Every escrowed Indiana mortgage obligates its servicer to do two things per parcel, twice a year: know the installment amount, and pay it on time. At portfolio scale that means tracking tax data across 92 independent county treasurer systems with no statewide billing feed — and, starting with the 2026 cycle, projecting bills through a multi-year reform that changes the homestead math every single year into 2031. Here is the data model, where the data lives, and why the projection problem just got harder.
The Per-Parcel Record a Servicer Needs
| Field | Why it matters |
|---|---|
| 18-digit state parcel number | The join key across every county and state system — format decoded here |
| County + taxing district | Determines the rate and which treasurer gets paid |
| Spring and fall installment amounts | The numbers escrow analysis must fund |
| Due dates and paid status | Two statutory dates, but weekend shifts move them (see below) |
| Delinquency status and penalties | Unpaid taxes accrue penalties and eventually feed tax sale certification — a lien senior to the mortgage |
| Cap tier and deduction/credit set | Homestead vs. 2% vs. 3% cap, plus the deductions that determine taxable value — the inputs to any forward projection |
Loan-level records keyed on address alone fail routinely — addresses change, split, and format inconsistently across counties. The parcel number is the identifier that survives.
Where the Data Lives
There is no single state system that serves bill amounts and payment status. The landscape, mapped fully in our Indiana property tax software guide:
- County treasurer and billing systems hold installment amounts, due dates, and paid/delinquent status — 92 of them, on different payment platforms, produced by the same assessment-to-billing pipeline everywhere but exposed through incompatible portals.
- County assessor systems hold assessed values, deductions, and record cards, on a patchwork of CAMA vendors and public portals.
- State systems — Gateway for levies and budgets, the DLGF's transparency portal for bill components — explain the rate side but do not report payment status.
Tax-service operations historically solved this with per-county lookups and file exchanges. The modern alternative is consuming normalized parcel data programmatically: our data API serves parcel-level records across all 92 counties keyed on the state parcel number, with property lookup for one-off research — and the build-vs-scrape economics favor the API well before portfolio scale.
Why May 10 / November 10 Shapes Escrow Analysis
Indiana bills annually in two installments, due May 10 and November 10, shifted when the date falls on a weekend — per the DLGF, the 2026 dates are May 11 and November 10. Two consequences for servicers:
- Concentrated disbursement risk. The entire Indiana book disburses twice a year on the same two dates. A missed installment accrues a 5% penalty if paid within 30 days (with no prior delinquency on the parcel), 10% after that — and penalties on escrowed loans are typically the servicer's problem.
- A long gap between the November payment and the next spring's bill. Escrow cushions set in an annual analysis meet the following May's bill only if the projection was right — which is exactly what the current reform disrupts. The state has studied a monthly payment option (SEA 163), but two installments remain the law.
The SB 1 Problem: Last Year's Bill Is a Bad Predictor
Escrow projections that extrapolate the prior bill now embed a structural error, because Senate Enrolled Act 1 (2025) rebuilt the homestead deduction on a six-year schedule. Verified against the DLGF's June 2025 memo on SEA 1 (and tabulated in full in our phase-in schedule post): the standard homestead deduction steps down from $48,000 (pay-2026) to $40,000, $30,000, $20,000, $10,000, then $0 by pay-2031, while the supplemental deduction rises 40% → 46% → 52% → 57% → 62% → 66.7% over the same pay years. Taxable value therefore changes every year even when assessed value is flat — falling for higher-value homesteads, rising for modest ones.
Stacked on top:
- The supplemental homestead credit — the lesser of 10% of the homestead's liability or $300, excluding referendum taxes — comes off the bill after the rate applies, starting with pay-2026.
- The separate mortgage deduction is gone, folded into the homestead deduction — a mapping issue for any servicer data model that still carries it as a field.
- Non-homestead residential parcels (investor loans) get their own phased deduction, 6% of AV in pay-2026 rising to 33.4% by pay-2031.
- Circuit-breaker caps still bound everything at 1%/2%/3% of gross AV.
Warning
A projection engine that grows last year's bill by a flat percentage will misfund Indiana escrow accounts in both directions through 2031. The deduction schedule is deterministic and public — build it in, per parcel, using the actual cap class and deduction set rather than a uniform assumption. Borrower-facing context for the resulting payment changes: how SEA 1 hits escrowed mortgage payments.
Tip
Delinquency monitoring deserves the same rigor as bill amounts. Indiana treasurers certify chronically delinquent parcels to annual tax sales, and redemption-period mechanics move fast for a lienholder — the tax sale process guide covers the timeline a servicer's loss-mitigation team needs.