He also urged the General Assembly to convene and stay in session until the plan is passed and signed into law.
"I'm not satisfied with the pace of where we are, and neither are they," Rendell told reporters.
The Democratic governor said he was not worried that the handshake deal was falling apart in the face of opposition to some of its elements, including drilling for gas on state land and taxing small games of chance.
"There's always opposition to certain parts of the budget," he said.
Rendell had said Sept. 18 that he would disclose details after rank-and-file lawmakers were briefed on the deal, but Monday he said the spending cuts remained somewhat up in the air.
Rendell said he urged House and Senate Democrats and Senate Republican leaders to wrap things up by Sunday. That would require them to resolve elements still in dispute and then get the budget bills through the divided Legislature.
"They agreed they would work toward that goal, and they agreed that goal was achievable," Rendell said.
House Republicans, who oppose the size of the budget plan and its new taxes, said they were not invited to the meeting.
Senate Republican Leader Dominic Pileggi planned a news conference later Monday.