Buried in every Indiana closing packet is a form most buyers sign without reading: the Sales Disclosure Form (SDF), State Form 46021. It costs $20 to file, takes a few minutes at closing, and then quietly does three consequential things: it feeds the price into the state's assessment system, it can serve as your homestead deduction application, and it becomes part of the comparable-sales record that you — or your neighbors — may one day use in an appeal.
Here's what the form actually is and why it deserves two minutes of your attention.
When an SDF Is Required
Indiana law requires a sales disclosure form whenever a conveyance document — a deed, a recorded land contract, and similar instruments — is filed with the county. The workflow is fixed:
- The parties complete the SDF (in most counties through the state's online SDF system, printed and signed).
- The county assessor reviews it for completeness and stamps it as eligible for filing.
- The county auditor collects the fee, processes the transfer on the tax rolls, and only then can the deed be recorded.
The auditor may not accept a conveyance without a complete, assessor-stamped SDF. In other words: no SDF, no recorded deed. One form covers one parcel, with a single exception — contiguous parcels in the same taxing district conveyed by a single deed can share a form.
The $20 Fee — and Who's Exempt
The standard filing fee is $20, paid to the county auditor. Some transfers must still file the form but owe no fee, including:
- Compulsory transfers — foreclosure, divorce, court order, condemnation, probate
- Transfers to charities, nonprofits, or governments
- Partitions of land between existing co-owners
If your transfer is a plain-vanilla sale, budget the $20 into closing costs and move on; it typically appears as a line item on the settlement statement.
The Part Buyers Should Care About: It's Your Homestead Application
For years, the SDF has doubled as the application for key property tax benefits — most importantly the homestead standard deduction. The form asks whether the property will be the buyer's primary residence; answering correctly and completely means the deduction should attach without a separate trip to the auditor's office.
Warning
"Should" is doing work in that sentence. The single most common cause of a shockingly high first tax bill for a new homeowner is a homestead deduction that never attached — because the SDF question was skipped, answered wrong, or lost in processing. After closing, verify the deduction actually landed. Our guides on the homestead exemption and the new-homeowner $300 credit cover what to check and when.
The reverse matters too: the SDF data trail is one of the ways counties flag ineligible homesteads — when you buy a new primary residence, the system knows the old one stopped being your homestead.
What the State Does With Your Sales Price
The SDF is the raw material of Indiana's assessment machinery:
- Ratio studies. The DLGF validates each county's assessments annually by comparing assessed values against actual SDF sale prices. Whether your county's assessments get approved — and whether values get trended up — runs through this data.
- Trending. Annual adjustments to assessed values are calibrated against local sales, which come from SDFs.
- Comparable sales. When you appeal an assessment with comps, the sale data behind those comps traces back to disclosure filings. The state's research arm also publishes SDF-derived data through STATS Indiana.
This is why accuracy matters beyond your own file. A sale recorded with the wrong price, or a non-arm's-length family transfer not marked as such, pollutes the comp pool for the whole neighborhood — including any comparable-sales appeal you might later file.
Common Mistakes
| Mistake | Consequence |
|---|---|
| Skipping the primary-residence question | Homestead deduction never attaches; first bill computed at non-homestead rates |
| Not disclosing personal property or seller concessions in the price | Inflated "sale price" becomes a bad comp — sometimes against your own future appeal |
| Failing to mark a family or estate transfer as non-arm's-length | Below-market price skews neighborhood ratio data |
| Assuming the title company handled the deduction boxes | Nobody at the table owns the answer unless you check it |
Indiana law backs the form with penalties for failing to file and for falsification, so treat the price and terms fields as the legal statements they are.
After Closing: Verify
Within a few weeks of recording, your parcel's ownership should update, and by the following January 1 assessment date the homestead should be reflected. Check both in our property lookup or the Indiana property explorer — ownership, deductions, and the assessment itself. If the deduction is missing, contact the county auditor before bills go out; if the first assessment of your new home looks wrong, that's what the appeal process is for.