Online Tool Store
Property Tax Calculator
Estimate annual and monthly property tax from assessed value, exemptions, and a percentage or millage rate, privately in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Example shown - use the assessed value and official rate from your local tax authority.
Estimate only. Actual bills can include local levies, special assessments, caps, and exemptions not represented here.
How it works
- Enter the assessed value from the property assessment notice.
- Subtract any value-based exemptions and enter the official percentage or millage rate.
- Review estimated taxable value, annual tax, and the monthly equivalent.
The formula
taxable value = max(assessed value - exemptions, 0)
annual tax = taxable value x rate
For a percentage rate, divide the entered rate by 100. For mills, divide by 1,000. The loaded example gives (350,000 - 50,000) x 1.2% = 3,600 per year.
FAQ
Is assessed value the same as market value?
Not always. A local tax authority may assess only a percentage of market value or use its own valuation date. Use the assessed value shown on your official notice.
What is a millage rate?
One mill is one unit of tax per 1,000 units of taxable value. A 12-mill rate is therefore the same basic rate as 1.2%.
What should I enter as an exemption?
Enter the total reduction that applies directly to taxable assessed value, such as a homestead exemption. Do not enter a tax credit that is subtracted after tax is calculated.
Will this match my final property tax bill?
It is a basic estimate. Special assessments, multiple taxing districts, caps, credits, and local rounding rules can change the official bill.
How we compare
| Feature | Online Tool Store | Local tax portal | Spreadsheet |
|---|---|---|---|
| Quick what-if estimates | Yes | Varies by authority | Yes, after setup |
| Percent and mill rates | Both included | Uses local format | Needs a formula |
| Official bill amount | Estimate only | Yes | Estimate only |
| No account | Yes | Varies | Depends on software |
Use Property Tax Calculator for fast scenarios and budgeting, then confirm the final figure with the official assessment and tax portal for the property's jurisdiction.