How much do i pay national insurance if i am 16?

If you're 16 and employed in the UK, you start paying National Insurance contributions once you earn above the threshold, which is £242 per week or £1,048 per month (as of 2023). If you earn above this amount, you'll pay 12% on earnings between the threshold and £967 per week. If your earnings exceed £967 per week, you'll pay an additional 2% on the amount above that. However, if you're earning below the threshold, you won't need to pay National Insurance.