Should a California Business Lawsuit Be in State Court or Federal Court, and Can It Be Moved?

Last updated: November 2026. Reviewed by Pavel Kolmogorov, California business litigation attorney (State Bar No. 321018).

A California company sued in California state court usually cannot remove the case to federal court just because the plaintiff is from another state. The forum-defendant rule, 28 U.S.C. § 1441(b)(2), bars removal on diversity alone when a served defendant is a forum-state citizen. Removal remains available if the complaint raises a federal question, such as a trademark or copyright claim. The notice is due 30 days after the defendant is formally served. Kolmogorov Law, P.C. litigates in state and federal courts in Los Angeles and Orange County.

Call (909) 235-6116 or contact us online to discuss where your case should be filed, or whether one filed against you can be moved.

Which business cases can be in federal court

Federal courts hear only what Congress allows. There are two main doors.

The first is a federal question: a claim arising under the Constitution or federal law. (28 U.S.C. § 1331.) In business cases that usually means a trademark, copyright, or federal trade secret claim. Copyright is a special case, because no state court has jurisdiction over a claim arising under the federal copyright statutes. (28 U.S.C. § 1338(a).) Our intellectual property page covers those claims.

The second door is diversity. The parties must be citizens of different states, or of a state and a foreign country, and the amount in controversy must exceed $75,000, not counting interest and costs. (28 U.S.C. § 1332(a).) A contract dispute between two California companies fails that test, however large it is.

How citizenship works for corporations and LLCs

A corporation is a citizen of every state where it is incorporated and of the state where it has its principal place of business. (28 U.S.C. § 1332(c)(1).)

An LLC is different, and this trips up both sides. In the Ninth Circuit, an LLC is a citizen of every state of which its owners or members are citizens. (Johnson v. Columbia Properties Anchorage, LP (9th Cir. 2006) 437 F.3d 894, 899.) A Delaware LLC run from Texas, with one member who is a U.S. citizen domiciled in Irvine, is a California citizen. Domicile means a permanent home, which is more than a current address. If the members are themselves LLCs or partnerships, the analysis continues through each layer.

I ask for the full ownership chart before deciding where a case can go. One overlooked member can undo months of work.

If you are the defendant: removal and its deadline

A defendant sued in state court on a case the federal court could have heard may remove it to the federal district that covers that county. (28 U.S.C. § 1441(a).) For Los Angeles and Orange County, that is the Central District of California.

The deadline comes quickly. The notice of removal is due within 30 days after the defendant is formally served with the complaint. (28 U.S.C. § 1446(b)(1).) The Supreme Court has held that a courtesy copy sent before service does not start the clock. All defendants who have been properly joined and served must join in or consent. (28 U.S.C. § 1446(b)(2)(A).) If the case becomes removable later, a new 30 days runs from the paper that first shows it. On diversity grounds, that later removal is generally barred more than one year after the case began. (28 U.S.C. § 1446(b)(3), (c)(1).)

Then comes the rule that surprises California defendants. A case removable only on diversity may not be removed if any properly joined and served defendant is a citizen of the state where it was filed. (28 U.S.C. § 1441(b)(2).) A California company sued at home by a New York plaintiff usually stays in state court, unless the complaint includes a federal claim. An out-of-state defendant sued here without a California co-defendant is not caught by the rule.

If you are the plaintiff: remand and how to plan for it

A plaintiff who believes a removal was improper moves to remand. A motion based on a procedural defect, such as a late notice or a missing consent, must be made within 30 days after the notice of removal is filed. Lack of subject matter jurisdiction can be raised at any time before final judgment. (28 U.S.C. § 1447(c).) In the Ninth Circuit a forum-defendant objection falls on the 30-day side of that line, and a plaintiff who misses it waives the objection. (Lively v. Wild Oats Markets, Inc. (9th Cir. 2006) 456 F.3d 933, 942.)

The motion has teeth. The court may order the removing party to pay the costs and attorney fees the removal caused, and an order sending the case back generally cannot be appealed. (28 U.S.C. § 1447(c), (d).)

