Property Tax Calculator

Calculate annual property taxes based on your home value, local tax rates, and available exemptions. Get accurate estimates for monthly escrow payments and effective tax rates.

What Is a Property Tax Calculator?

A property tax calculator estimates your annual and monthly property tax based on your home's market value, the local assessment ratio, tax rate, and any applicable exemptions. Property taxes are a significant ongoing cost of homeownership and vary dramatically by location.

How the Math Works

Assessed Value = Market Value x Assessment Ratio

Taxable Value = Assessed Value - Exemptions

Annual Tax = Taxable Value x Tax Rate

How to Use This Calculator

Enter your home's market value (what it would sell for today).
Set the property tax rate for your county or municipality.
Enter the assessment ratio (100% if assessed at full market value).
Add any exemptions you qualify for.
Review the annual and monthly tax along with the detailed breakdown.

Worked Examples

Example 1: Standard Calculation

Home value $400,000, tax rate 1.25%, 100% assessment, no exemptions. Annual tax: $5,000. Monthly: $417.

Example 2: With Homestead Exemption

Home value $350,000, tax rate 1.5%, 100% assessment, $50,000 homestead exemption. Taxable value: $300,000. Annual tax: $4,500. Monthly: $375.

Example 3: Partial Assessment Ratio

Home value $500,000, tax rate 2.0%, 60% assessment ratio. Assessed value: $300,000. Annual tax: $6,000. Monthly: $500.

Common Use Cases

Home buying budgeting: Include property tax in your total monthly housing cost estimate.
Location comparison: Compare tax costs between different neighborhoods or counties.
Appeal preparation: Calculate what your tax should be based on a corrected value.
Budget planning: Anticipate annual tax increases as property values rise.

Tips and Common Mistakes

Tax rates change annually. Your rate may increase even if your assessed value stays the same. Check your latest tax bill for the current rate.

Budget for escrow shortages. If taxes increase, your lender will adjust your escrow payment, raising your monthly mortgage bill. Plan for this annual adjustment.

Take advantage of all exemptions. Many homeowners miss eligible exemptions. Contact your county assessor to confirm all available exemptions for your situation.

Frequently Asked Questions

How is property tax calculated?

Property tax is calculated by multiplying your home's assessed value by the local tax rate. The assessed value may differ from market value depending on your county's assessment ratio. Exemptions (homestead, senior, veteran) reduce the taxable value before the rate is applied. For example, a $400,000 home assessed at 100% with a 1.25% rate pays $5,000 annually.

What is an assessment ratio?

The assessment ratio is the percentage of market value used for tax calculations. Some jurisdictions assess at 100% of market value while others use a fraction. A home worth $400,000 with a 60% assessment ratio has an assessed value of $240,000. The tax rate then applies to this lower assessed value. Check your county assessor's office for local ratios.

What property tax exemptions are available?

Common exemptions include homestead exemptions (for primary residences), senior citizen exemptions (age 65+), veteran and disability exemptions, and agricultural exemptions. Amounts vary widely by state and county. A homestead exemption might reduce taxable value by $25,000 to $50,000. Apply through your county assessor's office.

How often are property values reassessed?

Reassessment frequency varies by jurisdiction. Some counties reassess annually while others do so every 3 to 5 years. Some states like California limit annual increases to 2% under Proposition 13 until the property sells. Reassessment can significantly change your tax bill, especially in rapidly appreciating markets.

Can I appeal my property tax assessment?

Yes, you can appeal if you believe your assessed value is too high. Gather evidence including recent comparable sales, independent appraisals, and documentation of property issues. File an appeal with your county assessment board by the deadline, typically within 30-90 days of receiving your assessment notice. Many appeals result in reduced assessments.

What is a mill rate?

A mill rate is an alternative way to express property tax rates where one mill equals one-tenth of a penny, or $1 per $1,000 of assessed value. A tax rate of 1.25% equals 12.5 mills. Mill rates are commonly used in some states and make it easy to calculate tax per thousand dollars of property value.