Carpet Fitter
Tax & MTD Guide
CIS deductions and refunds, van and tool costs, mileage, PPE, VAT and MTD for Income Tax explained for UK self-employed carpet and flooring fitters.
Estimate your tax as a self-employed carpet fitter
Adjust the figures to see your estimated Income Tax and Class 4 National Insurance for the year.
Total turnover before expenses
Under £1,000 we use the trading allowance automatically
Estimated tax bill
£3,752
10.4% effective rate for 2026/27
- Income tax
- £2,886
- Class 4 NI
- £866
Take-home pay
£23,248
after tax, NI and expenses
This is an estimate using HMRC-confirmed rates for 2026/27, not your official tax calculation. TapTax is MTD-compatible, so you can connect to HMRC and file the real figures in a couple of taps.
- Carpet fitting is a tools-and-van trade: your biggest deductions are the van or mileage, hand and power tools, and consumables like gripper rods, underlay and adhesive, not desk costs.
- If you fit as a subcontractor for builders or shopfitters you are usually inside CIS, so 20% is deducted from your labour at source and you typically reclaim it as a Self Assessment refund.
- Direct retail jobs booked by a homeowner usually sit outside CIS, so many fitters carry a mix of CIS and non-CIS income that must be recorded separately.
- Profit is income minus allowable expenses; for 2026/27 you pay 20% above £12,570, plus Class 4 NIC at 6% then 2%, with Class 2 settled through Self Assessment.
- MTD for Income Tax starts April 2026 above £50,000, April 2027 above £30,000 and April 2028 above £20,000, tested on gross income before CIS and expenses.
The tax picture for a carpet fitter is shaped by two things most office-based freelancers never deal with: the Construction Industry Scheme taking a slice of your money before it reaches you, and a steady outflow on a van, tools and consumables that genuinely add up. Get both right and you are usually owed money rather than chasing a bill.
A working fitter might spend Monday laying carpet on a new-build for a main contractor, who deducts CIS tax from the labour, then on Saturday do a supply-and-fit lounge for a homeowner who pays the full price in cash or card with no deduction at all. Those two jobs are taxed differently and recorded differently. This guide is built around how flooring fitters actually earn and spend, so the annual return becomes a refund claim rather than a headache.
How Tax Works for a Self-Employed Carpet Fitter
As a sole trader you pay Income Tax on profit, which is your total fitting income minus allowable expenses. For 2026/27 the personal allowance covers the first £12,570, then you pay 20% to £50,270, 40% to £125,140 and 45% above, with the personal allowance tapering away between £100,000 and £125,140. Class 4 National Insurance is 6% on profit between £12,570 and £50,270 and 2% above, with Class 2 NIC settled through Self Assessment.
Scottish fitters pay Scottish Income Tax on their 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 fitters have a C-coded tax code at rates currently matching the rest of the UK. If you have a PAYE job alongside your fitting, or your code looks wrong, run it through the tax code checker so you are not over- or under-taxed at source.
CIS: The Big One for Flooring Fitters
The Construction Industry Scheme is the single most important thing a carpet fitter needs to understand. If you fit flooring as a subcontractor for a builder, shopfitter, developer or main contractor, that contractor must deduct CIS tax from your labour before they pay you and hand it straight to HMRC.
- Registered with HMRC for CIS: the contractor deducts 20% from your labour.
- Not registered: the deduction jumps to 30%, so registering is worth doing on day one.
- Materials are not deducted: CIS only applies to the labour element, so always split labour and materials on your invoice.
Because that 20% comes off the top with no credit for your personal allowance or your van, tools and mileage, it almost always takes more than your real tax bill. At Self Assessment you add up all the CIS tax deducted across the year, set it against your Income Tax and Class 4 NIC, and HMRC refunds the difference. A fitter with ordinary running costs typically gets a meaningful repayment. Our CIS subcontractor guide explains the scheme in full, and the CIS tax calculator estimates your likely refund.
