2026 Property Tax Due Dates
September 30
First half
March 31
Second half
Payment Methods
Online, Mail, In-Person
Story County Treasurer
Phone
(515) 382-7330How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Story County Treasurer
In Person
Visit the Treasurer's office
About Property Taxes in Iowa
Iowa property taxes are administered at the county level. Property is assessed at 100% of market value, but only a portion of that value is actually taxable due to Iowa's rollback system. The residential rollback — set annually by the state — limits how much of a property's assessed value is subject to taxation, and it typically results in 50–60% of the assessed value being taxable. This rollback helps limit tax increases when property values rise rapidly. Iowa taxes are paid in two installments in the year following assessment, making them one year in arrears.
Payment & Assessment
Iowa property taxes are paid in two equal installments for the prior fiscal year: First installment: Due September 1 (delinquent after September 30) Second installment: Due March 1 (delinquent after March 31) A 1.5% monthly penalty applies to late payments. After a period of delinquency, a tax sale may be held and the lien sold to a third party. Most counties offer online payment through the county treasurer's website. Contact your county treasurer for available payment methods.
Statewide framework for Iowa. Your county's specific rates and deadlines are shown above.
Other Counties in Iowa
About Story County
Story County is a county in the U.S. state of Iowa. As of the 2020 census, the population was 98,537, making it the ninth-most populous county in Iowa. The county seat is Nevada and the largest city is Ames. The geographical center of Iowa lies in Story County, 5 miles (8.0 km) northeast of Ames. Story County comprises the Ames, IA Metropolitan Statistical Area, which is included in the Des Moines-Ames-West Des Moines, IA Combined Statistical Area. The county is home to Iowa State University in Ames.
Source: Wikipedia — content available under CC BY-SA 4.0
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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.