Northland's MP says a business lost almost half a million dollars thanks to the recent major power cut.

Grant McCullum is calling on Transpower to compensate Northlanders with discounted transmission fees for a year.

Nearly 100,000 people lost power last month when a tower toppled after maintenance crews unbolted three legs of a pylon at once.

McCullum says a big timber mill had to shut for five days - costing it nearly $500,000.

"This is an opportunity for all Northlanders to get something back, because everyone was affected. Whether it was your people at home having cold showers - or that sort of thing."

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