Title 26 › Subtitle Subtitle A— Income Taxes › Chapter 1— NORMAL TAXES AND SURTAXES › Subchapter B— Computation of Taxable Income › Part IV— TAX EXEMPTION REQUIREMENTS FOR STATE AND LOCAL BONDS › Subpart C— Definitions and Special Rules › § 150
Ground rules for the tax-exempt bond part of the tax code. A "bond" includes any obligation, a "governmental unit" does not include the federal government, "net proceeds" means the money raised minus required reserves, and "tax-exempt" means the bond's interest is excluded from gross income. Property owned on behalf of a governmental unit counts as owned by it. The rules also have teeth: when property financed with tax-exempt bonds stops being used the way the bond's tax break requires, the borrower loses the interest deduction for that period. If your home was financed through a qualified mortgage bond or veterans' mortgage bond and it stops being the principal residence of all the borrowers for a continuous year or more, you cannot deduct the interest until one of them moves back in — unless the IRS finds the failure was beyond your control and denying relief would cause undue hardship. Similar cut-offs hit rental housing projects that break their tenant requirements, charity-financed facilities used by other businesses, and other bond-financed facilities put to non-qualifying uses. Separately, bonds of qualified scholarship funding corporations (nonprofits set up by states to buy student loans) count as state or local bonds, and a volunteer fire department's bond counts as a political subdivision's bond if 95 percent or more of the net proceeds go to a firehouse or firetruck.
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Internal Revenue Code — Source: USLM XML via OLRC
Legislative History
Reference
Citation
26 U.S.C. § 150
Title 26 — Internal Revenue Code
Last Updated
Apr 6, 2026
Release point: 119-73