- Construction Industry Scheme (CIS)
- A HMRC scheme under which contractors deduct tax from the labour payments they make to construction subcontractors and pay it directly to HMRC. Carpet and flooring fitters working for builders, shopfitters or developers usually fall within it. Registered subcontractors have 20% deducted from labour, unregistered ones 30%. The deduction is an advance payment towards your Income Tax and Class 4 NIC, reconciled through Self Assessment, where most fitters reclaim an overpayment. Materials you supply are excluded from the deduction.
Not every job is CIS. When a homeowner books you directly to supply and fit their carpet, you are usually selling to a consumer outside the scheme, so they pay you in full with nothing deducted. Many fitters run a mix, and the two streams must be kept apart in your records: CIS income arrives net of 20% with a deduction statement, while retail income arrives gross and you owe the tax on it later. The sole trader tax calculator handles the non-CIS side.
Allowable Expenses for Carpet Fitters
An expense is allowable when incurred wholly and exclusively for the business. For a fitter the list is dominated by the van, tools and consumables, which is exactly why CIS deductions tend to overpay your real liability.
| Expense | What qualifies | Notes |
|---|---|---|
| Van and vehicle costs | Fuel, insurance, road tax, servicing, repairs, finance interest, or simplified mileage | Pick one method and stay consistent for that vehicle |
| Hand and power tools | Knee-kicker, power stretcher, carpet and trimming knives, stair tool, bolster, hammer, seaming iron, knee pads | Usually claimed in full via the Annual Investment Allowance |
| Consumables | Gripper rods, underlay, adhesive, double-sided tape, seaming tape, threshold trims, edge bars, spray | Stock used on jobs is fully deductible |
| PPE and workwear | Knee pads, dust masks, gloves, safety boots, branded uniform | Protective clothing only; everyday clothes are not allowable |
| Tool and van insurance | Cover for tools in the van, goods-in-transit, breakdown cover | Business cover only |
| Public liability insurance | Cover against damage to a client's property | Essential and fully deductible |
| Phone and communications | Business share of mobile and data for bookings and quotes | Exclude the private proportion |
| Home admin and storage | Flat-rate home-working allowance, or a fair share of costs for quoting, invoicing and storing stock | Choose the larger fair deduction |
| Subcontractor labour | A second fitter or labourer you pay on a big job | If they are CIS, you may need to verify and deduct |
| Accountancy and CIS fees | Bookkeeping, Self Assessment, CIS return support | Fully deductible |
Van or Mileage: Pick Your Method
The van is most fitters' second biggest cost after tools. You can either claim a business proportion of all actual running costs (fuel, insurance, tax, servicing, repairs and finance interest), or use HMRC's simplified mileage rate of 45p a mile for the first 10,000 business miles in the year and 25p after that. Once you pick a method for a vehicle you must stick with it for as long as you own it, so do the sum once. High-mileage fitters criss-crossing a region often do better on mileage; those with an expensive van and lower mileage often do better on actual costs.
Tools and the Annual Investment Allowance
A power stretcher, seaming iron or a full kit refresh can be claimed in full in the year you buy it through the Annual Investment Allowance, rather than spread over years. Keep every receipt, including the steady drip of replacement blades, knee pads and small hand tools, because individually they look trivial but across a year they form a serious deduction that directly increases your CIS refund.
What You Cannot Claim
Ordinary clothing is never allowable even if you only wear it for work; only genuine PPE and branded uniform qualify. The private share of your van, phone and home costs must be stripped out. The fuel and time spent travelling from home to a regular fixed workplace can count as commuting rather than business travel, so keep a mileage log that records the job address for each trip.
Worked Example: A CIS Carpet Fitter on £42,000
Take a registered subcontractor whose labour invoices for the year total £42,000, all paid by contractors under CIS with 20% deducted.
