"Banks are starting to talk about a $6 payout but there's a lot of debt to be repaid to get back to square one. I think if we had another lift in GDT [global dairy trade] next week, that could easily increase the payout."
Mr Cullen said the first part of the winter season had been pretty depressing with rain coupled with low dairy payout estimates.
A forecast price of $5.25/kg will bring $472.5 million into the Northland economy but a $6 payout will add $67.5 million.
Responding to predictions the final payout could hit the $6 mark, Fonterra said the current forecast of $5.25 per kg of milk solids remained its best price estimate.
A spokeswoman said if there was any update to the current forecast, the dairy giant was obliged by law to disclose it to the farmers first.
Federated Farmers last week said prices needed to hold up until the next dairy auction.
Buyers were responding to news that New Zealand and Australian production would be down, Europe was flat and only the United States was showing signs of an increase.