Missouri campaign finance reports go through the Missouri Ethics Commission's online eFiling portal at mec.mo.gov, and the report type you owe depends on whether you're running a candidate committee or a continuing committee like a PAC. Candidate committees file quarterly disclosure reports plus extra reports tied to an election, while continuing committees file on a fixed quarterly calendar all year. The number most campaigns miss isn't the quarterly deadline — it's the 48-hour notice Missouri requires for contributions of $5,000 or more received in the 14 days before an election.
- File your missouri campaign finance report through the Missouri Ethics Commission’s eFiling system, not by paper, once your committee is registered.
- Candidate committees owe quarterly reports plus an 8-day pre-election and 30-day post-election report in election years.
- Continuing committees (PACs, party committees) file four fixed reports a year: January 15, April 15, July 15, October 15.
- Contributions of $5,000 or more received within 14 days of an election trigger a separate 48-hour notice — quarterly filing does not cover it.
- Late reports accrue a daily fee from MEC regardless of office sought, from school board to statewide.
Why this matters
Missouri Ethics Commission compliance isn't optional paperwork you get to later — it's a public record that opponents, reporters, and the MEC itself check against your bank statement. A missed report or a mismatched total triggers a fee that accrues daily and a public compliance flag next to your candidate name on the MEC website.
Most first-time Missouri candidates lose time on this not because the rules are complicated, but because nobody on staff owns the calendar. If you haven't already mapped every due date against your election, track your campaign filing deadlines before you build anything else — the reporting schedule dictates when you need clean books, not the other way around.
How to file a campaign finance report in Missouri
The process is the same whether you're filing your first report or your tenth:
- Register your committee first. File a Statement of Organization with the Missouri Ethics Commission before you raise or spend a dollar — this creates your MEC committee ID and eFiling login.
- Set up eFiling credentials. MEC assigns a username and password tied to your committee ID; this is the only account that can submit a valid report.
- Reconcile before you file, not after. Match every contribution and expenditure line against your campaign bank statement. A report that doesn't tie out to the bank triggers questions from MEC and from opponents digging through public filings.
- Enter contributions and expenditures in the eFiling system. Itemization thresholds apply — smaller contributions can be aggregated, larger ones need donor name, address, occupation, and employer.
- Submit before 11:59 p.m. on the due date. Missouri's eFiling system timestamps submissions; a report filed one minute after midnight counts as late.
- Amend immediately if you find an error. MEC allows amended reports, and filing a correction on your own beats having MEC or a reporter find the discrepancy first.
Verdict: the eFiling system is mandatory for any committee with meaningful activity, and treating it as an afterthought is how campaigns end up with late fees in an election year.
Candidate committees vs. continuing committees
| Filer type | Reports owed | When |
|---|---|---|
| Candidate committee | Quarterly + 8-day pre-election + 30-day post-election | Jan 15, Apr 15, Jul 15, Oct 15, plus election-tied dates |
| Continuing committee (PAC, party committee) | Quarterly, year-round | Jan 15, Apr 15, Jul 15, Oct 15 |
| Any committee, any type | 48-hour notice | Within 48 hours of receiving $5,000+ in the 14 days before an election |
A candidate committee in an off-year with no election on the ballot still files the four quarterly reports — the extra 8-day and 30-day reports only apply in the year you're actually on a ballot.
Candidate committees: quarterly reports plus election-tied filings
If you're a candidate for any Missouri office — state representative, county commissioner, school board, or statewide office — your committee files the standard quarterly reports (January 15, April 15, July 15, October 15) every year it's registered and active. In a year you appear on a ballot, two more reports get added: one due 8 days before the election and one due 30 days after. Skipping the 8-day report is the single most common compliance miss because campaigns are focused on turnout, not paperwork, in that final stretch.
Continuing committees: four fixed reports a year
PACs, state and county party committees, and other continuing committees don't get an election-year exemption or addition — they file the same four quarterly reports every year regardless of whether their candidates are on the ballot. That predictability makes continuing committee compliance easier to automate than candidate committee compliance, since the calendar never shifts. PAC treasurers running multiple candidate relationships still need to keep contribution and expenditure records clean enough to reconcile fast; campaign finance software built for PAC treasurers exists specifically because manual spreadsheets fall apart once a PAC is supporting more than one race at a time.
