National Insurance contributions (NICs) will increase by 1.25% for one year only for employees, employers and the self-employed from‌‌ ‌April‌‌ ‌2022. This will cover both Class 1 (employee and employer), Class 1A and 1B and Class 4 (self-employed) NICs. Those above State Pension Age are not impacted by the April 2022 changes.

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https://content.govdelivery.com/accounts/UKHMRCED/bulletins/2f04b49