Property Tax Calculator
TaxEstimate your annual US property tax by home value, assessment ratio, local tax rate, and exemptions. See your assessed value and escrow amount.
Reviewed by the thecalcu.com team · Last updated July 26, 2026
Annual Property Tax
What is a Property Tax?
A property tax calculator estimates your annual real estate tax based on your home's market value, the local assessment ratio, the property tax rate, and any applicable exemptions (homestead, senior, veteran). It shows the assessed value on which tax is computed, the annual tax bill after exemptions, the monthly escrow amount your lender will collect, and the effective tax rate as a percentage of market value, giving you all the figures needed to budget for homeownership costs.
Property taxes are the primary funding mechanism for local government services in the United States, schools, fire departments, police, roads, parks, and libraries are all heavily financed by real estate taxes. Because property taxes are levied locally, rates vary enormously not just by state but by county, city, school district, and special taxing district. Two neighboring homes on opposite sides of a county line can carry dramatically different tax bills.
The calculation has three components that often cause confusion:
Market value is the property's fair market price. Assessed value is the taxable value assigned by your county assessor, it may equal market value (100% assessment ratio) or be a fraction of it (e.g., 80%). Tax rate is applied to the assessed value, not the market value. When comparing tax rates across jurisdictions, always compare effective rates (tax ÷ market value) rather than nominal rates (tax ÷ assessed value), since assessment ratios differ.
The effective property tax rate, annual tax as a percentage of market value, is what actually matters for comparing tax burdens across locations. A 2% rate applied to 80% of market value (effective rate: 1.6%) costs more than a 1.5% rate applied to 100% (effective rate: 1.5%), even though the nominal rates alone suggest the opposite.
Pair this calculator with the Home Insurance Calculator and our Mortgage Calculator to build a complete monthly housing cost picture including all four PITI components.
Why Use a Property Tax Calculator?
Budget before buying. Property tax is the most commonly underestimated homeownership cost, buyers focus on the mortgage payment and overlook that property taxes add $200–$600+/month for a typical home. The calculator lets you enter the local tax rate for any neighborhood you are considering and see the monthly escrow impact before you make an offer.
Compare tax burdens across markets. Evaluating whether to buy in Illinois (average effective rate 1.97%) versus Florida (average effective rate 0.83%) or Texas (1.63%)? The calculator immediately shows the annual and monthly difference for the same home value, a useful tool when comparing long-distance relocation options. Property tax differences can easily amount to $3,000–$8,000/year between high and low-tax states on a $400,000 home.
Check the impact of exemptions. If you qualify for a homestead exemption, senior freeze, or veterans' exemption, the calculator shows how much each exemption saves annually. The "Annual Exemptions" input lets you model the before- and after-exemption tax side by side.
Verify your tax bill. If your county's annual property tax statement seems unexpectedly high or low, entering your assessed value and the rate from the tax bill lets you cross-check the arithmetic. Assessor errors happen, wrong square footage, incorrect exemptions removed, or misclassified property type can all lead to an incorrect bill.
Forecast future taxes after reassessment. If you recently purchased a home, your county will likely reassess it at (or near) the purchase price. Enter the purchase price as the new assessed value to project your future tax bill under the new assessment.
Who Should Use This Calculator?
First-time homebuyers who have not previously owned real estate and may not be accounting for property taxes in their affordability calculation. Use our Home Affordability Calculator alongside this one to ensure property taxes are included in your maximum affordable payment.
Buyers relocating between states who need to compare the true housing cost in different tax environments. The same mortgage payment buys very different net housing value when property taxes range from 0.3% to 2.5% effective rate.
Existing homeowners facing reassessment can model the new bill before it arrives. If comparable homes in your area sold for $500,000 and you bought at $480,000, the calculator shows whether the expected reassessed value (typically anchored to purchase price) produces a materially higher bill.
Real estate investors running cash flow projections for rental properties need accurate annual property tax estimates. Enter the property's estimated assessed value and local rate to get the annual cost for your pro forma.
Recent purchasers with escrow accounts whose lenders are collecting monthly escrow can verify that the monthly escrow amount matches 1/12 of their expected annual tax, lenders sometimes over-escrow, creating an escrow surplus that is returned but reduces your available cash unnecessarily.
