A buried provision in Idaho's H0897 eliminates sales tax breaks on data center building materials after April 1, 2026—potentially costing construction firms thousands.
Most Idaho construction and trades owners haven't heard about a quiet change buried in H0897 that could hit their wallet hard if they're bidding data center projects. Starting April 1, 2026, the state is narrowing a sales tax exemption that has long covered the full cost of building a new data center. After that date, only server equipment stays exempt. Everything else—structural steel, concrete, electrical systems, HVAC, fixtures—gets taxed at full rate.
Idaho law has exempted sales tax on equipment and materials used to construct new data center facilities. H0897 amends §63-3622VV(1) to restrict that exemption to server equipment only, effective retroactively to January 1, 2026, with the restriction applying to any data center construction commenced on or after April 1, 2026.
The practical effect: if you're a general contractor, electrician, HVAC specialist, or materials supplier bidding a data center project that starts on or after April 1, 2026, your customer will owe Idaho sales tax on construction materials and labor-related goods. That's a significant cost increase with no exemption to offset it.
This affects any business planning or financing a new data center build in Idaho after April 1, 2026. It also matters to construction firms and trades that bid these projects—because your customers will face higher total project costs, which may shrink budgets or push timelines earlier to beat the April deadline.
If you're currently bidding a data center project with a start date near April 1, 2026, the timing question just became critical. A project that breaks ground on March 31 gets the exemption. One that starts April 1 doesn't.
Data center construction is capital-intensive. Sales tax exemptions on building materials and structural components can represent hundreds of thousands of dollars in a single project. Losing that exemption doesn't just change the math—it can change whether a project pencils out at all.
If you're in estimating or project management, you need to know this date. Clients planning data center work will be asking whether they can accelerate timelines to stay under April 1. That affects your scheduling, material orders, and crew planning.
The retroactive effective date (January 1, 2026) also means the window to start construction and qualify for the exemption is roughly three months. Any data center project with a planned start date in early 2026 should already be in motion or locked in.
If you're involved in data center bidding or construction, review your current and pending projects for start dates. If you're a supplier or trades firm, flag this with your data center clients now—they may need to accelerate plans. The difference between starting March 31 and April 1, 2026 is the difference between a tax-exempt project and a fully taxed one.
Source: Idaho H0897, Section 1, amending §63-3622VV(1).