A quiet change to Idaho's data center tax exemption could affect your bids and margins if you work on these projects.
Most construction and trades owners in Idaho don't realize that a provision buried in H0897 is about to narrow a sales tax exemption that has made data center projects more competitive—and it takes effect sooner than you might think.
Under current Idaho law, qualifying data center operators and their contractors get a sales tax exemption on two categories of equipment and materials: internal server equipment and the construction materials and structural components used to build the facility itself (think steel, concrete, fixtures, HVAC systems, electrical infrastructure).
H0897 narrows that exemption significantly. For any data center that begins construction on or after April 1, 2026, the sales tax break now applies only to the internal server equipment. The exemption on construction materials, structural components, and facility buildout goes away.
In plain terms: if you're bidding a data center project that breaks ground after April 1, 2026, you'll be paying sales tax on materials and components that would have been exempt under the old rule.
For general contractors, subcontractors, and material suppliers, this is a margin issue. Sales tax exemptions lower your cost of goods, which either improves your profit or lets you bid more competitively. Losing that exemption on a large data center build—where materials and structural work can represent millions of dollars—changes the economics of the project.
If you're already in contract or have a project that breaks ground before April 1, 2026, you're grandfathered in under the old rule. If you're quoting work that starts after that date, you need to account for the tax hit in your estimates.
The bill is effective retroactively to January 1, 2026, but the construction cutoff that matters to you is April 1, 2026. Any data center that begins construction on or after that date loses the exemption on construction materials and facility components. (Section 1, Page 1, amending Idaho Code §63-3622VV(1).)
That retroactive January 1 effective date is worth watching—it may affect how the state interprets projects that straddle the timeline, so if you have work in that window, clarify the status with your client and the state.
If you work on data center projects or bid them regularly, review your pipeline. Projects breaking ground before April 1, 2026 operate under the old, broader exemption. Projects after that date don't. Make sure your estimates and contracts reflect the right tax treatment, and if a client is planning a data center build, the timing of groundbreaking could affect their total project cost—and your bid.
For a more detailed breakdown of how this affects your specific trade or project type, resources tailored to Idaho construction businesses are available.