The California ballot initiative process lets registered voters put a proposed law, constitutional amendment, or recently passed statute directly to a statewide vote, but it runs on a fixed sequence: draft the measure, file it with the Attorney General with a $2,000 fee, wait through a review period that produces an official title and summary, then collect enough valid voter signatures within 180 days to qualify for the next eligible election.1California Secretary of State. Statewide Initiative Guide 2026 Miss a deadline, misdraft the text, or fall short on signatures, and the measure is finished.
Decide What You’re Actually Filing
Three different vehicles get used, and the one you pick dictates how many signatures you need and what you can accomplish.
- An initiative statute creates a new law or changes an existing one. It needs signatures equal to 5% of the votes cast for Governor in the last gubernatorial election.
- An initiative constitutional amendment changes the California Constitution itself. The signature bar is 8% of votes cast for Governor.
- A referendum challenges a law the Legislature recently passed, pausing it until voters decide whether to keep or reject it. Signature threshold is 5%.
Based on the 2022 gubernatorial election, initiative statutes and referendums currently require 546,651 valid signatures, and constitutional amendments require 874,641.1California Secretary of State. Statewide Initiative Guide 2026
Filing With the Attorney General
Before you can collect a single signature, you file your proposed measure with the Office of the Attorney General. The package includes the full text of the measure, required certifications, and a $2,000 fee that gets refunded if the measure ultimately qualifies for the ballot.2California Department of Justice – Office of the Attorney General. Ballot Initiatives
The text you file is essentially final. You cannot change it once the Attorney General issues the official summary. That is why serious campaigns retain election law attorneys for drafting: a poorly worded provision will be enforced literally by courts, or it will create an opening for a legal challenge that kills the measure before voters ever see it.
The Review Period: Title, Summary, and Fiscal Impact
Once your filing is received, a 30-day public review period begins. The text goes online and anyone can submit written comments.3California Legislative Information. California Code Elections Code 9002 At the same time, the Legislative Analyst’s Office and the Department of Finance prepare a fiscal impact estimate.
After the Attorney General receives that fiscal estimate, they have 15 days to finalize the official circulating title and summary.4California Legislative Information. California Code Elections Code 9004 This language is neutral by rule and appears on every petition page circulators carry, so every voter asked to sign sees the same official description. You have no control over how the Attorney General frames the measure. The public comment window is the only formal chance to flag concerns before the summary is locked in.
The Single-Subject Rule
California’s constitution prohibits initiative measures that cover more than one subject. Article II, Section 8(d) states that a multi-subject initiative cannot be submitted to voters and has no legal effect even if it reaches the ballot and passes.5Justia Law. California Constitution Article II Section 8 The rule prevents bundling popular provisions with unpopular ones to force an all-or-nothing choice.
Courts ask whether the parts of a measure share a reasonably common theme. The standard is flexible, and judges have upheld measures with wide-ranging provisions when all of them relate to one broad policy goal. A measure that tries to reform education funding and overhaul criminal sentencing at the same time would face a serious challenge. Opponents can raise this challenge before the election to block the measure or after the election to invalidate it. It is one of the most common grounds for litigation.
Collecting Signatures in 180 Days
Once the Attorney General issues the official title and summary, the clock starts. You have exactly 180 days to circulate petitions, gather signatures from registered voters, and file completed petitions with county elections officials.1California Secretary of State. Statewide Initiative Guide 2026 There are no extensions. One day late ends the effort.
Petition sections are filed with the elections official in the county where the signatures were collected, and all sections from a given county must be filed at the same time.6California Legislative Information. California Code Elections Code 9030 Once filed, petition sections cannot be amended except by court order.
