Shopfitter
Tax & MTD Guide

For a self-employed shopfitter the tax picture is shaped by one thing more than any other: the Construction Industry Scheme. You fit out retail units, install bespoke joinery, shelving, counters and display units, hang doors and fix shopfronts, often working as a subcontractor for a main contractor on a fast-turnaround high-street job. That contractor is required to deduct 20% from your labour and hand it to HMRC before you ever see the money. Understand how that deduction flows through to your return and you turn what feels like a cash-flow hit into a predictable annual refund.

This guide is built around how shopfitters actually earn and spend: CIS deductions and the refund they usually trigger, the heavy tool and van costs that dominate your expenses, the VAT domestic reverse charge that catches out registered tradespeople, and the record-keeping that holds it all together. Get the receipts captured as you go and the return becomes a formality.

How Tax Works for a Self-Employed Shopfitter

As a sole trader you pay Income Tax on profit, which is your invoiced labour and materials minus allowable expenses, not on the cash that lands in your account after CIS. 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 shopfitters 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 shopfitters have a C-coded tax code at rates currently matching the rest of the UK. If you also have a PAYE job, or HMRC has guessed at your CIS position, your code can easily be wrong, so run it through the tax code checker.

CIS: Why You Are Usually Owed a Refund

The Construction Industry Scheme is the single biggest feature of a shopfitter's tax life, and it works in your favour at filing time even though it hurts cash flow during the year. When you subcontract to a contractor, they verify your status with HMRC and then deduct tax from the labour element of your invoice before paying you.

The reason a refund is the norm is simple. The 20% is taken off your full labour figure with no credit for your GBP 12,570 personal allowance and no deduction for your tools, van, fuel, insurance or materials. By the time you work out your real profit and apply the personal allowance, your actual tax and NIC bill is almost always lower than the CIS already paid. The difference comes back to you. Two practical points: always invoice materials separately so CIS is not deducted from them, and keep every CIS deduction statement the contractor gives you, because those statements are the evidence HMRC matches your refund against.

Work out roughly what you are owed with the CIS tax calculator, and for a deeper walk-through of registration, gross payment status and reclaiming deductions see our guide to the CIS subcontractor rules.

If you grow and start paying your own labourers, you also become a contractor under CIS. You then have to verify them with HMRC, deduct 20% or 30% from their labour and submit monthly CIS returns, so register on both sides before you take anyone on.

Allowable Expenses for Shopfitters

An expense is allowable when incurred wholly and exclusively for the business. Shop fitting is tool, vehicle and material heavy, so your deductions are typically much larger than an office-based trade and almost always beat the GBP 1,000 trading allowance.

Tools, the Van and Mileage in Detail

Tools are where shopfitters spend most. Smaller hand tools and consumables are everyday running costs; bigger purchases like a track saw, table saw or a set of cordless power tools are usually claimed in full in the year of purchase through the Annual Investment Allowance. Keep the receipts and a simple tool inventory, because tool spend is high and HMRC expects it to be documented.

The van is your second big cost. You choose one of two methods per vehicle. Either claim the actual running costs (finance or capital allowances, fuel, insurance, road tax, servicing and repairs) reduced for any private use, or use HMRC's simplified mileage rate of 45p per business mile for the first 10,000 miles and 25p after that, which needs only a mileage log. A shopfitter covering high motorway miles between sites and the merchants often does better on actual costs; one with a cheap older van and modest mileage may do better on the flat rate. Work it out once and use the winner.

What You Cannot Claim

The private share of your van, fuel and phone must be excluded; only the business proportion is allowable. Everyday clothing is never allowable even though shop fitting is dirty work, so a normal jumper or jeans does not qualify even if you only wear it on site. Travel from home to a single regular site can count as ordinary commuting and is not deductible, whereas travel between varied job sites and to merchants is. Fixed penalty fines and parking tickets are never allowable.

