California fuel · Updated every week · Figures to 24 Aug 2026
Why is Gas so expensive in California?
A gallon of regular averages $5.45 in California this week - $1.37 over the national average. The premium is real, it has grown, and it has three causes with names: taxes, the blend, and geography.
Cross into California with half a tank and the first price sign makes the point for you. This week the state's average is $5.45 a gallon against $4.08 nationally - and if you fill up here every week, that $1.37 gap is a standing charge on your driving that most of the country never sees. It isn't one villain, and it isn't a mystery either: three causes, all documented, all below.
So, what are we looking at, exactly?
Every Monday, the US Energy Information Administration surveys filling stations and publishes average prices - for the nation, and for a handful of big fuel markets it prices individually, of which California is one. The chart above is the state's weekly average for regular, back to 2000. The record is $6.27, set in the week of 13 Jun 2022. Whatever the national price does, California rides the same waves - just from a higher deck, which the next chart measures directly.
How big is the California premium?
This is the gap itself: California's price minus the national average, week by week. In the survey's first years it averaged $0.22; over the past year it has averaged $1.41, and the widest it has ever been is $2.43, in 3 Oct 2022. The premium isn't a spike that will pass - it's a structural feature that has roughly widened over the record, which is why it deserves proper causes rather than a shrug.
What the average Californian pays over the US price, per gallon, this week
$1.37
Why is gas so expensive in California?
Three reasons, stacked on top of each other, and the EIA's own explainer on regional price differences walks through all of them. First, taxes and programme costs: state fuel taxes and climate-programme charges sit on every Californian gallon, and they run higher than in most states. Second, the blend: California requires its own cleaner-burning gasoline formulation that few refineries outside the state produce, so the fuel itself costs more to make. Third, geography: the state's fuel market is close to an island - few pipelines connect it to the rest of the country's refineries - so when a California refinery goes down, relief has to arrive by ship, and prices jump in a way the Gulf Coast rarely feels. Taxes set the floor of the premium; the blend and the isolation drive the spikes.
The median gap across the whole record is $0.42. This week's $1.37 is above it - and over a 15-gallon tank, the gap is $21 every fill-up.
Calculated from the chart aboveThe record gap came in 3 Oct 2022. The spikes on the premium chart are California-specific events - the isolated market is why they read so clearly against the national line.
Calculated from the chart aboveWhat would your tank cost?
Pick a vehicle, or set your own tank, and slide the year - this calculator runs on the California series, so it prices a fill-up in the state for any week back to 2000.
Fill-up calculator · California weekly average prices
15 gal × 5.45 $/gal → $81.75
What this chart can't tell you
A state average spans a big state: the Bay Area and the desert towns sit on different sides of it, and your corner station sets its own price. The survey can't split this week's premium into its tax, blend and logistics parts - the causes above explain the gap's existence and behaviour, not each week's exact split. And the newest point is provisional until next Monday's release replaces it.
Further reading
All of our numbers come from live, free government data - the US Energy Information Administration's weekly retail gasoline survey, which prices California individually every Monday. The premium is our own subtraction, and this page updates when the new week lands.
If you want to dig deeper: the EIA's regional price differences explainer covers the taxes, blends and logistics free - and the national picture this page hangs off is our fuel prices page.