How is property tax calculated?

Assessed value × local tax rate (mill rate). Assessed value is often lower than market value — many states assess at 80-90% of market, and some use more complex formulas. The tax rate combines county, city, school district, and special assessments.

Why do property taxes vary so much by state?

States fund schools and local services differently. New Jersey (2.21% effective rate) relies heavily on property tax. Hawaii (0.28%) funds schools more through state income tax. Texas has no income tax but higher property taxes to compensate.

Can I challenge my property tax assessment?

Yes. Most counties have an annual appeal window. Gather comparable properties with lower assessments, document condition issues, and file within the deadline. About 40% of appeals result in some reduction. Worth trying if you think your assessment is 5%+ too high.

Do property taxes increase every year?

Usually yes. Most states allow 2-5% annual increases; California caps them at 2% via Prop 13 until the home sells. Tax rates can also rise if your locality passes new levies. Budget for 3% annual growth as a planning default.

What's a homestead exemption?

A reduction in the taxable value of your primary residence — typically $25K-$75K depending on state, with extra exemptions for seniors, veterans, and disabled. Texas allows $40K homestead + $10K for over-65. Florida $50K. Application required with your county assessor; deadlines are typically March-April. Reapply if you move (it doesn't transfer automatically). Saves $300-1,500/year for most homeowners depending on local rate and exemption size.

Can I deduct property tax on federal taxes?

Yes, but capped at $10,000 combined SALT (State And Local Tax) deduction since the 2017 Tax Cuts and Jobs Act. The cap includes state income tax + property tax combined. High-property-tax-state homeowners (NJ, NY, CA, IL) often max out the cap with state income tax alone, making property tax effectively non-deductible at the federal level. Watch for legislative changes; the SALT cap is politically contested. State property-tax deductions vary by state.

Money & Finance · Free tool

Property Tax Calculator

Estimate your annual and monthly property tax using state effective rates and compare against US benchmarks. Free online calculator, no sign-up required.

Updated June 2026

Home value (assessed)State

Annual property tax

$6,927

Monthly escrow portion

$577.29

% of home value

1.63%

Rank of listed states

#6 of 21

Property tax vs national average

The U.S. average effective property tax rate is about 1.10%. Your selected rate is 0.53 pts above average — roughly $2,252/yr more tax than the typical U.S. home at the same value.

Effective rates are statewide averages — actual bills vary by county, city, and school district. Always confirm with the local assessor’s office.

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What it does

Estimate annual and monthly property tax based on home value and effective tax rate. Tool covers 20+ US states with median effective rates ranging from Hawaii’s 0.28% (the lowest in the nation) to New Jersey’s 2.21% (the highest). On a $400,000 home, that gap is $1,120 vs $8,840 annually — over 7x. Tool also accepts a custom rate so you can plug in your specific local mill rate (state + county + city + school district + special-assessment levies combined).

Property tax ranks among the largest annual home-ownership costs after the mortgage itself. National average effective rate (2025): ~1.10% of market value. Highest-rate states (NJ 2.21%, IL 2.10%, NH 2.03%, VT 1.86%, CT 1.79%) compensate for low or missing income tax. Lowest-rate states (HI 0.28%, AL 0.39%, LA 0.51%, CO 0.52%, DC 0.55%, SC 0.55%) fund local services via different mechanisms. Within a state, rates vary by county and municipality — a Texas home in Houston (Harris County) pays differently from one in Austin (Travis County) even at identical assessed values.

Three caveats most calculators miss: (1) Assessed value vs market value— many counties assess at 80-90% of market or use rolling reassessment; the rate shown applies to assessed value, not market price. (2) Homestead exemptionscan reduce taxable value by $25K-$75K for primary residences (varies by state); some states cap annual assessment increases at 2-3% (California Prop 13, Texas, others) which holds property tax growth below inflation if you stay long-term. (3) Special assessments and bonds add line items that don’t appear in the headline rate — school district bonds, water district fees, MUD (Municipal Utility District) assessments common in Texas suburbs, Mello-Roos in California new construction. Real property tax bills are 5-15% above the calculator estimate in those areas.

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Example input & output

Input

Home value: $425,000
State: Texas (1.63% effective rate)

Output

Annual property tax: ≈ $6,928
Monthly: ≈ $577
vs national average (1.10%): +0.53 points

That $577/month rides on top of principal, interest, and insurance — on this house, Texas property tax alone is the size of a decent car payment. The same house in California (0.71%) runs ≈ $3,018/year.

