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HMRC internal manual

National Insurance Manual

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HM Revenue & Customs
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Earnings Periods: Employee starts work

Regulation 3(1), SS(C)R 2001

Under Regulation 3(1) of the Social Security (Contributions) Regulations 2001, when anemployee starts work, their expected earnings period comes into force from the start date.

The earnings period is determined by the regular interval between which the payment ofearnings will be made. For example, an employee who will be regularly paid on a weeklybasis will have a weekly earnings period. The more common pay periods for employees are–

  • Weekly;
  • Monthly;
  • Two weekly;
  • Four weekly

Example

If an employee starts work on 10 August and is due to be paid monthly on the last day ofthe month, the earnings period will be monthly. A monthly earnings period will also applyto the first payment, although the earnings will only cover the period 10th August to 31stAugust If the employee leaves the job before the end of the first earnings period, eg 20August, NICs on the first and only earnings payment are still calculated on a monthlybasis.