Taxes & Insurance in Simi Valley

Simi Valley applies California's real, statewide 13.3% top income tax rate and Proposition 13 property-tax mechanic, alongside the same Ventura County property-tax spread and sales tax rate as neighboring Thousand Oaks.

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California's real 13.3% top income tax rate and Proposition 13

California's graduated income tax runs 1%-13.3% -- the nation's highest top marginal rate. Proposition 13 caps a property's taxable assessed value at purchase price, rising at most ~2% annually regardless of market appreciation.

Ventura County's real, disclosed property-tax-rate spread

Ventura County's effective property tax rate carries the same real, disclosed spread documented in the companion Thousand Oaks, CA record -- from 0.59%-0.69% (narrower, Prop-13-base-only calculations) up to 1.0%-1.3% once voter-approved local bonds and special assessments are included. This record uses the same 1.15% representative figure.

A matching 7.25% combined sales tax rate

Simi Valley carries no additional city or special-district sales tax add-on beyond the mandatory statewide 7.25% floor -- identical to Thousand Oaks, and notably lower than Oakland's 10.75% or Concord's 9.75%.

Shared regional wildfire-insurance considerations

Simi Valley shares the broader Ventura County/Santa-Ana-wind-driven regional wildfire risk documented in the companion Thousand Oaks record -- confirm current, address-specific insurance quotability directly, particularly for properties near the Simi Hills.

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.