Title 26 › Subtitle Subtitle A— - Income Taxes › Chapter CHAPTER 1— - NORMAL TAXES AND SURTAXES › Subchapter Subchapter B— - Computation of Taxable Income › Part PART IX— - ITEMS NOT DEDUCTIBLE › § 279
Limits how much interest a company can deduct when it borrows money to buy another company. A company cannot deduct interest on that acquisition debt once the interest goes over $5,000,000, minus any interest paid on related acquisition obligations that are not treated as "corporate acquisition indebtedness." Debt is treated that way if it was issued to pay for buying another company’s stock or most of its business assets, if it is subordinated to regular trade creditors or clearly subordinated to major unsecured debt, if it can be converted into the issuer’s stock or comes with an option to buy stock, and if either the issuer’s debt-to-equity ratio is more than 2 to 1 or its projected earnings are no more than three times the annual interest. Debt-to-equity means total debt compared to the company’s money and other assets (after accounting for their tax basis) minus debt. Projected earnings means the average yearly earnings over the last three years, calculated without subtracting interest, depreciation, tax, or certain distributions. Annual interest is measured from total outstanding debt and is combined with the acquired company’s amounts when needed. Banks and finance companies get special reductions. The rule starts to apply in the first year the tests are met and can stop applying later if conditions change (including a rule requiring at least 5 percent voting ownership for stock buys, a three-year rule, and other timing rules). Foreign target companies that get almost all income outside the U.S. are excluded. Affiliated groups are treated together. Refinances or renewals aren’t treated as new debt, and anyone who assumes or guarantees the debt is treated the same.
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Internal Revenue Code — Source: USLM XML via OLRC
Legislative History
Reference
Citation
26 U.S.C. § 279
Title 26 — Internal Revenue Code
Last Updated
Apr 6, 2026
Release point: 119-73