How to use it

Enter home value (use current market estimate from Zillow / Redfin / appraisal).
Pick state from the list, or pick 'custom rate' to enter your specific local mill rate.
Optional: enter homestead exemption amount if you have one (typical $25K-75K reduction in taxable value for primary residence).
Read annual property tax estimate plus monthly equivalent (most mortgage escrow accounts collect 1/12 monthly).
Compare effective rates across states by re-running with the same home value — useful for relocation planning.
For real budgeting, add 5-15% buffer to account for special assessments, bonds, and MUDs that headline rates don't capture.

How it works

The estimate is home value × effective state rate, divided by 12 for the monthly figure. Effective rates are the statewide average of actual taxes paid ÷ home value — a fairer comparison than nominal mill rates, because states differ in what fraction of market value they assess. Your county’s true rate combines county, city, school district, and special assessments, so pick “custom rate” if you know it.

Common mistakes when using this tool

Treating the state average as your bill. Within-state spread is huge — school districts can double the rate between adjacent towns. The state figure is for comparison and budgeting, not the final number.
Using the assessed value as market value. Many states assess below market; this tool expects current market value with the average effective rate, which already nets that out.
Forgetting exemptions and caps. Homestead exemptions knock $25K-75K off taxable value, and states like California cap annual increases — a long-time owner’s bill can be far below what a new buyer of the same house will pay.

When to use this tool

Pre-purchase planning — total monthly cost (PITI: principal + interest + tax + insurance) needs realistic property tax, not just mortgage payment.
Relocation planning — comparing total housing cost across states; a state with no income tax but 2% property tax may be more expensive than the reverse.
Mortgage escrow planning — ensuring monthly escrow payment covers actual annual tax bill (under-collection causes shortage payments later).
Considering whether to challenge an assessment — knowing your effective rate vs neighbors' helps identify over-assessment.

When not to use it

Investment property tax planning — different deduction rules and depreciation considerations apply; consult a CPA.
Properties with significant unique characteristics (working farms, historic landmarks, mixed-use) — those have non-standard assessment methods.
International properties — completely different tax structures (UK Council Tax, German Grundsteuer) not covered by US-state-rate tables.
Properties in states/areas with rapidly changing rates due to recent legislation — always cross-check with the county assessor's office for current rate.

Common use cases

Homebuyer adding realistic property tax to the PITI math before making an offer.
Relocation shopping: same $425K house, Texas vs Florida vs California tax bills side by side.
Checking whether your escrow payment will cover the actual annual bill.
Owner deciding if the assessment looks high enough to be worth an appeal.

Frequently asked questions

How is property tax calculated?: Assessed value × local tax rate (mill rate). Assessed value is often lower than market value — many states assess at 80-90% of market, and some use more complex formulas. The tax rate combines county, city, school district, and special assessments.
Why do property taxes vary so much by state?: States fund schools and local services differently. New Jersey (2.21% effective rate) relies heavily on property tax. Hawaii (0.28%) funds schools more through state income tax. Texas has no income tax but higher property taxes to compensate.
Can I challenge my property tax assessment?: Yes. Most counties have an annual appeal window. Gather comparable properties with lower assessments, document condition issues, and file within the deadline. About 40% of appeals result in some reduction. Worth trying if you think your assessment is 5%+ too high.
Do property taxes increase every year?: Usually yes. Most states allow 2-5% annual increases; California caps them at 2% via Prop 13 until the home sells. Tax rates can also rise if your locality passes new levies. Budget for 3% annual growth as a planning default.
What's a homestead exemption?: A reduction in the taxable value of your primary residence — typically $25K-$75K depending on state, with extra exemptions for seniors, veterans, and disabled. Texas allows $40K homestead + $10K for over-65. Florida $50K. Application required with your county assessor; deadlines are typically March-April. Reapply if you move (it doesn't transfer automatically). Saves $300-1,500/year for most homeowners depending on local rate and exemption size.
Can I deduct property tax on federal taxes?: Yes, but capped at $10,000 combined SALT (State And Local Tax) deduction since the 2017 Tax Cuts and Jobs Act. The cap includes state income tax + property tax combined. High-property-tax-state homeowners (NJ, NY, CA, IL) often max out the cap with state income tax alone, making property tax effectively non-deductible at the federal level. Watch for legislative changes; the SALT cap is politically contested. State property-tax deductions vary by state.

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