The operators of Little India, on Harrington Street in Hobart, were accused of paying 17 staff unlawfully low flat rates, including an international worker and two staff aged between 18 and 20.

The underpayments ranged from $270 to $15,224, and have since been rectified. The largest amount occurred between 2017 and 2019, while others were between January and June, 2019.

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Inspectors started their investigation into the business following a request for assistance from an employee.

The owners, Satchithanantha N Chelliah and Mahesvery Toolseram, were accused of failing to meet various entitlements including minimum wages, casual loading and penalty rates.

Fair Work Ombudsman Sandra Parker said it was vital that restaurant owners were aware of their obligations to casual workers.

"Businesses are on notice that they must pay all workers according to Australia's lawful minimum pay rates or risk facing legal action from the regulator," she said.

"We prioritise investigating matters involving young and migrant workers. Any workers with concerns about their rights should contact us for free advice and assistance."

The FWO is requesting orders that the restaurant owners commission an independent audit of wage payment practices to be provided to the Ombudsman, obtain workplace training and complete employer courses.

Mr Chelliah and Ms Toolseram will appear at a directions hearing in the Federal Circuit Court in Hobart on December 3.