What Is a Super PAC?

A super PAC is a type of political organization in the United States that can raise and spend unlimited amounts of money to support or oppose political candidates — as long as it does not coordinate directly with the candidates or parties it supports.

That single feature — unlimited money, independently spent — is what makes super PACs different from every other kind of political committee, and what makes them one of the most powerful and most debated forces in modern American politics.

This page explains, in plain English, where super PACs came from, what they can and cannot legally do, how they differ from traditional PACs and so-called dark money groups, and why they matter.

Table of Contents

The Short Version

A super PAC — formally known as an “independent expenditure-only committee” — is a political committee registered with the Federal Election Commission (FEC) that:

  • Can accept unlimited contributions from individuals, corporations, unions, and other groups.
  • Can spend unlimited amounts on political advertising and other activities to support or oppose federal candidates.
  • Must publicly disclose its donors and expenditures in regular filings with the FEC.
  • Cannot give money directly to candidates or their campaigns.
  • Cannot coordinate its spending with the candidates, campaigns, or parties it supports.

Super PACs have existed only since 2010. They emerged from two federal court decisions that fundamentally reshaped American campaign finance law.

How Super PACs Came to Exist

For most of the modern era of campaign finance regulation — roughly from the 1970s through the 2000s — federal law placed strict limits on how much money individuals, corporations, and unions could contribute to influence federal elections. Corporations and unions, in particular, were broadly prohibited from using their general treasury funds for political advertising about candidates.

Two court decisions in 2010 dismantled those restrictions for independent political spending.

Citizens United v. FEC (January 2010). In a 5–4 decision, the U.S. Supreme Court ruled that the government cannot prohibit corporations and unions from spending money on political speech, including advertising for or against candidates, as long as that spending is independent of the candidates themselves. The Court held that such restrictions violated the First Amendment’s free speech protections. Citizens United did not, by itself, create super PACs — but it cleared the constitutional path for them.

SpeechNow.org v. FEC (March 2010). Two months later, the U.S. Court of Appeals for the D.C. Circuit, applying the logic of Citizens United, ruled that the government could not limit how much money individuals contribute to groups that make only independent expenditures. Together, these two decisions meant that a new kind of political committee could exist: one that accepts unlimited contributions from anyone and spends them independently on elections.

The FEC issued guidance later in 2010 formally recognizing these “independent expenditure-only committees.” The press quickly nicknamed them “super PACs,” and the name stuck.

The first major election cycle to feature super PACs at scale was the 2012 presidential race. Their role has grown in every cycle since.

What Super PACs Can Do

Super PACs operate under a wide latitude. Specifically, they can:

  • Accept unlimited contributions from individuals, for-profit corporations, labor unions, trade associations, and other political committees, including other super PACs.
  • Spend unlimited amounts producing and airing television, radio, digital, and print advertisements that explicitly support or oppose federal candidates.
  • Fund get-out-the-vote operations, voter registration drives, polling, opposition research, direct mail, door-to-door canvassing, and field organizing.
  • Operate in any federal race — presidential, U.S. Senate, or U.S. House — and many also engage in state and local races, sometimes through affiliated committees.
  • Continue operating between elections, with some super PACs functioning year-round as permanent political organizations.

What Super PACs Cannot Do

The legal line that defines a super PAC is the prohibition on coordination and direct contribution. Specifically, super PACs cannot:

  • Donate money directly to a candidate’s campaign committee.
  • Donate money to a political party committee in unlimited amounts (the same federal contribution limits apply as for any donor).
  • Coordinate their spending with a candidate, the candidate’s campaign, or a political party. This includes coordinating on the content, timing, placement, or strategy of advertisements.
  • Hide their donors. Super PACs are required to disclose their donors to the FEC. (The “dark money” loophole, discussed below, involves donors routed through other entities — not a feature of super PACs themselves.)

Violations of these rules can, in theory, result in FEC enforcement action. In practice, enforcement has been limited, and the definition of “coordination” has been a persistent source of legal ambiguity and political controversy.

Super PACs vs. Traditional PACs

The word “PAC” — political action committee — predates super PACs by decades. A traditional PAC is a very different kind of entity. The key differences:

A traditional PAC can give money directly to candidates, but it can only accept contributions of up to a few thousand dollars per donor per year, and it can only give a few thousand dollars to any one candidate per election. These limits are set by federal law and adjusted periodically for inflation.

A super PAC can accept and spend unlimited money but cannot give any of it to candidates directly. It can only spend it on independent activities — advertising, organizing, and so on.

A traditional PAC is the vehicle by which an industry, union, or membership organization makes legally limited, direct contributions to candidates it supports. A super PAC is the vehicle by which donors with deeper pockets fund independent campaigns of advertising and organizing around those candidates without giving them money directly.

Some organizations operate both kinds of committee, with separate accounts and separate compliance, sometimes called a “hybrid PAC” or “Carey committee.”

Super PACs vs. Dark Money Groups

The term “dark money” often gets used interchangeably with “super PAC” in news coverage and political conversation, but they are not the same thing. The distinction matters.

Super PACs disclose their donors. Every contribution above a small threshold is reported to the FEC and is publicly searchable. You can look up exactly which individuals, corporations, or unions gave money to any super PAC, and how much.

Dark money groups do not disclose their donors. These are typically organizations registered under sections 501(c)(4), 501(c)(5), or 501(c)(6) of the tax code — usually described as “social welfare organizations,” labor unions, or trade associations. Under current law, these groups can spend money on political activity (within certain limits relative to their other activities) without revealing where their funds came from.

The two worlds intersect when a 501(c)(4) gives money to a super PAC. In that case, the super PAC discloses that it received money from the 501(c)(4) — but the 501(c)(4)’s own donors remain hidden. This is the mechanism by which “dark money” enters the super PAC system, and it is a frequent target of campaign finance reform proposals.

