Seven Senate Democrats led by Ron Wyden, the Senate Finance Committee’s ranking member, have asked Meta Chairman and CEO Mark Zuckerberg to explain whether the company claimed federal research tax credits for its AI data centres, Quartz reported on 14 October 2026. The senators are examining credits that, according to federal regulatory filings cited in their letter, reduced Meta’s federal income tax liability by $6.6 billion from 2023 through 2025.
Key points
- The senators want Meta to say whether it claimed research credits for AI data centres in tax years 2023 through 2025 and, if so, on what legal basis.
- They ask how much of each year’s credits related to chips, computing equipment and other data centre materials.
- The letter also raises a separate dispute over stock-based compensation to Zuckerberg claimed as a research expense.
Meta’s $6.6 billion research credit
The amounts the senators identify rose across the three tax years: $700 million in 2023, $2 billion in 2024 and $3.9 billion in 2025. Their question is how much of those claims concerned the construction and equipment of AI data centres, rather than work that qualifies for a credit intended to offset experimental research. The letter cites a Joint Committee on Taxation estimate that the research credit cost the government $32 billion in 2025.
The senators say published reports indicate that Meta described its AI data centres to the Internal Revenue Service as experimental “pilot models” to claim the credit. They argue that data centre hardware uses proven technology and would not normally qualify for a credit directed at work involving a high degree of technical uncertainty. In the senators’ words, that approach violates “the spirit and, potentially, the letter” of the tax law.
Whether Meta claimed the credit for those centres is among the questions the senators put to the company. They ask it to identify the legal justification if it did, and to break down, year by year, the credits associated with chips, computing equipment and other materials. Those requests seek a distinction that matters to the tax treatment: the cost of building computing capacity is a different proposition from the cost of resolving a technical uncertainty.
An earlier AI Affairs report covered Meta’s use of research credits on AI data centres to cut its 2025 tax bill. The senators’ letter turns that tax treatment into a request for an account of which expenditures Meta claimed, in which years, and under what interpretation of the credit.
The IRS and Meta’s tax positions
The senators also point to Meta’s most recent annual report, which connects its uncertain tax positions to “uncertainties with our research and development tax credits.” They say the company’s investor disclosures indicate that its approach may not survive IRS scrutiny. That qualification belongs to Meta’s own assessment as described in the letter; it is not an IRS determination on the data centre claims.
The requested account extends to advice Meta may have obtained. The senators ask whether it consulted EY or other accounting firms before claiming the credits and seek copies of any opinions those firms supplied. That would put the company’s stated legal reasoning alongside the categories of spending for which it sought federal tax relief.
Congressional attention to data centre tax benefits also reaches beyond this federal research credit. A previous AI Affairs report covered Senate Democrats’ account of billions in state and local revenue lost to data centre tax breaks. The Meta letter concerns a separate federal provision and asks about the company’s own claims, rather than the cost of state and local incentives.
Zuckerberg’s $4.1 billion compensation claim
The letter also questions Meta’s classification of $4.1 billion worth of share-based pay for Zuckerberg as eligible research spending. According to the letter, the IRS is challenging that position and seeking $355 million in back taxes. The senators ask whether Meta intends to continue contesting the claim. Unlike their questions about data centre spending, this dispute already involves a stated challenge by the tax authority.
The senators have asked Meta to respond by 31 October, including with its legal justification for any AI data centre research credits claimed in the three tax years and any accounting opinions it obtained.
