Property Tax Calculator
Tax & IncomeAnnual tax on a property's value.
Value & rate
Assessment & tax breakdown
| Item | Amount |
|---|---|
| Assessed value | $0 |
| Taxable value | $0 |
| Property tax (0.0%) | $0 |
| Per month | $0 |
Insights
- Your effective rate is 0.0% of market value, versus the 0.0% nominal rate.
- At today's bill that's about $0 over ten years, before any reassessment.
Know what this estimate is based on
- Jurisdiction
- United States unless the calculator explicitly says otherwise
- Rules and time period
- Tax years supported by the selected calculator
- Scope and limitations
- Educational estimate only, not a tax return or filing determination. U.S. statutory-threshold tools use USD. Confirm current law and your facts with the relevant authority or a qualified tax professional.
- Source links checked
- Jul 30, 2026
Built and regression-tested by Smart Tools Lab. It has not been individually reviewed by a licensed financial, tax, or legal professional.
How to use
- 01
Enter the Assessed value of the property — the figure your local tax authority uses to value the home, which may differ from what you paid or could sell it for.
- 02
Set the Property tax rate that applies in your area; this is the annual percentage levied on the taxable value of your home.
- 03
Open Advanced options to fine-tune the Assessment ratio (the share of value that is actually taxed) and any Homestead exemption you qualify for, then read your Annual property tax, the per-month figure, your effective rate, and the full assessment-and-tax breakdown.
Formula
The calculator starts from the Assessed value you enter and applies the Assessment ratio to find the assessed amount the authority actually taxes (assessed value × assessment ratio ÷ 100). It then subtracts any Homestead exemption to leave the taxable value, never letting it fall below zero (taxable value = assessed amount − exemption). Your Annual property tax is that taxable value multiplied by the Property tax rate (taxable value × rate ÷ 100), and the per-month figure is simply the annual bill divided by twelve. The effective rate divides the annual tax by the original assessed value and is shown as a percentage (annual ÷ assessed value × 100), giving you the true share of your home's value paid in tax each year. The exemption saving is the smaller of your exemption or the assessed amount, multiplied by the rate.
Example
Take a home with an Assessed value of $4,000,000 and a Property tax rate of 1.2%. With the Assessment ratio left at 100% and no Homestead exemption, the full $4,000,000 is taxable, so the Annual property tax is $4,000,000 × 1.2% = $48,000, which works out to $4,000 per month and an effective rate of 1.2%. Now open Advanced options and set the Assessment ratio to 50% with a $500,000 Homestead exemption. The assessed amount drops to $4,000,000 × 50% = $2,000,000, the exemption removes $500,000 to leave a taxable value of $1,500,000, and the Annual property tax falls to $1,500,000 × 1.2% = $18,000 — just $1,500 per month. Because the tax is now measured against the same $4,000,000 of value, the effective rate is only 0.45%, showing how the ratio and exemption together cut your real burden by more than half.
Definitions
- Assessed value
- The value your local tax authority assigns to the property as the basis for tax. It can sit above or below the market price and is the starting point for the whole calculation (0 to 200,000,000).
- Property tax rate
- The annual percentage levied on your taxable value, often expressed locally as a mill or millage rate. Multiply it by the taxable value to get the yearly bill (0% to 5%).
- Assessment ratio
- The share of the assessed value that is actually subject to tax. Many jurisdictions tax only a fraction of value, so a ratio below 100% lowers the taxable base (advanced, default 100%, range 1% to 100%).
- Homestead exemption
- A fixed amount of value removed from the taxable base for an owner-occupied primary residence, reducing the bill before the rate is applied (advanced, default 0, range 0 to 50,000,000).
- Taxable value
- The amount the rate is finally applied to: the assessed amount after the assessment ratio, minus any homestead exemption, floored at zero.
- Annual property tax
- The headline result: the full tax due for the year, equal to the taxable value multiplied by the property tax rate.
- Effective rate
- The annual tax divided by the original assessed value, shown as a percentage. It reflects the true share of your home's value you pay each year after the ratio and exemption are taken into account.
