How Iowa Tax Lien Sales Work: Bidding, Redemption, and Deeds

Iowa tax lien sales take place on the third Monday in June each year, when county treasurers auction the right to pay off delinquent property taxes in exchange for a lien against the property.¹ Winning bidders receive a tax sale certificate, not a deed. That certificate earns 2% interest per month until the owner redeems, or until the investor claims the property through a separate deed process governed by strict notice rules and deadlines.²

When and Where the Sales Happen

Every Iowa county treasurer holds the annual tax sale on the third Monday in June.¹ If good cause prevents the treasurer from holding the sale that day, it can be rescheduled to another date in June. The sale covers every parcel with delinquent taxes, and the amount owed includes taxes, interest, fees, and costs.

Format varies. Some counties still run in-person auctions. Many now use online platforms such as GovEase or Iowa Tax Auction, so check with your target county before the sale.

Registering and Preparing to Bid

Before you can bid, you need to register with the county treasurer. Registration generally requires the county’s official form and a W-9 for tax reporting.³ Bidding as a business entity means producing a federal tax identification number and either a designation of agent for service of process filed with the Iowa Secretary of State or a verified trade name filed with the county recorder.

Each county charges a registration fee. State law lets treasurers set a “reasonable” fee, with the total collected capped at the cost of running the sale.⁴ In practice, fees range from around $25 to $60 or more. Registration deadlines vary too, so look them up well before the sale.

Counties publish the delinquent tax list in local newspapers and online. The list shows each parcel, the amount owed, and the legal description. Study it beforehand to identify parcels worth bidding on.

How the Auction Works

Iowa uses a “bid-down” auction. Every parcel starts at 100% undivided interest, and bidders compete by offering to accept a smaller percentage of the property in return for paying the full tax bill.⁴ The bidder willing to accept the smallest percentage wins. Bids drop in whole percentage points, with a floor of 1%.⁵ When bidders tie at the lowest percentage, the treasurer picks the winner through a random selection process.

The percentage matters if you eventually take a deed. A winning bid of 100% means the deed conveys the whole property. A bid of 60% means you’d end up owning a 60% undivided interest alongside the original owner. For that reason, many experienced investors try to stay at or near 100%. In practice, plenty of parcels draw only one bidder, so the certificate sells at 100% with no bidding down at all.

Payment is due at the time of purchase. Accepted methods vary by county and may include personal checks, certified funds, money orders, or electronic transfers.⁵ If you fail to pay by the end of the sale, the parcel is re-offered and you may be barred from bidding on it again.

What the Certificate Gives You

A tax sale certificate is a financial instrument, not a deed. It gives you a legal lien against the property for the amount you paid. It does not transfer ownership, and it does not let you enter, occupy, or use the property. The owner keeps full possession throughout the redemption period.

The certificate gives you two things: the right to be paid back with interest if the owner redeems, or the right to pursue a deed through the statutory process if they don’t. Think of it as a secured loan to the owner, backed by the property itself.

You can also protect your position by paying any new delinquent taxes that come due on the same parcel after the sale. Those subsequent payments get added to your lien and earn the same 2% monthly interest.⁶ Skipping them lets another investor buy a newer lien on the property.

Interest and Redemption

The statutory interest rate is 2% per month, with any partial month counted as a full month.² That rate applies to both the original purchase amount and any subsequent tax payments. The minimum interest charge is one dollar, rounded to the nearest whole dollar.

To redeem, the owner must pay the treasurer the full original sale amount, the certificate fee, every subsequent tax payment the investor made, and the accumulated 2% monthly interest on each component, plus a $20 redemption fee.⁷ Iowa law does not allow partial redemption. The owner must pay everything in a single transaction.

Payment timing matters. The redemption must reach the treasurer on or before the last day of the month to avoid another month of interest. If that last day falls on a weekend or holiday, the deadline extends to the close of business on the next business day.²

Deadlines That Can Wipe Out Your Investment

For a regular tax sale, the redemption period runs one year and nine months from the date of sale. After that, the certificate holder can start the process of taking the property by serving a formal 90-day notice telling the owner and all interested parties that the right to redeem will expire in 90 days and a deed will issue unless they pay.⁸

Service has to reach the person in possession and the person in whose name the property is taxed. On top of that, the notice must go by both regular and certified mail to any mortgage holder, anyone holding a recorded contract of sale, any lessor with a recorded lease, and anyone else with a recorded interest in the property.⁸ Getting service wrong can void the entire process, so many certificate holders hire an attorney or title service for this step.