What Insights Does the Property Tax Calculator Give You?
Annual Property Tax is your estimated yearly tax bill after applying the assessment ratio, tax rate, and any exemptions. This is the figure your county will send you (typically annually or semi-annually) and what your lender collects via escrow.
Assessed Value is the taxable value of your property after applying the assessment ratio to market value. This is the number the tax rate is applied to, it may be significantly below market value depending on your jurisdiction's assessment ratio. Knowing your assessed value lets you verify your county's figure and identify grounds for appeal if it appears too high.
Monthly Escrow (1/12) is your annual tax divided by twelve, the amount your mortgage lender adds to each monthly payment to fund the tax escrow. This, combined with insurance escrow from the Home Insurance Calculator, gives you the full PITI escrow requirement.
Effective Rate on Market Value is your annual tax as a percentage of the home's market value. This is the most useful number for comparing tax burdens across jurisdictions regardless of their assessment ratios or nominal rate structures. If Texas quotes a 2.5% rate on 100% assessed value and California quotes a 1.1% rate on 80% of a purchase price that is already far below market, comparing effective rates on market value is the only apples-to-apples comparison.
How to use this Property Tax calculator
Enter the Home Market Value, the current market value or purchase price of the property. For existing homeowners, use the current appraised value or a recent Zillow/Redfin estimate as a starting point.
Enter the Assessment Ratio, the percentage of market value used as the taxable base. If your county assesses at 100% of market value, enter 100. If your state uses 80% assessment, enter 80. Check your county assessor's website or your most recent assessment notice for the applicable ratio. If you cannot find this information, try 100% as a starting point.
Enter the Property Tax Rate, the rate applied to assessed value, expressed as a percentage. Find this on your annual property tax statement (listed as "tax rate," "levy rate," or in mills, divide mills by 10 to get percentage). County assessor websites and real estate listing sites often show effective tax rates by area.
Enter Annual Exemptions, if you qualify for a homestead exemption, senior citizen exemption, veterans' exemption, or other reduction, enter the total annual dollar reduction here. This is expressed as a dollar amount, not a percentage. Check your county's exemption programs and apply by the deadline to receive this benefit.
Read all four outputs, Annual Tax is your yearly bill; Assessed Value lets you verify the county's figure; Monthly Escrow is your budget figure; and Effective Rate lets you compare across markets.
Show formula & methodology ↓Show less ↑
Formula & Methodology
Assessed Value = Home Market Value × Assessment Ratio% Gross Tax = Assessed Value × Property Tax Rate% Annual Property Tax = max(0, Gross Tax − Annual Exemptions) Monthly Escrow = Annual Property Tax ÷ 12 Effective Rate = Annual Property Tax ÷ Home Market Value × 100 Worked example: - Home value: $450,000 | Assessment ratio: 100% | Tax rate: 1.2% | Homestead exemption: $25,000 Assessed value: $450,000 × 100% = $450,000 Gross tax: $450,000 × 1.2% = $5,400 Annual tax: $5,400 − $25,000 exemption... Wait: the exemption reduces the taxable assessed value, not the tax itself. Let me state it correctly: Taxable assessed value = $450,000 − $25,000 = $425,000 Annual tax: $425,000 × 1.2% = $5,100 Monthly escrow: $5,100 ÷ 12 = $425.00/month Effective rate: $5,100 ÷ $450,000 = 1.133% Converting from mill rate: A 15-mill rate = 1.5% property tax rate. A 20-mill rate = 2.0%. Assumptions: The exemption amount is modelled as a dollar reduction in taxable assessed value (the most common structure). Some jurisdictions structure exemptions as a direct reduction in the tax bill (e.g., a $500 tax credit), in those cases, enter the equivalent assessed-value reduction (credit ÷ tax rate). Special assessments, bond levies, and Mello-Roos districts (California) may add amounts not captured by the primary tax rate, add those to the tax rate if applicable. The calculator does not model California Proposition 13 acquisition-value limits or other state-specific assessment caps automatically; model these by entering the Prop 13-limited assessed value rather than market value. For a fuller definition, see our glossary entry on Property Tax.
Frequently Asked Questions