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Ontario, San Bernardino County, California Property Taxes

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Property Taxes in Ontario, California

  • Median Ontario, California effective property tax rate: 1.08%, significantly higher than the national median of 1.02%, and lower than the California state median of 1.21%.

  • Median Ontario, California home value: $372,895

  • Median annual Ontario, California tax bill: $3,927, higher than the national median property tax bill of $2,400.

How are property taxes in San Bernardino calculated?

Property taxes in Ontario, California are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.

Understanding Ontario's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Ontario, knowing local tax details benefits homeowners and investors.

Last Updated April 13, 2026

Ontario, San Bernardino County, California Property Tax Bill Calculator

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

1.08%

Estimate Property Tax Bill

$4,027

$3,737

SAVE WITH OWNWELL

$774

Average Annual Tax Savings

How Does the Ontario Property Tax Calculator Work?

Use this Ontario property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Ontario's median effective tax rate of 1.08% — based on actual property records in San Bernardino County — to generate your estimate.

Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Ontario's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.

Your bill may vary by ZIP code within Ontario: rates range from 1.08% in 91764 to 1.08% in 91710, primarily due to differences in school district levies and local assessment districts.

If your estimate is higher than expected, Ownwell can appeal your Ontario assessment — you only pay if we save you money.

About Ontario Property Taxes

About Property Taxes in Ontario, San Bernardino, California

Ontario’s median effective property tax rate of 1.08% is lower than the California state median of 1.21% and higher than the national median of 1.02%. This rate reflects the San Bernardino County base levy combined with local school district levies and Mello-Roos Community Facility Districts that vary by subdivision throughout the city.

Property tax rates are not uniform across Ontario. Homeowners in ZIP code 91710 carry a median effective rate of 1.10%, while those in 91764 pay 1.07%. This spread reflects how school district boundaries and local assessment districts are drawn across San Bernardino County.

Ontario homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the December 1, 2026 deadline each year.

If your estimated bill seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.

Property Tax Rates Across Ontario, San Bernardino County, California

As noted earlier, local government entities set tax rates, which can vary widely within a state.

Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.

While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.

Below, you can compare Ontario's effective property tax rate to other cities in California and the median property tax rates in California and the U.S.

Property Tax Rates Across Ontario, San Bernardino County, California

Source: Ownwell

1.02%

1.77%

2.51%

Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.

Median Effective Ontario Tax Rate

1.08%

Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.

Median Effective San Bernardino County Tax Rate

1.20%

Median Effective California Tax Rate

1.21%

Median Effective United States Tax Rate

1.02%

Property Tax Rates Across Ontario, San Bernardino County, California

Zip10th Percentile25th PercentileMedian Tax Rate75th Percentile90th Percentile
917101.05%1.08%1.10%1.74%1.79%
917611.01%1.04%1.08%1.28%1.72%
917621.04%1.06%1.08%1.10%1.73%
917641.01%1.04%1.07%1.08%1.08%
91730N/AN/AN/AN/AN/A
91743N/AN/AN/AN/AN/A
91766N/AN/AN/AN/AN/A
91784N/AN/AN/AN/AN/A

Source: Ownwell

Property Tax Assessment Values Across Ontario, San Bernardino County, California

When examining property taxes in Ontario, California, understanding the distinction between "market value" and "assessed value" is crucial.

The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The San Bernardino County assessor estimates the market value for tax purposes.

The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.

Assessment notices:

In San Bernardino County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of October.

Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. Ontario’s median home price is $372,895, with tax bills ranging significantly across the county. Zip code 91710 has the highest median home price at $560,101.

Property Tax Assessment Values Across Ontario, San Bernardino County, California

Source: Ownwell

$15,522

$316,800

$618,078

Median Ontario Market Value

$372,895

Median San Bernardino County Market Value

$304,579

Median California Market Value

$427,605

Median United States Market Value

$235,294

Property Tax Assessment Values Across Ontario, San Bernardino County, California

Zip10th Percentile25th PercentileMedian Home Price75th Percentile90th Percentile
91710$157,108$239,930$560,101$713,200$839,776
91761$140,834$245,832$411,205$580,031$707,472
91762$141,735$225,595$385,968$573,714$714,438
91764$122,847$198,387$306,808$460,820$597,804
91730N/AN/AN/AN/AN/A
91743N/AN/AN/AN/AN/A
91766N/AN/AN/AN/AN/A
91784N/AN/AN/AN/AN/A

Source: Ownwell

Property Tax Bills Across Ontario, San Bernardino County, California

Property tax bills in Ontario are based on the assessed value of a home, not its market price alone, and the local tax rate applied in San Bernardino County. When a home’s assessed value rises, the tax bill can increase as well, which affects monthly housing costs and long-term affordability for homeowners. With a median home price of $372,895, Ontario homeowners may see very different bills depending on location and assessment details. The 25th percentile tax bill is $2,335, while the 75th percentile is $6,340 and the 90th percentile reaches $10,003. The highest median tax bill is $6,276 in 91710, compared with $3,187 in 91764.

Ownwell helps homeowners lower property tax bills by reviewing assessments for errors, identifying opportunities to appeal, and pursuing savings when a home is overassessed. If your tax bill seems too high, Ownwell can help you challenge it and potentially reduce what you pay each year.

Property Tax Bills Across Ontario, San Bernardino County, California

Source: Ownwell

$232

$5,059

$9,885

Median Ontario Tax Bill

$3,927

Median San Bernardino County Tax Bill

$3,680

Median California Tax Bill

$5,134

Median United States Tax Bill

$2,400

Property Tax Bills Across Ontario, San Bernardino County, California

Zip10th Percentile25th PercentileMedian Tax Bill75th Percentile90th Percentile
91710$1,687$2,597$6,276$12,169$13,920
91761$1,452$2,561$4,449$7,279$10,428
91762$1,432$2,358$4,062$7,062$10,940
91764$1,149$2,056$3,187$4,840$6,239
91730N/AN/AN/AN/AN/A
91743N/AN/AN/AN/AN/A
91766N/AN/AN/AN/AN/A
91784N/AN/AN/AN/AN/A

Source: Ownwell

Don't miss the deadline to appeal!

Frequently Asked Property Tax Questions in Ontario, California

How are property taxes calculated in Ontario, California?
Property taxes in Ontario, California are calculated by multiplying your property's assessed value by the applicable tax rate set by local taxing authorities. The assessed value is determined by the county assessor and may differ from your property's market value depending on local assessment ratios and exemptions.
How do I appeal my property taxes in Ontario, California?
To appeal your property taxes in Ontario, California, you typically need to file a formal protest or appeal with your local appraisal district or assessor's office by the stated deadline. You'll need evidence such as comparable sales, a recent independent appraisal, or documentation of property condition issues. Ownwell can handle this entire process for you.
What property tax exemptions are available in Ontario, California?
Common property tax exemptions in Ontario, California include homestead exemptions for primary residences, senior citizen exemptions, veteran exemptions, and disability exemptions. Exemption amounts and eligibility requirements vary by county. Contact your local appraisal district or check Ownwell for details specific to your property.
When are property taxes due in Ontario, California?
Property tax deadlines in Ontario, California vary by county but typically include an assessment notice period in spring or early summer, followed by an appeal deadline, and a tax payment due date in the fall or winter. Check with your county assessor's office for specific dates in your area.
How can Ownwell help reduce my property taxes in Ontario, California?
Ownwell provides professional property tax appeal services in Ontario, California. Our team analyzes your assessment, gathers evidence, files all paperwork, and represents you at hearings — all with no upfront cost. You only pay a percentage of your savings if we successfully lower your tax bill.