Iowa data center tax incentives run on a three-tier sales and use tax system: a full state exemption for projects investing at least $200 million, a 50 percent partial refund for projects between $10 million and $200 million, and a narrower 50 percent partial refund for projects between $1 million and $10 million. The top tier also unlocks a property tax exemption on data center equipment. A law change effective June 6, 2025 shortened the electricity and backup fuel exemption for new facilities, and where the data center sits now matters as much as how much it spends.
The $200 Million Full Exemption
A data center that invests at least $200 million in an Iowa location within its first six years of operation qualifies for a complete exemption from Iowa sales and use tax on qualifying purchases. The facility must also maintain at least 5,000 square feet dedicated to data center operations. The governing statute is Iowa Code section 423.3(95).
Qualifying purchases at this tier include computers and equipment needed to run the facility, cooling and temperature-control systems, power infrastructure such as substations, backup generators and battery systems, racking, cabling and trays, backup generator fuel, and electricity. The exemption on computers and physical equipment is permanent. The exemption on electricity and backup fuel is subject to the duration rules described below.
The investment clock starts when the data center begins site preparation or when the initial lease term begins, whichever applies. The $200 million figure includes the cost of land and any later purchases of adjacent land, which makes the threshold more reachable for campus-style builds than the number alone suggests.
The $10 Million Partial Refund Tier
Facilities that invest at least $10 million in new construction, or at least $5 million in rehabilitating an existing building, but less than $200 million, qualify for a 50 percent refund of the Iowa sales and use tax paid on qualifying items. The refund is capped at 5 percent of the purchase price and does not cover local option sales tax. The facility must be at least 5,000 square feet and must reach the investment threshold within six years of beginning operations. The governing statute is Iowa Code section 423.4(7).
The qualifying purchase categories are the same as the full exemption: computers, cooling, power infrastructure, racking, cabling, fuel, and electricity. Duration depends on the investment amount. Projects investing between $136 million and $200 million get the refund for seven years. Projects between $10 million (or $5 million rehabilitated) and $136 million get it for ten years.
The $1 Million Partial Refund Tier
The entry-level tier under Iowa Code section 423.4(8) covers data centers investing at least $1 million but less than $10 million in new construction, or at least $1 million but less than $5 million in a rehabilitated building. Like the middle tier, it pays a 50 percent refund of Iowa sales and use tax, capped at 5 percent of the purchase price, and excludes local option sales tax.
The scope is narrower. The refund applies only to fuel used for generating heat, power, steam, or electrical current, and to electricity consumed by computers, machinery, and other operational equipment. Purchases of the computers and equipment themselves are not covered. The investment must be made within three years of beginning operations rather than six, and the refund runs for five years. There is no minimum square footage requirement.
How the June 2025 Change Affects Electricity and Fuel
For data centers that began operating before June 6, 2025, the sales and use tax exemption on electricity and backup fuel at the $200 million tier has no time limit, and the exemption on equipment is permanent regardless of start date.
For facilities that begin operating on or after June 6, 2025, the electricity and fuel exemption is no longer permanent. The duration turns on location:
- In cities over 30,000 in population, the exemption on electricity and backup fuel runs for the first 10 years of operation.
- In smaller communities, it runs for the first 15 years.
Population figures come from the most recent federal census. For a high-consumption facility, the extra five years available outside larger cities can translate into millions of dollars in additional savings.
Property Tax Exemption for the Top Tier
Separate from the sales and use tax benefits, Iowa exempts certain data center property from local property tax. The exemption covers personal property such as servers, networking equipment, and cooling hardware. It does not cover land or buildings. To qualify, the data center must meet the same requirements as the $200 million sales and use tax exemption under section 423.3(95), including the investment threshold and the 5,000-square-foot minimum.
The owner must file an application with the local assessor by February 1 of the first year the exemption is claimed. Missing that date can push the exemption back a full year, so it is one of the first administrative tasks to handle after reaching the investment threshold.
Claiming the Sales and Use Tax Benefits
At the $200 million tier, the Iowa Department of Revenue does not issue a special exemption certificate. The data center uses two standard forms:
- Form 31-113, the Iowa Sales Tax Exemption Certificate for energy purchases, when buying electricity or backup generator fuel.
- Form 31-014, the Iowa Sales/Use/Excise Tax Exemption Certificate, when buying computers, equipment, and other qualifying items.
The data center gives the appropriate form to the vendor or utility provider at the time of purchase, and the vendor keeps it as proof the sale was exempt. If the data center claims an exemption it was not entitled to, the business itself owes the unpaid tax to the Department of Revenue.
The partial-refund tiers work in the opposite direction. The data center pays full sales and use tax at the time of purchase and later files a refund claim with the Department of Revenue under Iowa Administrative Code rule 701-215.13.
What Happens If You Miss the Investment Threshold
The clawback provisions are serious. At the $200 million tier, a data center that fails to reach at least 80 percent of the minimum investment within the six-year window loses the exemption entirely. The business then owes all the sales and use tax it would have paid on every exempt purchase, plus statutory penalties and interest. On a project of this size, that can run into tens of millions of dollars, and capital planning should treat cost overruns and schedule slips as real risks against the six-year clock.
The partial-refund tiers work the same way. A data center that misses its threshold must return every refund it received, with penalties and interest. The dollars are smaller because the refund is only 50 percent of the state tax, but the proportion of the incentive lost is the same.
Common Misconceptions About What Is Covered
A few limits are worth flagging before capital is committed. The partial-refund programs at the $1 million and $10 million tiers do not cover local option sales tax, which runs at 1 percent in most Iowa jurisdictions. Only the $200 million full exemption eliminates the full state tax burden.
Data center businesses are also excluded from Iowa’s other major business incentive programs. Iowa Code Chapter 15 defines “data center business” by reference to section 423.3(95) and expressly bars data centers from both the Major Economic Growth Attraction (MEGA) program and the Business Incentives for Growth (BIG) program. The sales tax incentives stand on their own.
And at the $1 million tier, remember that only fuel and electricity qualify. A smaller facility buying servers and cooling hardware pays full sales tax on that equipment with no refund available.
Federal Incentives That Stack on Top
Iowa’s incentives sit alongside federal benefits worth knowing about. The One Big Beautiful Bill Act made 100 percent first-year bonus depreciation permanent for property acquired after January 19, 2025. Servers, networking gear, cooling equipment, and power infrastructure placed in service in 2026 or later can be fully expensed in the year of purchase.
Data centers that generate or purchase clean electricity may also qualify for federal energy tax credits. The Clean Electricity Investment Credit under IRC Section 48E provides a base credit of 6 percent of the qualified investment in zero-emission energy facilities placed in service after December 31, 2024. Meeting prevailing wage and registered apprenticeship requirements raises the credit to 30 percent. An additional 10 percentage points is available for meeting domestic content requirements on steel, iron, and manufactured products, and another 10 percentage points applies if the facility sits in an energy community. Alternatively, the Clean Electricity Production Credit under IRC Section 45Y pays a per-kilowatt-hour credit, starting at 0.3 cents and rising to 1.5 cents with wage and apprenticeship compliance.
Records to Keep
Iowa’s clawback window runs through the full six-year investment period and can extend beyond it if a dispute arises. Purchase records, installation documentation, exemption certificates, refund claims, and a running investment total should be tied together in one audit trail per tier. On the federal side, the IRS generally requires records supporting a deduction or credit to be kept until the statute of limitations expires for the relevant return, and property records until the limitations period expires for the year the asset is disposed of. For data center equipment that may be depreciated, upgraded, or replaced over a decade, that effectively means keeping the paperwork for the life of the facility.