Jamie Hansen/The Bay Citizen

Gov. Jerry Brown

California Gov. Jerry Brown will slice $1 billion from higher education, social services and public school bus service under a revised budget forecast released Tuesday.

Most of the midyear budget cuts will go into effect Jan. 1. The so-called "trigger cuts" are tied the state's revenues, which were $2.2 billion less than the projections included in the budget approved last summer.

The University of California and California State University will each face cuts of $100 million. A proposed $100 million cutback from In-Home Supportive Services — which provides housecleaning, meal preparation and other services for the disabled, blind and elderly — is being challenged in court.

Officials with the California Community Colleges System say the cuts will likely prompt tuition hikes of $10 per unit to $46, beginning next summer.

Public school districts will lose nearly $248 million for bus services. In addition, K-12 public schools will face a $79.6 million cut to their general funds, the equivalent of half a school day. That is far less than the $1.5 billion cut that had been proposed for K-12 school districts under the state budget enacted earlier this year, which would have translated to shortening the school year by seven days.

The governor's revenue projections are $1 billion higher than numbers released by the state Legislative Analyst’s Office last month.

Still, the state’s main sources of revenue, ranging from license fees to income taxes, have grown more slowly than expected, Brown said at a news conference in Sacramento Tuesday.

“My message is that California has to exercise fiscal discipline,” he said. “We can’t go around spending in the way people would like when the tax revenues don’t generate it.”