Under Rule 12(h)(3), can lack of subject-matter jurisdiction be raised at any time in the proceedings?

Under Rule 12(h)(3), can lack of subject-matter jurisdiction be raised at any time in the proceedings?

• A. Yes, it can be raised at any time and cannot be waived
• B. No, it must be raised before any other defenses
• C. Yes, but only in appellate courts
• D. No, it can only be raised by the plaintiff

Answer: (A)

Rule 12(h)(3) treats lack of subject-matter jurisdiction as a defect that can be raised at any time and cannot be waived. Jurisdiction is the court’s power to hear and decide a case, so if it’s missing, the entire proceeding is void regardless of how much has happened or what defenses were earlier raised. Because of that, a party—or even the court on its own initiative—may bring up this issue at any stage, including on appeal. This is why it cannot be waived, and why timing or prior failures to raise other defenses do not bar bringing it up later. In contrast, other defenses under Rule 12(b) are typically waived if not raised promptly, and the question here is not about those; it’s about the special treatment Rule 12(h)(3) gives to jurisdictional challenges. It isn’t restricted to trial or appellate courts, and it isn’t limited to the plaintiff; any party or the court can raise it.

Rule 12(h)(3) treats lack of subject-matter jurisdiction as a defect that can be raised at any time and cannot be waived. Jurisdiction is the court’s power to hear and decide a case, so if it’s missing, the entire proceeding is void regardless of how much has happened or what defenses were earlier raised. Because of that, a party—or even the court on its own initiative—may bring up this issue at any stage, including on appeal. This is why it cannot be waived, and why timing or prior failures to raise other defenses do not bar bringing it up later.

In contrast, other defenses under Rule 12(b) are typically waived if not raised promptly, and the question here is not about those; it’s about the special treatment Rule 12(h)(3) gives to jurisdictional challenges. It isn’t restricted to trial or appellate courts, and it isn’t limited to the plaintiff; any party or the court can raise it.