California Gas Tax Increase July 2024 Update. The excise tax on diesel fuel will increase from 44.1 cents per gallon to 45.4 cents per gallon. Beginning july 1, california is set to face a gas tax hike, which will increase the tax rate by two cents, adjusting for inflation.
That will put it at 59.6 cents per gallon. Changes to the excise tax happen every july based on changes in the california consumer price index.