NIM24600 - Class 4 NICs: computation of liability: summary

Section 15 SSCBA 1992

The following sections look at the computation of the Class 4 NICs profits.

The self-employed pay Class 4 NICs on profits immediately derived from the carrying on of a trade, profession or vocation (Section 15 SSCBA 1992 refers).

This guidance relates to periods after the introduction of Self-Assessment. For guidance on earlier periods contact CT&VAT (Technical).

Guidance on deferment can be found in the National Insurance Deferment Manual.