Kaipara will suffer most under the region's projected dairy payout which will see a $347 million loss in income in Northland.
December projections had put the region's income loss at $330 million.
Figures released by Labour this week show the total loss has climbed to $347,478,940, with Kaipara arguably the worst-hit area with a $123,355,721 drop in income.
The dairy industry makes up 14 per cent of Kaipara's GDP, compared to Whangarei (3 per cent) and the Far North's 4 per cent.
Whangarei will lose $131,162,031 in dairying income, and the Far North $92,961,188.