But this regulation does not apply, so that the tax period remains a month, in respect of amounts of retrospective employment income.

“The average monthly amount” is the average, for tax months falling within the current tax year, of the amounts found by the formula—

In paragraph (2)—

• P is the amount which would be payable to the Inland Revenue under regulation F1267G F14, as adjusted by regulation 67H(2) where appropriate, or 68 F9but disregarding any amount payable in respect of retrospective employment incomeF7...;

• N is the amount which would be payable to the Inland Revenue under the SSCBA and the SSC Regulations disregarding—

  1. a

     any amount of secondary Class 1 contributions in respect of which liability has been transferred to the employed earner by an election made jointly by the employed earner and the secondary contributor for the purposes of paragraph 3B(1) of Schedule 1 to the SSCBA (transfer of liability to be borne by earner)29; F5...

  2. aa

     F1any amount payable under retrospective contributions regulations (see paragraph 1(2) of Schedule 4 to the SSC Regulations) in respect of retrospective earnings (within the meaning of those Regulations);

  3. c

     F5...

• L is the amount which would be payable to the Inland Revenue under regulation F1354(1) or, in Northern Ireland, 49(1) of the Student Loans Regulations (payment of repayments deducted to the Inland Revenue) disregarding—

  1. a

     the reduction referred to in paragraph (3) of F13those regulations, F5...

  2. b

     F5...

• S is the amount which would be payable by the employer to the Inland Revenue under sections 559 and 559A of ICTA30 (deduction on account of tax etc from payments to certain sub-contractors) and regulation 8 of the Income Tax (Sub-contractors in the Construction Industry) Regulations 199331F6...;

• F3...

• SP is the amount which would be payable by the employer to employees by way of statutory sick pay, statutory maternity pay, F16statutory paternity payF15, statutory shared parental pay and statutory adoption pay under the SSCBA; and

• CD is—

  1. a

     if the employer is a company, the amount which others would deduct from payments to it, in its position as a sub-contractor, under section 559 of ICTA (deduction on account of tax etc from payments to certain sub-contractors);

  2. b

     in any other case, nil.

In this regulation—

• “employed earner” has the same meaning as in the SSCBA;

• “SSCBA” means the Social Security Contributions and Benefits Act 199232 or, in Northern Ireland, the Social Security Contribution and Benefits (Northern Ireland) Act 199233;

• F10...

• F10...

• F4...

• F4...