How to Appeal Your Property Tax in Iowa: Step-by-Step Guide

Iowa assessment protests go to the local board of review for your county or city assessor. You file between April 2 and April 30 of the assessment year (Iowa Code § 441.37(1)(a)(1)). In a county under a qualifying disaster declaration, the filing period is extended through June 5.

Iowa protest and appeal calendar

Outside disaster counties the April dates are fixed in the statute, so they are the same in every assessing jurisdiction. The Department of Revenue’s protest form, 56-064a (06/20/2025), adds that it “must be postmarked no later than April 30.” When April 30 falls on a Saturday or Sunday, a protest filed or postmarked the following Monday is timely under the department’s rule, Iowa Administrative Code r. 701—102.20(4)(a)(1); the next such year is 2028. The last amendment to § 441.37 was House File 270 of 2023, effective July 1, 2023, which rewrote the disaster rule. It added governor’s disaster proclamations to federal declarations, moved the extended window to May 1–June 5, and let the board sit until July 15.

The disaster extension turns on a declaration made “after March 1 and prior to May 20” of the assessment year. For 2026, PAAB announced on May 21 that taxpayers in Buchanan, Carroll, Crawford, Clay, Emmet, Grundy, Hancock, Harrison, Henry, Palo Alto, Pocahontas, Plymouth, Wapello, Washington, Winnebago, Woodbury and Worth counties “have until June 5, 2026, to file an assessment protest.” That list is dated May 20; the declarations themselves are posted by Iowa Homeland Security and Emergency Management.

County or city assessor: who your board of review is

Every county has an assessor, and a city of 10,000 or more may create its own assessor’s office with its own board of review (§ 441.1). File with the board of review of the jurisdiction that assessed your property. PAAB tells owners that the protest form “goes to your local assessor’s office” and that board of review protests “cannot be filed using PAAB’s eFile system.” Electronic filing to a board of review is available only where that board has allowed it, and a board that allows it must say so on the assessment roll notice (§ 441.37(3)).

Notices come before the window opens. An assessor who raises an assessment must mail notice “postmarked no later than April 1” (§ 441.28), and owners must be told of any adjustment “not later than April 1” (§ 441.23). Real estate is reassessed in odd-numbered years, but “property shall be assessed for taxation each year” and the assessor may revalue in between (§ 428.4), so an even-year notice can also be protested.

The five grounds on form 56-064a

A protest “must be confined to one or more” of these (§ 441.37(1)(a)(1)):

1. the assessment “is not equitable as compared with assessments of other like property in the taxing district”;
2. the property “is assessed for more than the value authorized by law”;
3. it “is not assessable, is exempt from taxes, or is misclassified”;
4. “there is an error in the assessment”;
5. “there is fraud or misconduct in the assessment which shall be specifically stated.”

The fifth ground carries a cost rule. If the board of review, PAAB or a district court decides for you and finds fraud or misconduct in the assessment, your “reasonable costs incurred in bringing the protest or appeal” are paid from the assessment expense fund, and those costs include legal, appraisal and witness fees (§ 441.37(1)(a)(2)-(3)).

An oral hearing is available only if you ask for it in writing when you file. You may combine several parcels on one form if the grounds are the same (§ 441.37(1)(c)). A clerical or mathematical error may be protested for earlier years too, as long as that year’s taxes are not fully paid (§ 441.37(2)).

PAAB’s guidance on inequity is specific: “More than one comparable is required to show inequity,” the comparables must be “in same assessing jurisdiction,” and “simply comparing assessed values or rates of change (percentage increase) in assessed values is not sufficient to prove inequity.” For an over-assessment claim, you need evidence of both the error and the correct value (Soifer v. Floyd County Board of Review, 759 N.W.2d 775 (Iowa 2009), as cited by PAAB).

Who carries the burden, and the 2027 change

Under § 441.21(3), “the burden of proof shall be upon any complainant attacking such valuation as excessive, inadequate, inequitable, or capricious.” It shifts once you offer “competent evidence that the market value of the property is different than the market value determined by the assessor”; after that the burden sits with those defending the value.

Senate File 2472, signed May 18, 2026, adds a rule for residential property from the 2027 assessment year. If the value rose ten percent or more over either of the two prior assessment years, including through an equalization order, and the rise did not come from new construction, improvements, renovations or a change in class or use, the assessor’s value “is not presumed to be the actual value.” The assessor then has the burden in any protest or appeal. Also from the 2027 assessment year, whenever a residential property’s value rises ten percent or more over either of the two prior assessment years, whatever the cause, the assessor must give the owner “a statement of the reasons for the increase in actual value,” including the portion due to a change in class, revaluation, new construction, improvements or renovations (§ 441.21(3)(a) as amended). The same law, effective July 1, 2026, bars ex parte contact with board of review members during protests (§ 441.33(3)).

