Most Americans have a gut-level sense that campaign money is regulated. There are “limits,” there are “PACs,” and somewhere in the background the Federal Election Commission is supposed to be watching the books.
All of that is true. It is also incomplete.
Federal campaign finance law is less like one clear rule and more like a map of lanes: one lane for contributions to candidates, another for party committees, another for political committees, and another for spending that is legally “independent.” Disclosure rules follow those lanes, too. Some money is reported quickly and in detail. Other money shows up later, indirectly, or not at all.
This page explains the basics: who can give, how contribution limits work at a high level, and how disclosure is supposed to let the public track political money. For deeper dives on PACs, Super PACs, and Citizens United, see our dedicated pages on those topics.
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The constitutional backdrop
The Constitution does not contain a “campaign finance clause.” The modern rules are built from statutes, mainly the Federal Election Campaign Act (FECA), and Supreme Court cases interpreting the First Amendment.
The Court has drawn a core distinction that still shapes everything:
- Contributions given to a candidate or political committee can be limited more aggressively, because contributions are treated as creating risks of corruption or its appearance.
- Independent expenditures spent independently to advocate for or against candidates receive stronger First Amendment protection, and broad limits on them are generally unconstitutional.
That difference is why candidates face hard contribution caps while outside groups can sometimes spend unlimited amounts independently. It is also why disclosure has become the policy tool that is supposed to keep voters informed even when spending cannot be capped.
Who can give in federal elections
Federal law draws bright lines about which sources of money are allowed and which are prohibited. Some of these rules are intuitive. Others surprise people because they run in the opposite direction of common assumptions.
Individuals (U.S. citizens and lawful permanent residents)
Individuals can contribute to federal candidates, party committees, and many political committees, subject to dollar limits and reporting rules.
Key concept: limits usually apply per election, not per calendar year, meaning a primary and a general election are often treated as separate buckets.
Another common misconception: there is no overall “aggregate” limit on how much an individual can give across all federal candidates and committees combined. The caps are generally per recipient and per election.
Corporations and labor unions
Corporations and unions generally cannot contribute directly to federal candidates from their treasury funds.
They can, however, participate in politics in other ways. For example, they may sponsor connected PACs (often called segregated fund PACs or SSFs) funded by voluntary contributions from eligible individuals associated with the corporation or union. Under current law, corporations and unions may also use treasury funds for certain independent spending, subject to reporting rules and other restrictions.
Foreign nationals
Foreign nationals are prohibited from making contributions or expenditures in connection with U.S. federal, state, or local elections. This ban is broad and includes many forms of election-related spending.
It also reaches involvement beyond writing a check. Foreign nationals generally may not direct, control, or participate in decisions about certain political spending by others. This is why U.S.-incorporated entities can still face foreign national restrictions when foreign nationals are involved in spending decisions.
Federal government contractors
Federal contractors are prohibited from making contributions to federal candidates, national party committees, and many political committees while a covered federal contract is in place. The restriction is aimed at pay-to-play risks where government money and campaign money could become intertwined.
The details can be nuanced, especially for individuals who are contractors, entities with complex ownership structures, and questions about when a contract begins and ends. When in doubt, campaigns and donors typically treat contractor status as a high-risk compliance area and seek counsel.
Minors
Minors can contribute, but the money must truly be the minor’s own and not a parent’s contribution routed through a child. Campaigns are expected to have reason to believe the funds are the minor’s and that the minor is not being used as a conduit.
Quick map: who is who
A lot of confusion comes from the fact that “political money” flows through different kinds of organizations, each with its own rules. At a high level:
- Candidate committees: the official committees authorized by a candidate. They take contributions that are capped per election and file detailed reports.
- Party committees: national, state, and local party organizations. They have their own contribution limits and spending rules.
- PACs (traditional political committees): committees that can contribute to candidates (subject to caps) and must report donors and spending under FEC rules.
- Super PACs (independent-expenditure-only committees): committees that can raise and spend unlimited amounts for independent spending, but cannot give to candidates and cannot coordinate with them.
- Nonprofits and other entities: some politically active groups (including certain 501(c) organizations and 527 groups) may spend on elections under different disclosure regimes, sometimes reporting primarily to the IRS and sometimes triggering FEC reporting depending on the activity.
This page focuses on the shared architecture. The dedicated pages go deeper into the specific committee types.
What “contribution limits” actually limit
Contribution limits are not one number. They are a system that varies by:
- Recipient (candidate vs party committee vs political committee)
- Type of election (primary vs general vs special)
- Donor type (individual vs committee)
- Election cycle (limits are indexed and can change over time)
Because the exact dollar amounts update regularly, the most durable way to understand limits is to understand the structure.
Candidate committees
Contributions to a candidate’s authorized committee are tightly capped. The cap is usually stated as a dollar limit per election.
Practical example: if you give the maximum for the primary, that does not automatically mean you have maxed out for the general election. Those are treated separately.
National and state party committees
Party committees have their own limit structure, separate from candidate limits. A person can often give more to a party committee than to a candidate, and the party may then spend within its own legal channels.
Some party spending is coordinated with candidates and falls under separate coordinated party expenditure limits. By contrast, if a non-party outside group coordinates spending with a candidate, that spending can be treated as an in-kind contribution subject to the applicable contribution limit and source restrictions.
