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Calculating class 1 NIC from April 2022


Published: 14 Jun 2022 Update History

National insurance relief for freeport tax sites has introduced a £25,000 threshold. ICAEW’s Tax Faculty explains the confusion surrounding when this threshold has to be taken into account in NIC calculations.

National Insurance Contributions Act 2022 says that, since 6 April 2022, class 1 secondary (employer) national insurance contributions (NIC) are charged at zero % on earnings for qualifying employees working in a freeport site, up to the freeports upper secondary threshold (FUST) of £25,000.

HMRC’s guidance for software developers (booklet EB5 2022-23) tells payroll IT developers to insert a breakpoint for FUST when calculating NIC in respect of all employees, (ie, not just qualifying freeport employees), and to do so for both primary (employee) and secondary NIC.

By contrast, The examples on how to calculate class 1 NIC in CWG2 2022-23 Employer further guide to PAYE and NIC 2022/23 para 3.9.7 NIC: zero rate of secondary rate contributions for employees working in a Freeport tax site includes the FUST only for secondary class 1 contributions for qualifying freeport employees.

HMRC’s other guidance – for instance, the chart at page eight of CA38 2022-23 showing earnings limits and NIC rates – includes FUST only for secondary class 1 contributions. This chart could also be interpreted as including the FUST for all table letters (ie, not just for qualifying freeport employees).

However, CWG2 2022-23  confirms at para 3.9.7 that: “These changes do not alter any of the rules for calculating National Insurance other than by using the Freeport rate where appropriate” and “Primary Class 1 contributions will remain unchanged”. This statement and the example appear to accord with the legislation.

The Tax Faculty noted that HMRC’s guidance on how to calculate class 1 NIC is inconsistent in What is changing for employers from April 2022.

Any differences arising as a result will add up to a few pence, depending on whether or not a breakpoint at the FUST is applied in calculations of:

  • primary and secondary class 1 NIC for non-freeport employees; or
  • primary NIC for freeport employees.

HMRC will accept either calculation for primary or secondary contributions, (ie, with or without a breakpoint at the FUST, undertaken using the exact percentage basis method or using the table method), for non-freeport employees. For qualifying freeport employees, a breakpoint at the FUST will always be needed in the secondary class 1 NIC calculation.

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