National Insurance 2020/2021 psimonparsons National Insurance, Payroll Change April 2020 18th April 202018th April 2020 1 Minute The following are National Insurance calculation resources for 2020/2021 tax year. Rates and threshold CA38(2020) PAYadvice.UK 17/4/2020 TwitterFacebookPrintLinkedInEmailLike this:Like Loading... Related Published by psimonparsons View all posts by psimonparsons Published 18th April 202018th April 2020