UK 2026/27 tax year · Updated 2026-06-10
Builders, electricians, plumbers and other trades face a tax setup unlike most workers because of the Construction Industry Scheme (CIS). If you work as a subcontractor, contractors deduct 20% (or 30% if unverified) from your labour payments and pass it to HMRC as an advance on your tax bill — so you may be due a refund, or owe more, when you file your self-assessment. The self-employed tax calculator works out your true liability after the £12,570 personal allowance, Class 2 and Class 4 National Insurance, while the CIS guidance helps you reconcile deductions already made. Once your taxable turnover passes the £90,000 VAT threshold you must register, and the domestic reverse charge changes how VAT works between construction businesses. Tools here also help with the practical side of running a trade — fuel costs for the van, allowable expenses, and pricing a day rate that leaves you a fair profit after tax. All figures use current 2025/26 rates so you can quote, save for your tax bill and plan with confidence.
Work out what you owe and what you keep after CIS and NI.
VAT, fuel and the cost of keeping the van on the road.
Pensions and saving when there is no workplace scheme.
Want to know what this role typically earns? Electrician take-home pay guide →
Estimates for general guidance only, based on 2026/27 UK rates. Not financial advice.