The budget is expected to suspend debt payments, reduce payments for retiree medical benefits and increase revenue through code enforcement and parking citations, among other steps.
City lawyers could file for Chapter 9 protection in court as soon as Wednesday.
The river port city of 290,000 in Central California has seen its property taxes and other revenues decline, while expensive investments and generous retiree benefits drained city coffers.
In the past three years, officials in the city that was slammed by the collapse of the housing market dealt with $90 million in deficits through a series of drastic cuts.
They eliminated one-fourth of the city's police officers, one-third of the fire staff, and 40 percent of all other employees. They also cut wages and medical benefits.
To plug next year's anticipated $26 million budget shortfall, a proposed budget to be considered Tuesday night