What Is a PAC and How Does It File With the FEC?

If you’ve just been named treasurer of a new political action committee or you’re helping launch one, the regulatory side of the job can feel like a steep learning curve. Let’s cover the basics: what is a PAC, how is it structured under FEC rules, and what will your filing obligations look like from day one.

What Is a Political Action Committee? The Short Answer

PAC stands for political action committee. A PAC is any organization formed to raise and spend money to influence federal elections. Under the Federal Election Campaign Act (FECA), a group becomes a federal political committee and must register with the FEC once it raises or spends more than $1,000 in a calendar year for the purpose of influencing a federal election.

That threshold is lower than most people expect. You don’t need to be a major corporation or a well-funded advocacy organization to trigger registration. A small group of individuals pooling resources to support or oppose a candidate can cross it quickly.

The term “PAC” is colloquial; the FEC uses more precise categories, and the category your committee falls into determines your contribution limits, who you can solicit, and what forms you file.

What Does PAC Stand For and What Is a PAC in Politics?

PAC stands for “political action committee,” a term that’s been part of American campaign finance since the 1940s. In contemporary usage, it broadly refers to any registered political committee that operates outside a candidate’s authorized campaign structure. That includes everything from a corporate separate segregated fund to an independent issue advocacy group to a congressional leadership PAC.

A PAC in politics refers to one of two categories: a traditional PAC (subject to contribution limits) or a Super PAC (which operates differently, more on that below). Both are registered with the FEC, but their rules diverge significantly.

PAC vs. Super PAC: What’s the Difference?

The distinction between a PAC vs. Super PAC is one of the most common points of confusion for people new to campaign finance.

A traditional PAC can contribute directly to candidates, but FEC guidelines limit what individuals can give to a traditional PAC ($5,000 per year) and what a PAC can give to a candidate ($5,000 per election). These limits are not indexed for inflation and have remained unchanged for many years.

A Super PAC can raise and spend unlimited amounts, but it cannot donate directly to a candidate’s campaign or coordinate with one. Its spending is limited to independent expenditures, things like advertising that expressly advocate for or against a candidate without any coordination with the campaign.

To summarize, if your committee wants to write checks directly to candidates, it needs to operate as a traditional PAC within contribution limits. If it wants to run large-scale independent advertising, a Super PAC structure may be more appropriate, but the prohibition on coordination is strict and enforced.

How To Start a PAC: Registration Basics

Getting a PAC formally registered involves a few concrete steps.

• Designate a treasurer. A PAC cannot legally accept contributions or make expenditures until a treasurer has been named. The treasurer is personally responsible for the accuracy and timeliness of all FEC filings. This is not a nominal role.
• Obtain an EIN. Before opening a bank account, the PAC needs an Employer Identification Number from the IRS. Note that the EIN is separate from the FEC committee ID you’ll receive after registration. You’ll need both.
• Open a dedicated bank account. All PAC receipts and disbursements must flow through a bank account that is separate from any personal or organizational accounts. The account should be in the PAC’s name.
• File FEC Form 1 (Statement of Organization). Once the committee crosses the $1,000 threshold in contributions or expenditures, it must register with the FEC within 10 days by filing a Statement of Organization. Form 1 collects the committee’s name, address, type, treasurer information, and any affiliated committees. If any of that information changes later, including the treasurer’s name or address, the committee must amend its Form 1 within 10 days of the change.

The FEC assigns a unique committee identification number (formatted as C00xxxxxx) after Form 1 is processed. That ID must appear on all future filings.

What a PAC Is Required To File With the FEC

Once registered, a federal PAC files periodic financial reports using FEC Form 3X, the Report of Receipts and Disbursements for Other Than an Authorized Committee. Form 3X discloses all contributions received and disbursements made during the reporting period.

PACs file on either a quarterly or monthly schedule, which they elect when they register (and can change no more than once per year via Form 99). The schedules differ in their deadlines and complexity, particularly in election years.

Quarterly filers report four times per year, with reports due on April 15, July 15, October 15, and January 31. During election years, quarterly filers that make contributions or expenditures in connection with a specific election must also file pre-election reports if that activity wasn’t previously reported, which means tracking primary and special election dates in every state where the PAC is active.

Monthly filers submit reports by the 20th of the following month. In election years, monthly filers replace their November and December reports with a pre-general and post-general report. Many active PACs prefer monthly filing to avoid the complexity of tracking pre-election triggers across multiple races.

Beyond regular reports, PACs that make independent expenditures above certain thresholds must file real-time disclosure reports. A 48-hour report is triggered when IEs aggregate $10,000 or more for a given election at any point during the calendar year up to the 20th day before that election. A 24-hour report is triggered when IEs aggregate $1,000 or more after that 20th-day threshold but more than 24 hours before the election itself. Both are filed on Schedule E of Form 3X and are due within the specified window after the communication goes public. These are time-sensitive and easy to miss without automated monitoring.
For current filing deadlines, ISPolitical maintains an FEC Filing Deadlines resource with upcoming due dates for Form 3X and other required reports.

Contribution Limits: What a Traditional PAC Can Receive and Give

Traditional PACs (connected and nonconnected) operate under a defined set of contribution limits under FEC guidelines. For the 2025–2026 election cycle, for example:

• Individuals may contribute up to $5,000 per year to a federal PAC. This limit is not indexed for inflation.
• A federal multicandidate PAC may contribute up to $5,000 per election to a federal candidate (with separate limits for primary and general elections).
• A PAC that has not yet qualified as a “multicandidate committee” (which requires being registered for at least 6 months, receiving contributions from more than 50 people, and making contributions to 5 or more federal candidates) may contribute up to $3,500 per election to a federal candidate. This is the same limit that applies to individuals.

Super PACs, as noted above, can accept unlimited contributions but cannot contribute directly to candidates.

Recordkeeping Requirements PAC Treasurers Often Underestimate

Filing accurate reports requires accurate records, and the FEC’s recordkeeping requirements are more detailed than many new treasurers expect.

For any contribution of $50 or more, the PAC must collect and retain the contributor’s name, address, occupation, and employer. For contributions of $200 or more in aggregate from a single source within a calendar year, that itemized information must be disclosed on FEC reports.

All records, including bank statements, contribution records, and disbursement receipts, must generally be retained for three years from the date of filing the report that covers them.

Failure to itemize contributions correctly, or to identify prohibited contributions (from foreign nationals, federal contractors, or over-limit donors), is one of the most common triggers for FEC Requests for Additional Information (RFAIs), and responding to one is far more time-consuming than getting the original filing right.

What Happens if a PAC Misses a Filing Deadline?

The FEC administers an Administrative Fine Program for late or non-filed reports. Fines are calculated based on the committee’s financial activity during the reporting period. The larger the receipts and disbursements, the larger the potential fine. Late 24- and 48-hour independent expenditure reports are handled separately through enforcement, not the Administrative Fine Program, and can result in more significant penalties.

The key thing to understand is that the treasurer is personally responsible for both the accuracy and timeliness of all filings. That’s not just regulatory language; the FEC has assessed personal liability against treasurers in enforcement cases.