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HMRC internal manual

National Insurance Manual

Class 4 NICs: Structure: Annual Class 4 NICs maximum pre 6 4 2003: Contributors who are employed and self- employed: Examples: Profits do not exceed the Upper Profits Limit but maximum Class 1 NICs paid

Regulation 100 - Social Security Contributions Regulations 2001

NIM24125 provides guidance on the calculation method used to determine the Class 1,2 and 4 NICs annual maximum liability for a contributor who is both employed and self-employed during the same tax year.

The following example illustrates the calculation for a contributor whose profits for the tax year do not exceed the Upper Profits Limit but who has paid the maximum amount of Class 1 and 2 NICs payable .

The calculation method shown applies only to tax years up to and including the 2002/2003 tax year. For guidance on the Class 1, 2 and 4 NICs annual maximum for tax years from 2003/2004 see [### Regulation 100 - Social Security Contributions Regulations 2001

NIM24125 provides guidance on the calculation method used to determine the Class 1,2 and 4 NICs annual maximum liability for a contributor who is both employed and self-employed during the same tax year.

The following example illustrates the calculation for a contributor whose profits for the tax year do not exceed the Upper Profits Limit but who has paid the maximum amount of Class 1 and 2 NICs payable .

The calculation method shown applies only to tax years up to and including the 2002/2003 tax year. For guidance on the Class 1, 2 and 4 NICs annual maximum for tax years from 2003/2004 see](https://www.gov.uk/hmrc-internal-manuals/national-insurance-manual/nim24150) onwards.

The example uses the rates and limits in force during the 2002/2003 tax year.

Mr Roberts has been self-employed for the whole of the 2002/2003 tax year. His profits for the year amount to £20,000. Mr Roberts was also employed during the 2002/2003 tax year and has paid the maximum amount of Class 1+ 2 NICs due. The total amount of amount of Class 1 and 2 NICs paid by Mr Roberts is £2,628.80

Step 1

Calculate the Class 2 and 4 maximum for the tax year.

Class 4 = £30,420 (UPL) - £4,615 (LPL) x 7% = £1,806.35
   
Class 2 = £2.00 x 53 = £106.00
Class 2 + 4 maximum = £1,912.35

Step 2

 

Deduct from step 1 the amount of Class 1 and 2 NICs paid

£1,912.35 - £2,628.80 = minus £716.45

Step 3

If the result of step 2 is a negative figure, no Class 4 NICs are due

If the result of step 2 is a positive figure that is the maximum amount of Class 4 NICs due

As the figure at step 2 is a negative figure, Mr Roberts is not liable to pay any Class 4 NICs.