The state Senate is set to consider a one-month budget on Wednesday that would cover certain vital services and pay for state workers.
The House has already approved the stopgap budget, something Republican Gov. Bruce Rauner has said he will not support.
Illinois has been without a spending plan for the past two weeks as the impasse over the state's 2016 budget continues.
Wednesday is also the last day for state lawmakers to try to override Rauner's vetoes of Democrat-passed legislative budget bills. Rauner vetoed most of the Democrat's $36 billion spending plan due to its $4 billion shortfall. The governor did, however, sign a budget bill for K-12 and early childhood education, meaning schools will open on time if the budget stalemate persists.
Overriding Rauner's budget vetoes would require a supermajority vote in both chambers. The House appears short on votes necessary for an override.
UPDATE (4:46 p.m.): The one-month budget cleared the Senate Wednesday on a 39-0-15 vote. It now goes to the governor, who has said he will not support such a measure. The Senate also reversed Rauner's vetoes of five budget bills.