Is it better to pay class 4 as well class 2 NI contributions?

textbook

With a profit of £8420 you only pay class 2 NI contributions and not class 4.  Will you lose out on anything e.g. pension .   Or anything else by not paying it and only paying the class 2 ?

Jeremy535897

Class 4 NIC is just tax by another name. No benefits accrue from paying it.

molerat

Class 2 is what you need for SP and some other benefits, class 4 is purely a tax. https://www.gov.uk/national-insurance/what-national-insurance-is-for