Estimate Your Annual Property Tax
Use this realty tax calculator to quickly estimate your annual and monthly property tax bill based on assessed value, millage rate, and exemptions.
How this realty tax calculator works
Property tax is usually based on your home's assessed value, local tax rate, and any exemptions that reduce the taxable amount. This calculator follows a common approach used in many counties and municipalities.
Assessed Value = Market Value × (Assessment Ratio ÷ 100)
Taxable Value = Assessed Value − Exemptions
Base Tax = Taxable Value × (Millage Rate ÷ 1000)
Total Annual Tax = Base Tax + Special Assessments
Step-by-step guide to calculating realty tax
1) Find your market value
This is often your most recent purchase price, appraisal estimate, or county estimate of fair market value.
2) Confirm local assessment ratio
Not all jurisdictions assess at full market value. Some use 80%, 50%, or other ratios.
3) Get your millage rate
Millage rates can include city, county, school district, and special district components. Use the total combined millage for a better estimate.
4) Subtract exemptions
Common examples include homestead exemptions, senior exemptions, veteran exemptions, and disability exemptions.
5) Add annual fees
Some bills include fixed annual charges like lighting, drainage, solid waste, or local service fees.
Example property tax estimate
Suppose a home has:
- Market value: $350,000
- Assessment ratio: 100%
- Millage rate: 24.5 mills
- Exemptions: $50,000
- Special assessments: $300
The taxable value is $300,000. Base tax is $7,350. After adding $300 in fees, total annual property tax is $7,650, or $637.50/month.
Ways to potentially lower your property tax bill
- Apply for all available exemptions as early as possible.
- Review your assessment notice for errors (square footage, lot size, condition).
- Compare nearby properties to see if your assessment appears too high.
- File an appeal during the official protest period if warranted.
- Track changes in local millage rates before annual budgeting.
Important notes
For official numbers, verify details with your county tax assessor, tax collector, or municipal finance office.