The planning happens earlier, in the complaint. A plaintiff who pleads only state-law claims and properly joins and serves a California defendant will usually stay in state court. Our page on how to sue a company covers the other filing decisions.

How the two courts differ in practice

The jury is the biggest difference. A federal civil jury has 6 to 12 members and must be unanimous unless the parties agree otherwise. (Fed. Rules Civ. Proc., rule 48.) A California civil jury has 12 members unless the parties agree to fewer, and three-fourths of them may return a verdict. (Cal. Const., art. I, § 16.)

Discovery is tighter in federal court. Each side is presumptively limited to 10 depositions, each to one day of seven hours, and a party may serve only 25 written interrogatories on any other party. (Fed. Rules Civ. Proc., rules 30, 33.)

Pace differs too. In my experience, Central District judges set a firm schedule early and hold the parties to it. Our step-by-step guide to a California lawsuit describes the state court sequence.

Deciding where the case belongs

Start with the contract. A forum selection clause may settle the question before strategy enters.

After that, the choice turns on the case. A defendant with a strong legal defense and a weak jury story often prefers federal court. A plaintiff who needs broad discovery from a reluctant defendant may prefer state court.

The Central District sits in both Los Angeles and Santa Ana. See our Los Angeles business litigation page and our civil litigation practice page.

What to bring to the first meeting

The complaint and summons, with the date each defendant was served.
The contract, including any forum selection or arbitration clause.
Formation documents and a list of owners or members for each entity on your side.
What you know about the other side's ownership and headquarters.
A realistic estimate of the amount in dispute.

Frequently asked questions

We were sued in Los Angeles Superior Court by an out-of-state company. Can we move the case to federal court?

Only in some cases. If your company is a California citizen and has been properly served, 28 U.S.C. § 1441(b)(2) bars removal of a California state case based on diversity alone, even when the plaintiff is from another state. You can remove if the complaint includes a federal claim, such as trademark or copyright infringement. Either way, the notice of removal is due 30 days after you are formally served.

My LLC has one member in Nevada and the rest in California. Where is the LLC a citizen for a federal lawsuit?

Both states, assuming each member is domiciled where you describe. In the Ninth Circuit, which includes California, an LLC is a citizen of every state of which its members are citizens, wherever it was formed or has its office. That rule comes from Johnson v. Columbia Properties Anchorage, LP. If the opposing party is also a citizen of California or Nevada, diversity jurisdiction will generally be unavailable.

How long does a defendant have to remove a case to federal court?

Thirty days. Under 28 U.S.C. § 1446(b), the notice of removal must be filed within 30 days after the defendant is formally served with the initial pleading. If the case only later becomes removable, a new 30 days runs from the amended pleading or other paper that shows it. A later removal based on diversity is generally barred more than one year after the case was commenced.

What is the difference between state and federal court for a business lawsuit?

In California state court, a civil jury ordinarily has 12 members and three-fourths can return a verdict. A federal civil jury must be unanimous unless the parties agree otherwise. Federal rules also presume limits of 10 depositions per side and 25 interrogatories per party. Federal courts mainly hear cases with a federal question or diversity of citizenship; state courts hear nearly everything else.

Can a case be sent back to state court after removal?

Yes. Under 28 U.S.C. § 1447(c), the plaintiff may move to remand within 30 days for a procedural defect in the removal, and the federal court must remand at any time before final judgment if it lacks subject matter jurisdiction. The court may award the costs and attorney fees caused by an improper removal, and remand orders are generally not appealable.

Talk to a California business litigation attorney

If you are choosing a court, or have been served and are inside the 30-day removal window, call (909) 235-6116 or contact us online. Kolmogorov Law, P.C. is located at 327 Magnet, Irvine, CA 92618, and represents businesses in Orange County, Los Angeles, and throughout California.

This page provides general information about California and federal law and is not legal advice. Outcomes depend on the parties, the claims, and the court.