How to Start a Carpentry or Joinery Business in the UK

Carpentry and joinery remain among the most in-demand trades in the UK. Whether you specialise in kitchen fitting, bespoke furniture, site carpentry, or heritage restoration, there is steady work available for skilled carpenters who run a professional operation.

This guide covers the practical steps to get your carpentry or joinery business set up properly.

Qualifications

There is no legal requirement to hold a specific qualification to work as a carpenter in the UK. However, in practice you will need:

• NVQ Level 2 or 3 in carpentry and joinery — the standard industry qualification
• CSCS card — required on most construction sites. You need to pass the CITB Health, Safety and Environment test and hold a relevant NVQ.
• City & Guilds or equivalent — many customers and contractors expect to see formal qualifications

If you plan to work on construction sites as a subcontractor, a valid CSCS card is effectively mandatory.

Sole Trader or Limited Company?

Most carpenters start as sole traders. It is the simplest option — register with HMRC, keep records of your income and expenses, and file a Self Assessment tax return once a year.

If you work primarily as a subcontractor on construction sites, you will be part of the Construction Industry Scheme (CIS). As a sole trader, contractors deduct 20% from your payments (if registered) or 30% (if not). These deductions count towards your tax bill.

A limited company can offer tax advantages if your profits are consistently above £40,000–£50,000. It also provides limited liability, which may be important if you take on larger projects.

Registering with HMRC

Register for Self Assessment within three months of starting your business. You will receive a UTR (Unique Taxpayer Reference) by post.

CIS Registration

If you work as a subcontractor for other businesses in the construction industry, register with CIS. Without registration, contractors must deduct 30% from your payments. With registration, this drops to 20%. If you meet turnover and compliance requirements, you can apply for gross payment status.

Always separate labour and materials on your invoices — CIS deductions only apply to the labour portion.

VAT

Register for VAT when your turnover exceeds £90,000. Be aware of the domestic reverse charge for construction services — if you supply construction services to a VAT-registered customer who is also CIS-registered, you may need to apply the reverse charge instead of charging VAT normally.

Insurance

• Public liability insurance — essential. Most main contractors require a minimum of £1–5 million cover.
• Employers' liability — legally required if you employ anyone
• Professional indemnity — important if you design bespoke pieces or provide advisory services
• Tools insurance — covers your hand and power tools against theft or damage. Particularly important if you carry expensive tools in your van.
• Van insurance — commercial vehicle cover
• Personal accident insurance — provides income if you are unable to work due to injury

A comprehensive policy typically costs £300–£1,000 per year depending on your circumstances.

Claimable Expenses

• Tools and equipment — hand tools, power tools, workbenches, clamps, routers, saws
• Materials — timber, fixings, adhesives, finishes, hardware (for stock, not client-supplied materials)
• Vehicle costs — fuel, insurance, servicing, or mileage at 45p per mile
• Workshop costs — rent, utilities, rates (if you have a separate workshop)
• Home office costs — for admin, quoting, and invoicing
• CIS deductions received — offset against your tax bill
• Insurance premiums
• CSCS card and training costs
• PPE and workwear — safety boots, goggles, ear protection, work clothing
• Phone and communications
• Marketing — website, van livery, business cards
• Subcontractor payments
• Waste disposal
• Accountancy fees

Keep every receipt. Accounted lets you snap photos of receipts on site and matches them to your bank transactions automatically.

Workshop vs Site Work

Your business model affects your expenses and tax position:

Site carpentry (working on construction sites): Lower overheads but CIS applies. Travel to different sites is a deductible expense. You may need multiple CSCS cards and certifications.

Workshop-based joinery (bespoke furniture, kitchens, staircases): Higher overheads (workshop rent, machinery) but more control over pricing and scheduling. CIS usually does not apply if you are supplying finished goods rather than on-site labour.

Many carpenters do a mix of both, which works well for balancing income.

Industry-Specific Tax Considerations

CIS Deductions

CIS deductions are not an additional tax — they are advance payments towards your Income Tax and National Insurance. When you file your Self Assessment, your CIS deductions are subtracted from your tax bill. If your deductions exceed your tax liability, you get a refund.

Keep all CIS payment and deduction statements. You will need them for your tax return.

Capital Allowances

Expensive machinery — table saws, planers, thicknessers, CNC machines — qualifies for capital allowances. The Annual Investment Allowance lets you deduct the full cost in the year of purchase, up to £1 million.

Flat Rate VAT

If VAT-registered, the flat rate for carpentry and joinery work is typically 9.5% (manufacturing) or 14.5% (general building). Which category you fall into depends on the nature of your work. Check with HMRC or your accountant.

Bookkeeping Tips

• Separate business and personal bank accounts — non-negotiable
• Record CIS deductions carefully — keep every statement
• Separate labour and materials on all invoices
• Track tool purchases — they are fully deductible
• Reconcile your bank account weekly
• Set aside 25–30% of profits for tax — even with CIS deductions, you may owe more
• Invoice promptly — construction is notorious for slow payment

Accounted understands CIS and is built for UK tradespeople. It tracks your deductions, categorises your expenses, and keeps everything ready for your tax return.

Key Deadlines

• 19th of each month — CIS return deadline (if you engage subcontractors)
• 31 January — Self Assessment tax return and payment
• 31 July — second payment on account
• Quarterly — VAT returns if registered

Getting Started

Carpentry and joinery offer a reliable path to self-employment. Get registered, get insured, and keep your records clean from day one. The financial side does not have to be complicated.

Ready to keep your carpentry business finances sorted? Sign up for Accounted and let Penny handle the bookkeeping while you focus on the craft.