The Section 527(f) tax hits a tax-exempt organization under Section 501(c) when it spends money from its general treasury to influence an election. The rate is 21 percent, and it applies to the lesser of the organization’s political campaign spending for the year or its net investment income. The point of the tax is to keep the tax advantage on investment income from quietly funding partisan campaign work.
Which Organizations Owe the Tax
The tax applies to any organization described in Section 501(c) and exempt under Section 501(a) that spends on political campaign activity. In practice, that mostly means 501(c)(4) social welfare groups, 501(c)(5) labor unions, and 501(c)(6) business leagues and chambers of commerce.1Office of the Law Revision Counsel. 26 USC 527 – Political Organizations – Section: (f) Exempt Organization, Which Is Not Political Organization, Must Include Certain Amounts in Gross Income These groups exist for broad nonpolitical missions but sometimes fund ads, contribute to candidates, or support campaign infrastructure.
The tax is not aimed at dedicated political organizations, which are already taxed under Section 527 as their primary purpose. It targets the in-between situation: a group whose main work is nonpolitical but that dips into campaign spending from its general funds, either directly or through another organization.
What Counts as an Exempt Function Expenditure
An exempt function expenditure is any amount spent to influence the selection, nomination, election, or appointment of someone to a federal, state, or local public office. The definition also reaches offices within political organizations and the election of presidential or vice-presidential electors.2Office of the Law Revision Counsel. 26 USC 527 – Political Organizations – Section: (e) Other Definitions
Common examples: contributing to a candidate’s campaign, funding advertising that supports or opposes a candidate, paying for campaign-related polling, and covering travel for political activities. Indirect costs count too. If staff time or office resources are devoted to partisan work, a share of those costs is an exempt function expenditure.3Internal Revenue Service. Section 527(f) Tax on Exempt Function Expenditures
Some activities that touch politics do not trigger the tax. Voter registration and get-out-the-vote drives conducted on a nonpartisan basis are excluded, as long as the organization does not tie them to any particular candidate or party. Appearing before a legislative body about an appointment or confirmation is also excluded, and spending to support or oppose a cabinet confirmation does not count as an exempt function expenditure.4eCFR. 26 CFR 1.527-2 – Definitions
Lobbying is a separate category and does not trigger the 527(f) tax. Lobbying means trying to influence legislation, such as contacting lawmakers about a bill. Organizations under 501(c)(4), (c)(5), and (c)(6) can lobby without limit as long as it relates to their exempt purpose, and none of that spending feeds the 527(f) calculation. Political campaign activity, by contrast, targets candidates for office.5Internal Revenue Service. Exempt Organizations Continuing Professional Education Technical Instruction Program for FY 2003
How the Tax Is Calculated
The tax equals 21 percent of the lesser of two numbers for the year: total exempt function expenditures, or net investment income.6Office of the Law Revision Counsel. 26 USC 527 – Political Organizations – Section: (f) The 21 percent rate is the corporate rate under Section 11(b).7Office of the Law Revision Counsel. 26 USC 11 – Tax Imposed
Two worked examples show how the comparison plays out. A social welfare group spends $80,000 on campaign ads but earns only $30,000 in net investment income; the tax applies to $30,000, producing a liability of $6,300. A different group earns $200,000 in investment income but spends only $15,000 on political activity; the tax applies to $15,000, yielding $3,150. The organization always pays on the smaller figure.
Calculating Net Investment Income
Net investment income starts with gross income from interest, dividends, rents, and royalties, plus net gains from the sale or exchange of assets. From that total, the organization subtracts deductions directly connected to producing the investment income.8Office of the Law Revision Counsel. 26 USC 527 – Political Organizations Allowable deductions include investment advisory fees, brokerage commissions, and property management costs for rental buildings. General administrative overhead that would exist regardless of the investments does not qualify. Items already subject to the unrelated business income tax under Section 511 are excluded from the calculation to prevent double taxation.9Internal Revenue Service. Instructions for Form 1120-POL
An organization with zero net investment income owes no 527(f) tax no matter how much it spends on politics. The tax recaptures the tax benefit on investment income; it is not a direct penalty on the political spending.
