One of Australia's largest political donors, the Manildra Group, has been fined $107,000 for failing to disclose some of its donations while making planning applications in NSW.

The fine, issued by the Land and Environment Court to Manildra's Shoalhaven Starches subsidiary, followed compliance investigation into the lack of disclosure on five company applications, the Planning and Environment department said.

Manildra's Dick Honan (right) showing then prime minister John Howard around the company's ethanol plant in Bomaderry. Credit:Edwina Pickles

The fine excludes $40,000 in legal costs and the order for the company to publish notices in various newspapers.

The fines relate to applications by Shoalhaven Starches to expand its Bomaderry plant.