Tax Guide for Self-Employed Construction Labourers

Construction labouring is work that falls under the Construction Industry Scheme (CIS). If you work as a self-employed labourer, your contractor deducts 20% from every payment and sends it to HMRC. At the end of the tax year, you file Self Assessment — and because labourers have lower expenses than skilled trades, the CIS refund you're owed is often larger than you'd expect.

Here's why: 20% CIS is deducted from your entire income, including the portion covered by your £12,570 personal allowance. Once you file and claim your expenses, the difference comes back as a refund.

Tax Essentials

Item	Labourer Detail
CIS applicable	Yes
CIS deduction rate	20% registered, 30% unregistered
Typical income range	£25,000–£35,000
HMRC flat rate expense	£60/year (tools & specialist clothing)
VAT threshold relevant	No — labourer earnings sit well below £90,000
Required card	CSCS Green Labourer (~£36 + £22.50 HS&E test)
Key deadline	31 January (Self Assessment)

What You Can Claim

Expense	Examples	Typical Annual Cost
Travel between sites	Mileage at 45p/mile (first 10,000), then 25p — or public transport fares	£1,000–£3,000
PPE & workwear	Steel-toe boots (£30–£80), hi-vis vests, hard hat, rigger gloves, ear defenders	£150–£350
Basic hand tools	Tape measure, utility knife, shovel, wheelbarrow (if you supply your own)	£50–£150
Insurance	Public liability (from ~£80/year for £1M cover)	£80–£200
CSCS card	Green Labourer card renewal (£36 + HS&E test £22.50)	£30–£60
Phone	Mobile contract (business portion — agency calls, site contact)	£100–£200
Wet weather gear	Waterproof jacket, over-trousers (replaced as needed)	£30–£60
Accounting fees	Tax return preparation, bookkeeping	£150–£300

Travel: Often Your Biggest Deduction

Labourers move between sites frequently — sometimes weekly, sometimes daily. Travel to temporary work sites is deductible (but commuting to a permanent workplace for over 24 months is not). At 8,000 business miles per year, the mileage deduction alone is £3,600.

PPE: Replaced More Often Than You Think

Steel-toe boots wear out every 6–12 months on a building site. Hi-vis vests get torn, gloves get shredded. A realistic annual PPE spend of £150–£350 is easy to hit — and every item is deductible.

HMRC Flat Rate Alternative

HMRC allows a £60/year flat rate deduction for tools and specialist clothing. For labourers, boots alone cost more than this — claim the real figures with receipts.

Expenses You Can't Claim

• Commuting to a regular site — if you've worked at the same site for over 24 months, travel there isn't deductible. Travel between different temporary sites is
• Everyday clothing — jeans, hoodies, and trainers don't qualify even if you only wear them on site. Only specialist PPE counts (steel-toe boots, hard hat, hi-vis)
• Tools provided by the contractor — if the site provides shovels, wheelbarrows, and equipment, you can't claim for them
• 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 Labourer Pay?

Jack works as a self-employed labourer through CIS. Here's his 2025/26 tax year:

Item	Amount
CIS income (gross)	£30,000
CIS deducted (20%)	£6,000
Allowable expenses	£3,000
Taxable profit	£27,000
Income Tax (after £12,570 personal allowance)	£2,886
Class 2 NI (profits above £6,845 SPT — treated as paid)	£0
Class 4 NI (6% on £12,570–£50,270)	£866
Total tax + NI due	£3,752
CIS already deducted	£6,000
Refund due	£2,248

Even with just £3,000 in expenses, Jack gets a £2,248 refund — because 20% CIS was deducted from his entire income, including the tax-free personal allowance. Without claiming expenses, his refund would still be £1,468 — but expenses add another £780 on top.

Record Keeping Tips

• Log every site and journey — note the site address, contractor name, and mileage each day. Labourers move between sites more than most trades, so a daily log prevents gaps
• Keep PPE receipts — photograph receipts for boots, gloves, hi-vis, and hard hats immediately. They're small purchases that add up over the year
• Save your CIS payment statements — you need these to reclaim the 20% deduction. Every contractor should give you one for each payment — chase missing ones before January
• Record which sites are temporary — HMRC allows travel deductions to temporary workplaces but not permanent ones. Note when you started and finished at each site
• Keep your CSCS card renewal receipt — the £58.50 combined cost (card + HS&E test) is deductible every time you renew

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, register for Self Assessment by 5 October after the tax year ends.

Frequently Asked Questions

How much tax does a self-employed labourer pay?

A labourer earning £30,000 gross with £3,000 in allowable expenses pays around £2,886 in Income Tax plus £866 in Class 4 National Insurance for the 2025/26 tax year. Class 2 NI is £0 once profits exceed the £6,845 Small Profits Threshold. If 20% CIS has been deducted (£6,000), you'd be due a refund of around £2,248.

Do I need a CSCS card to work as a self-employed labourer?

Most main contractors require a CSCS Green Labourer card to work on UK construction sites. The card costs around £36 and requires passing the CITB Health, Safety & Environment test (£22.50). Both the card fee and the test fee are deductible business expenses, as is the cost of any preparatory study materials.

Can I claim travel between building sites as a labourer?

Yes — labourers usually move between several temporary sites, so the travel between home and each site is allowable. You can claim either 45p per mile (first 10,000 business miles, then 25p) for 2025/26 or your actual van costs apportioned for business use. Travel to the same site for more than 24 months becomes ordinary commuting and stops being deductible.

Do labourers need to register for VAT?

Almost never. The UK VAT registration threshold is £90,000 of taxable turnover in a rolling 12-month period, and most self-employed labourers earn £25,000–£38,000. You only need to register if your turnover crosses £90,000 — at which point CIS still applies, but you'd start charging VAT on your invoices.

Why is my CIS refund larger than the tax I actually owe?

Because 20% CIS is deducted from your entire gross income — including the £12,570 covered by your personal allowance, which is tax-free. Once you file Self Assessment, HMRC compares the CIS already collected with your real tax bill and refunds the difference. Clean returns are typically paid out within 2 weeks outside the January peak, and claiming legitimate expenses (PPE, mileage, CSCS) increases the refund further.

Related Guides

• How CIS works for subcontractors — registration, deduction rates, and the basics
• Allowable expenses for CIS subcontractors — full list of what you can and can't claim
• Claiming back CIS deductions — step-by-step refund process
• How long does a CIS refund take? — typical HMRC timelines and common delays

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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
• CSCS card types — CSCS