Ballot initiative mechanics in Michigan
This page covers Michigan's specific rules. For the general mechanics, see how ballot initiatives work. Michigan allows citizens to propose constitutional amendments, initiated state statutes, and veto referendums.
Michigan's process
Michigan sets its thresholds as a percentage of the total votes cast for governor in the most recent gubernatorial election, so the exact signature count shifts each cycle with turnout. An initiated constitutional amendment needs 10 percent. An initiated statute needs 8 percent. A veto referendum needs 5 percent. For the 2026 cycle, the constitutional amendment threshold is 446,198 valid signatures.
Michigan has no single-subject rule, so a single petition can legally cover more than one topic, unlike most other initiative states. It also currently has no geographic distribution requirement. A 2018 law that capped signatures from any one congressional district at 15 percent was struck down as unconstitutional by the Michigan Supreme Court in January 2022, so signatures can come from anywhere in the state without a spread requirement.
Circulators have a 180-day window to collect signatures. Anything older than 180 days at filing is invalid. Constitutional amendment petitions must be filed 120 days before the targeted election. Initiated statutes, which go to the legislature first under Michigan's indirect process, must be filed 160 days before. The Bureau of Elections verifies signatures using a random sample method rather than checking each one individually.
Deadlines and numbers
- Initiated constitutional amendment: 10 percent of votes cast for governor (446,198 for the 2026 cycle)
- Initiated state statute: 8 percent of votes cast for governor
- Veto referendum: 5 percent of votes cast for governor
- Circulation window: 180 days
- Filing deadline: 120 days before the election (constitutional amendment) or 160 days (initiated statute)
- Single-subject rule: none
- Geographic distribution requirement: none, struck down January 24, 2022
Where to go
- Michigan Secretary of State, Bureau of Elections, Ballot Access: https://www.michigan.gov/sos/elections/ballot-access
- Laws governing the initiative process in Michigan (secondary reference): https://ballotpedia.org/Laws_governing_the_initiative_process_in_Michigan
- File petitions at: Bureau of Elections, Richard H. Austin Building, 430 West Allegan Street, 1st Floor, Lansing, MI 48918
Rules
Michigan is one of the more permissive initiative states on paper: no single-subject requirement and no geographic distribution rule, the latter only because the Michigan Supreme Court struck one down in 2022. That combination means a well-funded, well-organized campaign can concentrate signature-gathering in Detroit, Grand Rapids, and other population centers without needing to build capacity statewide, and can bundle multiple related or unrelated provisions into one measure.
The indirect path for initiated statutes, filing 160 days out so the legislature gets first crack at passing the measure, mirrors the Massachusetts model in spirit if not in exact mechanics. This dossier could not confirm whether Michigan charges a filing fee for initiative petitions (candidate filing fees are a separate $100 and don't apply here), and could not independently pin down the exact 2026 signature count for the initiated-statute track, only the 8 percent formula. For help building a Michigan campaign, see /engage.