A couple finds a 10-acre parcel listed at $85,000 and budgets $300 a month for taxes based on a neighbor’s guess. After closing they discover the county mill rate is 28 mills, the assessed value is 85% of market, and there is a school-district special assessment on top. The real bill comes to $480 a month. Running the numbers here first—assessed value, mill rate, exemptions, and caps—would have shown that gap before they signed.
What the Estimate Gives You
- Annual tax based on assessed value times the total mill rate, minus any exemptions (homestead, senior, veteran, agricultural).
- Monthly breakdown so you can compare the figure against escrow or a standalone payment schedule.
- Cap effects. States like California (Prop 13), Florida (Save Our Homes), and Texas (homestead cap) limit how fast assessed value can rise year over year. The tool shows what happens with and without the cap so you can see the long-term difference.
- Special assessments. Sewer districts, school bonds, fire levies—these add flat or per-acre charges on top of the ad valorem tax. Enter each one separately to see the full picture.
Assumptions and Reality Checks
- Assessed value is not market value. Most counties assess at a fraction of market—sometimes 40%, sometimes 100%. Check your county assessor’s ratio before entering a number.
- Mill rates change. A mill rate is set annually by the taxing authority. The estimate uses the rate you enter; it does not predict next year’s rate.
- Exemption eligibility varies. A homestead exemption requires owner occupancy in most states. If you plan to hold the land vacant, that exemption does not apply.
- This is not a tax bill. The output is a planning estimate. Your county’s actual bill may include fees, delinquency adjustments, or rounding rules this tool does not model.
Worth Checking Next
Once you have a tax estimate, see how it fits into a full purchase cost with the land purchase cost calculator. Map prices across a county with the land price heatmap to find where taxes eat less of the margin. Sketch the parcel shape from the deed description. Or generate a summary PDF that bundles conversions, tax projections, and parcel facts into one document.
Last updated: January 2026