Piece workers (“output” work)
[ch 4: page 107]Workers paid according to what they produce (piece workers) have the right to a minimum fair piece rate of 120% of the NMW (regulation 43, NMWR 15). This includes home workers engaged in piece work.
Guidance on calculating the NMW for output-based piece workers can be found at the GOV.UK webpage: Minimum wage for different types of work (paid per task or piece of work done).