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Guides for UK subbies

Plain-English answers about CIS, tax and getting paid, written by a groundworker and checked against GOV.UK.

CIS refunds · 23 October 2026How to claim your CIS tax refund, step by stepWhat you need, the deadlines, and the mistakes that hold refunds up. Tax & expenses · 23 October 2026What expenses can CIS subcontractors claim? The full listTools, PPE, van, phone, training — and the things HMRC won't allow. CIS basics · 23 October 2026How to register for CIS and drop from 30% to 20%What you need, how to register, and why contractors might still take 30%.

Want the numbers for yourself? Try the free CIS tax refund calculator, CIS deduction calculator or mileage calculator.