Alameda County Property Tax 2026: Rates, Assessment, and How to Pay
A CPA-reviewed guide by Rachel Mitchell, CPA — updated for 2026 tax year
Complete Alameda County property tax guide 2026. Rates by city, payment schedule, exemptions, how to appeal assessments, and OBBBA SALT cap impact.
Alameda County — home to Oakland, Fremont, and Berkeley — has some of the highest property values in California. With high values come high property taxes. If you own a home in Alameda County, understanding how your property tax is calculated, when it's due, and how to pay can save you thousands of dollars and prevent costly penalties.
This guide covers everything you need to know about Alameda County property tax in 2026.
Alameda County Property Tax Rate
The average effective property tax rate in Alameda County is approximately 0.79% of assessed value. However, the actual rate you pay depends on your specific city, school district, and special assessments.
How Alameda County Property Tax Is Calculated
Under Proposition 13 (1978), California property tax is based on the assessed value of your home, not the market value. The assessed value:
- Is set at the purchase price when you buy the home
- Can increase by a maximum of 2% per year (inflation adjustment)
- Resets to market value when the property is sold
Base property tax rate: 1% of assessed value (statewide, per Prop 13)
Additional assessments: Voters in Alameda County have approved various bond measures and special assessments, which add 0.15%–0.30% on top of the base rate.
Total Effective Tax Rate by City
| City | Approx. Total Rate |
|---|---|
| Oakland | 1.05%–1.25% |
| Fremont | 0.95%–1.10% |
| Berkeley | 1.10%–1.30% |
| Hayward | 1.00%–1.15% |
| Pleasanton | 0.85%–0.95% |
| Livermore | 0.85%–0.95% |
| Dublin | 0.90%–1.00% |
| San Leandro | 1.00%–1.15% |
| Union City | 0.95%–1.10% |
| Newark | 0.95%–1.05% |
Use our property tax calculator to estimate your annual property tax.
Example: Property Tax on a $900,000 Home in Oakland
Let's say you bought a home in Oakland for $900,000:
- Assessed value (year 1): $900,000
- Base tax (1%): $9,000
- Additional assessments (~0.20%): $1,800
- Total annual property tax: $10,800
After 5 years (with 2% annual assessment increase):
- Assessed value: $993,653
- Total property tax: ~$11,924
Note: Market value may be $1.1M+ after 5 years, but assessed value is capped at $993,653 thanks to Prop 13.
Alameda County Property Tax Payment Schedule
Property taxes in Alameda County are billed annually and paid in two installments:
| Installment | Covers Period | Due Date | Delinquent After |
|---|---|---|---|
| 1st Installment | July 1 – December 31 | November 1 | December 10 (10% penalty) |
| 2nd Installment | January 1 – June 30 | February 1 | April 10 (10% penalty + $20 fee) |
Late Payment Penalties
- 1st installment late (after Dec 10): 10% penalty
- 2nd installment late (after Apr 10): 10% penalty + $20 administrative fee
- Both installments unpaid by June 30: Property becomes tax-defaulted and a 1.5% monthly penalty (18% annual) is added
- After 5 years of default: Property may be sold at tax sale
How to Pay Alameda County Property Tax
1. Online Payment
Visit the Alameda County Tax Collector website: actc.mytaxbill.org
- Pay by eCheck (free)
- Pay by credit/debit card (2.35% fee, minimum $2.50)
2. By Mail
Send check or money order to:
Alameda County Tax Collector
PO Box 5009
Hayward, CA 94540Include your parcel number and installment number on the check.
3. In Person
Visit the Tax Collector's office:
- 1221 Oak Street, Room 131, Oakland, CA 94612
- Monday–Friday, 8:30 AM – 4:30 PM
4. By Phone
Call 510-272-6800 to pay by credit/debit card.
