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Iowa property guide

Iowa Property Tax Calculator

Estimate a property tax bill from assessed value, exemptions and local rates. Iowa rules and editable local assumptions are applied below.

By Calculate My Property EditorialUpdated September 30, 2026Professional review pending
01 / Your inputs

Start with your property.

County names: Census 2025. Enter your parcel’s millage below; county rates are awaiting verification.
Property2 inputs
USD
Assessment5 inputs
%
Applied only when no certified taxable value is entered.
USD
Zero estimates a newly assessed property.
USD
Enter a confirmed local exemption, after assessment conversion.
Local rates4 inputs
mills
Illustrative assumption. Replace with the parcel’s effective school millage.
mills
Illustrative county/city/district assumption, not a verified county rate.
USD / year
Special assessments and fixed charges, added after tax caps.
USD / year
Only relief deducted from this bill. Do not enter a later refund or a value exemption here.
All amounts in USD.
Your estimate

Estimated annual property tax

$6,300Based on your inputs · USD
Monthly equivalent
$525
Assessed / taxable scenario
$350,000
Effective rate on value
1.8%
See the breakdown
School taxable base
$350,000
Other taxable base
$350,000
School levy
$2,100
Other levies
$4,200
Tax after bill cap
$6,300
Approved tax-dollar credit applied
$0
Fixed / special charges
$0
The formula

Taxable bases × applicable millage ÷ 1,000 − approved bill credits + fixed charges

Assumptions & limitations (1)
  • Local millage is a user assumption until replaced with the parcel’s certified rates. County names do not establish a parcel tax rate.

Result breakdown

School taxable base$350,000
Other taxable base$350,000
School levy$2,100
Other levies$4,200
Tax after bill cap$6,300
Approved tax-dollar credit applied$0
Fixed / special charges$0

Assumptions & limitations

  • Local millage is a user assumption until replaced with the parcel’s certified rates. County names do not establish a parcel tax rate.

Calculation inputs

Calculate My Property · calculatemyproperty.com · Professional review pending

AssumptionEntered valueUnit / context
Tax year2026
Assessment inputsUse the state assessment model
Market / assessed value350000USD
Certified other-levy taxable value0USD
Certified school taxable value0USD
Assessment ratio100%
Prior taxable / assessed value0USD
Purchase / reassessment resetNo
Qualifying principal residenceNo
Other taxable-value exemption0USD
School millage6mills
Other millage12mills
Assessment inflation limit2.7%
Non-ad-valorem charges0USD / year
Approved annual tax-dollar credit0USD / year
Michigan administration fee0% of tax
stateiowa

All entered fields are retained for traceability; inactive modes may ignore some fields. Consult the formula and limitations for the selected calculation.

02 / Your next decisionTransfer TaxSeller Net Sheet
External resource

Considering a property-tax appeal?

Compare service terms, fees and state coverage with your assessment notice.

Explore OwnwellExternal provider or resource. No paid referral arrangement is active.
Planning estimate. Editorially sourced; independent professional review is pending. How we calculate
The Iowa details

How this state changes the estimate

Assessment and taxable value

Iowa property-tax assessment and collection are administered through its applicable state and local offices. A verified county levy schedule has not been imported for this jurisdiction. Enter the certified taxable assessment and the effective parcel rates rather than applying a guessed statewide percentage.

The default assessment conversion is 100.0% where the state uses a uniform ratio. A certified assessed value takes precedence. Do not substitute a county-wide average for a parcel’s taxing-district rates.

Exemptions and caps

Confirm Iowa eligibility and approved amounts with the assessor before entering a homestead, senior, veteran or disability adjustment. No unverified exemption is applied automatically.

Confirm eligibility using the primary source and local office. A purchase, property classification, tenancy type or exemption can change which rule applies. Enter documented local costs and rates rather than carrying a previous owner’s assumptions into the new deal.

Your bill calendar

Check the Iowa taxing jurisdiction for the bill year, payment installments and appeal deadline. No unverified statewide bill calendar is presented.

Independent professional review is pending. Current county millage is not yet published in this data set. Use the assessor’s certified taxable value and the tax collector’s current rates.

Iowa county directory & rate status

County equivalents are from the 2025 US Census Gazetteer. Millage is pending source verification; no county tax rate has been invented.

