Jackson County — Seymour, Brownstown, Crothersville, and the I-65 corridor between them — is one of southern Indiana's working manufacturing counties. The local tax base is a mix of single-family residential clustered around Seymour, a meaningful industrial concentration along the interstate, active farmland through the southern townships, and the small-town residential cores that hold the rest of the county together. The 2026 Form 11 notices arrive in mid-April against the same statewide DLGF cost-table reset pushing AVs upward across Indiana, but Jackson's industrial-heavy mix produces a 2026 picture that's neither rural-quiet nor urban-volatile.
The appeal deadline is June 15, 2026, or 45 days from the mailing date — whichever is later. Jackson County property tax due dates for 2025 pay 2026 are May 11, 2026 and November 10, 2026.
Jackson County Assessor: 111 S. Main Street, Suite 116, Brownstown, IN 47220. Note: the county seat is Brownstown, not Seymour — file Form 130 in Brownstown despite Seymour being the population center. Form 11 notices typically arrive in the middle of April.
What's Driving 2026 Jackson County AVs
Three local dynamics shape the cycle.
The DLGF Cost-Table Reset
The statewide cost-table update — the same one driving the 12% statewide AV growth in the prior cycle — affects every county. Jackson's residential housing stock in Seymour, Brownstown, and the smaller towns will see across-the-board improvement-value movement, with the largest percentage swings on older properties.
The Industrial Corridor
The I-65 manufacturing concentration is one of Jackson County's largest tax-base contributors. Industrial property valuations don't move on the same cost-table cycle as residential — they involve specialized cost schedules, machinery and equipment considerations, and (where applicable) abatement schedules that phase in or phase out over multi-year horizons. Owners of C&I parcels along the corridor should review the AV change carefully and compare it against the property's actual operating economics.
Active Farmland
Outside the towns and the industrial belt, Jackson County is meaningful farm country. The 2026 farmland base rate is $2,120 per acre — unchanged from 2025 — but individual parcel AVs still move based on productivity, soil composition, and influence factors.
What to Check on Your Jackson County Form 11
The general Form 11 walkthrough applies. Jackson-specific items to verify:
Property Class Code
Verify Line 5. The class code determines the cap tier: 1% homestead, 2% other residential and farmland, 3% commercial. Mixed-use rural parcels — a residence on actively farmed land — frequently get miscoded. So do former rentals that have converted to homestead use without the corresponding paperwork.
Homestead and SB 1 Credit
If you bought in 2025, you must have filed Form HC-10 to claim the homestead deduction. Without it, you lose the $48,000 deduction, the supplemental homestead deduction (now 40% in 2026), and the SB 1 $300 credit on the spring 2026 bill. Fix this with the auditor before May 11.
Improvement Value on Older Stock
Seymour and Brownstown both have meaningful pre-1970 housing stock. The DLGF cost-table reset can push improvement values higher than the property would actually trade for — particularly where condition has deteriorated. Documented condition issues are appeal-worthy evidence.
Industrial Personal Property
The business personal property exemption rises to $1M in 2026 (and $2M in 2027) under SB 1. Owners of small industrial or commercial operations along the I-65 corridor should verify they're getting the new threshold applied correctly. The exemption is claimed via Form 104.
Jackson County Tax Rate Context
Jackson County's combined tax rates run modestly below the statewide median. The industrial tax base absorbs meaningful levy without pushing residential rates to the upper tier.
For appeal economics: a $10,000 AV reduction translates to roughly $150–$220 of annual tax savings for non-cap-bound parcels. Run the cap math from the appeal guide before assuming an appeal will move your bill.
The Seymour, Brownstown, Crothersville Picture
| Area | Character | 2026 considerations |
|---|---|---|
| Seymour (city) | Population center, dense SFR, downtown, schools | Cost-table moves on older improvements |
| Brownstown | County seat, smaller residential, government | Modest moves; cost-table-driven |
| Crothersville | Small-town residential | Modest moves |
| I-65 industrial corridor | Manufacturing, logistics, distribution | Specialized C&I cost schedules; abatement considerations |
| Rural townships | Ag, rural residential | Farmland base rate drives Ag AV |
Comparable-sales work in Jackson County must respect these submarket lines. A Seymour subdivision sale doesn't defend a Crothersville AV, and a corridor industrial comparable doesn't defend a downtown-Seymour retail parcel.
SB 1 and the 2026 Spring Bill
The reform package signed in 2025 takes effect on the spring 2026 tax bill (due May 11 in Jackson):
- 10% supplemental homestead credit, capped at $300 per qualifying homestead.
- Supplemental homestead deduction increases from 35% to 40% of eligible AV.
- Business personal property exemption rises to $1M in 2026 (and $2M in 2027).
Walkthrough in the SB 1 explainer.
Jackson County Appeal Logistics
Where to File
Form 130 is filed with the Jackson County Assessor's Office in Brownstown — not in Seymour, despite Seymour being the population center. Hand-delivery and mail are both accepted; appeals are time-stamped on receipt, not postmark. Confirm online filing availability before relying on it.
What to Include
- Completed Form 130 (one per parcel)
- Stated grounds: market value, assessment error, or uniformity
- 3–5 comparable sales within the same neighborhood code
- Photos for condition-based arguments
- For income property: rent roll and operating statement
- For industrial property: operating data, machinery and equipment schedule, and abatement documentation if applicable
After Filing
PTABOA acknowledges within 30 days. Settlement offers commonly arrive 60–90 days after filing if written evidence supports a reduction. Hearings, if needed, schedule out further. Post-decision, the Indiana Board of Tax Review is the escalation within 30 days.
The Industrial Tax Base and What It Means for Residential
Jackson County residential owners benefit indirectly from the industrial concentration along I-65: a larger commercial/industrial tax base means levy is spread over more parcels, which keeps residential rates lower than they would be in a pure-residential county. The flip side is that any major industrial closure or abatement expansion shifts levy back onto residential and small commercial. This is worth keeping in mind when reading multi-year tax rate trends.
Decide Early
The optimal Jackson County filing window is late April through late May: Form 11 in hand, well before the June deadline, and time to pull supporting documents and engage with the assessor's staff.
If you'd rather not assemble the package yourself, Property Lookup compares your parcel to recent sales, and Tax Appeal Automation builds the Form 130 evidence file on contingency.
Find Your Jackson County Property
- Jackson County overview
- Jackson residential parcel data
- Jackson commercial parcel data
- Jackson industrial parcel data
- Jackson agricultural parcel data