An affidavit of service must then be filed with the county treasurer to start the 90-day clock. Here is the deadline that catches investors off guard: if you don’t file that affidavit within three years of the tax sale, the treasurer cancels your certificate. You forfeit your original purchase, every subsequent tax payment, and all accrued interest, with no refund.⁹ This is the single most punishing trap in the system.

A second deadline follows. After the 90-day redemption period expires without payment, you have 90 calendar days to return the certificate and pay the deed fees. Miss that window and the treasurer cancels your certificate.¹⁰

Getting the Deed and Clearing Title

If nobody redeems within the 90 days after notice is served, you can request a tax deed from the treasurer. You return the original certificate and pay a $25 deed issuance fee plus the recording fee, which runs $7 for the first page and $5 per additional page.¹⁰ The treasurer records the deed with the county recorder before delivering it to you. The treasurer may include several parcels purchased by the same person on a single deed, which keeps costs down for investors holding multiple certificates.

Receiving the deed transfers legal title, but most title insurers won’t cover tax-sale property without more. The usual next step is a quiet title action, a court proceeding that confirms your ownership and extinguishes competing claims. The petition must contain an accurate legal description of the parcel. Iowa courts have held that an incorrect description “substantially changes the issues” and defeats the proceeding’s notice requirements, which can get the case dismissed.

The former owner and anyone else with a potential claim has a limited window to challenge the deed. An action to recover property sold for nonpayment of taxes must be brought within three years of the deed’s execution and recording.¹¹ After that, attacking the deed is much harder. Quiet title actions involve attorney fees and court costs that can run into the thousands, which belongs in any investment calculation.

What Gets Wiped Out, and What Survives

Property tax liens in Iowa hold priority over other claims on the property, including mortgages. When a tax deed is issued, it effectively wipes out any mortgage recorded against the property. That priority is why the 90-day notice must reach mortgage holders. They have the right to redeem the certificate themselves to protect their security, and lenders typically act when they receive that notice.

Federal tax liens are different. The IRS recognizes that state and local property tax liens generally hold superpriority over a previously filed federal tax lien, provided state law gives property taxes priority over existing security interests.¹² Federal tax liens can still survive nonjudicial sales unless specific notice requirements are met. If a target property carries a federal tax lien, talk to a tax attorney before assuming the deed will clear it.

Risks Worth Weighing

The 2% monthly interest rate looks attractive, but most certificates get redeemed, often within the first few months. The owner pays, you get your money back with interest, and the matter closes. Annualized returns can be strong, but the holding period is unpredictable and outside your control.

The real risk sits on parcels that don’t redeem. A property nobody wants to redeem is often a property nobody wants: vacant lots, contaminated land, buildings with code violations, or parcels with title defects that survived the tax sale. If you take a deed on one of these, you inherit the problems, including possible environmental liability and demolition obligations. You’ll also pay for the 90-day notice service, the quiet title action, and ongoing property taxes before you can sell or use the property.

Procedural risk is just as serious. Missing the three-year window to file your affidavit of service means automatic cancellation with no refund.⁹ Missing the 90-day window to return the certificate and pay the deed fee also kills the certificate.¹⁰ Sloppy service of the 90-day notice can invalidate everything. Iowa’s tax sale system rewards investors who track dates and follow procedure, and punishes those who don’t.

1
Iowa Legislature. Iowa Code 446.7 – Annual Tax Sale
2
Iowa Legislature. Iowa Code 447.1 – Redemption, Terms
3
Marion County Treasurer. Notice to Tax Sale Purchasers of the Terms and Conditions Governing the Annual Tax Sale
4
Iowa Legislature. Iowa Code 446.16 – Bid, Purchaser, Bidder Registration Fee
5
Hardin County. Tax Sale Terms
6
Iowa Legislature. Iowa Code 446.32 – Payment of Subsequent Taxes by Purchaser
7
Iowa County Treasurers Association. Property Tax Frequently Asked Questions
8
Iowa Legislature. Iowa Code 447.9 – Notice of Expiration of Right of Redemption, County Right of Redemption
9
Iowa Legislature. Iowa Code 446.37 – Cancellation of Sale
10
Iowa Legislature. Iowa Code 448.1 – Return of Certificate of Purchase, Execution of Deed, Fees
11
Iowa Legislature. Iowa Code 448.12 – Limitation of Actions
12
Internal Revenue Service. Federal Tax Liens