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California Gas Prices to Jump Up to 70 Cents on July 1 Under New Tax and Fuel Rules

Declining refinery output under tighter carbon standards is expected to amplify the impact of the tax hike on pump prices.

Overview

  • On July 1, California will increase its gas excise tax by 1.6 cents to 61.2 cents per gallon and raise diesel taxes to 46.6 cents.
  • Amendments to the Low Carbon Fuel Standard approved in late 2024 will impose stricter carbon intensity limits on fuels, adding as much as 65 cents per gallon in compliance costs.
  • Analysts estimate that the combined measures could lift pump prices by nearly 70 cents per gallon, driving averages close to or above $6 by the end of this year.
  • A University of Southern California study forecasts that prices could reach $8.40 per gallon in 2026 if refining capacity continues to decline.
  • Recent refinery closures and maintenance disruptions have reduced California’s in-state processing capacity by more than 25 percent, increasing reliance on external fuel supplies.