LOS ANGELES — The California Legislature passed a budget in June relying on optimistic projections of how much money the state could bring in with a growing economy. But to the surprise of few, not all of that money has materialized.

Gov. Jerry Brown said Tuesday that the state was about $2.2 billion short of its projected $88.5 billion income and that that would force hundreds of millions of dollars more in cuts to the budget, primarily to state colleges and universities as well as to health care. Under the budget the Democratic-controlled Legislature approved, if revenues are more than $1 billion short of projections, automatic reductions specified in the budget — known as trigger cuts — will go into effect.

The cuts will mean the elimination of $248 million in state financing for public school transportation and are almost certain to increase fees for college students. Still, the projections fell short of the doomsday predictions that some had worried about, which would have cut as many as seven days from the school year in some public schools. Now, schools will lose about $80 million, amounting to about $13.18 per student.

“I think we are very fortunate that at least we got half the revenue,” Mr. Brown said, announcing in a Sacramento news conference the nearly $1 billion in cuts. “So we did hope for more and we got more, but not quite as much as we wanted. The cuts are far less than they could have been. It was much wiser to assume the $4 billion, than to make the $4 billion in cuts.”