Can Interest Groups Donate to Campaigns? PACs, Super PACs, Dark Money

Interest groups can donate to campaigns, but only through a political action committee and only within federal dollar limits. A multicandidate PAC can give a federal candidate up to $5,000 per election. Groups that want to spend more have to do it independently of the candidate, through a Super PAC or a nonprofit, and certain donors are barred from giving anything at all.

The Direct Route: PACs and the $5,000 Limit

The standard way an interest group backs a federal candidate is a traditional political action committee. To give at the higher PAC rate, the committee has to qualify as a “multicandidate” PAC, which means three things: registered with the Federal Election Commission for at least six months, contributions received from more than 50 people, and contributions made to at least five federal candidates.¹ Once those conditions are met, the committee files a Notification of Multicandidate Status (FEC Form 1M) within ten days.²

A qualified multicandidate PAC can give any federal candidate $5,000 per election. Primaries and general elections count separately, so the same PAC can put $10,000 behind one candidate in a single cycle.¹ The same PAC can also give up to $15,000 per year to each national party committee, and because each major party has three (a national committee, a House campaign committee, and a Senate campaign committee), the annual per-party ceiling can reach $45,000.³

A newer PAC that hasn’t yet hit multicandidate status is treated like an individual donor: $3,500 per candidate per election for the 2025–2026 cycle.⁴ Every dollar the PAC sends out has to come from voluntary individual contributions, not from corporate profits, union dues, or any other organizational treasury.

PACs themselves are funded by individuals, and those donations are also capped. For the 2025–2026 cycle, an individual can give a PAC that contributes to other federal committees up to $5,000 per year.⁴ The registration trigger for the group itself is low: any organization that receives contributions or makes expenditures over $1,000 in a calendar year becomes a “political committee” and must register with the FEC within ten days.⁵

Groups That Cannot Give Directly at All

Some categories of donor are simply off the table for federal campaigns, PACs, and party committees. Ignoring these rules exposes both the donor and anyone who solicits the contribution to civil penalties and, in serious cases, criminal charges.

Foreign nationals who are not lawful permanent residents cannot contribute, donate, or spend money in connection with any federal, state, or local election. That covers foreign individuals as well as foreign governments and companies, and it is also illegal to solicit or accept the money.⁶
Federal contractors cannot contribute to candidates, parties, or political committees while they are negotiating or performing a federally funded contract. A corporate contractor can still set up and administer a PAC funded by voluntary donations from eligible individuals.⁷
Corporations and labor unions cannot use general treasury money, meaning profits, operating revenue, or mandatory dues, to make direct campaign contributions. They can pay the administrative costs of a PAC and solicit voluntary donations for it.⁸

The foreign-national and federal-contractor bars also apply to Super PACs. Even though Super PACs otherwise take unlimited contributions from most sources, money from those two categories is prohibited.⁹

How Corporations and Unions Participate Anyway

Since corporate and union treasury money cannot go directly to candidates, these organizations participate through a separate segregated fund, or SSF. The sponsoring company or union pays for setup, administration, and fundraising out of its own treasury: office space, salaries, bank charges, phone bills. There is no dollar limit on those overhead costs and no requirement to report them to the FEC.¹⁰ But the political contributions that flow out of the SSF have to come entirely from voluntary donations.

A corporate SSF can only solicit its “restricted class”: executive and administrative employees, stockholders, and the immediate families of both.¹¹ A union’s SSF can similarly solicit its members and their families. Treasury funds and PAC funds must stay strictly separate, and the FEC watches for crossover.

Unlimited Spending Without Giving to the Candidate

Super PACs, formally called independent-expenditure-only committees, can raise and spend unlimited amounts from individuals, corporations, unions, and other PACs.⁹ What they cannot do is give money directly to a candidate or coordinate their spending with one.

An “independent expenditure” is a payment for a communication that expressly supports or opposes an identified candidate and is not made in cooperation, consultation, or at the request of that candidate or the candidate’s agents.⁹ If the FEC concludes that a Super PAC shared polling, discussed ad placement, or ran messaging through the campaign’s consultants, the spending is treated as an in-kind contribution, which blows through the regular limits and opens the door to enforcement.

A hybrid PAC does both jobs at once by keeping two bank accounts. One account collects contributions subject to normal source restrictions and dollar limits and pays out direct donations to candidates. The other accepts unlimited funds for independent expenditures and voter drives, following Super PAC rules: no coordination, no direct candidate contributions from that side.¹²⁹ The two accounts stay segregated, and each pays a proportional share of administrative costs.

