California's gas tax rate and how it works

California's gas tax is 53.6 cents per gallon as of 2024. This rate includes both the state excise tax (set by California law) and a sales tax applied on top of the fuel price. The state excise tax itself is 51.1 cents per gallon, but the final amount you pay varies slightly by county because sales tax rates differ across California.

The gas tax is automatically added to your bill at the pump—you do not see it as a separate line item. When you buy a gallon of gas, you are paying the base fuel price plus this state tax plus your local sales tax. The total appears as one number on the pump display.

California's gas tax is one of the highest in the nation. It funds road repairs, public transit, and other transportation infrastructure through the state's Road Repair and Accountability Act, passed in 2017. The tax rate adjusts annually in November based on inflation, so the exact amount changes from year to year.

Key Takeaways

  • California's gas tax is 53.6 cents per gallon as of 2024, made up of a state excise tax plus local sales tax.
  • The tax is included in the price shown on the pump—it is not added separately at checkout.
  • The rate adjusts each November to account for inflation, so the amount you pay changes annually.
  • Revenue from the gas tax funds road maintenance, highway improvements, and public transportation projects across the state.
  • Your exact total cost per gallon varies by county because each county has a different sales tax rate.

Why California's gas tax is higher than other states

California's gas tax funds a specific set of transportation projects under the Road Repair and Accountability Act. The law dedicates revenue to fixing potholes and cracked pavement, maintaining highways, and supporting transit systems. Because California has aging infrastructure and high construction costs, the state set the tax rate higher than many neighboring states to generate enough money for these repairs.

The state also cannot use federal gas tax revenue the way other states do, because California has stricter environmental standards for fuel. This means the state must fund more of its transportation work independently. The combination of these factors—infrastructure needs, construction costs, and environmental regulations—results in a higher per-gallon tax than you would pay in Nevada, Oregon, or Arizona.

How the gas tax rate changes each year

The California gas tax is not fixed. The state excise tax adjusts automatically every November based on the Consumer Price Index, a measure of inflation. If inflation has pushed up the cost of living, the gas tax increases. If inflation is flat or negative, the tax may stay the same or decrease.

This automatic adjustment means you may notice the pump price change in November even if the base fuel cost has not moved. The adjustment is small most years—often a penny or two per gallon—but it compounds over time. The state publishes the new rate in October, so you can see the change coming before November arrives.

What your gas tax money funds

Gas tax revenue in California goes to three main categories: local road repairs, state highway maintenance, and public transit. About 40 percent goes to cities and counties for fixing local streets and roads. Another 40 percent funds state highway projects. The remaining 20 percent supports public transportation, including bus systems and rail projects.

Specific projects vary by region. In the Bay Area, gas tax money has funded BART improvements and local street repairs. In Los Angeles, revenue has gone toward Metro bus and rail expansion. In rural counties, the money typically goes to maintaining state highways and county roads. You can find your county's specific projects through the California Transportation Commission website.

Gas tax versus sales tax on fuel

California charges both an excise tax and a sales tax on gasoline, and they work differently. The excise tax is a flat 51.1 cents per gallon set by state law. The sales tax is a percentage of the total price, and it varies by county—typically between 7.25 and 10.75 percent. Both are included in the price you see on the pump.

This double taxation confuses many drivers because you are paying tax on the tax. When you buy a gallon of gas, the sales tax is calculated on the fuel price plus the excise tax. This is legal in California and is one reason the total cost per gallon is higher than in states that use only an excise tax. The excise tax funds transportation; the sales tax goes to general state and local budgets.

How to estimate your total gas cost

To estimate what you pay per gallon in your county, start with the base fuel price, add 51.1 cents for the state excise tax, then add your local sales tax. For example, if gas costs $3.50 per gallon in your area and your county sales tax is 8.5 percent, the math works like this: $3.50 plus $0.511 equals $4.011, then multiply $4.011 by 1.085 to get $4.35 per gallon.

Your county's sales tax rate is available on your county assessor's website or through the California Department of Tax and Fee Administration. If you live near a county border, you may notice the pump price changes slightly when you cross into the next county—that difference is the sales tax rate change. The excise tax stays the same statewide.

Frequently Asked Questions

Is California's gas tax the highest in the country?

California's gas tax is among the highest, but not the absolute highest. Washington state and Illinois have slightly higher rates. However, California's total cost per gallon—including both excise tax and sales tax—is typically the highest or second-highest in the nation because of the sales tax applied on top of the excise tax.

When does the gas tax rate change?

The state excise tax adjusts every November based on inflation. The state announces the new rate in October. Your local sales tax rate may also change, but that happens less frequently and depends on your county's tax decisions, not the state gas tax schedule.

Can I get a refund on gas tax?

Most drivers cannot. However, farmers, commercial fishers, and certain off-road vehicle operators may be able to claim a refund through the California Department of Tax and Fee Administration. You would need to file a claim showing you used fuel for a may have access to purpose. Check the department's website to see if your use qualifies.

Does the gas tax explore to diesel fuel?

Yes. Diesel fuel is taxed at a different rate than gasoline—currently 51.1 cents per gallon for diesel as well, though the rates are set independently. Diesel also has sales tax applied on top, just like gasoline. Heavy trucks and commercial vehicles pay this tax on every gallon they purchase.

Why did my gas price jump in November?

The most common reason is the annual gas tax adjustment that takes effect in November. The excise tax rate changes based on inflation, and you may see a noticeable jump at the pump if inflation has been high. However, the base fuel price also fluctuates based on global oil markets, so the November change may be a combination of the tax adjustment and market movement.