California Property Tax Estimator
Use this calculator to estimate annual and monthly property tax in California using assessed value, local rates, and special assessments.
Estimate only. Actual tax bills vary by county, voter-approved debt, Mello-Roos, and exemptions.
How California Property Tax Works
California property taxes are based primarily on a home's assessed value, not necessarily its current market value. Under Proposition 13, the base tax rate is generally 1% of assessed value, and annual increases in assessed value are typically capped unless there is a change in ownership or new construction.
Most homeowners also pay additional local charges. These can include voter-approved bonds, parcel taxes, school district assessments, and other line-item fees that vary by location.
What This Calculator Includes
- Assessed value input: Use your current assessed value if you already know it.
- Purchase-price fallback: If you do not know assessed value, the calculator can estimate it from purchase price and annual growth.
- Base + local rate: Combine the 1% baseline with local percentage charges.
- Special assessments: Add fixed annual costs that do not depend on value.
- Homeowner exemption: Optionally subtract a taxable-value exemption (commonly $7,000).
Step-by-Step: Using the Calculator
1) Enter your assessed value (or purchase details)
If your county tax bill already lists assessed value, enter that directly. If not, enter original purchase price and years owned to generate an estimate.
2) Confirm tax rates
Base rate is usually 1.00%. Add local rate for bonds and similar percentage-based charges. If unsure, start with 0.25% and refine later based on your county bill.
3) Add fixed assessments
Some costs are flat annual charges rather than percentages. Enter those in the special assessments field.
4) Apply homeowner exemption
If the property is your primary residence and qualifies, leave the exemption box checked.
5) Review annual and monthly totals
The result gives you an annual estimate, monthly estimate, and effective tax rate based on assessed value.
Example Scenario
Suppose you have an assessed value of $700,000, base tax rate of 1.00%, local rate of 0.22%, and $450 in fixed assessments. With a $7,000 homeowner exemption, your estimated annual tax would be close to:
- Taxable value: $693,000
- Ad valorem tax: $8,454.60
- Plus fixed assessments: $450
- Total annual estimate: $8,904.60
Important Notes for California Homeowners
- Tax bills can include district-level line items not captured by a simple percentage.
- New construction and ownership changes may trigger reassessment.
- Supplemental tax bills can occur after purchase.
- Always compare estimates with your county assessor and actual bill.
Frequently Asked Questions
Is California property tax always 1%?
The base is generally 1%, but total tax is often higher after local voter-approved debt and assessments are added.
Does this calculator replace my official tax bill?
No. This tool is for planning and budgeting. Your county tax collector's bill is the official amount.
Can I use market value instead of assessed value?
You can, but results may be less accurate. California tax is tied to assessed value rules, not just today's listing price.