Board of review sessions and decisions

The board convenes on a date it picks between May 1 and May 7 and, absent an extension, must finish by May 31. The Department of Revenue may extend a session to July 15, and protests still undecided on July 15 “shall be automatically overruled” (§ 441.33(1)). The board sends written notice of its action and “the reasons for the action taken” on each parcel (§ 441.37(4)). An informal review never replaces the protest: the assessor may recommend a change or sign an agreement with you, but § 441.30(4) keeps your right to protest, and PAAB states, “You cannot file an appeal to PAAB from the informal review.”

PAAB or district court

PAAB says, “There is no cost to file a PAAB appeal,” and § 441.37A(3)(e) makes each party “responsible for the costs of the appeal incurred by that party”. It reads the statutory deadline this way: if the board of review adjourned on or before May 31, “You must file your appeal on or before June 20”; if later, within 20 calendar days of adjournment. PAAB adds that a deadline landing on a Saturday, Sunday or holiday moves to the next business day. File through PAAB’s eFile system or on its Appeal from Board of Review Action form. Paper counts as filed when delivered in person, handed to a courier, or mailed first-class with proof of mailing; PAAB does not take new appeals by email or fax.

At PAAB you may raise new grounds and new evidence, and there is “no presumption as to the correctness of the valuation” (§ 441.37A(1)(b), (3)(a)). PAAB “does not have any of the information you gave the local board of review,” so file it again as exhibits. If you asked for a hearing and do not show up, the appeal is dismissed unless PAAB finds good cause, and after that dismissal PAAB has “no jurisdiction to consider any subsequent appeal on the appellant’s protest” (§ 441.37A(2)(a)). Going straight to district court under § 441.38 is heard “in equity,” also with new grounds allowed. A later court challenge to a PAAB decision cannot add grounds or evidence (§ 441.37B).

Taxes during the appeal

“The levy of taxes on any assessment appealed to the board shall not be delayed by any proceeding before the board.” If PAAB reduces the assessment, taxes on the reduced portion are abated, or refunded or credited against future taxes at your option (§ 441.37A(3)(c)).

Related Iowa and neighboring-state guides

• Iowa property tax: rates, the rollback and credits
• Property tax calculator
• Minnesota property tax appeals
• Wisconsin property tax appeals
• Illinois property tax appeals
• Missouri property tax appeals
• Nebraska property tax appeals
• South Dakota property tax appeals

Iowa board of review FAQ

I missed April 30. Is there any way back in this year?

For a protest of the value itself, only if your county was under a disaster declaration made after March 1 and before May 20; then the filing period is extended through June 5 (§ 441.37(1)(a)(1)). In a year when April 30 falls on a Saturday or Sunday, a protest filed or postmarked the following Monday also counts as on time (Iowa Administrative Code r. 701—102.20(4)(a)(1)). PAAB warns that “the board of review cannot extend deadlines.” A clerical or mathematical error is treated differently: § 441.37(2)(a) lets you protest it “for previous years,” and the board may correct it for any assessment year in which the taxes “have not been fully paid or otherwise legally discharged.”

Can the board of review raise my value?

It can. The board has the power “to equalize assessments by raising or lowering the individual assessments of real property, including new buildings, made by the assessor” (§ 441.35(1)(a)).

Does an informal review stop the April 30 clock?

No. The informal window closes April 25 and the protest window still ends April 30. If the assessor files a recommendation with the board after an informal review, the board must use it in weighing the evidence (§ 441.30(2)-(3)), but you still file the protest yourself.

My equalization notice came in October. Is that a separate protest?

Yes. In odd-numbered years the Department of Revenue may order class-wide changes. A protest of that order runs October 9 through October 31, or through November 4 if the Department of Revenue approved an alternative method for your jurisdiction, and the board cannot cut your value by more than the order added (§ 441.49(4); Iowa Administrative Code r. 701—102.16(3)). PAAB’s appeal page lists the appeal from that session as due “within 20 calendar days of the board of review’s adjournment date,” but its equalization page says appeals “must be filed within 20 days of the date of the board of review’s decision.” To be safe, count the 20 days from the date of the decision.

My value jumped more than 10 percent this year. Does the assessor have to prove it?

Not for 2026. The SF 2472 shift applies to residential assessment years beginning on or after January 1, 2027. For 2026 and earlier the burden starts with you and moves once you offer competent evidence of a different market value (§ 441.21(3)).