Use this when comparing homes, checking an escrow payment, or stress-testing what happens if the property is reassessed after purchase. Local assessor rules and the official tax bill control the actual tax.
Property Tax Inputs
Use the current tax roll or seller bill if known.
100% means assessed value equals market value.
Optional, used for reassessment shock.
Estimated Property Tax
$0
Calculation Breakdown
| Item | Amount | What it means |
|---|
Assessment Growth Projection
This projection compounds taxable assessed value at your growth rate and keeps the tax rate, exemptions, and special assessments unchanged.
| Year | Taxable assessed value | Annual tax | Monthly escrow | Change from year 1 |
|---|
Methodology
The calculator estimates reassessed value as home value multiplied by the assessed value ratio. Taxable assessed value equals reassessed value minus exemptions, floored at zero. Annual base tax equals taxable assessed value multiplied by the tax rate. Special assessments or parcel taxes are then added.
When millage mode is selected, the millage rate is converted to a percent rate by dividing mills by 10. For example, 13.5 mills equals 1.35% of taxable assessed value.
Exemption savings equals the lesser of exemptions and reassessed value multiplied by the tax rate. Payment shock compares the estimated annual tax with the current annual tax bill you entered.
Important caveats
- Local assessor rules control assessed value, taxable value, assessment caps, appeal deadlines, exemption eligibility, tax districts, and bill timing.
- Homestead, senior, veteran, disability, agricultural, primary-residence, and other exemptions may require applications and may not transfer automatically after purchase.
- Some areas reassess after purchase, issue supplemental bills, phase in assessment changes, or remove prior-owner caps and exemptions.
- Special assessments, Mello-Roos/community facility districts, school levies, parcel taxes, bond measures, and municipal fees may not behave like a simple rate.
- Escrow estimates can lag tax changes. A higher official bill can create an escrow shortage and raise the servicer's monthly collection later.
- This calculator is an educational estimate. The county assessor, tax collector, lender escrow analysis, and official tax bill control.
Related calculators
Frequently asked questions
How do I estimate my annual property tax?
Start with taxable assessed value, multiply by the local tax rate, then add special assessments or parcel taxes. Use your county assessor and tax collector records for the official method.
What is the difference between assessed value and taxable value?
Assessed value is the value assigned by the assessor. Taxable value is the portion actually taxed after exemptions, caps, classified-use rules, or local deductions.
Why is the seller's tax bill lower than my estimate?
The seller may have long-held assessment caps, exemptions, or a lower assessed value. A sale can trigger reassessment, remove exemptions, or create supplemental tax bills for the buyer.
Can I appeal my property tax assessment?
Often, yes, but appeal windows, evidence rules, and filing processes are local. Check the assessor's notice, comparable sales rules, exemption forms, and deadline before relying on an appeal.