Where the Money Comes From

Super PAC contributions come from a mix of sources, but the overall picture has been consistent across cycles: a small number of very wealthy individual donors account for the majority of the money.

Major sources include:

  • Individual mega-donors. Billionaires and very wealthy individuals giving seven-, eight-, or even nine-figure sums to super PACs aligned with their political views or interests.
  • Corporations. Either directly, in industries where corporations engage openly in politics, or indirectly through trade associations and affiliated 501(c)(4)s.
  • Labor unions. Both directly and through their general political programs.
  • Other political committees. Including transfers from other super PACs, party committees, and ideologically aligned groups.

The concentration of giving at the top is one of the defining features of super PAC fundraising. In any given cycle, a relatively small group of donors — often fewer than a hundred individuals — typically accounts for the majority of all super PAC money raised.

Where the Money Goes

Super PAC spending is heavily concentrated on a few activities:

  • Television and digital advertising is by far the largest expense, particularly in presidential and competitive Senate races.
  • Negative advertising — ads attacking the opposing candidate — historically makes up a large share of super PAC ad spending, in part because super PACs are often used to do the kind of aggressive attack work that candidates prefer not to do under their own name.
  • Field operations, including voter contact, get-out-the-vote programs, and canvassing, particularly in close races.
  • Research and polling, including opposition research and message testing.
  • Administrative and compliance costs, including fundraising, legal work, and staffing.

Different super PACs allocate their spending very differently. Some are essentially advertising machines focused on a single race. Others operate as year-round political organizations with permanent staffs and broad programs.

The Coordination Question

The prohibition on coordination between super PACs and the candidates they support is, in many ways, the central legal fiction of the post-Citizens United campaign finance system. It is also the area where the gap between the rules as written and the rules as practiced is widest.

In principle, a super PAC supporting a candidate must operate entirely independently of that candidate’s campaign. In practice, super PACs are often founded and run by former staff, close associates, or family members of the candidate they support. They use the same pollsters, consultants, and ad makers as the campaign. They post their footage, polling data, and strategic priorities to public websites — sometimes called “redboxing” — so that, technically without coordinating, the campaign can use the same materials and target the same voters.

The FEC, which is responsible for enforcing coordination rules, has been deadlocked along partisan lines for much of the period since super PACs emerged, and meaningful enforcement actions have been rare. Reformers argue that coordination rules are effectively unenforced. Defenders argue that the constitutional protections recognized in Citizens United limit how aggressively coordination can be policed without restricting protected speech.

This tension is unlikely to be resolved without either a new Supreme Court decision, a functioning bipartisan FEC, or congressional action — none of which appears imminent.

Why Super PACs Matter

Super PACs matter because they have substantially reshaped the economics and tactics of American federal elections.

They have shifted political power toward the very wealthy. Because there are no limits on how much any one donor can give, individuals with the means to write very large checks have an outsized role in funding the political conversation. A single donor can, in effect, single-handedly fund a competitive Senate campaign’s worth of advertising.

They have changed the nature of campaign advertising. Super PACs are often the vehicle through which the most aggressive negative advertising runs, allowing candidates to keep their own messaging more positive while allies attack the opposition.

They have made elections more expensive. Total spending in federal elections has risen sharply since 2010, driven in significant part by independent expenditures from super PACs and aligned groups.

They have raised durable questions about democratic legitimacy. Polling has consistently found that large majorities of Americans across the political spectrum support stricter limits on money in politics. Super PACs remain, by any measure, one of the most politically unpopular and constitutionally protected features of the current system.

Whether super PACs are a healthy expression of free speech rights or a corrosive force in democratic life is a question on which reasonable people disagree. What is not in dispute is that they have become a permanent and consequential part of how American elections work.

Frequently Asked Questions

Are super PACs legal?

Yes. Super PACs operate within the bounds of federal law and the U.S. Constitution as interpreted by the courts since 2010. The Federal Election Commission regulates them and requires regular public disclosure of their fundraising and spending.

Can a candidate have their own super PAC?

A candidate cannot legally control a super PAC, but candidates are routinely supported by super PACs that are openly aligned with them — often founded and run by their former staff, close allies, or family members. The legal prohibition is on coordination, not on alignment or sympathy.

Do super PACs have to reveal their donors?

Yes. Super PACs are required to disclose their donors to the Federal Election Commission, and those disclosures are publicly searchable. However, when a donor is itself an organization — such as a 501(c)(4) “social welfare” group — the original individual donors behind that organization may remain undisclosed. This is the “dark money” loophole.

How much money do super PACs raise and spend?

Total super PAC fundraising and spending now runs into the billions of dollars per federal election cycle, with presidential cycles drawing the largest sums. The exact figures vary by cycle and are tracked in real time by the FEC and by independent watchdog organizations such as OpenSecrets.

Can super PACs be banned?

Not under the current interpretation of the Constitution. Banning super PACs would require either a new Supreme Court decision overturning Citizens United and SpeechNow, or a constitutional amendment. Both have been proposed but neither is close to enactment.

What’s the difference between a super PAC and a campaign?

A campaign is the candidate’s own organization, which can accept only limited contributions and which the candidate directly controls. A super PAC is an independent organization that supports or opposes the candidate, can accept unlimited contributions, and cannot legally be controlled by the candidate.

Who actually runs super PACs?

Super PACs are run by political operatives, consultants, and former campaign or party staff. Many are founded by people with long careers in politics who have close — but legally separate — relationships with the candidates and causes they support.

This page is part of an ongoing, nonpartisan reference on super PACs and American campaign finance. For data on specific super PACs, see our directory of major super PACs. For definitions of related campaign finance terms, see our glossary.