Income: £42,000 labour (CIS tax deducted at source: £8,400)
Allowable expenses:
- Van running costs / mileage: £5,200
- Tools and a power stretcher (AIA, in full): £1,800
- Consumables (gripper, underlay, adhesive, trims): £2,400
- PPE, tool and public liability insurance: £900
- Phone and home admin proportion: £600
- Accountancy and CIS support: £500
- Total expenses: £11,400
Taxable profit: £42,000 minus £11,400 = £30,600
Income Tax: £30,600 minus £12,570 = £18,030 at 20% = £3,606
Class 4 NIC: £18,030 at 6% = £1,082
Total Income Tax and NIC due: £4,688. But £8,400 of CIS tax was already deducted, so HMRC refunds £3,712 (before any Class 2 NIC and student loan adjustments). That refund is the whole reason CIS fitters should file promptly. Run your own figures through the CIS tax calculator to estimate yours.
For a CIS carpet fitter the return is usually a refund claim, not a bill. Every tool receipt and every business mile you log puts more of that 20% deduction back in your pocket.
Record-Keeping That Wins Your Refund
Your refund is only as good as your records. Keep every CIS deduction statement from each contractor, as these prove the tax already paid. Split labour and materials on every invoice so the right CIS deduction is applied. Photograph and file receipts for tools, consumables and fuel as you go, and keep a mileage log noting each job address. Separate your CIS jobs from direct retail jobs so the gross retail income is not forgotten. Doing this continuously, rather than in a January panic, is exactly what MTD will soon require anyway.
VAT for Carpet Fitters
You must register for VAT once taxable turnover exceeds £90,000 in any rolling 12-month period. Supply-and-fit fitters who buy the carpet, underlay and grippers and bill the customer for the whole job reach that threshold faster, because the materials count towards turnover, not just your labour. Labour-only subcontractors usually stay well below it.
If you do register and work for VAT-registered contractors, the construction services domestic reverse charge often applies, meaning you do not charge VAT on that labour and the contractor accounts for it instead. This commonly leaves CIS fitters in a regular VAT repayment position because they reclaim VAT on materials and tools while charging none on reverse-charge work. It is worth professional advice before registering, because the reverse charge trips up a lot of trades.
MTD for Income Tax: What Changes for Fitters
Making Tax Digital for Income Tax replaces the once-a-year return with quarterly digital submissions and a year-end finalisation. The thresholds are based on gross income, not profit, and crucially the gross figure is measured before CIS deductions:
- April 2026: Combined trading and property income over £50,000
- April 2027: Over £30,000
- April 2028: Over £20,000
A fitter invoicing £55,000 of labour is in scope from April 2026 even though 20% was deducted at source and their profit is far lower. Instead of bundling a shoebox of deduction statements and fuel receipts together each January, you record income and expenses digitally as jobs happen and send HMRC a summary every quarter. For a trade that already deals with CIS paperwork all year, the continuous habit fits naturally. Our guide to MTD for sole traders walks through the quarterly rhythm.
Common Mistakes Carpet Fitters Make
Not registering for CIS. Staying unregistered means 30% is deducted instead of 20%, tying up more of your cash until you file. Register on day one.
Losing CIS deduction statements. Without them you cannot prove the tax already paid, and you risk being taxed twice on the same income.
Not splitting labour and materials. CIS should only be deducted from labour; lumping materials in lets a contractor over-deduct.
Forgetting non-CIS retail income. Direct homeowner jobs arrive gross with no deduction, so the tax is owed in full at year end and is easy to overlook.
Skipping small tool and consumable receipts. Blades, knee pads, tape and adhesive add up to a large deduction across the year that directly increases your refund.
People also ask
Quarterly expenses under MTD: the £90,000 rule
If your annual business turnover is £90,000 or less, HMRC lets you report a single consolidated expenses total in each Making Tax Digital quarterly update instead of breaking expenses down into itemised categories. Most self-employed carpet fitter businesses are under this threshold, so a quarterly update can be as simple as two figures: total income and total expenses. You still need to keep digital records of each individual expense - the relaxation only changes how much detail goes into the quarterly update itself.
Frequently asked questions
Calculators for carpet fitters
Helpful guides
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