Calculators for the self-employed

Add VAT to a price or take it off, at 20%, 5% or any rate. Shows the VAT amount and the prices with and without VAT.

Work out the income tax and Class 4 National Insurance you'll pay as a self-employed sole trader, and how much to set aside each month.

Work out the day rate and hourly rate you need to charge as a freelancer or contractor, allowing for holidays, costs and unpaid admin time.

Work out profit margin and markup from cost and price, or the selling price you need for a target margin or markup.

Work out the statutory interest and compensation you can claim on a late business invoice in the UK: 8% plus the Bank of England base rate.