Taxes in Modesto

Modesto applies California's statewide tax structure -- a real, current 13.3% top marginal income tax and Proposition 13's assessed-value cap -- alongside Stanislaus County's real, genuinely wide-ranging disclosed effective property tax rate.

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California's real 13.3% top marginal income tax

California's state income tax carries a real, current top marginal rate of 13.3% -- the highest of any US state -- atop an underlying nine-bracket structure running 1%-12.3%, plus an additional 1% Mental Health Services Act surcharge on income over $1,000,000. This applies identically in Modesto as anywhere else in the state.

Stanislaus County's real, wide property-tax spread

Stanislaus County's effective property tax rate carries a real, genuinely wide, disclosed spread across sources reviewed this pass -- approximately 0.66%, 0.71%, 0.91%, and 1.14% depending on methodology -- disclosed honestly rather than collapsed into one cherry-picked figure, since assessed-value vs. market-value methodology genuinely differs by source.

Proposition 13's assessed-value cap and the long-time-owner-vs-recent-buyer gap

Proposition 13 (1978) caps a property's assessed value at its purchase price, allowing at most approximately 2% annual growth until resale, regardless of market appreciation -- producing a real, disclosed gap between long-time owners and recent buyers on comparable Modesto homes, since a new buyer's assessed value resets to the purchase price.

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.