Congress moves to close dark-money tax deduction loophole

What it does

This bill amends the tax code to treat donations of appreciated property (like stocks or real estate that have gained value) to certain tax-exempt organizations the same way the law currently treats donations to political organizations. Specifically, it expands the definition of 'specified organization' to include tax-exempt groups classified as 501(c)(4), 501(c)(5), and 501(c)(6) organizations—categories that include social welfare groups, labor unions, and business leagues—many of which operate as 'dark money' vehicles that do not disclose their donors. The effect is to deny donors a tax deduction for appreciated property given to these groups, closing a tax advantage that previously applied only to political organizations.

Why we flagged it

The bill's operative mechanism is to close a tax deduction loophole that has allowed donors to fund politically active tax-exempt organizations without disclosure. It does this by expanding the scope of IRC §84 to treat donations to 501(c)(4/5/6) groups the same as donations to explicit political organizations—a straightforward anti-dark-money measure.

What the text implies

• Donors to 501(c)(4) social welfare organizations, 501(c)(5) labor unions, and 501(c)(6) business leagues will lose the ability to claim a tax deduction for appreciated property donations, increasing the after-tax cost of giving to these groups and potentially reducing their funding.
• The bill may reduce the financial attractiveness of using tax-exempt entities as conduits for political spending, potentially shifting dark-money flows to other structures or reducing overall spending by these groups.
• Organizations that rely on large donations of appreciated property (e.g., real estate, securities) from wealthy donors may see a decline in such contributions, affecting their operational capacity.

Section numbers refer to the bill text the analysis read — linked under Primary records below.

Who it affects

The bill reduces a tax subsidy for donations to organizations that operate outside public disclosure requirements, making it more expensive for donors to fund dark-money groups and potentially reducing their financial power. This strengthens transparency and accountability in political spending by removing a financial incentive to channel money through opaque tax-exempt entities.

Named in the bill

Internal Revenue Code of 1986, IRC Section 84, IRC Section 527(e)(1), IRC Section 501(c)(4), IRC Section 501(c)(5), IRC Section 501(c)(6), House Committee on Ways and Means

Where it stands

17 cosponsors: 17 Democrats.

• Oct 1, 2026 — Introduced · Congress.gov: “Introduced in House”
• Oct 1, 2026 — Referred to House Committee on Ways and Means · Congress.gov: “Referred to the House Committee on Ways and Means”

Dates and quoted wording are Congress.gov's action record; the timeline shows status changes, not every procedural step.