Roofer Tax UK 2026/27: Tools, Scaffolding Costs and CIS Explained
Self-employed roofers face higher equipment and insurance costs than many trades, plus frequent Construction Industry Scheme (CIS) obligations. Here's a full worked example on a typical £40,000-£55,000 turnover.
Worked Example: £48,000 Turnover, CIS Subcontractor
Self-Employed Tax Calculator
Calculate income tax, Class 2 and Class 4 National Insurance for self-employed and sole traders for 2025/26.
Self-employed tax calculatorGross income (before CIS deduction): £48,000
CIS tax deducted at source (20%, registered subcontractor): £9,600 — held by HMRC against your eventual liability, not an additional cost
Deductible expenses:
| Item | Cost |
|---|---|
| Scaffolding hire (per job) | £3,200 |
| Roofing tools, harness, fall-arrest kit (AIA) | £1,900 |
| Van running costs | £4,100 |
| Public liability + employer's liability insurance | £950 |
| Consumables (felt, nails, sealant) | £2,600 |
| Accountancy | £350 |
| Total expenses | £13,100 |
Taxable profit: £48,000 − £13,100 = £34,900
Income tax: (£34,900 − £12,570) × 20% = £4,466
Class 4 NI: (£34,900 − £12,570) × 6% = £1,340
Total tax and NI due: £5,806, against which the £9,600 already deducted under CIS is credited — resulting in a refund of roughly £3,794 once your Self Assessment return is processed.
CIS: Deduction at Source vs Gross Payment Status
| Status | What happens |
|---|---|
| CIS-registered subcontractor (standard) | Contractor deducts 20% from your labour payments before paying you; you reconcile the actual tax due via Self Assessment, often resulting in a refund |
| Not CIS-registered | Contractor deducts 30% — a real cash-flow disadvantage, register with HMRC as soon as you start subcontracting |
| Gross Payment Status | No deduction at source at all — full payment received, tax settled directly through Self Assessment; requires meeting HMRC turnover and compliance history tests |
Equipment and Insurance Costs to Plan For
- Insurance: public liability and, if you employ or regularly use subcontractors, employer's liability insurance — both typically higher for roofing than lower-risk trades.
- Fall-arrest and safety equipment: harnesses, roof ladders, edge protection — fully deductible via capital allowances and also a legal requirement under working-at-height regulations.
- Scaffolding: hired scaffolding is a direct job cost; owned scaffold towers are capital expenditure.
- Vehicle: a van suited to carrying tiles, felt rolls and ladders safely — purchase via AIA, running costs as normal expenses.
Registering and Filing
Register for both Self Assessment and CIS (if working as a subcontractor or engaging subcontractors) as soon as you start trading. File your Self Assessment return by 31 January following the tax year end, using your CIS deduction statements from contractors to support any refund claim for tax already withheld at source.
Frequently asked questions
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