Free Tools for UK Tradespeople
Handy calculators to help you price jobs, handle tax, and run your trade business. No signup required — completely free.
VAT Calculator
Add or remove VAT instantly. Supports 20%, 5%, and custom rates. Reverse VAT calculation included.
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Remove VAT Calculator
Take the VAT off a price that already includes it. Works out the net price and the VAT to reclaim at 20% or 5%.
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CIS Deduction Calculator
Calculate CIS deductions for subcontractor invoices. Supports 20% and 30% rates with material costs.
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CIS Rebate Calculator
Estimate your CIS tax refund from deductions, expenses and the current tax bands. Most subbies are owed £1,200+.
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Markup & Margin Calculator
Convert between markup and margin percentages. Calculate selling price from cost and desired profit.
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Day Rate Calculator
Work out your ideal day rate based on annual salary target, working days, and expenses.
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Job Profit Calculator
See what a job actually made after materials, labour and other costs, plus what it paid you per day.
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VAT Flat Rate Scheme Calculator
Compare the flat rate scheme against standard VAT, with the 9.5% and 14.5% construction rates built in.
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Payments on Account Calculator
Work out your 31 January and 31 July instalments, the balancing payment, and what January really costs.
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Company Van Tax Calculator
Benefit in kind on a company van and van fuel for 2026/27, including the nil charge on electric vans.
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Mileage Allowance Calculator
Claim business miles at the 2026-27 HMRC rates: 55p a mile for the first 10,000 in a van or car, then 25p.
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Late Payment Interest Calculator
Work out statutory interest at 8% over base rate and the £40, £70 or £100 compensation on a late business invoice.
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Need more than a calculator?
Traddie handles quotes, jobs, invoices, VAT, CIS, and payments — all in one app built for UK tradespeople.