Taxes in Santa Rosa

Santa Rosa applies California's statewide tax structure -- a real, current 13.3% top marginal income tax and a real 7.25% statewide base sales tax -- alongside Santa Rosa's own genuinely high 10% combined local sales tax rate and Sonoma County's below-average property tax rate.

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California's 13.3% top marginal income tax -- the highest in the US

California's real, current graduated income tax runs nine brackets from 1% to 12.3%, plus a 1% Mental Health Services Act surcharge on income over $1,000,000 -- an effective 13.3% top marginal rate, the HIGHEST top marginal state income tax rate in the US, applying identically in Santa Rosa.

Sonoma County's below-national-average property tax rate

Sonoma County's effective property tax rate ran a real, disclosed 0.72% (median annual bill approximately $5,580) -- genuinely below the national average of approximately 0.91%, though subject to California's Proposition 13 mechanic.

Proposition 13's real assessed-value cap

A property's assessed value is set at purchase price and can rise at most approximately 2% per year for as long as the same owner holds it, resetting to market value only upon sale -- producing a real, often dramatic gap between a long-time owner's tax bill and a recent buyer's on an identical home.

Santa Rosa's own real, high 10% combined sales tax

Santa Rosa's combined sales tax rate runs a real, disclosed 10% (6% state general fund + 0.25% Sonoma County + 0.75% city + 3% special district) -- notably higher than Sacramento's own 8.75% combined rate documented elsewhere in this project's California build.

Key takeaways

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Last reviewed: 2026-08-25. Independent research; not financial, tax, or legal advice -- confirm current figures with a local professional before making a decision.