Free, instant calculators and state-by-state guides to help you estimate property tax, homestead savings, monthly escrow, capital gains, and refinance impacts.
Property tax is the largest single source of revenue for local governments in the United States, funding schools, police and fire services, road maintenance, libraries, and parks. If you own a home, you will almost certainly pay it — and the bill can range from a few hundred dollars a year in low-rate states to well over $10,000 in high-rate areas. This guide explains what property tax is, how it is calculated, how to lower it, and how our calculators help you estimate your own bill before you buy, sell, or refinance.
Property tax is an ad valorem tax — a tax based on the value of what you own. Local governments (counties, cities, townships, school districts, and special districts) set a millage rate or tax rate, apply it to the assessed value of your home, subtract any exemptions, and bill you the result. Unlike income tax, which flows to the federal and state governments, property tax is overwhelmingly local: your city council and county commission — not Washington — decide most of what you pay.
The formula is simpler than it looks: assessed value × tax rate − exemptions = tax due. The twist is that "assessed value" is not always your market value. Some states assess at 100% of market value, while others use a lower assessment ratio — for example, South Carolina assesses owner-occupied homes at just 4% of market value, West Virginia at 60%, and Indiana caps a homestead's tax at 1% of assessed value. Knowing your state's rule is the first step to understanding your bill.
Every state writes its own rules. California's Proposition 13 limits annual assessed-value growth to 2% and resets value only at sale. Oregon's Measure 50 caps growth at 3%. Indiana's circuit-breaker caps the homestead bill at 1% of assessed value. Hawaii and Alabama lean on exemptions and the absence of a state property tax to keep bills low despite high home values or full-market assessment. These differences are why a $400,000 home can owe $800 in one state and $5,000 in another — and why a national average is misleading.
Most states offer a homestead exemption that removes part of your home's value from taxation if it is your primary residence. Seniors, disabled owners, and veterans often qualify for larger exemptions — a 100% service-connected-disabled veteran can be fully exempt in many states. Some states add a circuit breaker that refunds tax for lower-income owners whose bill exceeds a set share of income. Because exemptions are claimed locally, many eligible owners simply never file; checking your locality's programs is usually the highest-value action you can take.
Your tax rate is set each year by local budgets. When a school district asks voters for a new levy, or a county hires more staff, your millage can rise. Reassessment cycles also matter: a home reassessed after a hot market will see its assessed value jump, pushing the bill up even if the rate stays flat. Some states smooth this with caps; others let values move with the market. Following your local budget hearings is the only way to see a change coming.
Our tools turn this complexity into a number you can act on. The Property Tax Calculator estimates your annual bill from home value, state, and exemptions. The Homestead Exemption Calculator shows your savings. The Payment Calculator converts the annual bill into a monthly escrow figure. The Capital Gains Calculator estimates the tax on a home sale, and the Refinance Calculator shows how a new loan changes your housing payment including tax. Each is a planning tool, not a bill — always confirm figures with your local assessor.
Take a $350,000 home in a state that assesses at 100% of market value with a 1.0% effective rate and a $25,000 homestead exemption. Taxable value is $325,000; the annual bill is about $3,250, or roughly $271/month through escrow. In a state with a 0.4% rate and no exemption, the same home owes about $1,400 a year. The example shows why both the rate and the exemption shape your payment far more than the home's price alone.
Property tax is one of three big local/state taxes, alongside income and sales tax. Unlike income tax (paid on earnings) and sales tax (paid on spending), property tax is paid on wealth you hold, and it does not rise with your paycheck or your shopping. Supporters note it is stable and ties payment to local service benefit; critics point out it can be regressive — a fixed bill weighs more on lower-value homes — which is why circuit breakers and exemptions exist to soften the blow for seniors and lower-income owners.
Assessed value — market value times your state's assessment ratio, the base the rate hits. Millage — the tax rate in dollars per $1,000 of assessed value. Homestead exemption — a removal of primary-residence value before tax. Circuit breaker — an income-based refund for owners with high tax relative to income. Ad valorem — "according to value"; the principle behind the tax.
Property-tax reform is a permanent local debate. Common proposals include indexing exemptions to inflation (so they do not erode), modernizing assessments with more frequent updates, and tightening or loosening caps like Prop 13 or Indiana's circuit-breaker. Some states debate shifting more burden to state funding to relieve local pressure. Because the rules are local and constitutional in many states, change is slow — but it pays to follow your county commission and school board, since their votes move your bill directly.
Before you buy, estimate the bill for the specific address — never assume the listing's tax figure is current. If you are 65+, disabled, or a veteran, ask the assessor about exemptions the day you close. Appeal the assessed value if recent comparable sales are lower than your notice. And because rates are local, compare neighboring jurisdictions: the same home can owe far more across a county line. A few minutes with a calculator can save you hundreds of dollars a year.
Who decides my property tax rate? Primarily your local governments — county, city, school district, and special districts — through annual budget votes and voter-approved levies.
Is property tax the same in every state? No. Assessment ratios, caps, exemptions, and whether a state levies property tax at all vary enormously, so bills differ by 10x or more for the same home value.
What is a homestead exemption? A reduction in the taxable value of your primary residence, claimed with your local assessor; it is the single biggest saving for most owner-occupants.
Can I appeal my assessment? Yes. File with your local board of review or equalization using recent comparable sales as evidence; many owners successfully lower their assessed value.
Do these calculators give my real bill? They estimate it from the inputs you provide. Your actual bill depends on your specific assessed value, exemptions, and local levies — confirm with the assessor's office.
Pick the tool that matches your property tax question.
Property taxes are the primary source of revenue for local governments in the United States. Unlike federal or state income taxes, property taxes are levied locally—by counties, municipalities, school districts, and special districts. This means your property tax bill can vary dramatically depending on where you live, even within the same state.
The basic formula is: Assessed Value × Tax Rate = Annual Property Tax. However, the "assessed value" is not always equal to your home's market value. Many states assess property at a percentage of market value (for example, Pennsylvania assesses at 100%, while Nevada assesses at approximately 35% of market value). Additionally, homestead exemptions reduce the taxable value for primary residents in many states.
Yes. If you believe your home's assessed value is higher than its fair market value, you have the right to appeal in every state. The appeal process typically involves filing a formal appeal with your local board of assessment appeals, providing evidence (such as recent comparable sales or an independent appraisal) that supports your claimed value. Many homeowners successfully reduce their assessed value through appeal—potentially saving hundreds or thousands per year.
When budgeting for a home purchase, many buyers focus on principal and interest (P&I) but forget property taxes. In high-tax states like New Jersey, property taxes can add $10,000+ to annual housing costs. In low-tax states like Hawaii, the added cost may be under $2,000. Always factor property taxes into your affordability calculation.