Gov. Jerry Brown on Monday signed legislation raising California’s minimum wage to $15 an hour by 2022, the highest state wage floor in the country.

Brown, a Democrat, announced his support of the plan last week after labor groups put a $15 minimum wage proposal on the November ballot. That proposal would have reached $15 an hour one year earlier than Brown’s plan. The Legislature approved the bill on Thursday without Republican support.

The state’s minimum wage will increase from $10 to $10.50 on Jan. 1, then $11 by 2018, with annual $1 increases until 2022. Inflation-based indexing would occur after that. Brown, however, could delay the annual increases during a recession. Businesses with fewer than 25 workers would have an additional year to comply.

The higher state wage comes as San Diego is preparing for a June ballot measure to raise the local minimum wage to $11.50 and increase guaranteed sick days from three to five. The San Diego measure would reach $11.50 more than a year before the state plan.