Paying NI part time jobs

[Memyselfmilly]

I have 4 part time jobs

job 1: School A - 2.5k a year, paid monthly in equal 12ths
job 2: School B - 1.8k a year in equal 12ths

School A and B are part of the same academy however I am paid in individual payments from the schools.

job 3: School C. Zero hours contract - will probably work out to about 8k per year but some months paid more than others

job 4 - Company D. Zero hours contract - only about £500 per year.

how should National Insurance contributions be accounted for in each role?

You should pay NI on earnings above £12,570 per annum. If you have multiple jobs, each employer will deduct according to what you've earned only with them. They deduct it looking only at each month, whereas tax adjusts itself across the financial year as the months go by. It's not like tax in that HMRC can fiddle about with your tax codes across multiple employments. Due to your earnings, it seems likely you're going to underpay NI and so it's worth contacting HMRC and seeing if you have any gaps and you may decide to make voluntary contributions...it's a case of being proactive about it unfortunately as each employer is only concerned with your earnings with them on a month-by month basis an no one is looking at the big NI picture (unlike tax).

Thank you!! I’m actually paying NI on both job 1 and 2? Is that not right then?

Doesn't sound right if they are £2.5k and £1.8k a year...you shouldn't pay anything if earnings are below £1,048 in a month...if you get back pay or something it might fall above this?

NI is calculated on a per job basis, unlike Income Tax which is calculated across all jobs.
Therefore you can have some jobs in which you pay NI, and others in which you do not.
In 2024/25 tax year, lower earnings limit for NI is £123 per week/£533 per month. If you earn that amount or more, you will get NI credit and then if earnings is £242 per week/£1048 per month then you pay NI Class 1 contributions on your earnings from that threshold (called the Primary threshold) until you reach the Upper Earnings threshold (£967 per week/£4189 per month).

Does not sound right that you are paying NI on a job in which you earn £2.5k per year. Have a chat with HMRC, see if they can see a reason why you would be paying that.