Tax Guide for Self-Employed Carpenters
What expenses can a self-employed carpenter claim? CIS deductions, power tools, van costs, timber and PPE — with a worked tax calculation example.
Tax Essentials
- CIS Status
- Yes — 20% deduction
- Typical Income
- £30,000–£45,000
- HMRC Flat Rate
- £60/year (tools & clothing)
- VAT Threshold Risk
- Low risk
- Industry Body
- Institute of Carpenters
- Key Certifications
- CSCS card (Blue Skilled Worker or Gold Advanced Craft) · NVQ Level 2/3 in Carpentry & Joinery
Carpentry and joinery is construction work that falls under the Construction Industry Scheme (CIS). If you work as a subcontractor on site, your contractor deducts 20% from your payments and sends it to HMRC. At the end of the tax year, you file Self Assessment — and the expenses you claim often mean a significant refund.
Carpenters tend to spend heavily on power tools, timber for bespoke work, and van running costs. Every receipt matters, especially in the first few years when you're building up your kit.
What You Can Claim
| Expense | Examples | Typical Annual Cost |
|---|---|---|
| Tools & equipment | Cordless drill (Makita DHP486), circular saw (DeWalt DCS570), mitre saw, router, chisels | £500–£1,500 |
| PPE & workwear | Safety boots, knee pads, hi-vis, safety glasses, ear defenders | £200–£400 |
| Vehicle costs | Van fuel, insurance, MOT, servicing, road tax | £4,000–£6,000 |
| Materials & consumables | Timber offcuts, screws, nails, adhesives, sandpaper, saw blades (not supplied by client) | £500–£2,000 |
| Insurance | Public liability, tool cover | £150–£400 |
| Training & certifications | CSCS card renewal, NVQ assessment fees, first aid course | £100–£500 |
| Phone & apps | Mobile contract (business portion), job management apps | £150–£300 |
| Professional memberships | Institute of Carpenters, Federation of Master Builders | £50–£200 |
| Accounting fees | Tax return preparation, bookkeeping | £150–£400 |
Vehicle Costs
Most carpenters drive a van loaded with tools and materials — typically 80–90% business use. You can claim either the simplified mileage rate (45p per mile for the first 10,000, then 25p — rising to 55p per mile for the first 10,000 from 6 April 2026) or actual costs (fuel, insurance, MOT, repairs). At 12,000 business miles under the 2025/26 rates, the mileage method gives you £5,000. Once you pick a method for a vehicle, you generally stick with it.
Certifications That Count
- CSCS card — effectively required for site access. Blue Skilled Worker card needs NVQ Level 2 plus the CITB HS&E test (~£58 combined, valid 5 years)
- NVQ Level 2/3 in Carpentry & Joinery — if you're assessed on-site to upgrade your card, the assessment fee is deductible (~£850–£2,500)
- First Aid at Work — deductible if required for site access (~£100–£200)
- Working at Heights — deductible if needed for your projects (~£100–£200)
- Institute of Carpenters membership — deductible as a professional subscription
HMRC Flat Rate Alternative
HMRC allows a £60/year flat rate deduction for tools and specialist clothing instead of claiming actual costs. For most carpenters, actual tool costs alone run into hundreds. Claim the real figures with receipts.
Expenses You Can't Claim
- Commuting to a regular site — if you work at the same site for over 24 months, travel there isn't deductible. Travel between different sites and jobs is fine
- Everyday clothing — jeans and trainers don't qualify even if you only wear them for work. Only specialist PPE counts (steel-toe boots, knee pads, hi-vis)
- Your original carpentry qualification — your initial NVQ or City & Guilds to become a carpenter isn't deductible. Only renewals, upgrades, and CPD courses count
- Fines and penalties — parking tickets, PCNs, late filing penalties
- Food and drink — unless you're working away from your normal area overnight
Example: How Much Tax Does a Carpenter Pay?
