Many Queensland councils are nearing a "tipping point" where they won't be able to afford the upkeep of major infrastructure like roads, an audit report says.

The vast majority of the state’s 77 councils have no idea whether they are financially sustainable, with only 10 having prepared long-term financial plans. The Queensland Audit Office report into the long-term sustainability of local government revealed most councils were spending money without understanding how much expenditure was needed to…