"It's really disappointing to see this level of non-compliance where the employer has just completely failed to meet the clear expectations set out in New Zealand's employment law,'' Milne said.
"Pleading ignorance is no excuse - providing employees with at least the minimum wage, holiday pay, and written employment agreements are basic obligations which we expect every employer in New Zealand to meet.
"Taking advantage of employees is never acceptable, particularly vulnerable workers such as the migrants in this case, who were older, did not speak English, and were unaware of their rights and entitlements in New Zealand."
The breaches were discovered after the five employees approached a Labour Inspector two years ago.
An investigation found the group had all been working long shifts - from 10am to 10pm - six days a week. They were only paid the minimum wage for 40 hours, however, and were not granted sick leave.