Good to know
What property tax pays for and why it exists
Property tax is the financial backbone of local government in most of the world. Unlike income or sales tax, which often flow to national treasuries, the money raised from taxing homes and land usually stays close to where you live and funds the services you use every day. Public schools are typically the single largest beneficiary, which is why districts with strong schools often carry higher rates. Beyond education, your bill helps pay for roads and their maintenance, fire and police departments, libraries, parks, rubbish collection, water and sewer infrastructure, and local administration. Because it is tied to immovable property rather than mobile income, property tax is a remarkably stable and predictable source of revenue for a town or county, which is exactly why local authorities rely on it so heavily. Understanding that your payment is essentially a subscription to local services can reframe the bill: a higher rate sometimes signals better-funded schools and infrastructure, while a low rate may mean services are paid for in other ways or simply run leaner. This calculator turns an abstract rate into a concrete annual and monthly figure so you can see precisely what those services cost you on the property you own or are thinking of buying.
Assessed value versus market value and the assessment ratio
The most misunderstood part of any property tax bill is the value it is built on. Market value is what a willing buyer would pay today, but tax is charged on the assessed value, a figure your local assessor calculates and which can differ sharply from the sale price. Assessors use mass-appraisal models, recent comparable sales, and physical characteristics to set this number, and they update it on a cycle that may be annual or stretch over several years. Layered on top is the assessment ratio, the fraction of value that is actually taxed. Some jurisdictions assess at full market value, applying a ratio of 100%, while others deliberately tax only 50%, 40%, or even less of the value, then set their rates accordingly. A home assessed at $4,000,000 with a 50% ratio is taxed as if it were worth $2,000,000. This is why two homes with identical market prices can carry very different bills across city lines, and why comparing raw tax rates between areas is misleading without also knowing the ratio. The advanced field in this calculator lets you model the ratio directly, so the taxable base reflects how your jurisdiction actually works rather than assuming the full value is taxed.
Mill rates and how the tax rate is expressed
The percentage you enter as the Property tax rate goes by many names, and the one you will most often meet on an official notice is the mill or millage rate. A mill is one-thousandth of a currency unit: one mill equals $1 of tax for every $1,000 of taxable value. Local governments favour mills because they make it easy to combine the separate levies that make up a single bill. Your total rate is usually a stack of charges from overlapping authorities — the county, the city, the school district, and special districts for things like libraries, fire protection, or flood control — each of which sets its own millage. Add them together and you get the combined rate that hits your property. Converting between mills and the percentage this tool uses is straightforward: divide the mill rate by ten, so 12 mills is 1.2% and 25 mills is 2.5%. When you read your bill, look for the breakdown that shows each taxing body's share; it explains why your rate is what it is and where an increase originated. Entering the combined figure here gives you the all-in cost, while knowing the components tells you which local decisions drive it.
Homestead and other exemptions that cut your bill
Exemptions are the most direct way to reduce a property tax bill, because they shrink the taxable value before the rate is ever applied. The most common is the homestead exemption, which rewards living in the property you own by removing a fixed slice of value, or sometimes a percentage, from the taxable base of a primary residence. Because it comes off the value rather than the tax, its worth scales with your rate: a $500,000 homestead exemption at a 1.2% rate saves $6,000 every year. Many places stack additional relief on top for people who need it most — senior citizens often qualify for an extra exemption or a freeze that caps future increases, military veterans and their surviving spouses frequently receive substantial reductions, and people with qualifying disabilities may have part or all of their bill waived. Some jurisdictions also offer exemptions for agricultural land, energy-efficient improvements, or historic properties. The catch is that exemptions almost never apply automatically; you usually have to file an application, sometimes once and sometimes every year, and missing the deadline means paying full freight. Use the Homestead exemption field here to model the saving, and treat it as a prompt to check which reliefs you are leaving on the table.
Reassessments, caps, and how to appeal
Your assessed value is not fixed forever. Authorities reassess property on a schedule — some every year, others every two, three, or more — to keep values current as the market moves. A reassessment can lift your bill sharply even if the rate stays flat, which is why a strong housing market often brings higher taxes in its wake. To soften the shock, many places impose an assessment cap that limits how much the taxable value can rise in a single year, protecting long-term owners from being priced out by a sudden surge. When you receive a new assessment notice, read it carefully: it is your formal opportunity to push back. If the assessor has the square footage wrong, missed that your basement is unfinished, or valued your home well above genuinely comparable nearby sales, you can file an appeal within the window your jurisdiction allows, usually a matter of weeks. A successful appeal lowers the assessed value, and because the rate is applied to that value, the saving repeats every year until the next reassessment. Gather evidence — photos, recent sales of similar homes, a private appraisal — before you file, and run the corrected assessed value through this calculator to quantify exactly what a successful challenge would be worth.