Traditional PACs and other political committees
Many political committees can contribute to candidates, but their contributions are capped. These committees also face rules on who may fund them and how they must report their receipts and disbursements.
For how PACs are formed and how different PAC types operate, see our PAC and Super PAC pages rather than treating this as a substitute.
Per election, not per person: the “buckets” that confuse everyone
The most common misunderstanding is thinking there is one personal cap on “what you can give.” In federal law, limits are usually about what you can give to a particular recipient for a particular election.
- Per election: primary and general limits are separate.
- Per committee: giving to Candidate A does not affect your limit to Candidate B.
- Separate entities: the candidate committee and the party committee are different recipients with different caps.
Mini-scenario: one donor can legally give (1) up to the limit to a House candidate’s primary, (2) up to the limit again to that same candidate’s general election, (3) up to the party committee limit to the national party committee, and (4) up to the PAC limit to a traditional PAC. Those are different buckets with different reporting paths, even though they are all “political giving.”
There are also “earmarked” contributions, where a donor gives to an intermediary with a directive to pass the funds to a specific candidate. Those are treated, in effect, like a contribution to the candidate and count toward the donor’s candidate limit.
What must be reported: disclosure at a high level
At the federal level, much of the standardized election disclosure runs through the FEC. Candidates and most committees file periodic reports listing:
- Receipts (money coming in)
- Disbursements (money going out)
- Debts and obligations
- Cash on hand
When a contribution is large enough to trigger itemization rules, reports typically include identifying details such as the donor’s name, address, occupation, and employer, along with the date and amount. In general, itemization is triggered when a donor’s contributions exceed $200 in the aggregate to that committee for the election cycle.
Timing: reports are not real time
Disclosure often feels late because it is structured around reporting periods. During the final weeks of a campaign, additional “late contribution” and “independent expenditure” reports may be required, but the overall system still operates in batches.
Different reporting triggers for ads
Outside groups that spend on federal elections often report their activity to the FEC, but the trigger and format can differ depending on the kind of communication. Two common buckets are independent expenditures (typically express advocacy) and electioneering communications (certain broadcast, cable, or satellite ads close to an election). These categories can carry different filing rules and timelines.
Disclosure is about the spender, not always the original source
Here is the key point voters run into: disclosure laws often tell you who spent the money, but not always where that spender got its money.
If an individual donates directly to a candidate committee, the original source is usually visible in itemized reports.
If money flows through intermediaries, what you see depends on the legal identity of the entity that is required to disclose and the specific donor disclosure triggers that apply to that spending. Some gaps are built into statutory design, and others reflect how regulations, enforcement practices, and court decisions define when donor disclosure is required.
Why “dark money” exists in a disclosure system
Some politically active nonprofits are allowed to engage in political activity without publicly disclosing all donors, depending on the organization type and the nature of the spending. When such a group spends on politics, voters may be able to see the group’s name but not the people financing it.
Separately, even when an entity reports donors, the rules can vary on which donors must be disclosed in connection with a particular ad buy. In other words, disclosure can be real and still incomplete.
Independent spending and coordination
Independent expenditures are political spending that is not coordinated with a candidate or campaign. This concept is central because:
- Independent spending is generally protected from broad dollar limits under current First Amendment doctrine.
- Independent spending still triggers reporting requirements in many cases.
- If “independent” spending is actually coordinated, it can be treated as an in-kind contribution, which is subject to contribution limits and other restrictions.
The coordination line is where enforcement and real-world incentives collide. Campaigns have strong reasons to want allies spending on their behalf. The legal system has strong reasons to keep “independent” from becoming a meaningless label.
Our Super PAC and Citizens United pages focus on the constitutional story that created the modern independent-expenditure ecosystem. This page is the companion: the rules that still apply even in that world.
Common terms in FEC reports
Itemized vs unitemized
Small contributions can be grouped as unitemized totals. Larger ones must be listed with donor information. That is why a report might show a large unitemized number next to a list of named donors.
In-kind contributions
Not all contributions are cash. Goods and services provided to a campaign, such as printing, staff time, or venue support, can count as contributions and are subject to limits and reporting.
Refunds and redesignations
If a donor exceeds a limit, the campaign typically must refund the excess or take steps to redesignate the contribution to a different election if rules allow and timing requirements are met.
Bundling
Bundling is when an intermediary collects contributions from many donors and delivers them to a campaign. The money is still attributed to the original donors for limit purposes, but bundling can signal influence because it shows who can deliver a network of donors.
What this system can and cannot do
Campaign finance law is often described as an anti-corruption system. It is also, just as importantly, an information system. The promise is not only “you cannot give more than X,” but also “voters can see who is funding whom.”
In practice, the system can do some things well:
- It can cap direct contributions to candidates.
- It can require campaigns and many committees to file standardized reports.
- It can make many forms of spending visible, even when they cannot be limited.
It also has built-in limits:
- Disclosure is periodic, so it often arrives after key moments.
- Some funding sources remain obscured when routed through entities that do not publicly disclose donors.
- Enforcement is only as strong as the agencies, rules, and political will behind it. The FEC’s structure, including an even number of commissioners and a three-vote requirement for many actions, can contribute to stalemates in closely contested cases.
If you want to understand what changed after Citizens United, look at independent spending. If you want to understand what did not change, look at contribution limits to candidates. The tension between those two realities is where modern campaign finance debates live.