The Nonprofit Route and Dark Money

Tax-exempt nonprofits under Section 501(c) of the Internal Revenue Code offer another spending channel. Social welfare organizations (501(c)(4)s) and trade associations (501(c)(6)s) can engage in political campaign activity, but only if it is not their primary purpose.¹³ The IRS reads “primary” to mean political campaign spending has to stay below half of total activity.¹⁴ Charities under 501(c)(3) are barred from any political campaign intervention.

The reason 501(c)(4) spending draws so much attention is donor anonymity. Unlike PACs and Super PACs, social welfare organizations generally do not have to publicly disclose their individual contributors. This is the “dark money” pattern: an interest group routes funds through a 501(c)(4), which then buys ads or donates to a Super PAC. The spending gets reported. The original donors do not.

Bundling Within the Limits

Bundling is a way for interest groups to deliver a lot of money to a candidate without any PAC involved. A bundler collects individual checks, each within the legal per-person limit, and hands the whole package to the campaign. One person shows up with $100,000 in checks that are individually lawful, and the candidate knows exactly who to thank.

When the bundler is a registered lobbyist or a lobbyist-affiliated PAC, disclosure kicks in. For 2026, campaigns must report any lobbyist-bundler who forwards or is credited with bundled contributions above $24,000 in a covered reporting period.¹⁵ The report has to identify the bundler by name, address, and employer.¹⁶ Bundling by people who are not registered lobbyists has no equivalent disclosure rule.

What Gets Disclosed

Every political committee registered with the FEC files periodic reports of receipts and disbursements. Reports list total money in and out, cash on hand, and itemize every contributor who gave more than $200 in aggregate during a calendar year, including name, address, occupation, and employer.¹⁷ Once filed, the reports become public through the FEC’s database.¹⁸ Contributions of $1,000 or more received close to an election trigger a separate 48-hour reporting requirement, so a group cannot dump money into a race after the last regular deadline and expect it to go unnoticed.

Penalties for Getting It Wrong

The FEC handles civil enforcement, and the penalties scale with the conduct. A standard violation, such as a PAC that accidentally exceeds a contribution limit, carries a civil penalty capped at the greater of $24,885 or the amount of the contribution. A knowing and willful violation raises the ceiling to the greater of $53,088 or 200% of the amount involved.¹⁹

Late or missing reports have their own schedule. Fines start around $150 for a modest late filing with no prior history and climb well above $4,000 for a committee that fails to file an election-sensitive report with significant activity and prior violations. Missing the 48-hour notice for a large late contribution carries a base fine of $183 plus 10% of the unreported amount, with escalators for repeat offenders.²⁰ Criminal prosecution is reserved for the most serious cases, typically knowing and willful violations involving large sums, straw-donor schemes, or foreign money, which the FEC refers to the Department of Justice.

1
Office of the Law Revision Counsel. 52 USC 30116 – Limitations on Contributions and Expenditures
2
Federal Election Commission. Instructions for Notification of Multicandidate Status (FEC Form 1M)
3
Federal Election Commission. Contributions Made to Party Committees and PACs
4
Federal Election Commission. Contribution Limits for 2025-2026
5
GovInfo. 52 USC 30101 – Definitions
6
Office of the Law Revision Counsel. 52 USC 30121 – Contributions and Donations by Foreign Nationals
7
GovInfo. 52 USC 30119 – Contributions by Government Contractors
8
Office of the Law Revision Counsel. 52 USC 30118 – Contributions or Expenditures by National Banks, Corporations, or Labor Organizations
9
Federal Election Commission. Contributions to Super PACs and Hybrid PACs
10
Federal Election Commission. Day-to-Day Operations – FEC
11
Federal Election Commission. Solicitable Class of Corporation
12
Federal Election Commission. Bank Accounts of Nonconnected PACs
13
Office of the Law Revision Counsel. 26 USC 501 – Exemption From Tax on Corporations, Certain Trusts, Etc.
14
Internal Revenue Service. Political Campaign and Lobbying Activities of IRC 501(c)(4), (c)(5), and (c)(6) Organizations
15
Federal Election Commission. Lobbyist Bundling Disclosure Threshold Increases (2026)
16
eCFR. 11 CFR 104.22 – Disclosure of Bundling by Lobbyist/Registrants and Lobbyist/Registrant PACs
17
Office of the Law Revision Counsel. 52 USC 30104 – Reporting Requirements
18
Federal Election Commission. Filing Candidate Reports
19
eCFR. 11 CFR 111.24 – Civil Penalties
20
Federal Election Commission. Calculating Administrative Fines