Free tools for UK tradespeople
Practical tools for running your business. Simple answers to everyday self-employment questions, explained in plain English.
Free tools
Reverse charge VAT checker
Not sure whether to charge VAT on a construction invoice? Answer a few questions to see if the domestic reverse charge applies, with the invoice wording you need.
Check your invoice→UK construction · Updated July 2026CIS tax refund calculator
Contractors take CIS off your pay as an advance on your tax. Most subcontractors are owed money back. Enter three figures to estimate your refund.
Estimate your refund→CIS subcontractors · Updated July 2026Self-employed tax calculator
How much tax will you pay as a sole trader, and what is left to take home? Enter your income and expenses for an estimate.
Work out your tax→Sole traders · Updated July 2026Day rate calculator
What should you charge a day? Realistic rates by trade, region and experience, triangulated from real sources, with what it leaves you after tax.
See day rates→UK trades · Updated July 2026Expense checker for UK trades
Not sure if you can claim something? Search an expense and get a simple answer with real examples and HMRC-based guidance.
Check your expense→Sole traders · Updated May 2026Mileage allowance calculator
Enter your business miles and vehicle type to instantly calculate your HMRC mileage claim for the tax year.
Calculate your claim→Sole traders · Updated July 2026Letter before action generator
Chasing an unpaid invoice? Build a formal letter before action with the right wording, deadline and rules for an individual or a limited company.
Generate your letter→UK trades · Updated June 2026Less admin.
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