Why Missouri filing requirements vary by campaign
Not every Missouri campaign owes the same reports on the same schedule. The variation comes down to a handful of factors:
- Office sought — statewide, legislative, and local candidates all register with MEC, but local judicial and school board races sometimes carry different thresholds for what counts as a reportable contribution.
- Whether an election falls in the current year — election-year candidates carry the 8-day and 30-day reports on top of the standard quarterly cycle; off-year candidates don't.
- Contribution size and timing — any contribution of $5,000 or more landing in the 14 days before an election forces a 48-hour notice independent of the quarterly report.
- In-kind contributions and debt — non-cash contributions and outstanding loans require additional disclosure detail beyond a simple cash ledger. If your committee has taken in donated services or goods, disclosing in-kind contributions correctly on the report matters as much as the cash totals.
- Committee status — active, dormant, and terminating committees each have different filing obligations; a committee that hasn't formally terminated with MEC keeps owing quarterly reports even with zero activity.
Stop chasing your own filing calendar
See how campaigns track contributions, expenditures, and MEC deadlines in one system.
Do I have to file a Missouri campaign finance report if I raised no money?
Yes — a registered committee with zero activity still files, because Missouri requires reports based on your committee's registration status, not your fundraising total. A "no activity" report is still a legal filing; failing to submit it counts the same as failing to file a report with $50,000 in contributions.
What happens if I file a Missouri campaign finance report late?
A late report starts accruing a daily fee from the Missouri Ethics Commission the moment the deadline passes, and it does not reset until the report is submitted. Repeated late filings or unresolved fees can be referred for further enforcement, and the missed filing shows up as a public flag on your MEC record for the duration of the race.
Who has to register a campaign committee with the Missouri Ethics Commission?
Any candidate for state or local office in Missouri who intends to raise or spend money on their campaign has to register a committee with MEC before accepting contributions. Political action committees, party committees, and ballot measure committees register separately as continuing committees under the same statute.
FAQ
How often does a Missouri candidate file a campaign finance report?
A Missouri candidate files quarterly reports on January 15, April 15, July 15, and October 15 every year the committee is active. In election years, an 8-day pre-election report and a 30-day post-election report get added on top of that schedule.
Where do I file a Missouri campaign finance report?
Missouri campaign finance reports are filed through the Missouri Ethics Commission’s eFiling system at mec.mo.gov. Paper filing is not the standard path once a committee is registered and active.
What triggers a 48-hour notice in Missouri campaign finance reporting?
A contribution of $5,000 or more received within 14 days of an election triggers a 48-hour notice separate from the regular quarterly report. This applies to candidate committees and continuing committees alike.
Is a Missouri campaign finance report public record?
Yes, every report filed with the Missouri Ethics Commission is public and searchable on the MEC website. Opponents, reporters, and voters can view contribution and expenditure detail line by line.
Do PACs file the same Missouri campaign finance reports as candidates?
No, continuing committees like PACs file four fixed quarterly reports year-round with no election-year additions. Candidate committees add an 8-day and 30-day report in years they’re on the ballot.
Can I amend a Missouri campaign finance report after filing?
Yes, the Missouri Ethics Commission’s eFiling system allows amended reports when an error is found. Filing the correction voluntarily is treated far better than having MEC or a reporter catch the discrepancy.
What happens if my Missouri committee has no contributions to report?
A registered committee still must file a "no activity" report on schedule even with zero contributions or expenditures. The obligation is tied to registration status, not fundraising totals.
One last thing
The report campaigns forget isn't a quarterly deadline — it's the 48-hour notice for large late contributions. A campaign can file every quarterly report on time in 2026 and still end up out of compliance because a $10,000 check landed nine days before Election Day and nobody flagged it for the separate 48-hour filing. Build that check into your intake process the day you open a donation form, not the week before the election.
Related guides
- How to file a campaign finance report in Florida
- How to train a campaign treasurer on compliance reporting
