Durham are expected to post accounts showing a near £2m loss for the 12 months up to September 2012.
The county did not stage a Test in 2012, relying on one-day international tickets sales for extra revenue.
"Provincial Test grounds in those years without a Test usually lose between £2m to £4m." Durham chief executive David Harker told BBC Look North.
Aussies in Durham
- Chester-le-Street will stage the fourth Test between England and Australia, scheduled from Friday 9 to Tuesday 13 August
This summer's Ashes Test in August against Australia at Chester-le-Street is likely to reduce the losses in 2013.
New seating has been installed to
increase capacity in time for the series, funded in part by loans from the County Council and the North East Regional Development Fund.
"We anticipate the best part of £20m in terms of cash generated for the region," said Harker.
However despite the influx of funds, the Test match will only reduce losses rather than turning in a profit.