Ca Gas Tax Increase 2026 Update. The tax on diesel fuel will rise by 1.3 cents to 45.4 cents a gallon. Gavin newsom continue to haggle over rebates.
The tax on diesel fuel will rise by 1.3 cents to 45.4 cents a 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.