Every fall, Indiana's 92 counties sell tax-delinquent properties at public auction under Indiana Code 6-1.1-24 and 6-1.1-25. The auctions are one of the few investment vehicles in the state where the statutory return — a guaranteed 10% per annum minimum if the property is redeemed — is set in law rather than negotiated. For investors who understand the process, tax sales offer two distinct exit paths: collect the redemption interest, or eventually take the deed.
This guide walks through the entire Indiana tax sale process from delinquency to deed: how a parcel ends up on the sale list, the difference between certificate sales and commissioner's sales, what you actually buy at auction, the 1-year redemption clock, the surplus interest mechanics, and the practical risks (title clouds, occupants, environmental liabilities) that the statutory return doesn't compensate for.
How a Property Ends Up on the Sale List
A parcel becomes eligible for tax sale when property taxes remain unpaid for at least 15 months — typically meaning the May installment from the prior year is still unpaid by August of the current year, plus the May installment from the current year is also unpaid.
Counties build the sale list each summer. The treasurer publishes a notice in a local newspaper for three consecutive weeks before the sale, and certified mail goes to the property owner and any recorded lienholder of record. If you want a head start, the DLGF maintains links to county tax sale lists on its website each August and September.
The most common reasons a property lands on the list:
- Owner died and the estate hasn't been settled
- Vacant land where the owner forgot the parcel exists or is paying taxes on the wrong account
- Investor walked away from a marginal rental
- Inherited property nobody wants the responsibility of paying on
- Genuine financial distress (less common — the high-equity properties usually refinance or sell first)
Two Types of Sales
Indiana runs two kinds of tax sales, and the distinction matters because they confer very different rights.
1. Certificate Sale (the Annual Fall Auction)
This is the standard sale held by every county, typically between August and October. You bid on a tax sale certificate that gives you:
- A lien against the property for the delinquent taxes plus your bid premium
- The right to receive 10% per annum minimum on the entire amount if the owner redeems within one year
- The right to apply for a tax deed if the owner does not redeem within one year
You do not get the property at the auction. You get a piece of paper that may, eventually, lead to a property — or, more often, leads to a check from a redeeming owner.
2. Commissioner's Sale (the Repeat-Offender Auction)
Properties that went through certificate sale and were not redeemed and not deeded within the statutory window roll into a commissioner's sale, typically held in spring. These properties are sold subject to a shortened 120-day redemption period rather than the standard year. Bids start lower (often just at the back-tax minimum), but title risks tend to be higher because these are the parcels nobody wanted at the certificate sale.
| Sale type | Timing | Redemption period | Minimum bid |
|---|---|---|---|
| Certificate sale | Aug–Oct | 1 year | Delinquent taxes + costs |
| Commissioner's sale | Spring | 120 days | Often just back taxes |
What You Pay at Auction
The minimum bid is the sum of:
- Delinquent taxes (years prior + current year if applicable)
- Penalties and interest accrued
- Sale costs (publication, certified mail, administrative fees)
Above the minimum, bidders compete on bid premium — the amount above the minimum you're willing to pay for the certificate. The premium serves no purpose other than out-bidding other investors; you do not earn the 10% interest on the bid premium, only on the minimum bid amount.
This creates an important mental model: every dollar of premium is a dollar at risk. If the owner redeems, you get your premium back without interest. If the owner doesn't redeem and you take the deed, you get the property for the full bid amount. A high premium is essentially an interest-free loan to the county for one year.
The 1-Year Redemption Clock
After the certificate sale, the property owner has one year from the sale date to redeem. To redeem, they pay the county treasurer:
- The full minimum bid amount
- Any premium you paid above the minimum
- 10% per annum on the minimum bid amount (calculated daily, not compounded)
- Subsequent taxes you've paid during the redemption period (with 5% per annum interest)
- Title search costs and your attorney fees if you've initiated the deed application
The county sends you a redemption check within 30 days of the owner's payment. The certificate is canceled, and the lien is extinguished. You're done.