Alameda County Property Tax Exemptions
Several exemptions can reduce your property tax bill:
Homeowners' Exemption (Prop 13)
- Amount: $7,000 off assessed value (saves ~$70/year)
- Eligibility: Property is your principal residence
- How to apply: File form BOE-266 with the Alameda County Assessor
Senior Exemption (Prop 60/90)
- Benefit: Transfer your current assessed value to a new home (within Alameda County)
- Eligibility: Age 55+, moving within the county
- How to apply: File with the Assessor's Office within 3 years of purchase
Disabled Veterans' Exemption
- Amount: Up to $169,004 off assessed value (2026, basic) or $427,834 (low-income)
- Eligibility: Disabled veterans or surviving spouses
- How to apply: File form BOE-261-G
Other Exemptions
- Religious/Charitable: Properties owned by qualifying nonprofits
- Institutional: Schools, hospitals, libraries
- Welfare: Low-income housing properties
How to Appeal Your Alameda County Property Tax Assessment
If you believe your assessed value is too high, you can file an appeal with the Alameda County Assessment Appeals Board.
Filing Window
- Regular appeals: July 2 – September 15 (for the current tax year)
- Supplemental appeals: Within 60 days of the notice date
Steps
- Review your assessment notice (mailed in July)
- Gather evidence: Comparable sales, appraisal, photos of damage
- File Application for Changed Assessment (form AAB-1)
- Pay filing fee: $30–$50 (refundable if you win)
- Attend hearing: Present your case to the Appeals Board
- Receive decision: Typically within 60–90 days
Success Rate
Approximately 40–60% of property tax appeals in Alameda County result in some reduction. Homeowners who present comparable sales data have the highest success rate.
Alameda County Property Tax and the OBBBA SALT Cap
The One Big Beautiful Bill Act raised the SALT deduction cap from $10,000 to $40,400 for 2026. This is significant for Alameda County homeowners:
| Scenario | SALT Deduction (Old $10K Cap) | SALT Deduction (New $40.4K Cap) |
|---|---|---|
| Property tax $12K + State income tax $15K | $10,000 (capped) | $27,000 (full) |
| Property tax $18K + State income tax $25K | $10,000 (capped) | $40,400 (capped) |
| Property tax $10K + State income tax $8K | $10,000 (capped) | $18,000 (full) |
If you itemize deductions (rather than taking the standard deduction), the increased SALT cap could save you $2,000–$5,000 in federal income tax. Use our OBBBA tax calculator to see your specific savings.
Alameda County Property Tax Revenue Use
Your property tax dollars are distributed among several entities:
| Entity | Share |
|---|---|
| K-12 Schools | ~52% |
| Community Colleges | ~5% |
| Cities | ~11% |
| County | ~12% |
| Special Districts | ~10% |
| Redevelopment | ~10% |
Property Tax Assistance Programs
Property Tax Postponement (Senior/Disabled)
Low-income seniors (62+) and disabled homeowners can postpone property tax payments as a lien on the property.
- Eligibility: Age 62+ or disabled, income ≤ $49,017 (2026), at least 40% equity
- Repayment: When property is sold, transferred, or refinanced
- Apply: California State Controller's Office (sco.ca.gov)
Gentry Homeowner and Renter Assistance
This California program provided direct cash assistance to low-income seniors and disabled individuals. Note: The program was suspended in 2016 and has not been reinstated as of 2026.
Frequently Asked Questions
How do I find my Alameda County property tax bill? Visit actc.mytaxbill.org and search by parcel number or property address. You can view and download your current and past tax bills.
What happens if I don't pay my property tax? After 5 years of unpaid taxes, your property can be sold at a public auction. Before that, penalties and interest accumulate at 18% annually.
Can I pay property tax with a credit card? Yes, through the Alameda County Tax Collector website. The fee is 2.35% of the payment amount.
Is my property tax deductible on federal taxes? Yes, if you itemize deductions. Property tax is part of the SALT deduction (capped at $40,400 for 2026 under OBBBA).
How often is my property reassessed? Your assessed value increases by a maximum of 2% per year under Prop 13. It resets to market value only when the property is sold, improved, or changes ownership.
Related Resources
- Property Tax Calculator — Estimate your property tax
- OBBBA Tax Calculator — SALT cap impact
- California Tax Calculator — CA income tax
- Tax Refund Calculator — Estimate your refund
Sources
- Alameda County Tax Collector — Property Tax Information
- California State Board of Equalization — Proposition 13
- Alameda County Assessor's Office — Assessment Appeals
- IRS — Publication 530 (Tax Information for Homeowners)
- One Big Beautiful Bill Act (P.L. 119-1) — SALT Cap Provisions
