: GBP 50,000 (labour GBP 45,000 + materials GBP 5,000)

CIS deducted at source: 20% of GBP 45,000 labour = GBP 9,000 already paid

Allowable expenses:

• Materials and consumables (recharged): GBP 5,000
• Power tools and a board lift (AIA, claimed in full): GBP 3,500
• PPE, workwear and boots: GBP 600
• Van running costs: GBP 4,200
• Insurance, CITB levy and CSCS: GBP 900
• Accountancy: GBP 450
• Total expenses: GBP 14,650

Taxable profit: GBP 50,000 minus GBP 14,650 = GBP 35,350

Income Tax: GBP 35,350 minus GBP 12,570 = GBP 22,780 at 20% = GBP 4,556

Class 4 NIC: GBP 22,780 at 6% = GBP 1,367

Total tax and NIC: GBP 5,923. Against that, GBP 9,000 has already been deducted under CIS, so this dryliner is owed a refund of roughly GBP 3,077. Run your own labour, materials and deduction figures through the CIS tax calculator or the sole trader tax calculator to estimate yours before you file.

VAT and the Reverse Charge

You must register for VAT once taxable turnover exceeds GBP 90,000 in any rolling 12-month period. A busy dryliner supplying both labour and materials can pass that line, so watch your rolling total rather than the tax year. Once registered, the domestic reverse charge for construction services usually applies to your work for other VAT-registered contractors: you do not add VAT to those invoices, the contractor accounts for it, but you still reclaim VAT on your own purchases such as tools, materials and van fuel. That combination frequently leaves reverse-charge subcontractors claiming VAT back rather than paying it over. Your invoices must state that the reverse charge applies and show the VAT rate even though no VAT is added to the total.

MTD for Income Tax: What Changes for Dryliners

Making Tax Digital for Income Tax Self Assessment replaces the single annual return with quarterly digital submissions and a year-end finalisation. The thresholds are based on gross income, not profit, and your gross figure includes CIS labour before any deductions:

• April 2026: Combined trading and property income over GBP 50,000
• April 2027: Over GBP 30,000
• April 2028: Over GBP 20,000

Plenty of full-time dryliners clear GBP 50,000 of gross turnover, so April 2026 will be the start date for many in the trade. In practice it means recording each job, material purchase and CIS statement digitally as it happens and sending HMRC a quarterly summary, rather than gathering a year of crumpled statements every January. Done right, the quarterly rhythm actually makes the CIS refund easier to track. Our guide to MTD for sole traders walks through what the quarterly cycle looks like on the tools.

Common Mistakes Dryliners Make

Not registering for CIS. Stay unregistered and contractors must deduct 30% instead of 20%, tying up even more of your cash until you file.

Letting deductions hit materials. CIS should only be deducted on labour. Split labour and materials clearly on every invoice so the contractor deducts on the right figure.

Losing payment and deduction statements. These prove how much tax you have already paid. Without them your refund claim does not match HMRC's records and gets queried.

Forgetting the AIA on big tools. A board lift, a top-end screwgun or a van fit-out can be claimed in full in the year of purchase, which directly boosts your refund.

Ignoring the VAT reverse charge. If you are VAT-registered and add VAT to a contractor's invoice when the reverse charge applies, the invoice is wrong and the contractor may refuse to pay it.

People also ask

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