A quiet change in Idaho tax law is about to cost data center contractors and suppliers thousands in lost exemptions—but only if you miss the April 1, 2026 deadline.
Most Idaho construction and trades owners don't realize that a provision buried in H0897 just eliminated a significant sales tax break they may have been counting on—and the cutoff date is closer than you think.
For years, Idaho law gave qualifying data center operators a sales tax exemption on two categories of purchases: server equipment and the construction materials, buildings, and fixtures needed to house those servers. That second exemption is now gone for any new data center project that breaks ground on or after April 1, 2026.
The change is codified in Section 1 of H0897, which amends Idaho Code §63-3622VV(1). The bill narrowed the exemption to servers only, eliminating the construction-materials exemption entirely for projects commencing construction after the April 1 cutoff.
If you're a general contractor, electrical contractor, HVAC supplier, or materials distributor working on a new data center facility in Idaho, this matters directly to your bottom line. Clients who were planning to pass construction costs through tax-exempt purchases will now owe sales tax on those materials and labor components—which often means they'll look to negotiate that cost back into your bid.
Existing data center projects and expansions that commenced construction before April 1, 2026 remain grandfathered under the old rules and can still claim the full exemption. But any new facility or major new phase starting on or after that date loses the construction-materials exemption.
The law is effective retroactively to January 1, 2026. That means the clock is already running. If a data center operator wants to preserve the old exemption structure, they need to have construction commence—not merely be approved or permitted, but actually commence—before April 1, 2026. That's roughly three months away as of this writing.
For contractors and suppliers, this creates a narrow window. Projects in the pipeline that haven't yet broken ground need to move fast if the client wants to lock in the old exemption. Projects scheduled to start after April 1 should budget for sales tax on materials and fixtures.
If you have data center work in your pipeline, confirm the actual construction-commencement date with your client immediately. "Commencement" has a specific meaning in tax law and isn't always the same as permit issuance or mobilization. A few weeks' difference can mean the difference between a full exemption and none.
Review any outstanding bids or contracts for data center projects. If you quoted a price assuming the client would handle sales tax recovery, that assumption may no longer hold after April 1. Clarify with clients whether they're aware of this change and how it affects project economics.
For data center operators reading this: talk to your contractors and your accountant now. The April 1 deadline is real, and it's not far away.
Idaho Code §63-3622VV(1), as amended by H0897, Section 1. Effective retroactively to January 1, 2026; April 1, 2026 construction-commencement cutoff applies.