realty tax calculator

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.

Many areas assess at less than 100% of market value (for example, 80%).
1 mill = $1 tax per $1,000 of taxable assessed value.
Enter your values and click "Calculate Realty Tax" to see your estimate.

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.

Formula:
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

This calculator provides an estimate only. Actual tax bills can include jurisdiction-specific rules, caps, rollback rates, bond levies, agricultural classifications, and timing adjustments that are not captured here.

For official numbers, verify details with your county tax assessor, tax collector, or municipal finance office.

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