This is an area of increasing risk which can be demonstrated by the following example:
A graduate has a £27,000 annual salary and contributes 5% to their pension under a salary sacrifice agreement. Their pay for NMW purposes is £25,650 (£2,137.50/month) - only just above NMW based on a 40-hour week.
Whilst they are paid at a headline rate above NMW, it is possible that they could breach NMW in a pay period even without working any overtime. The calculation to check whether NMW has been paid in this case depends on whether they are a ‘salaried’ or ‘unmeasured’ worker for the purposes of the NMW Regulations.
There are a number of conditions to be met to be classed as a ‘salaried’ worker for NMW purposes. In particular, the number of basic annual hours an employee is required to work must be ascertainable. This is not always possible to demonstrate.
If the employee does not meet the conditions to be a salaried worker they will be treated as an unmeasured worker. This means that NMW must be paid for each pay period based on the hours actually worked. If for example there are 22 working days in a month, this worker would need to be paid for 22 x 8 hours = 176 hours. At minimum wage, this would be £2,148.96- an underpayment that HMRC could enforce of £11.46.
Also, if the employee works overtime which is not recorded and paid, this could create further breaches. HMRC will seek to establish the facts by reference to records and worker interviews.
Salaried worker status can alleviate the problem of having to consider exactly how many hours are worked in a pay period but it does have its own complexities around monitoring overall hours worked so it is not automatically a ‘better’ option.