The 10% rate is a minimum in Indiana; counties cannot legally pay less. The actual return is often higher because the interest accrues on the full minimum bid from sale date — even if redemption happens 11 months later, you collect a full year's worth of interest minus a few days.
What Happens If the Owner Doesn't Redeem
If the redemption period expires without payment, you have approximately three months to file a petition for tax deed with the county auditor. This requires:
- A title search identifying every party with a recorded interest in the property (mortgagees, judgment holders, easement holders, heirs)
- Statutory notice sent by certified mail to every such party, plus publication if a party can't be located
- A waiting period for objections
- A formal tax deed application filed with the auditor
Once the auditor issues the deed (Form 137B), you own the property — but the title is a tax deed, not a warranty deed. You'll typically need a quiet title action in court to clean up the chain before a title insurer will write a policy. Quiet title costs $1,500–$5,000 and takes 60–180 days depending on the county and the complexity of the recorded interests.
The Real Returns
The advertised "10% guaranteed return" is technically true but practically misleading. The actual realized return on a portfolio of certificates depends on the redemption rate and the time-to-redemption distribution.
In a typical Indiana county, roughly 85–95% of certificates redeem within the first year. Most redemptions happen in the last 60 days before the deadline as owners scramble. The realized return on the redemption pool is roughly:
- 10% APR on minimum bid amount
- 0% APR on any premium paid
- Net: depends entirely on premium-to-minimum ratio
For the 5–15% of certificates that don't redeem, you take the deed — but you also bear the title clean-up cost, occupant removal cost (Indiana eviction law applies), and any deferred maintenance or environmental issue the property carries.
The Practical Risks the 10% Doesn't Cover
The statutory return is for the time-value of money. It is not a hazard premium. Real risks investors absorb:
Title Clouds
Older parcels accumulate easements, judgment liens, federal tax liens, mineral rights conveyances, and probate complications. A federal tax lien (IRS) survives a tax sale and continues to encumber the property. Some states extinguish such liens at tax sale; Indiana does not for IRS liens specifically.
Occupants
The property may have tenants — sometimes tenants paying rent to the delinquent owner who didn't pay taxes. You can evict, but it takes time and the eviction process follows standard landlord-tenant timelines (typically 30–60 days). Cash-for-keys is often the fastest exit.
Environmental Liability
Brownfield parcels — old gas stations, dry cleaners, industrial sites — sometimes appear on tax sale lists precisely because the cleanup cost exceeds the property value. Federal CERCLA liability can attach to the new owner. Always research environmental records (state DEM, EPA Envirofacts) before bidding on any commercial or industrial parcel.
Structural Condition
You typically cannot inspect the interior before the sale. A house listed at $50,000 AV might be a teardown. Drive every property on your shortlist before bidding.
Never bid on a tax sale property sight-unseen. The bid premium is a sunk cost on properties that turn out to be uninhabitable, environmentally contaminated, or occupied by adversarial tenants.
Pre-Sale Research Checklist
For every property on your shortlist:
- Pull the parcel record from AribaTax Property Lookup — current AV, assessment history, comparable sales
- Check the property class code — homestead, rental, commercial, vacant — to estimate exit value
- Pull the recorded title from the county recorder's office; identify every lienholder
- Drive the property; photograph it
- Search environmental databases for any flag
- Identify the owner via county records; if deceased, check probate court for an open estate
- Estimate quiet title cost specific to the title chain
Counties Worth Watching
Tax sale dynamics vary widely by county. Higher-population counties have larger lists and more competition; rural counties have fewer parcels but often less bidder competition and better deed-conversion economics.
- Marion County — Indianapolis, the largest annual list in the state
- Lake County — significant industrial parcels, post-deindustrialization restructuring
- Allen County — Fort Wayne, mid-sized list, moderate competition
- St. Joseph County — South Bend, steady volume
- Vanderburgh County — Evansville
- Vigo County — Terre Haute, smaller competitive field