National Insurance Rates
The following amounts apply for the 2009-10 tax year:
If you're employed
if you earn above £110 a week (the 'earnings threshold') and up to £844 per week you pay 11 per cent of this amount as 'Class 1' NICs
you also pay one per cent of earnings above £844 a week as Class 1 NICs
you will pay a lower amount as an employee if you are a member of your employer's contracted out pension scheme
http://www.direct.gov.uk/en/MoneyTaxAnd ... DG_4015904
Stawki
http://www.hmrc.gov.uk/rates/nic.htm
Sposob obliczania. co prawda sprzed dwoch lat ale wystarczy zmienic stawki
http://www.emito.net/?q=pl/finanse/podatki/51036.html