Ohio Suspends Data Center Tax Break After Costs Blow Past Projections by 11x

Ohio quietly became one of the most important stress tests for the data center subsidy model this week, and it failed in a fairly public way.

Gov. Mike DeWine directed the Ohio Tax Credit Authority to stop accepting new applications for the state's data center sales-tax exemption after its June 1 meeting, according to reporting by Bloomberg and the Associated Press. The pause is not a permanent ban. DeWine framed it as a timeout while a legislative committee reviews the program's actual costs and community impact. But the numbers behind the decision make the word "pause" feel generous.

The state had projected the exemption would cost $136 million in fiscal 2025 and $142 million in fiscal 2026. According to figures the state itself reported, as reviewed in the Associated Press's coverage, the actual tab was $554 million in 2024 and nearly $1.6 billion in 2025. That is roughly an eleven-fold overshoot on the 2025 figure alone. The projection methodology leaned on historical utilization from a period before hyperscale AI buildout reshaped the demand curve entirely. The state essentially price-tagged a 2019-era product for a 2025 market.

The fiscal surprise is only part of the story. A grassroots group called Conserve Ohio is collecting signatures for a November ballot measure that would amend the state constitution to ban any new data center consuming more than 25 megawatts per month, according to Insurance Journal's reporting on the situation. To reach the ballot, organizers need more than 413,000 signatures from at least 44 of Ohio's 88 counties by July 1, the Ohio Capital Journal reported. That is a difficult bar, but the effort signals something more durable than a tax policy dispute: communities near large facilities are doing the math on who pays for grid upgrades, road wear, and water consumption, and they don't like the answer.

DeWine himself is not anti-data-center. His office told reporters the governor considers the facilities a critical economic component and pointed to roughly $37 billion in data center investment in Ohio over 2024 and 2025 as proof the incentive worked. The Chamber of Commerce and several labor unions pushed back on the suspension, warning it creates an opening for competing states to poach future projects.

That competitive pressure is real. But the Ohio situation illustrates a structural flaw in how states have been competing for this capital. Incentive programs written for conventional manufacturing or logistics warehouses did not anticipate facilities drawing hundreds of megawatts continuously. When a single campus can move the state's entire exemption budget by itself, the modeling breaks down.

Ohio is not alone. Illinois Gov. JB Pritzker asked that state's legislature in February to freeze data center incentives for two years, per Bloomberg's account of the Ohio action. Separately, a Brookfield Asset Management-backed developer pulled out of a 2,100-acre campus project in Virginia in April after sustained community opposition, Insurance Journal reported.

The pattern suggests the subsidy-driven site selection model that helped build out U.S. data center capacity over the past decade is entering a friction phase. The missing component was never the capital or the demand. It was a durable cost-sharing framework between operators and the states bearing the infrastructure load. Ohio just made that gap visible in the budget line.

Sources cited:
- Bloomberg (https://www.bloomberg.com/news/articles/2026-05-27/ohio-to-halt-data-center-tax-credits-as-opposition-grows)
- Associated Press / Fortune (https://fortune.com/2026/05/29/ohio-data-center-tax-break-cost-explosion/)
- Insurance Journal (https://www.insurancejournal.com/news/midwest/2026/05/29/871752.htm)