CCP 430.10: Demurrer Grounds, Deadlines, and Meet-and-Confer

California Code of Civil Procedure section 430.10 sets out the eight grounds a defendant can use to attack a complaint, cross-complaint, or other pleading through a demurrer. The grounds run from the court lacking subject matter jurisdiction to the pleading failing to state a valid legal claim, and each one lets the defendant challenge the pleading itself without disputing the underlying facts.

What a Demurrer Does

A demurrer is a formal objection that a pleading is legally defective. It asks the court to assume every factual allegation in the complaint is true and then decide whether those facts add up to a valid claim. If the defect appears on the face of the pleading, or from something the court can judicially notice, it gets raised by demurrer. If the defect isn’t visible on the face of the complaint, the defendant raises it later as a defense in the answer.¹

Section 430.10 labels the eight grounds as subdivisions (a) through (h). Some are “general” demurrers going to the core legal validity of the claim; others are “special” demurrers targeting procedural or technical defects. A demurrer has to specify which subdivisions it relies on, and courts have no obligation to consider arguments tied to the wrong one.

The Eight Grounds Under Section 430.10

(a) Lack of Subject Matter Jurisdiction

Subdivision (a) applies when the court lacks authority over the type of case being brought. If a dispute belongs exclusively in federal court or in a specialized tribunal, the defendant can demur on this ground. A court without subject matter jurisdiction cannot act on a case no matter how well-pleaded it is.²

(b) Lack of Legal Capacity to Sue

Subdivision (b) applies when the person or entity that filed the complaint has no legal right to bring the suit. A common example is a corporation whose charter has been suspended or revoked by the state. Minors and people declared legally incompetent also lack capacity to sue on their own, though they can act through a guardian or representative. The issue isn’t the strength of the plaintiff’s case; it’s whether they can bring any case at all.²

(c) Another Action Pending

Subdivision (c) applies when the same plaintiff has already filed another lawsuit against the same defendant over the same dispute. The remedy is abatement, which puts the second case on hold or dismisses it rather than letting two identical actions proceed at the same time. The parties, the claims, and the underlying facts all have to substantially overlap.²

(d) Defect or Misjoinder of Parties

Subdivision (d) targets problems with who is included in the lawsuit. Misjoinder means the wrong parties have been joined together, or a necessary party has been left out. If someone who has to be part of the case for a fair resolution hasn’t been named, or unrelated parties and claims have been improperly lumped together, this ground gives the defendant a way to object.²

(e) Failure to State a Cause of Action

Subdivision (e) is the workhorse of demurrer practice. It says that even accepting every factual allegation as true, the complaint doesn’t plead enough facts to establish any recognized legal claim. Every cause of action has specific elements that must be alleged. A negligence claim, for example, requires facts showing the defendant owed a duty, breached it, and that the breach caused actual harm. If the complaint skips or fails to support any required element, the claim fails under subdivision (e). Courts accept properly pleaded facts but ignore bare legal conclusions; saying “the defendant was negligent” without supporting facts is a conclusion, not an allegation. A successful demurrer here can end a case entirely if the plaintiff can’t fix the problem, though courts usually give at least one chance to amend.²

(f) Uncertainty

Subdivision (f) targets complaints so unclear the defendant cannot figure out what claim is actually being made. The statute defines “uncertain” to include pleadings that are ambiguous or unintelligible. This is a special demurrer, and it’s harder to win than a subdivision (e) challenge. Courts tend to read complaints generously, and if the overall meaning is discernible despite sloppy drafting, a demurrer for uncertainty will often be overruled. It carries the most weight when a complaint is so vague the defendant cannot prepare a meaningful response.²

(g) Contract Type Not Specified

Subdivision (g) applies only in contract disputes. It allows a demurrer when the complaint doesn’t indicate whether the contract at issue is written, oral, or implied by conduct. That distinction matters because different rules apply to each type, including statutes of limitations and evidentiary requirements. Fixing this defect is straightforward: the plaintiff amends to specify the contract type.²

