The Property Tax Calculator estimates property tax from assessed value and a tax rate or mill rate, then splits the annual bill into a monthly amount for escrow planning. Enter assessed value and the local rate, and the Property Tax Calculator returns annual tax and the monthly figure so the housing cost stack stays complete.
Assessed value often differs from market price. Rates are set by local taxing authorities and can change with budgets and reassessments. Use the assessment notice and the published rate for the parcel's jurisdiction.
*These results are estimates for information only, not tax or legal advice. Confirm assessed value, exemptions, and the official rate with the local assessor or tax collector.*
Calculate your property tax
The Property Tax Calculator calculates annual property tax by multiplying the parcel's assessed value by the applicable local tax rate in effect for that year. Annual property tax is the bill before exemptions that owners and lenders commonly use for escrow estimates.
When the rate is a percent, annual tax = assessed value x tax rate. A $300,000 assessed value at 2% produces $300,000 x 0.02 = $6,000 per year. Exemptions, homestead reductions, and special assessments can raise or lower the payable amount; enter the taxable assessed value after exemptions when those apply.
Market value is not always the assessment base. If market value is $350,000 but assessed value is $300,000, the Property Tax Calculator should use $300,000 unless the jurisdiction taxes on full market value. A second check: if the assessment ratio is published as 80% of market, an estimated assessed value is 0.80 x market, but the official notice still wins over any estimate.
Special assessments for sidewalks, sewers, or local improvement districts can appear on the same bill as the general levy. Enter them as an add-on when the goal is the full amount due, or exclude them when comparing only the mill-based general tax across years.
Apply the mill rate
The Property Tax Calculator applies a mill rate by treating one mill as $1 of tax per $1,000 of assessed value. Mill rates are how many local taxing authorities choose to publish the levy instead of writing a plain percent.
Annual tax = assessed value x (mills / 1,000). A 20-mill rate means $20 per $1,000 of assessed value, which is 2%. On a $300,000 assessment: 300,000 x 20 / 1,000 = $6,000 per year, the same as the 2% example. A 15-mill rate on the same assessment is 300,000 x 15 / 1,000 = $4,500 per year.
Convert mills to a decimal rate by dividing by 1,000 when comparing to percent quotes. The Property Tax Calculator accepts either form so mill-based notices and percent-based worksheets land on the same annual tax. County, city, school, and special-district mills are often stacked; if the notice lists 12 + 5 + 3 mills, the combined rate is 20 mills before exemptions, not the single largest line alone.
When only a dollar tax and an assessed value are known, implied mills = (annual tax / assessed value) x 1,000. On $6,000 tax and $300,000 assessed value, implied mills = (6,000 / 300,000) x 1,000 = 20. That reverse check confirms the rate used in the forward calculation.
Find the monthly property tax
The Property Tax Calculator finds the monthly property tax amount by dividing the annual tax figure by 12 for escrow and household cash-flow planning. Mortgage lenders often collect one-twelfth of the estimated annual tax amount with each regular mortgage payment.
On a $6,000 annual tax, monthly property tax = 6,000 / 12 = $500. Escrow cushions and reassessments can make the servicer collect more or less than that plain twelfth. When shopping a mortgage payment, add principal and interest, monthly tax, and monthly insurance for a fuller housing figure. Example stack: $1,450 principal and interest + $500 tax + $150 insurance = $2,100 total monthly housing before other fees.
If taxes are paid in one or two installments rather than escrowed, the monthly figure is still useful for budgeting even when cash leaves the account on the tax due dates. The Property Tax Calculator reports both annual and monthly so either payment pattern can use the same estimate. Mid-year reassessment can change the second installment; rerun the estimate when a new assessed value arrives rather than carrying last year's twelfth forward blindly.
A purchase offer that budgets only principal and interest understates carrying cost when tax is $500 per month. Adding the Property Tax Calculator output to the loan quote before signing keeps the housing budget honest.
Frequently asked questions
How is property tax calculated?
Property tax is assessed value multiplied by the tax rate (or mills / 1,000). The Property Tax Calculator applies that product. A $300,000 assessment at 20 mills (2%) is $6,000 per year.
What is a mill rate?
One mill is $1 of tax per $1,000 of assessed value. The Property Tax Calculator converts mills with assessed value x mills / 1,000. Twenty mills equal a 2% rate.
How do you get the monthly property tax?
Divide annual tax by 12. The Property Tax Calculator shows that monthly amount for escrow planning. A $6,000 annual tax is $500 per month before escrow cushions.
Is assessed value the same as market value?
Not always. Many jurisdictions assess below market or use a scheduled ratio. The Property Tax Calculator should use the taxable assessed value from the notice, not an unverified sale price.
Do exemptions change the result?
Yes. Homestead and other exemptions reduce taxable value or the bill. Enter the post-exemption taxable value when computing what will actually be owed.
How does this relate to mortgage tools?
Mortgage payment quotes often escrow tax and insurance. The Property Tax Calculator supplies the tax leg; the Mortgage Calculator combines principal, interest, and escrow components on QuickCalculators.
What if several taxing districts apply?
Many parcels face stacked county, city, school, and special-district mills. Add the mills (or rates) that apply to the parcel, then multiply by assessed value. The Property Tax Calculator uses the combined rate entered; pull the stack from the tax bill rather than a single district's published millage.
Can the bill change after purchase?
Yes. Reassessment, rate votes, lost exemptions, and new special assessments change the tax. Rerun the Property Tax Calculator when the assessment notice or rate changes, especially before locking an escrow estimate into a refinance or purchase budget.
Summary
The Property Tax Calculator multiplies assessed value by a percent rate or by mills / 1,000, so a $300,000 assessment at 20 mills equals $6,000 per year and $500 per month. Mill rates and percent rates describe the same levy when converted correctly, and stacked district mills should be summed before multiplying. Assessed value, exemptions, and local rates change; confirm them with the assessor. These results are estimates for information only, not tax advice.