CAT / FIA FTX Syllabus C. Income Tax Liabilities - NIC - Weekly/monthly computations - Notes 14 / 15
NICs are calculated in relation to an earnings period
Earnings can be paid regularly (e.g. weekly or monthly).
An earnings period cannot usually be less than seven days long.
Notice:
The monthly limits are the annual limits divided by 12 and the weekly limits are the annual limits divided by 52.
The upper limit is always rounded up to the nearest £ but the earnings thresholds are rounded to the nearest £ in the usual way.