According to CalMatters Housing, California's Supreme Court recently ruled that cities cannot require taxpayers to jump through additional local hoops before seeking tax refunds through the state court system. This was a procedural win for Marathon Petroleum in an ongoing tax dispute with the city of Carson, which operates one of the state's largest oil refineries.
The case centered on Carson's business license tax for the petroleum industry. Back in 2022, Carson informed Tesoro, Marathon's subsidiary that operates the refinery, that the company owed additional taxes under the city's local ordinance. Marathon paid what was demanded but disagreed with the assessment and then filed for a refund under state law. Lower courts sided with Carson, saying the company should have exhausted local appeals first, but the state Supreme Court overturned those decisions.
What makes this significant is that Carson and other local governments argued that allowing companies to bypass local procedures would weaken their ability to govern. They wanted taxpayers to work through their appeal systems first. Marathon countered that such local processes create a confusing maze of requirements, and the state's Government Claims Act was designed to prevent companies from getting lost in that labyrinth.
The Supreme Court's decision didn't actually resolve the core dispute about whether Carson correctly calculated how much of Marathon's refining activity actually happens within city limits versus nearby Wilmington. However, immediately after the ruling, Carson took a major step toward settlement by withdrawing a new ballot measure that would have taxed refineries at a much higher rate per barrel processed.
What I'm seeing locally in the Bay Area and throughout the East Bay is that this ruling clarifies an important principle about how local tax disputes get resolved. For property owners and businesses here, it means that when disagreements arise over local assessments or taxes, you have clearer pathways through state courts without being forced into lengthy local proceedings first. That said, this case also shows how complex and costly these disputes can become for everyone involved, which is why working with experienced advisors early on remains crucial for protecting your interests.
