Free tools
Calculators for UK tradespeople
Quick, free calculators for the numbers you check most often. No sign-up required.
Tax calculator
Estimate Income Tax and Class 4 NI on your self-employment profit.
VAT calculator
Add or remove 20% VAT from any amount.
Hourly rate calculator
Work out what to charge per hour based on your target income.
Profit margin calculator
Check your margin and markup on materials and labour.
Mileage calculator
Calculate your HMRC-approved mileage allowance.
Late payment calculator
Work out statutory interest and compensation on an overdue invoice.
CIS calculator
Calculate the CIS deduction on a subcontractor payment.