Using a Separate Segregated Fund to Avoid the Tax
The most effective way to avoid the tax is to route political spending through a separate segregated fund, commonly called a PAC. Under Section 527(f)(3), a separate segregated fund maintained by a 501(c) organization is treated as a separate organization for purposes of the political expenditure tax. Money spent from the fund does not count as the parent organization’s exempt function expenditure.8Office of the Law Revision Counsel. 26 USC 527 – Political Organizations
The key is genuine segregation. The fund needs its own bank account, distinct from the organization’s general treasury, and records showing that its money comes from voluntary political contributions and designated dues rather than investment income. If an IRS examiner finds treasury funds commingled with the segregated fund, the separate-entity treatment collapses and the 527(f) tax applies to the full amount.10Internal Revenue Service. Audit Technique Guide – Political Organizations
Why 501(c)(3) Organizations Are in a Different Regime
Charities and other 501(c)(3) organizations are not in the 527(f) system at all. They are absolutely prohibited from participating in any political campaign on behalf of or in opposition to any candidate for public office. Violating that ban can cost the organization its exempt status.11Internal Revenue Service. Restriction of Political Campaign Intervention by Section 501(c)(3) Tax-Exempt Organizations Section 4955 also imposes excise taxes on the organization and, in some cases, personally on managers who approved the expenditure.12Office of the Law Revision Counsel. 26 US Code 4955 – Taxes on Political Expenditures of Section 501(c)(3) Organizations A (c)(4) that spends on politics pays the 527(f) tax and moves on. A (c)(3) that does the same thing risks its exempt status.
Filing on Form 1120-POL
Organizations owing the 527(f) tax report it on Form 1120-POL, U.S. Income Tax Return for Certain Political Organizations. The return is due by the fifteenth day of the fourth month after the organization’s tax year ends. For a calendar-year filer, that is April 15.9Internal Revenue Service. Instructions for Form 1120-POL
An organization can request an automatic six-month extension by submitting Form 7004 on or before the original due date. The extension gives more time to file but not to pay. Any tax owed is still due by the original deadline, and interest accrues on unpaid balances from that date.13Internal Revenue Service. Instructions for Form 7004 Estimated tax payments are not required. The organization pays its full liability with the return rather than making quarterly installments.9Internal Revenue Service. Instructions for Form 1120-POL
Organizations that must file at least ten returns of any type during the calendar year, counting W-2s, 1099s, employment tax returns, and excise tax returns, must file Form 1120-POL electronically. Organizations below that threshold may e-file voluntarily.9Internal Revenue Service. Instructions for Form 1120-POL
Filing late triggers a penalty of 5 percent of the unpaid tax for each month or partial month the return is late, capped at 25 percent.9Internal Revenue Service. Instructions for Form 1120-POL A separate late-payment penalty of 0.5 percent per month applies to any tax not paid by the due date, also capped at 25 percent.14Internal Revenue Service. Political Organization Filing Requirements – Consequences of Not Paying Tax Due on Form 1120-POL Interest on unpaid balances accrues from the original due date until the balance is paid in full, even with a filing extension in place. If the organization receives a penalty notice and believes it had reasonable cause, it should respond to the notice with an explanation at that point rather than attaching one to the return.
Recordkeeping the IRS Expects
The IRS expects detailed records from any exempt organization that spends on politics. At a minimum, keep records of contributions received, with donor names, addresses, and amounts, and of expenditures made, with payee names, addresses, amounts, and the purpose of each payment. When staff or facilities serve both the exempt mission and political activity, allocate costs on a reasonable and consistent basis. Time spent on each type of activity is an accepted method for splitting salaries.10Internal Revenue Service. Audit Technique Guide – Political Organizations
Keep copies of any campaign materials the organization produces or funds, including flyers, signs, and recordings of broadcast ads. Minutes or other records of internal discussions about political activity help during an audit. Without clear records, it becomes hard to show that specific expenditures were mission-related rather than political, and that shift rarely helps the organization.