Inspired by another thread about maternity pay, NI contributions and student loans contributions.
NI and student loans contributions are calculated per pay packet and you pay whenever you go over the threshold amount for that pay packet (£184 per week for NI, or £794 per month).
SMP for example is below the weekly threshold amount so you wouldn’t pay any NI or contributions to student loans if it was paid weekly. If paid in one go, you appear to have earned 6k in a month and pay a lot of NI and Student Loan contributions. You cannot claim the NI back because it wasn’t incorrectly calculated.
This system is why all temporary, zero hours contracted and seasonal workers pay more NI than permanently employed staff with consistent hours, for the same wage. They earn more money in one pay packet than the next but NI contributions aren’t averaged out.
I wrote to the government about it in 2018 and received a letter in response saying that they knew about this but had no plans to change the system.
The government don’t give a damn that zero-hours, temporary and seasonal workers in all industries pay more NI than permanent staff and they get away with it because barely anybody realises.
If you want to figure out if you overpaid:
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Go and look at your p60 if you’re a temporary, supply or zero-hours worker and look at how much NI you paid last year.
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Then go and enter your gross salary into this website www.thesalarycalculator.co.uk/salary.php
and see how much NI you should have paid if your salary was split evenly across the year.
As a supply teacher I paid £700 more NI in a year than I would have if I was permanently employed with my wage split over 12 months.
What sector do you work in?
How much more did you pay?