For further information, generally, about the national minimum wage (NMW), see Practice Note: National minimum wage. Determining whether or not a worker is being paid the minimum wage involves, in essence, working out an hourly rate of pay by dividing payments received by hours worked in a pay reference period. For the first part of this calculation, it is necessary to calculate the worker's total pay in a pay reference period. For further information, see Practice Note: National minimum wage, in particular the main section dealing with Checking pay against the minimum. The second part of the calculation involves working out the number of hours worked in the pay reference period. To do this, it is necessary to identify which hours count (and do not count) as hours worked for which the NMW is payable, then count