Assessment Ratio
100%
Protest Deadline
April 30, 2026
Official Form
Board of Review protest form
Risk of Increase
No
How Assessment Works in Iowa
Iowa assesses property at 100% of actual (market) value. However, a rollback percentage is applied that reduces the taxable value for residential property (currently around 46-56%). Your assessed value should reflect market value, but you pay taxes on the reduced rollback amount.
How to File in Iowa
File a protest with your county Board of Review by April 30. Protests can be filed in writing or by appearing before the Board during its session.
Step-by-Step
Iowa Protest Process
Receive your assessment notice from the county assessor (mailed in early April).
File a written protest with the Board of Review by April 30.
Attend the Board of Review hearing (sessions run April 16 through May 31).
Present your comparable sales evidence.
If denied, appeal to the Iowa Property Assessment Appeal Board (PAAB) within 20 days.
FAQ
Iowa Property Tax Protest Questions
Can my Iowa assessment increase if I protest?
No. Iowa law prohibits the Board of Review from increasing your assessment as a result of your protest. Your value can only stay the same or go down.
What is the rollback in Iowa?
The rollback is a percentage applied to your assessed value to determine taxable value. It is set by the state to limit total property tax revenue growth. For residential property, the rollback is typically 46-56%, meaning you pay taxes on roughly half your assessed value.
How often are Iowa properties reassessed?
Iowa reassesses all property every two years (odd-numbered years). You can protest in any year, but the most significant value changes typically occur in reassessment years.
What is the effective property tax rate in Iowa?
Iowa property tax rates vary by county, municipality, and school district, but the effective rate (annual tax paid divided by market value) typically ranges from about 0.5% to 2.5%. Because Iowa assesses property at 100% of market value, your actual tax bill depends on both the assessed value and the local millage or mill levy applied on top of it. If your assessed value is higher than comparable sales support, filing a protest is one of the only ways to reduce your effective rate without waiting for a reassessment.
How long does a property tax protest take in Iowa?
Most Iowa protests take between 6 weeks and 6 months from filing to final decision. After you file Board of Review protest form, the assessor or review board schedules a hearing — typically within 30 to 90 days — and issues a written decision shortly after. Cases that settle informally resolve faster, while cases that advance to a formal hearing or court appeal can take several additional months. ProtestMax prepares your full evidence packet in minutes so you can file immediately and start the clock.
Can I protest my property taxes every year in Iowa?
Yes. In Iowa, homeowners generally have the right to protest their property tax assessment every year, as long as you file by the April 30, 2026 deadline. Even if you won a reduction last year, your assessor can revalue your property the following year, and you retain the right to challenge the new value. Annual protests are especially important during years when market values are flat or falling but assessments keep rising.
What evidence is most persuasive in Iowa hearings?
The strongest evidence in a Iowa protest hearing is recent comparable sales — homes similar to yours in size, age, condition, and location that sold for less than your assessed value within the last 6 to 12 months. Equity comparisons (similar homes assessed for less than yours) are also highly persuasive. Photos of deferred maintenance, structural issues, or negative location factors (busy roads, flood zones, power lines) strengthen your case further. ProtestMax assembles all of this evidence into a hearing-ready packet tailored to Iowa's rules.