How California Property Tax Works (Proposition 13)
California's property tax system is unique due to Proposition 13, passed by voters in 1978. This constitutional amendment fundamentally restructured property taxation:
- 1% Base Tax Rate — Property tax cannot exceed 1% of assessed value
- Purchase Price Assessment — Assessed value is set at purchase price when you buy
- 2% Annual Cap — Assessed value can only increase 2% per year (or CPI, whichever is lower)
- Reassessment on Sale — Property reassessed to market value when sold or transferred
However, the actual rate paid is typically 1.10%–1.35% for new buyers because of voter-approved local bonds (schools, infrastructure) and special assessments added on top of the 1% base.
California Property Tax Rates by County (2026 Estimates)
| County | Effective Rate | Notes |
|---|---|---|
| Riverside County | 1.30% | Mello-Roos common in new developments |
| San Bernardino County | 1.25% | Inland Empire infrastructure bonds |
| Los Angeles County | 1.25% | School and Metro bonds |
| Santa Clara County | 1.21% | Silicon Valley infrastructure |
| Alameda County | 1.20% | BART and school bonds |
| Contra Costa County | 1.19% | Multiple school districts |
| San Diego County | 1.18% | Some Mello-Roos zones |
| San Francisco County | 1.18% | City + County combined |
| Sacramento County | 1.15% | Capital region bonds |
| Orange County | 1.10% | Lower bond burden |
| San Mateo County | 1.10% | Bay Area, lower bonds |
| Marin County | 1.10% | Lower density, fewer bonds |
Mello-Roos: The Hidden California Property Tax
Mello-Roos Community Facilities Districts (CFDs) are special tax districts that fund infrastructure in newer developments. They were enacted by the 1982 Mello-Roos Act to help builders fund public improvements (schools, parks, sewers) that Prop 13 made impossible to finance through regular property tax.
Where Mello-Roos is Most Common
- Riverside County — Among the heaviest Mello-Roos burden, especially in master-planned communities
- San Bernardino County — Common in newer cities like Eastvale, Chino Hills
- South Orange County — Newer developments in Aliso Viejo, Ladera Ranch, Rancho Mission Viejo
- San Diego County — North County developments (4S Ranch, Carmel Valley, Otay Ranch)
- Sacramento Region — Folsom Ranch, Roseville, Lincoln
How Much Mello-Roos Costs
Mello-Roos can range from $500/year to $5,000+/year depending on the district. They're typically a fixed annual amount (not a percentage of value) and last 25–40 years until bonds are paid off. Always check the property's Mello-Roos status before buying — it's disclosed on the Natural Hazard Disclosure Statement.
Prop 13 Examples: Long-Term Owner vs New Buyer
The biggest impact of Prop 13 is the disparity between long-term owners and new buyers of identical properties:
| Scenario | Assessed Value | Annual Tax |
|---|---|---|
| Bought 1990 for $200K (35 years) | ~$398,000 | ~$4,975 |
| Bought 2005 for $450K (20 years) | ~$668,000 | ~$8,350 |
| Bought 2015 for $700K (10 years) | ~$854,000 | ~$10,675 |
| Bought 2026 for $1,200,000 (new) | $1,200,000 | ~$15,000 |
All four homeowners could own identical homes worth $1.2M today. The 1990 buyer pays $10,000+/year less than the 2026 buyer — a Prop 13 protection worth ~$300,000 over 30 years.
Key California Property Tax Exemptions
Homeowners' Exemption ($7,000)
Reduces assessed value by $7,000 for owner-occupied primary residences. Saves about $70-$100/year. One-time application required with county assessor (Form BOE-266). Many homeowners forget to file this — easy money left on the table.
Disabled Veteran Exemption
Up to $169,769 exemption (2026 amount, indexed annually) for 100% disabled veterans. Up to $254,656 for low-income disabled veterans. Significant tax savings—often eliminates property tax entirely for qualifying veterans.
Senior Property Tax Postponement
California allows seniors (62+) with limited income to postpone property tax payments, with the state placing a lien on the property. Annual interest accrues, but payments are deferred until the property is sold or transferred.
Proposition 19 Inheritance Rules (2021)
Limits parent-child property tax transfers. Inherited primary residence keeps Prop 13 base only if the heir moves in within 1 year. Inherited rental properties get reassessed to market value. This was a major change from previous unlimited parent-child exclusions.
When Your Property Gets Reassessed
Prop 13 protection ends when ownership changes. Reassessment to market value happens upon:
- Sale or transfer to unrelated parties
- New construction or major remodels
- Inheritance to non-children (and to children under Prop 19 if not used as primary residence)
- Transfer to certain LLCs or trusts
- Sale of more than 50% controlling interest in entity holding property
Frequently Asked Questions
Under Proposition 13 (1978), California property tax is 1% of the assessed value, plus voter-approved local bonds and special assessments (typically 0.1%-0.35%). The assessed value is set at the purchase price when you buy and can only increase by 2% per year (or CPI, whichever is lower) until the property is sold. Effective rates for new buyers in 2026 typically range from 1.10% to 1.35%.
Mello-Roos (CFD - Community Facilities Districts) are special tax districts that fund infrastructure (schools, parks, roads, sewers) in newer developments, particularly in Riverside, San Bernardino, and parts of Orange and San Diego counties. These can add 0.50%-1.50% on top of standard property tax, pushing total rates to 2%+ in some new master-planned communities.
Prop 13 caps annual assessed value increases at 2% per year. A homeowner who bought in 1990 for $200,000 has an assessed value of approximately $345,000 today (2% compounded over 35 years), even if the home is now worth $1.2M. This homeowner pays roughly $3,800/year in base tax versus $13,200/year a new buyer of the same home would pay—a $9,400/year savings.
California offers a Homeowners' Exemption that reduces the assessed value of an owner-occupied home by $7,000, saving approximately $70-$100 per year in property tax. The exemption requires a one-time application with your county assessor (Form BOE-266). It's small but cumulative—file once and benefit every year.
Sources & Methodology
- California Constitution Article XIII A — Proposition 13
- California Board of Equalization — Property tax administration guidance
- California Revenue and Taxation Code — Property tax statutes
- County Assessor's Offices — Local rate verification (all 58 counties)
- Mello-Roos Community Facilities Act of 1982 — CFD authority
- Proposition 19 (2021) — Parent-child transfer rules
Calculator methodology and county rates reviewed by Benjamin Thomas, CPA, MST. Rates verified against county assessor publications dated January 2026.