Adelaide-based firm Hills Holdings has reported a half-year loss of almost $74 million.

For the six months to the end of November, Hills recorded a loss of $73.6 million.

The loss has been attributed to restructuring and closure costs, and various one-off accounting impairment charges.

Excluding those one-off costs, the company says its net profit after tax amounted to $8.2 million.

No dividend was paid and no profit guidance has been given for the full financial year.

Investors were not impressed, and had pushed the company's share price down more than 10 per cent to 98.5 cents by 1:08pm (AEDT).