PAC Independent Expenditure Reporting: 24- and 48-Hour Rules
Federal election law imposes accelerated disclosure requirements on political action committees that make independent expenditures close to an election — obligations that operate on timelines of 24 or 48 hours rather than the standard quarterly or monthly filing schedule. These rules, administered by the Federal Election Commission (FEC), are designed to ensure that large, last-minute independent expenditures reach the public record before voters cast ballots. Understanding which threshold applies, when the clock starts, and what information must be reported is essential for any PAC treasurer managing activity in the final weeks of a federal campaign cycle. A full orientation to PAC regulatory obligations is available at the PAC Authority index.
Definition and scope
An independent expenditure, as defined under 52 U.S.C. § 30101(17), is an expenditure for a communication expressly advocating the election or defeat of a clearly identified federal candidate, made without coordination with any candidate, authorized committee, or political party. The accelerated reporting rules apply when such expenditures cross specific dollar thresholds within designated time windows before a primary, general, special, or runoff election.
The two distinct rules are:
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48-Hour Rule — Applies to independent expenditures of $10,000 or more in the aggregate, made at any point during a calendar year but outside the final 20 days before an election. The reporting entity must file within 48 hours of the expenditure being made or obligated (FEC, 11 C.F.R. § 104.4(b)).
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24-Hour Rule — Applies to independent expenditures of $1,000 or more in the aggregate, made within the final 20 days before an election (including Election Day itself). The filing deadline compresses to 24 hours from the time the expenditure is made or obligated (FEC, 11 C.F.R. § 104.4(c)).
Both rules apply on a cumulative basis. Once the threshold is crossed for a particular election cycle and candidate, each additional dollar spent in support of or opposition to that candidate triggers a new filing obligation.
The rules cover all PAC types that make independent expenditures — nonconnected PACs, connected PACs, Super PACs, and leadership PACs. For PAC-specific structural context, see types of PACs and PAC independent expenditures explained.
How it works
When a PAC makes or obligates an independent expenditure, the treasurer must track the running aggregate total for each candidate and each election. The sequence below outlines the operational mechanics:
- Expenditure is made or obligated. The clock starts at this point — not when a vendor is paid or when a communication runs.
- Aggregate threshold is assessed. The treasurer checks whether cumulative spending for that candidate in that election now meets or exceeds $10,000 (48-hour trigger) or $1,000 within the 20-day window (24-hour trigger).
- FEC Form 24 is prepared. This is the designated form for independent expenditure reports filed under the accelerated schedule. It requires the name of the candidate, the office sought, whether the expenditure supports or opposes the candidate, the amount, the payee, the purpose, and the date.
- Electronic filing is required for PACs that have already crossed the $50,000 aggregate contributions or expenditures threshold in a calendar year. Most active PACs file electronically via the FEC's online filing system.
- The report is submitted within the applicable window. FEC rules measure the 24- or 48-hour period from the moment the expenditure is made or obligated.
Every subsequent expenditure of $1,000 or more for that candidate within the 20-day window — regardless of whether it stands alone or adds to a prior filing — restarts a new 24-hour clock for that incremental amount.
Common scenarios
Scenario A — Pre-election broadcast buy: A nonconnected PAC contracts with a television station on October 20 for $75,000 in airtime running an ad opposing a U.S. Senate candidate, with the general election on November 5. The expenditure falls within the 20-day window. The full $75,000 is reported on FEC Form 24 within 24 hours of the contract being signed.
Scenario B — Early-cycle digital campaign: The same PAC spends $12,000 on digital advertising supporting a House candidate in August, with the primary scheduled for September 10. August spending falls outside the 20-day window, so the 48-hour rule applies. A Form 24 report is due within 48 hours of the expenditure reaching $10,000.
Scenario C — Staggered late spending: A Super PAC spends $800 on October 28 in opposition to a presidential candidate, then $600 more on October 30. Neither payment alone crosses $1,000, but the aggregate crosses $1,000 on October 30 — triggering the 24-hour clock from that second expenditure. The FEC's guidance on Super PAC fundraising and spending rules addresses related obligations.
Decision boundaries
The distinction between the 24-hour and 48-hour rules turns on two variables: the dollar amount and the proximity to the election. The table below summarizes the contrast:
| Rule | Threshold | Time Window | Filing Deadline |
|---|---|---|---|
| 48-Hour | $10,000 aggregate | Any time outside final 20 days | Within 48 hours |
| 24-Hour | $1,000 aggregate | Within 20 days of election | Within 24 hours |
A single expenditure can trigger both rules sequentially if a PAC crosses $10,000 in early spending and then continues into the 20-day window. The PAC files under the 48-hour rule when the early aggregate hits $10,000, then shifts to the 24-hour rule for all subsequent increments of $1,000 or more once inside the 20-day period.
Coordination is a categorical exclusion. Any disbursement made in coordination with a candidate's campaign is classified as a contribution under 52 U.S.C. § 30116 and reported on a standard periodic report, not Form 24. The FEC's PAC coordination rules govern that boundary.
Electioneering communications — broadcast, cable, or satellite ads referencing a federal candidate within 30 days of a primary or 60 days of a general election — carry separate disclosure requirements and are not subject to the 24/48-hour independent expenditure framework unless they also qualify as express advocacy. See PAC electioneering communications for the parallel structure.
Penalties for late or missed accelerated filings fall under the FEC's civil enforcement authority. The FEC's general PAC reporting requirements page addresses the broader schedule within which these accelerated reports operate.