Sarah works as a self-employed carpenter through CIS. Here's her 2025/26 tax year:
| Item | Amount |
|---|---|
| CIS income (gross) | £38,000 |
| CIS deducted (20%) | £7,600 |
| Allowable expenses | £7,000 |
| Taxable profit | £31,000 |
| Income Tax (after £12,570 personal allowance) | £3,686 |
| Class 2 NI (profits above £6,845 SPT — none due, NI credit applied) | £0 |
| Class 4 NI (6% on profits between £12,570 and £50,270) | £1,106 |
| Total tax + NI due | £4,792 |
| CIS already deducted | £7,600 |
| Refund due | £2,808 |
Sarah's profit is above the Small Profits Threshold (£6,845 for 2025/26), so she doesn't pay Class 2 NI but still gets the NI credit toward her State Pension. Without claiming expenses, her total tax + NI would be £6,612 and her refund would shrink to just £988. Expenses save Sarah £1,820 — the difference between a modest refund and a substantial one. You can claim back your CIS deductions through your Self Assessment return, and the CIS refund timeline explains when to expect the money.
Record Keeping Tips
- Photograph receipts from tool suppliers — Screwfix, Toolstation, and timber merchants use thermal paper that fades within months. Snap every receipt on your phone the same day
- Log site visits and mileage daily — note the site address and miles driven. A mileage tracker app saves time, but a notebook works if you're consistent
- Save your CIS payment statements — you need these to reclaim the 20% deduction. Chase your contractor for any missing ones well before January
- Track tool purchases separately — keep a running list of power tools and their costs. If HMRC queries your claim, a detailed tool inventory is convincing
- Keep van expense records together — fuel, MOT certificates, service invoices, insurance renewals. Store digitally in one folder by tax year
Key Deadlines
| Deadline | What |
|---|---|
| 5 April | Tax year ends — finalise your income and expense records |
| 31 January | File Self Assessment and pay any tax owed (or receive your refund) |
| 31 July | Second payment on account (if applicable) |
If this is your first year filing, you need to register for Self Assessment by 5 October after the tax year ends.
Frequently Asked Questions
How much tax does a self-employed carpenter pay?
A carpenter earning £38,000 gross with £7,000 in allowable expenses pays around £3,686 in Income Tax plus £1,106 in Class 4 NI for the 2025/26 tax year. No Class 2 NI is due once profits exceed the £6,845 Small Profits Threshold, though you still get the NI credit. If your contractor has already deducted £7,600 under CIS, you'd be due a refund of about £2,808 once you file Self Assessment.
Can I claim my CSCS card and Institute of Carpenters membership as expenses?
Yes. CSCS card renewal fees (around £58 for the Blue Skilled Worker card every 5 years) are deductible as they're effectively required for site access. Institute of Carpenters membership (around £50–£200 per year) qualifies as an allowable professional subscription. Your original NVQ Level 2/3 qualification isn't deductible, but renewals and upgrades are.
Can I claim my carpenter's van and power tools?
Yes. Power tools like DeWalt circular saws, Makita drills and Festool routers are fully deductible when used for work — claim the actual cost, or use capital allowances for higher-value kit. For your van, claim either 45p per mile (first 10,000 business miles, then 25p — rising to 55p from 6 April 2026) or actual costs apportioned for the business percentage, typically 80–90% for working carpenters.
Do carpenters need to charge VAT?
Only if your annual turnover exceeds £90,000 (the 2025/26 VAT registration threshold). Most self-employed carpenters working through CIS sit well below this, but you can approach it quickly if you take on bespoke joinery contracts. Once registered, the CIS reverse charge usually means you don't add VAT on labour invoices to other VAT-registered contractors.
How do I claim back CIS deductions as a carpenter?
You reclaim them through your Self Assessment return. Add up your gross CIS income and the 20% your contractors deducted (using your monthly CIS payment statements), then HMRC offsets that against your Income Tax and Class 4 NI bill. Anything left over is refunded — typically within a few weeks of filing if your bank details are on record.
This guide is for informational purposes only and does not constitute tax, legal, or financial advice. Tax rules change frequently. Always verify current requirements on GOV.UK or consult a qualified accountant for your specific situation.
Official Sources
- Expenses if you're self-employed — GOV.UK
- Construction Industry Scheme — GOV.UK
- Simplified expenses for vehicles — GOV.UK
- Self-employed National Insurance rates — GOV.UK