Electoral Commissioner Rachel McCallum made the warning in correspondence to the parliamentary committee overseeing the agency's budget, saying a multimillion-dollar funding shortfall had created "extreme risks" to the commission's ability to run elections.
The correspondence says the government has refused, over a series of budgets, to fund a replacement for the commission's IT system. McCallum also said the denial of a request to roll over funding from the previous budget to pay for the 2027 election had caused "unnecessary financial risks ... at a critical time".
The intervention comes less than six months out from the next state poll. The commission has long urged governments of both major parties to increase its funding, warning as far back as 2019 that it faced a "critical degree of urgency" as its responsibilities expanded.
In a separate statement, a commission spokeswoman said its budget for the 2027 election "continued to be stretched" and noted recent concerns about AI agents accessing Australian public sector websites.
The warning is an unusually blunt public intervention by an independent electoral watchdog about the integrity of an upcoming vote.