Target Well Above the Minimum
The raw number of signatures you collect needs to be well above the legal minimum. Signatures from unregistered voters, duplicate signers, and illegible entries get thrown out during verification. Experienced campaigns submit 20% to 30% more than the threshold to build a cushion. For an initiative statute in 2026, that means targeting roughly 650,000 to 710,000 raw signatures rather than the bare 546,651.1California Secretary of State. Statewide Initiative Guide 2026
Rules for Paid Circulators
Most statewide campaigns hire professional signature-gathering firms, and the rules for paid circulators are specific. Before soliciting any signatures, each paid circulator must sign an oath acknowledging that it is a misdemeanor to allow petition signatures to be used for any purpose other than qualifying the measure. Whoever manages signature collection must keep those signed oaths on file for at least eight months after election results are certified. Volunteer circulators are exempt from the oath requirement.7California Legislative Information. California Code Elections Code 9610
Petitions must include a disclaimer stating that the circulator may be paid and that signers can ask whether the circulator is receiving payment. Large paid campaigns also have to comply with “Official Top Funders” rules, which require a printed box on the first page of each petition identifying the committee paying for circulation and its major donors. The font must be at least 14-point, with specific formatting for the committee name and top contributors.
Signature Verification
After petitions are filed, county elections officials have eight business days to count raw signatures and report the totals to the Secretary of State.6California Legislative Information. California Code Elections Code 9030 If the statewide raw count falls below 100% of the required number, the measure fails and no further verification happens.
When the raw count meets or beats the threshold, the Secretary of State orders a random sample verification. Counties pull a statistical sample and check signatures against voter registration records, with 30 working days to finish.8California Secretary of State. CCROV 18091 – Initiative and Referendum Petitions Random Sampling and Full Check Procedures A projected validity rate above 110% of the requirement qualifies the measure. Below 95% disqualifies it. Anything between those two numbers triggers a full signature-by-signature check.
Campaign Finance Obligations
Any person or group that receives $2,000 or more in a calendar year for the qualification, passage, or defeat of a ballot measure becomes a ballot measure committee with mandatory reporting duties under California law. Each time such a committee spends $5,000 or more supporting or opposing qualification or passage of a state measure, it must file a report within 10 business days.
Reports have to identify the committee, describe the measure, and itemize contributions of $100 or more with the date, amount, and the name and address of each donor. Expenditures need the same level of detail. Filings go to the Fair Political Practices Commission. Penalties for late or missing filings are significant, so designate a compliance officer or retain a treasurer experienced in ballot measure reporting before the money starts moving.
When the Measure Goes to Voters and Takes Effect
A qualified measure appears on the ballot at the next general election held at least 131 days after qualification, unless the Governor calls a special statewide election for it.5Justia Law. California Constitution Article II Section 8 Passage requires a simple majority of the votes cast on that specific measure. If two measures on the same ballot contain conflicting provisions and both pass, the one with more “yes” votes prevails where they conflict.9Justia Law. California Constitution Article II Section 10
A successful measure takes effect on the fifth day after the Secretary of State files the official statement of the vote.9Justia Law. California Constitution Article II Section 10 You can write a later effective date into the measure’s text if implementation needs lead time.
Legal Challenges to Plan For
Measures face legal attack from several angles. Single-subject challenges are the most common pre-election basis, but opponents may also argue that the Attorney General’s title and summary is misleading, that petition format violated disclosure requirements, or that the measure would violate the federal or state constitution if enacted.
Pre-election challenges try to keep a measure off the ballot. Courts can review whether it embraces a single subject, whether the title accurately described the proposal, and whether signature-gathering procedures were followed. Post-election challenges target measures that have already passed, arguing the enacted law conflicts with federal law, violates equal protection, or exceeds the scope of the initiative power. California courts have historically been reluctant to remove qualified measures before an election, preferring to let voters decide and address constitutional issues afterward. That tendency is not a guarantee.
Every word in the measure is potential ammunition for opponents. Vague provisions invite enforceability challenges. Broad provisions invite single-subject attacks. Investing in experienced election law counsel during drafting saves exponentially more in post-election litigation.