Property Tax Calculator

Estimate your property taxes and see how they may change over time

Annual Property Tax
$4,400
current year
Monthly Tax
$367
per month
Effective Tax Rate
1.10%
of home value
Total Over 20 Years
$153,825
cumulative taxes
Property Details
$400,000
1.1%
%
100%
%
3%/yr
%
2%/yr
%
20 years
yrs
Property Tax Projection
Annual Tax
Cumulative Tax
Year-by-Year Breakdown
YearHome ValueAnnual TaxMonthlyCumulative
1$412,000$4,623$385$4,623
2$424,360$4,857$405$9,479
3$437,091$5,102$425$14,581
4$450,204$5,360$447$19,942
5$463,710$5,632$469$25,574
6$477,621$5,917$493$31,490
7$491,950$6,216$518$37,706
8$506,708$6,531$544$44,237
9$521,909$6,861$572$51,098
10$537,567$7,208$601$58,306
11$553,694$7,573$631$65,879
12$570,304$7,956$663$73,835
13$587,413$8,359$697$82,194
14$605,036$8,782$732$90,976
15$623,187$9,226$769$100,202
16$641,883$9,693$808$109,894
17$661,139$10,183$849$120,078
18$680,973$10,699$892$130,776
19$701,402$11,240$937$142,016
20$722,444$11,809$984$153,825

How the Property Tax Calculator works

Property tax is an annual tax on real estate, calculated by multiplying your property's assessed value by your local tax rate (often expressed as a millage). This calculator estimates the annual and monthly tax bill and projects how it grows over time as assessments rise.

Rates and assessment rules vary enormously by state and county — effective rates range from under 0.3% to over 2% of market value. Because tax is usually escrowed into the mortgage payment, increases show up as a bigger monthly bill even with a fixed-rate loan.

The formula
Annual tax = Assessed value × Assessment ratio × Tax rate
  • Assessed value — the taxing authority's valuation (not always market value)
  • Assessment ratio — the fraction of value that's taxable in your area
  • Tax rate — local millage / percentage rate

Tips to get the most out of it

  • Look up your county's actual effective rate — the national range is wide enough to change affordability math materially.
  • Homestead exemptions, senior freezes, and veteran exemptions can cut the bill; they usually require a one-time application.
  • After buying, your home may be reassessed at the purchase price — expect the seller's old tax bill to rise.

Frequently asked questions

Why did my property tax go up when my mortgage rate is fixed?

The principal-and-interest part of your payment is fixed; taxes and insurance are not. When assessments or rates rise, your escrow payment increases to cover the bigger bills — sometimes with a catch-up adjustment for a prior shortfall.

Can I appeal my property tax assessment?

Yes. Most jurisdictions allow appeals within a window after assessment notices go out. Appeals succeed when you can show comparable homes assessed or sold for less, or errors in your property record (wrong square footage, condition issues). It costs little and reductions persist for years.

Is property tax deductible?

U.S. taxpayers who itemize can deduct state and local taxes — including property tax — up to the SALT cap ($10,000 for most filers under current law). Many households taking the standard deduction get no additional benefit. Consult a tax professional for your situation.

How do I estimate taxes on a home I'm buying?

Don't rely on the seller's current bill — many areas reassess at sale. Multiply your expected purchase price by the local effective tax rate, and check the assessor's site for the assessment ratio and any exemptions you'd qualify for.

From the Knowledge Base

How Property Taxes Are Calculated — and How to Lower Yours

Assessed value times local rate sounds simple, but exemptions, reassessments, and appeals move the number by thousands. What homeowners should know.

Read the guide