Buffett: 800 US Companies Could Wipe Out Income Tax

Eight hundred US companies could wipe out the federal income tax, according to Warren Buffett — and the claim lands against a backdrop in which 88 profitable corporate giants paid the IRS $0 in 2025 rebates.

The number is the story. Buffett, the chairman of Berkshire Hathaway and the most closely watched voice in American capital allocation, has put a figure on the scale of corporate tax avoidance: 800 companies. That figure now anchors a debate over how much revenue the US Treasury can realistically expect from the corporate income tax at all.

The second number sharpens the first. In 2025, 88 large US companies that turned a profit nonetheless paid nothing to the IRS — and in some cases secured rebates. For chief financial officers, tax directors, and audit committees, the two data points frame a material question: is the US corporate income tax base eroding faster than official revenue forecasts assume?

What does the 800-company figure actually mean?

Buffett's arithmetic points at concentration. If 800 companies — a small fraction of the US corporate population — can collectively erase their income tax liability, the effective base for the tax is far narrower than the statutory 21% federal rate suggests.

The mechanism is familiar to any finance function:

• Accelerated depreciation and immediate expensing of capital investment
• Loss carryforwards from prior years applied against current profits
• Tax credits that convert liability into refunds

The result, in the cases Buffett highlights, is not a reduced tax bill. It is a zero. And in 2025 rebates, it was zero for 88 profitable giants — companies with positive accounting earnings that nonetheless owed the IRS nothing.

Why should CFOs care now?

Two implications follow for corporate finance teams.

First, revenue pressure. If a bloc of 800 companies can zero out income tax, lawmakers facing deficits will look elsewhere — at buyback levies, minimum taxes, or base-broadening rules that limit the credits and deductions finance departments currently model into effective tax rates.

Second, disclosure pressure. A zero tax payment on positive profits is the single most quotable number a company can produce in a given fiscal year — and it travels. Boards should expect investor questions and public scrutiny whenever the effective rate diverges sharply from the headline earnings picture.

What happens next?

Buffett's 800-company warning and the 88-company rebate record give both parties in Washington a ready-made statistic. The companies themselves hold a defense Buffett himself has long made: they follow the code Congress wrote. The deduction, the credit, the carryforward — each is statutory.

The counterargument is the one the numbers make by themselves. A corporate income tax that produces $0 from 88 profitable filers, and that Buffett says 800 companies could eliminate outright, taxes something other than the profits the public believes it is taxing.

For finance leaders, the practical takeaway is scenario work: model the cash-tax line under a tightened base, because the political cost of the current one — $0 receipts from profitable giants — is now the cheapest argument available for change.