Why California Gas Is So Expensive
California gas prices are consistently $0.80–$1.50/gal above the national average. This isn't one cause — it's a stack of California-specific costs that no other state faces simultaneously:
Highest state gas tax in the US. Most states are under 35¢.
California's climate program adds a surcharge that varies quarterly.
California requires a unique cleaner-burning blend that costs more to produce.
State fee for underground storage tank maintenance programs.
CA is largely isolated from Gulf Coast supply — relies on local refineries.
Same as every other state — the federal portion is fixed.
Add these up and California drivers pay roughly $1.30–$1.50/gal more in taxes and fees alone compared to a state like Texas, before any market premium is applied.
The CARB Blend Problem
The California Air Resources Board (CARB) requires a specific reformulated gasoline blend that produces fewer smog-forming emissions. This blend can only be produced by a handful of California-approved refineries — primarily in the Los Angeles and San Francisco Bay areas.
This creates a closed market: when a California refinery goes down for maintenance or suffers an unplanned outage, there's no easy way to import replacement supply from Texas or the Gulf Coast. The result is local supply crunches that can spike CA prices by $0.50–$1.00/gal in days — while the rest of the country sees no impact.
California vs. National Average
Historically, California trades at a $0.70–$1.00 premium over the national average. During the 2026 Hormuz crisis, the premium expanded — California hit $5.61/gal when the national average was $4.94, a spread of $0.67. In past refinery outage events (2015, 2019, 2022), the California premium temporarily exceeded $1.50/gal.
If the April 2026 ceasefire holds and crude oil falls toward $95/barrel, California could see prices dip to $5.00–$5.20/gal by May — still well above the national average, but down $0.40–$0.60 from the peak.
Compare California with other states on our gas prices by state page, or read our 2026 national price forecast.