Most workers in the UK will need to pay National Insurance contributions. It funds state benefits such as
pensions, unemployment benefit, and statutory sick pay. For the self employed, National Insurance contributions are paid via your self assessment tax return, whilst this will be deducted from employees' pay.
There are several types of NI contributions. Those applicable to you will depend on your circumstances and earnings.
Calculate your self employed national insurance contributions below and scroll down to find out about the types of national insurance, rates and allowances.