US States Roll Back Data Center Tax Breaks, 7% Cost Hit Looms

The state-level cost basis for AI infrastructure just got wobbly. The Information reports that a wave of US states is pulling back sales tax exemptions that data center operators have quietly relied on, and the math is not small: repealing the breaks could add roughly 7% or more to the equipment costs that go into a new build.

The trigger story is Ohio. The state had projected its exemption at around $136 million in fiscal 2025. It ran to nearly $1.6 billion instead, and Gov. Mike DeWine suspended new exemptions this spring. Once one governor cited a number that big, other statehouses started paying attention. Illinois paused its incentive program on July 1, Arizona enacted a three-year moratorium in a budget that took effect the same day, and at least nine states are weighing outright repeal. Lawmakers in around 28 states have introduced bills to scale back or modify their programs, per coverage of the underlying reporting.

Why this matters if you are underwriting an AI infrastructure buildout is straightforward: the exemptions were never the reason a hyperscaler picked a site, but they were a real line in the model. A 7% add to equipment cost is a step-change when you compound it across the multi-hundred-billion-dollar capex plans the big cloud players have publicly committed to. States with intact incentives quietly become more attractive, and the ones attaching new strings, such as Pennsylvania's proposal to tie tax benefits to grid and water commitments and Oklahoma's ratepayer-protection law, reset the negotiation entirely.

The honest caveat is that this is best read as a directional signal rather than a settled number. The 7% figure is a headline estimate, not a facility-by-facility model, and the coverage does not spell out whether existing sites will be grandfathered or hit at the next equipment refresh. What the reporting also does not quantify is how much of the announced hyperscaler capex is actually exposed to the specific states now moving.

The forward-looking read is simple enough. If you were planning to break ground in a state whose incentive is under review, the underwriting has to be redone without the exemption, not with the assumption that a grandfather clause will save you. And if you run a state program that has held steady so far, you have a short window before the industry re-prices where it wants to build.