County / local equivalentCounty identifierRate status
Adair County19001Enter parcel’s certified rate
Adams County19003Enter parcel’s certified rate
Allamakee County19005Enter parcel’s certified rate
Appanoose County19007Enter parcel’s certified rate
Audubon County19009Enter parcel’s certified rate
Benton County19011Enter parcel’s certified rate
Black Hawk County19013Enter parcel’s certified rate
Boone County19015Enter parcel’s certified rate
Bremer County19017Enter parcel’s certified rate
Buchanan County19019Enter parcel’s certified rate
Buena Vista County19021Enter parcel’s certified rate
Butler County19023Enter parcel’s certified rate
Calhoun County19025Enter parcel’s certified rate
Carroll County19027Enter parcel’s certified rate
Cass County19029Enter parcel’s certified rate
Cedar County19031Enter parcel’s certified rate
Cerro Gordo County19033Enter parcel’s certified rate
Cherokee County19035Enter parcel’s certified rate
Chickasaw County19037Enter parcel’s certified rate
Clarke County19039Enter parcel’s certified rate
Clay County19041Enter parcel’s certified rate
Clayton County19043Enter parcel’s certified rate
Clinton County19045Enter parcel’s certified rate
Crawford County19047Enter parcel’s certified rate
Dallas County19049Enter parcel’s certified rate
Davis County19051Enter parcel’s certified rate
Decatur County19053Enter parcel’s certified rate
Delaware County19055Enter parcel’s certified rate
Des Moines County19057Enter parcel’s certified rate
Dickinson County19059Enter parcel’s certified rate
Dubuque County19061Enter parcel’s certified rate
Emmet County19063Enter parcel’s certified rate
Fayette County19065Enter parcel’s certified rate
Floyd County19067Enter parcel’s certified rate
Franklin County19069Enter parcel’s certified rate
Fremont County19071Enter parcel’s certified rate
Greene County19073Enter parcel’s certified rate
Grundy County19075Enter parcel’s certified rate
Guthrie County19077Enter parcel’s certified rate
Hamilton County19079Enter parcel’s certified rate
Hancock County19081Enter parcel’s certified rate
Hardin County19083Enter parcel’s certified rate
Harrison County19085Enter parcel’s certified rate
Henry County19087Enter parcel’s certified rate
Howard County19089Enter parcel’s certified rate
Humboldt County19091Enter parcel’s certified rate
Ida County19093Enter parcel’s certified rate
Iowa County19095Enter parcel’s certified rate
Jackson County19097Enter parcel’s certified rate
Jasper County19099Enter parcel’s certified rate
Jefferson County19101Enter parcel’s certified rate
Johnson County19103Enter parcel’s certified rate
Jones County19105Enter parcel’s certified rate
Keokuk County19107Enter parcel’s certified rate
Kossuth County19109Enter parcel’s certified rate
Lee County19111Enter parcel’s certified rate
Linn County19113Enter parcel’s certified rate
Louisa County19115Enter parcel’s certified rate
Lucas County19117Enter parcel’s certified rate
Lyon County19119Enter parcel’s certified rate
Madison County19121Enter parcel’s certified rate
Mahaska County19123Enter parcel’s certified rate
Marion County19125Enter parcel’s certified rate
Marshall County19127Enter parcel’s certified rate
Mills County19129Enter parcel’s certified rate
Mitchell County19131Enter parcel’s certified rate
Monona County19133Enter parcel’s certified rate
Monroe County19135Enter parcel’s certified rate
Montgomery County19137Enter parcel’s certified rate
Muscatine County19139Enter parcel’s certified rate
O'Brien County19141Enter parcel’s certified rate
Osceola County19143Enter parcel’s certified rate
Page County19145Enter parcel’s certified rate
Palo Alto County19147Enter parcel’s certified rate
Plymouth County19149Enter parcel’s certified rate
Pocahontas County19151Enter parcel’s certified rate
Polk County19153Enter parcel’s certified rate
Pottawattamie County19155Enter parcel’s certified rate
Poweshiek County19157Enter parcel’s certified rate
Ringgold County19159Enter parcel’s certified rate
Sac County19161Enter parcel’s certified rate
Scott County19163Enter parcel’s certified rate
Shelby County19165Enter parcel’s certified rate
Sioux County19167Enter parcel’s certified rate
Story County19169Enter parcel’s certified rate
Tama County19171Enter parcel’s certified rate
Taylor County19173Enter parcel’s certified rate
Union County19175Enter parcel’s certified rate
Van Buren County19177Enter parcel’s certified rate
Wapello County19179Enter parcel’s certified rate
Warren County19181Enter parcel’s certified rate
Washington County19183Enter parcel’s certified rate
Wayne County19185Enter parcel’s certified rate
Webster County19187Enter parcel’s certified rate
Winnebago County19189Enter parcel’s certified rate
Winneshiek County19191Enter parcel’s certified rate
Woodbury County19193Enter parcel’s certified rate
Worth County19195Enter parcel’s certified rate
Wright County19197Enter parcel’s certified rate
Download the state source record (JSON)
Iowa Transfer TaxBack to national calculator
Worked example

Follow the default numbers.

With market / assessed value of $350,000, the model gives estimated annual property tax: $6,300.

The formula is taxable bases × applicable millage ÷ 1,000 − approved bill credits + fixed charges. Open the breakdown to trace expenses and assumptions. Change one input at a time to see how your decision changes. This example uses scenario inputs; it is not an offer, tax bill, appraisal or legal determination.

Start with the assessor’s taxable value

Market value, assessed value and taxable value are not interchangeable. A certified taxable-value override is the safest input when you have the current parcel record. Without it, the calculator applies the selected state’s simplified assessment model to the entered value. School and other millage are applied separately where exemptions differ. A mill is one dollar per thousand dollars of taxable value.

A county is not one tax district

School, city, special-district and bond levies can differ within the same county. The county selector identifies the jurisdiction; it does not imply a single county-wide bill rate. The sample millages are clearly labeled assumptions. Replace them with the effective levies for the parcel and tax year, then add non-ad-valorem charges separately.

A purchase can reset the assessment

Existing-owner assessment caps may not transfer to a buyer. Michigan taxable value can uncap after a transfer; California can re-establish a base value; Florida’s Save Our Homes benefit has transfer and portability conditions. Select a reassessment reset when modeling a new purchase unless the assessor confirms another treatment. A seller’s current bill can substantially understate the buyer’s tax expense.

Tax relief needs eligibility

Homestead status, age, disability and veteran exemptions depend on state and local rules. Only the basic modeled homestead treatment is automatic. Other exemptions are a manually confirmed taxable-value adjustment. Credits, levy-specific deductions, tax freezes and appeal relief can require a different calculation. The state notes and official source links explain what to check before using the result in a rental or net sheet.

Keep your assumptions with the result

Save the calculation to your deal file to reuse compatible inputs in another tool. The file stays in this browser on this device. Download the CSV to open the complete inputs, results and schedule in Excel or Google Sheets. Use PDF to print the report or save it as a PDF. A share link includes entered financial figures in its URL, so use it only with people you intend to share those numbers with.