(h) Missing Professional Negligence Certificate

Subdivision (h) applies when a plaintiff sues an architect, professional engineer, or land surveyor for professional negligence but fails to file the certificate required by CCP section 411.35. That section requires the plaintiff’s attorney to certify that they consulted with a licensed professional in the same discipline and concluded there is reasonable cause for filing the action.³ Without that certificate, the defendant can demur under subdivision (h).²

Filing Deadline and Meet-and-Confer

A demurrer has to be filed within 30 days after the defendant is served with the complaint or cross-complaint.⁴ Before filing, the demurring party must meet and confer with the opposing party in person, by phone, or by video, to try to resolve the objections without court involvement. This conversation has to happen at least five days before the responsive pleading is due. If the parties can’t connect in time, the demurring party gets an automatic 30-day extension by filing a declaration explaining the situation.⁵

The meet-and-confer is more than a formality. The demurring party has to identify every cause of action it plans to challenge and explain the legal basis for each objection. The opposing party has to either defend its pleading or explain how it could fix the problems. Even so, a court won’t overrule or sustain a demurrer based solely on whether the meet-and-confer was adequate.⁵

The demurrer itself must be accompanied by a memorandum of points and authorities. A court can treat the absence of a memorandum as a concession that the demurrer lacks merit and deny it on that basis alone.⁶

What Happens After the Ruling

The court will either sustain the demurrer or overrule it. If it’s overruled, the defendant typically must file an answer within a set time and the case moves forward. If it’s sustained, the outcome depends on whether the court grants leave to amend.

Most of the time, courts sustain demurrers with leave to amend, giving the plaintiff a chance to fix the complaint. That’s especially likely the first time around, because courts favor resolving cases on the merits rather than on technicalities. The plaintiff then files an amended complaint addressing the deficiencies the court identified. If the defendant thinks the amended version still falls short, they can demur again, and the cycle repeats.

There are limits. A complaint generally cannot be amended more than three times in response to demurrers, unless the plaintiff can show the court that additional facts exist that could cure the problem.⁵ Separately, a plaintiff has a one-time right to amend without court permission before the defendant files an answer or demurrer, which is useful when the plaintiff spots a fixable defect early.

When the court sustains a demurrer without leave to amend, the defect is incurable and no re-drafting will produce a valid claim. The cause of action is dismissed. If the demurrer knocked out every cause of action in the complaint, the entire case is over.

Personal Jurisdiction Is Not a 430.10 Ground

Section 430.10 does not cover personal jurisdiction, meaning the court’s authority over the specific defendant rather than over the subject matter. A defendant who believes the court lacks personal jurisdiction has to file a motion to quash service of summons under CCP section 418.10, not a demurrer. Getting the order wrong has consequences: a defendant who files a demurrer without first raising personal jurisdiction through a motion to quash waives that defense entirely.⁷

Sanctions for Frivolous Demurrers

Filing a demurrer that has no legal basis can expose the filing party to sanctions under CCP section 128.7. That statute requires every pleading and motion to be supported by existing law or a good-faith argument for changing it, and it bars filings made primarily to harass or delay. An attorney who signs a demurrer is certifying that it has legal and factual merit.⁸

The opposing party can seek sanctions by filing a motion that describes the specific violation. The statute builds in a 21-day safe harbor: the motion must be served on the other side first, and if the offending filing is withdrawn or corrected within 21 days, the sanctions motion can never be filed with the court. Sanctions are limited to what’s necessary to discourage future misuse and can include attorney’s fees and costs the other side incurred because of the frivolous filing.⁸

1
California Legislative Information. California Code of Civil Procedure CCP 430.30
2
California Legislative Information. California Code of Civil Procedure CCP 430.10
3
California Legislative Information. California Code of Civil Procedure CCP 411.35
4
California Legislative Information. California Code of Civil Procedure CCP 430.40
5
California Legislative Information. California Code of Civil Procedure CCP 430.41
6
Judicial Branch of California. California Rules of Court Rule 3.1113
7
California Legislative Information. California Code of Civil Procedure CCP 418.10
8
California Legislative Information. California Code of Civil Procedure CCP 128.7