Self-Employed Glazier Tax UK 2026/27: Profit, NI and Take-Home
A worked 2026/27 example of Income Tax and Class 4 National Insurance for a self-employed glazier, plus the glass, tools and van expenses that reduce taxable profit.
Taxing glazing profit, not turnover
A self-employed glazier's tax bill is based on profit — money taken in from fitting and repairing glass, minus the cost of glass stock, cutting and lifting tools, sealants, safety equipment and van running costs. That net figure is reported through Self Assessment and taxed under Income Tax and Class 4 National Insurance rules.
Worked example: £38,000 profit
Taxable income: £38,000 − £12,570 = £25,430, taxed at 20% basic rate, giving Income Tax of £5,086. Class 4 National Insurance: (£38,000 − £12,570) × 6% = £1,526. Combined tax and NI of £6,612 leaves take-home profit of roughly £31,388.
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The taper above £50,270
Once profit passes £50,270, Income Tax rises to 40% while Class 4 National Insurance drops to 2%, a combined marginal rate of 42% — considerably higher than the 26% rate below the threshold, and a common trigger for reviewing pension contributions.
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A self-employed glazier on £38,000 profit keeps around £31,388 in 2026/27 — about 83% of profit — after Income Tax and Class 4 National Insurance. Careful expense tracking on glass stock, tools and vehicle costs is the main lever for keeping the bill down legitimately.
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Frequently asked questions
How is a self-employed glazier taxed?
A self-employed glazier pays Income Tax and Class 4 National Insurance on business profit (turnover minus allowable expenses), declared through an annual Self Assessment return.
How much tax does a glazier pay on £38,000 profit in 2026/27?
On £38,000 profit, Income Tax is £5,086 and Class 4 National Insurance is £1,526, leaving take-home profit of roughly £31,388 after tax and NI.
Can a glazier claim glass stock and cutting tools as expenses?
Yes, glass sheets, cutting tools, suction lifters, sealants, safety equipment and van running costs used for the business are generally allowable expenses that reduce taxable profit.
Do glaziers need public liability insurance and is it deductible?
Public liability insurance is not legally required but is standard practice given the injury risk of handling glass, and the premium is a fully allowable business expense.
Is Class 2 National Insurance still charged to self-employed glaziers?
No, Class 2 was abolished for most self-employed people from April 2024. Profits above £7,105 still count as qualifying years for the state pension without an actual charge.
When must a self-employed glazier register for VAT?
Registration becomes compulsory once turnover exceeds £90,000 in any rolling 12-month period; many sole-trader glaziers stay under this and are not required to register.
Can a glazier claim for a van and equipment through capital allowances?
Yes, vans and larger equipment such as glass-handling frames can typically be claimed through the Annual Investment Allowance, giving full tax relief on the cost in the year of purchase.
What is the combined tax and NI rate on glazier profit above £50,270?
Above £50,270, Income Tax rises to 40% and Class 4 National Insurance falls to 2%, a combined marginal rate of 42% on that portion of profit.
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