Free calculators for UK tradespeople

Ten calculators that work out a figure you need on site. Each page shows the method in words as well as the worked answer, so the page is still useful with the calculator removed. Every rate is read from gov.uk or HMRC on the day shown on that page.

All ten are free. No email. No sign-up.

How they work

Each calculator sits on a page that explains the sum in words, shows a worked example, and lists common amounts in a table. The calculator is the quick way. The words are the backup. If JavaScript is off, the explanation and the table still give you the answer.

Every rate is read from gov.uk or HMRC on the day shown on that page. The date sits on the page beside the link so you can check it. No figures are invented and no figures are taken from another app’s website.

VAT and CIS

• VAT calculator: add or remove VAT at 20 percent, 5 percent and 0 percent, with the reverse sum shown and a table of common amounts.
• Remove VAT calculator: take VAT off a VAT inclusive price, with the common mistake named.
• CIS calculator: CIS deductions at 20 percent, 30 percent and 0 percent, worked on labour only, with materials shown outside the deduction.

Pricing the job

• Job profit calculator: what a job made from income less labour, materials and other costs, with the app version named.
• What to charge: build the price from days, materials, paperwork and contingency.
• Day rate calculator: turn a target income into a day rate using costs and billable days.
• Markup calculator: markup and margin, which are not the same figure.

Getting paid

• Late payment interest calculator: interest at 8 percent above the Bank of England base rate, and your own fixed rate.
• Mileage allowance calculator: HMRC mileage rates, with the warning about claiming actual costs for the same vehicle.
• Missed call cost calculator: what missed calls cost in a year, from your two numbers.

Every one of these is free. No email, no sign-up.

Join the list

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