Free calculators and checkers

Quick answers to the sums tradespeople do most: tax on your profit, what comes off a CIS invoice, what you could get back, and when your Making Tax Digital dates fall. Free, with no sign-up. Your figures stay in your browser.

For tradespeople

• Self-employed tax estimator

  Income Tax and Class 4 National Insurance on your profit, with or without a job as well, what you keep, and what payments on account could look like.

• Self-employed National Insurance calculator

  Class 4 National Insurance on your profit, whether Class 2 is treated as paid or voluntary, and the Class 4 cap if you also have a job.

• Simplified expenses calculator

  HMRC’s flat rates for your van, car or motorbike miles, working from home by hours a month, and living at your business premises.

• CIS deduction calculator

  Split an invoice into labour, materials and VAT, and see the CIS deduction and what the contractor pays you.

• CIS refund estimator

  How much of the CIS taken off your pay you could get back from HMRC.

Making Tax Digital

• MTD quarterly dates

  Your four Making Tax Digital update periods, their due dates and your tax return deadline for any tax year.

• Tax return checker

  Whether you need to send a Self Assessment tax return as a sole trader, partner or landlord: the trading allowance, rental income limits and the other GOV.UK reasons.

• Making Tax Digital checker

  Whether Making Tax Digital applies to you, from when, and when your first update is due.

What happens next

1. 1Pick the calculator closest to your question.
2. 2Read the guides for the rules behind each figure, with their GOV.UK sources.
3. 3See how Righto Tax for Trades sorts your books and prepares your quarterly figures for you to send, and join the waitlist.