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National Insurance

Trying to help out my daughter but not getting very far with HMRC or the accounts department that pay her wages.
When I used online calculator on the web site (lives in Scotland), 22 year old.
It says she should pay £390 N.I. however she has paid £622.35.
I know the first £1048 every month is deducted from gross pay the remainder is subject to NI percentage 12% for first 9 months then 10% last 3 months 2023/24 tax year.
Her NI payments for the 9 months she paid is correct but hasn’t taken into account her first 3 months where she earned less than £1000.
Is that how it works?
2023/24
Gross pay £15,960.71 PAYE £692.20 N.I. £622.35
Tax month 12 gross pay £1871.15 - £1048 = £823.15 = NI £82.31 (10%)
Tax month 11 gross pay £1379.40 - £1048 = £331.40 = NI £33.14 (10%)
Tax month 10 gross pay £1949.31 - £1048 = £901.31 = NI £90.13 (10%)
Tax month 9 gross pay £1744.00 - £1048 = £696.00 = NI £83.52 (12%)
Tax month 8 gross pay £1726.66 - £1048 = £678.66 = NI £81.44 (12%)
Tax month 7 gross pay £1900.06 - £1048 = £852.06 = NI £102.24 (12%)
Tax month 6 gross pay £1642.85 - £1048 = £594.85 = NI £71.38 (12%)
Tax month 5 gross pay £1298.71 - £1048 = £250.71= NI £30.08 (12%)
Tax month 4 gross pay £1448.80 - £1048 = £400.80 = NI £48.10 (12%)
Tax month 3 gross pay £332.45 NI £0.00
Tax month 2 gross pay £378.47 NI £0.00
Tax month 1 gross pay £288.85 NI £0.00
Thanks for your help, if not in the correct area if someone can point me in the direction.
Graeme
Comments
-
NI is calculated per pay period.
She cannot utilise unused elements from earlier months.
You have to do 12 separate calculations. And the outcome will 99.9999% be what has been deducted.
Don't waste any more of your time on this.2 -
NI doesn't adjust in year like tax does, it's worked out per pay period. The deductions are correct.
The online calculator you used will have assumed equal pay per month.2
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