Most of the attention on SEA 1 has gone to homeowner relief and local budget squeezes. But tucked into the same act is one of the biggest changes to Indiana school finance in a generation: beginning in 2028, school districts across the state — not just in four pilot counties — must share part of their property tax revenue with charter schools that educate their resident students.
Districts call it a revenue loss they cannot absorb. Charter advocates call it students' money finally following students. Both descriptions are doing work; here is what the law actually does, statewide. (For the Marion County governance fight this set off — the IPEC board and the IPS-charter rebalancing — see our separate deep dive on property tax sharing inside IPS. This piece is the statewide picture.)
From four-county pilot to statewide rule
Indiana has been experimenting with charter sharing since HEA 1001-2023, which required districts in Lake, Marion, St. Joseph, and Vanderburgh counties to share growth in operations-fund property tax revenue with charters. The DLGF's June 2025 implementation memo details how SEA 1 amended that pilot (which runs through 2027) and — via a new section of the school finance code — extended its core provisions statewide beginning with distributions in calendar year 2028.
The pilot's formula, which the statewide version builds on, is a three-step:
- Set a base: the district's average operations-fund collections from 2021-2023
- Find the increment: current-year operations-fund collections minus that base — i.e., the growth in the levy
- Split the increment between the district and eligible charters according to each entity's share of students with legal settlement in the district, as calculated by the Department of Education
The county auditor distributes the charter share directly at the June and December settlements. The money never passes through the district's hands.
Who has to share, and who gets paid
The trigger. Per reporting from Chalkbeat Indiana and Mirror Indy, the statewide requirement applies to districts where more than 100 resident students and more than 2 percent of the district's enrollment attend eligible charter schools. Districts below the threshold share nothing. WFYI's analysis put the affected count at about 30 school districts — overwhelmingly urban and inner-suburban systems where charter sectors are large.
The exclusions. Not every charter collects. Virtual charter schools and adult high schools are ineligible for any distribution. The law also added an accountability gate during the pilot years: a charter must adopt a public budget by October 15, present it publicly beforehand, and file it with its authorizer and the DLGF through Gateway with an attestation — or its distribution is withheld and redistributed.
The funds. Sharing applies to the operations fund — the property tax levy that pays for transportation, building maintenance, utilities, and capital projects. The state-funded education fund (the primary source for teacher salaries) is not property tax and is untouched by this mechanism, and debt service levies for existing bonds are not part of the operations-fund sharing formula. Critically, though, SEA 1 also reaches operating referendum revenue: districts that pass operating referendums must share the proceeds with eligible charters once they cross the enrollment threshold — a sea change for how districts price their referendum asks.
The phase-in: 2028 to 2031
The statewide obligation ramps over four years, mirroring the deduction phase-ins elsewhere in SEA 1:
| Distribution year | Share of the full formula amount charters receive |
|---|---|
| 2028 | 25% |
| 2029 | 50% |
| 2030 | 75% |
| 2031 | 100% |
The first-year statewide total — roughly $4.7 million — is small precisely because of the 25 percent phase-in and because the formula shares levy growth over the base years, not the whole levy. The number compounds from there: The Mind Trust estimated charters serving students living within IPS boundaries could see roughly $2,050 per student in 2028 (assuming a new IPS operating referendum), growing to roughly an additional $3,750 per charter student by 2031.
Which districts feel it most
The formula's design concentrates impact in a recognizable profile:
- Urban districts with large charter sectors. The student-share formula means a district where a quarter of resident students attend charters eventually shares roughly a quarter of its incremental operations revenue. Indianapolis Public Schools is the extreme case — LSA projected IPS losses near $14 million from 2026-2028, and IPS officials project more than $96 million through 2032 from SEA 1's combined changes — which is why Marion County got its own governance structure and political fight.
- Districts already squeezed by circuit breaker losses. Sharing comes off the top of operations revenue in districts that, like IPS and other cap-exposed systems, already lose substantial levy dollars to the 1-2-3 percent caps.
- Growing suburban districts near charter hubs. A fast-growing district with rising operations collections generates a bigger "increment" — the very thing the formula splits. Districts with flat or declining levies share little, because there is little growth above the 2021-2023 base.
Rural districts mostly do not feel this directly: few clear the 100-student-and-2-percent bar. Their SEA 1 pain runs through levy controls and deduction-driven base erosion instead. Statewide, LSA estimated Indiana's public school districts lose about $744 million across the first three years of SEA 1's property tax changes as a whole — charter sharing is one slice of that, not the bulk.
Note
Keep the two effects distinct. Most of districts' SEA 1 revenue loss comes from homestead deductions shrinking the taxable base for everyone. Charter sharing does not shrink the pie — it reallocates a growing slice of it from district operations budgets to charter operations budgets. Districts experience both at once, which is why the numbers in superintendents' presentations look so stark.
What it means for referendums
The referendum implications may end up mattering more than the base formula, for three reasons:
- Asks get grossed up. A threshold district that needs, say, an additional $10 million a year for its own operations must now ask voters for enough that its post-sharing share covers the need. Expect referendum rates pitched to voters from 2026 onward to bake in the charter share — and expect opponents to campaign on exactly that.
- The pitch changes. "Funds our district's buses and buildings" becomes "funds public school students who live here, wherever they attend." Some districts will embrace that framing; others will shelve referendum plans rather than share. The May 2026 referendum results were the first test of voter appetite in the new environment.
- Timing games are real. Because sharing of the base formula phases in starting 2028 and referendum sharing attaches at the threshold, district CFOs are openly modeling whether to go to the ballot sooner or later. Watch for a wave of carefully timed asks around the phase-in steps.
Warning
For school boards in threshold districts: the referendum sharing rules apply to operating referendums, and the 2021-2023 base means your operations levy growth — including referendum-driven growth — is what gets split. Model the charter share at full 2031 phase-in before setting a rate, not at the 25 percent first-year level. An ask sized to 2028's sharing percentage will be underwater by 2031.
What it means for your tax bill
Here is the part homeowners consistently get wrong: charter sharing does not raise your property taxes. The formula reallocates revenue after collection — your bill is set by levies, rates, deductions, and caps exactly as before. A district sharing $2 million with charters does not levy $2 million more; it keeps $2 million less.
The indirect path is where your bill can move:
- Bigger or more frequent referendum asks. If your district grosses up its next operating referendum to offset sharing, and voters approve it, your bill rises — referendum levies sit outside the circuit breaker caps, so they hit in full.
- Service-versus-tax tradeoffs. Districts that absorb the loss instead may cut transportation or defer maintenance — costs that have a way of returning as future capital referendums.
- Where your school dollars go. The school share is typically the largest slice of an Indiana tax bill. From 2028, a piece of that slice in roughly 30 districts follows resident students to charters. You can see exactly what share of your own bill goes to your school district through the property lookup and our guide to reading an Indiana tax bill.
The bottom line
SEA 1 turned a four-county experiment into the statewide default: where more than 100 resident students and more than 2 percent of enrollment attend charters, growth in school operations and operating-referendum property taxes gets split by student share, phasing from 25 percent in 2028 to full sharing in 2031, with virtual charters and adult high schools excluded. It is a reallocation, not a tax increase — but it reshapes referendum math in every threshold district, and referendums are how school finance reaches your bill. The districts to watch are urban systems with big charter sectors; the season to watch is every ballot from now through 2031.