Record-Keeping for Shopfitters

Good records are what turn the CIS refund from a hope into a calculation HMRC can sign off. Keep, ideally photographed or scanned the day they arrive: every contractor invoice and the matching CIS deduction statement, every materials and tools receipt, your van and fuel costs, a mileage log of business trips, and your insurance and accountancy paperwork. Separate labour from materials on every invoice you raise so the contractor only deducts CIS from labour. A free MTD-ready tool that captures income and receipts as you go means the quarterly figures are already done when MTD bites.

VAT and the Domestic Reverse Charge

You must register for VAT once taxable turnover exceeds GBP 90,000 in any rolling 12-month period. A busy shopfitter supplying both labour and materials can reach this faster than they expect, so watch the rolling figure rather than the tax year.

Once registered, the construction industry domestic reverse charge usually applies when you work for another VAT-registered, CIS-registered contractor. You do not charge VAT on that invoice; the contractor accounts for it instead. You note "reverse charge" on the invoice, charge no VAT, but still reclaim VAT on your own tools, van and materials, which often puts you in a repayment position with HMRC. The reverse charge does not apply when you work directly for an end client such as the shop owner, where you charge VAT in the normal way. Getting the reverse charge wrong is one of the most common VAT errors in construction, so flag any invoice to a contractor for the reverse-charge treatment.

Worked Example: A CIS Shopfitter on GBP 45,000 Labour

Take a self-employed shopfitter working mainly as a CIS subcontractor, invoicing GBP 45,000 of labour plus GBP 8,000 of materials over the year, with 20% deducted from the labour at source.

Income: GBP 53,000 turnover (labour GBP 45,000, materials GBP 8,000)

CIS deducted at source: GBP 45,000 x 20% = GBP 9,000 already paid to HMRC

Allowable expenses:

• Materials supplied (invoiced on): GBP 8,000
• Power tools and consumables (AIA): GBP 3,500
• Van running costs and business mileage: GBP 4,200
• PPE, overalls and tool insurance: GBP 700
• Public liability insurance: GBP 400
• Site parking, phone and accountancy: GBP 900
• Total expenses: GBP 17,700

Taxable profit: GBP 53,000 minus GBP 17,700 = GBP 35,300

Income Tax: GBP 35,300 minus GBP 12,570 = GBP 22,730 at 20% = GBP 4,546

Class 4 NIC: GBP 22,730 at 6% = GBP 1,364

Total tax and NIC due: GBP 5,910. Set against the GBP 9,000 of CIS already deducted, HMRC owes this shopfitter a refund of roughly GBP 3,090. Run your own figures through the sole trader tax calculator or the CIS calculator to estimate your position before you file.

MTD for Income Tax: What Changes for Shopfitters

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 turnover, not profit, and importantly the figure is your income before CIS deductions:

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

Because CIS deductions reduce the cash you receive but not your gross turnover, a shopfitter can easily be over a threshold on invoiced income even while a chunk is held back at source, so test the figure on what you billed, not what you banked. Instead of pulling a shoebox of CIS statements and tools receipts together each January, you record income and costs digitally as you go and send HMRC a quarterly summary. Our guide to MTD for sole traders walks through what the quarterly rhythm looks like in practice.

Common Mistakes Shopfitters Make

Not registering for CIS. Stay unregistered and contractors deduct 30% instead of 20%, needlessly tightening your cash flow until your refund lands.

Letting CIS be deducted from materials. Always invoice materials separately so the 20% only comes off labour, not the timber, fixings and fittings you supplied.

Losing CIS deduction statements. Those statements are the evidence for your refund; without them HMRC cannot match the deductions and your reclaim stalls.

Mishandling the VAT reverse charge. Charging VAT to a CIS-registered contractor when the reverse charge applies, or missing it, is a frequent and costly construction VAT error.

Claiming the private share of the van or fuel. Only the business proportion is allowable, so keep a mileage log and apportion honestly rather than claiming the lot.

People also ask

Do shopfitters get a tax refund through CIS?

What can a self-employed shopfitter claim as expenses?

Do shopfitters need to register for CIS?

When does Making Tax Digital apply to shopfitters?