The transit agency is facing a $54 million deficit in the new fiscal year, starting in July.
A preliminary budget proposal will be presented at Thursday's board meeting.
On top of the proposed fare increase, a BART spokesman says riders can also expect to wait longer for trains on weeknights and weekends this summer under the proposal.
The plan also would cut 100 positions, 85 of which are currently vacant. It also calls for no wage increases for current employees.