Property tax inside the mortgage escrow and PITI payment
For most homeowners with a loan, property tax is not a separate bill they pay once or twice a year but a quiet line inside the monthly mortgage payment. Lenders commonly bundle four costs into one figure known as PITI: principal, interest, taxes, and insurance. The taxes and insurance portions are collected each month and held in an escrow or impound account, and the lender pays the full property tax bill on your behalf when it falls due. This is why your monthly housing cost is meaningfully higher than principal and interest alone, and why a rising tax bill can increase your mortgage payment even though your loan terms never changed — the lender simply adjusts the monthly escrow to cover the larger annual tax. The per-month figure this calculator produces is exactly the slice that lands in your escrow, so it is the number to add when you estimate true monthly affordability. Pair this tool with the Mortgage calculator to see the full PITI picture: the Mortgage calculator handles principal and interest, and the monthly property tax shown here is the amount to layer on top for a realistic view of what owning the home actually costs each month.
Planning for rising bills and budgeting month to month
Property tax is one of the most predictable large expenses of homeownership, which makes it one of the easiest to plan around if you treat it as a monthly commitment rather than an annual surprise. Even if you pay the authority directly in one or two instalments, setting aside the per-month figure from this calculator into a dedicated savings pot smooths the burden and removes the scramble when the bill arrives. Build in some headroom, because the bill rarely stands still: assessed values tend to climb with the market, local governments raise rates to fund growing budgets, and temporary exemptions or caps can expire. A sensible rule is to assume your bill will rise a few percent a year and to budget for that drift rather than this year's exact figure. If you are weighing a purchase, run the numbers here before you commit, because a high rate or low assessment ratio can swing the true monthly cost by hundreds of dollars and change which homes are genuinely affordable. Re-running the calculator each time you receive a new assessment notice or rate change keeps your budget honest, turns a once-a-year shock into a manageable monthly number, and helps you spot early when an appeal or a fresh exemption is worth pursuing.
Frequently asked questions
What is the difference between assessed value and market value?
Market value is roughly what your home would sell for today; assessed value is the figure your local authority sets for tax purposes. They are rarely identical. Many areas assess at only a fraction of market value through the assessment ratio, and assessments are updated on a cycle, so they lag behind a fast-moving market. This calculator taxes the assessed value, so enter the number from your assessment notice, not your estimated sale price.
What is a mill rate and how does it relate to the percentage I enter?
A mill is one-tenth of a cent, or $1 of tax for every $1,000 of taxable value. Local governments often quote rates in mills rather than percent: 12 mills means $12 per $1,000, which is the same as 1.2%. To convert mills to the percentage this tool uses, divide the mill rate by 10. So a 25-mill rate becomes 2.5% in the Property tax rate field.
How can I lower my property tax bill or appeal my assessment?
Start by checking your assessment notice for errors in square footage, lot size, or features. If comparable homes nearby are assessed lower, you may have grounds to appeal — most authorities allow a formal challenge within a set window each year. Claiming every exemption you qualify for, such as the Homestead exemption in this calculator or senior and veteran relief, is often the fastest win because it cuts the taxable value directly.
What is a homestead exemption and do I qualify?
A homestead exemption shields part of your home's value from tax if it is your primary, owner-occupied residence. It is subtracted from the assessed amount before the rate is applied, so it lowers every year's bill. Rules vary widely by location, and you usually have to apply once rather than receiving it automatically. Second homes and rental properties typically do not qualify, so leave the field at zero for those.
Is property tax charged monthly or annually?
Property tax is assessed annually, but how you pay it varies. Many owners pay in one or two lump sums directly to the authority, while those with a mortgage usually pay one-twelfth each month into an escrow account, and the lender forwards the full bill when it is due. This calculator shows both the annual total and the per-month figure so you can budget either way; see the Mortgage calculator for how it folds into your monthly payment.
Why did my property tax bill go up when I didn't change anything?
Two things drive most increases: a higher assessed value after a reassessment, and a higher rate set by your local government to fund schools, services, or debt. Either can raise the bill on its own, and they often move together when property values rise. Expiring exemptions, new local levies, or the end of an assessment cap can also push it up. Re-run this calculator with your new assessed value and rate to see exactly which lever moved.