You have 3 levels of taxes.
[Tax year 2007-2008]
10% up to £2,230 annual gross income
22% up to £32,370
40% above £32,370
The main personal allowance is £5,225
(Example: if you earn £50,000 you will pay:
10% * 2,230 + 22% * (32,370 - 2,230) + 40%
* (17,630 - 5,225)= £11,816 ).
When you have not registered with the Inland Revenue, you
get a temporary insurance number (TN+date of birth+M
for masculine, F for feminine), which is used to establish
your tax level. So, before getting your NI
number you may pay too much tax (sort of “Emergency
tax”) and you can ask for a refund
later. In your letter
of complaint, you will attach your P60 and payslip
of April last tax year, and include the reference number
of your company and your NI number.