Marin County property tax calculator 2026
This Marin County property tax calculator provides an estimate of annual property taxes based on assessed value and a combined property tax rate. Property taxes in Marin County follow California’s statewide framework and vary by parcel and tax rate area.
Estimates only. Results may differ from official tax bills, pay stubs, or filed returns.
Many U.S. counties use multiple local taxing authorities (county, city, school district, special districts). Enter your combined local millage rate as shown on your annual property tax notice.
Estimated property tax
See our research on states with the highest property taxes
Enter the assessed value to see the estimated annual property tax.
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How it works
Property taxes in Marin County are calculated using the assessed value established under California’s acquisition-value system. A statewide base rate applies, with additional voter-approved debt rates determined by the specific tax rate area that applies to the parcel. The calculator estimates tax by applying a single combined rate to the assessed value.
Examples
When a property in Marin County changes ownership, a new base year value is established for assessment purposes. If that base value is 810,000, the constitutional 1 percent levy would generate 8,100 before any locally approved bonded indebtedness is included. Annual increases are generally limited by statute until another reassessment event occurs.
Limitations and important notes
This calculator provides an estimate only. Property tax outcomes in Marin County vary by tax rate area, voter-approved debt, and parcel-specific charges. Direct assessments and exemptions are not fully reflected, and the actual tax bill may differ from the estimate.
FAQs
Is this an official Marin County property tax bill?
No. This tool provides an estimated property tax and does not represent an official tax bill.
Why do property tax rates differ within Marin County?
Rates vary because properties fall into different tax rate areas with different combinations of local taxing jurisdictions and voter-approved debt.
Does this calculator apply Proposition 13 limits?
The calculator assumes the assessed value already reflects the applicable assessment rules and does not independently apply assessment caps.
Can my actual property tax be higher or lower than the estimate?
Yes. Actual taxes depend on the official assessed value, applicable tax rate area, and parcel-specific charges.
Calculations are simplified and for guidance only. Always double-check results and current rules with official sources or a qualified professional before making financial decisions.