All rules

Rule 40 — Defenses and Objections Made by Pleading or Motion

Every defense, in law or fact, to a claim for relief in any pleading shall be asserted in the responsive pleading thereto if one is required, except that the following defenses may, at the option of the pleader, be made by motion: (a) Lack of jurisdiction, and (b) failure to state a claim upon which relief can be granted. If a pleading sets forth a claim for relief to which the adverse party is not required to file a responsive pleading, then such party may assert at the trial any defense in law or fact to that claim for relief. If, on a motion asserting failure to state a claim on which relief can be granted, matters outside the pleading are to be presented, then the motion shall be treated as one for summary judgment and disposed of as provided in Rule 121, and the parties shall be given an opportunity to present all material made pertinent to a motion under Rule 121.

(As effective October 3, 2008, 130 T.C. 411. For prior history, see 60 T.C. 1088 (1973); 71 T.C. 1188–89 (1979); 93 T.C. 871 (1989).)

As amended through August 2024.

This is a Docket.tax digital transcription provided for reference only and may lag the very latest amendments — always confirm against the official Rules linked above. Docket.tax is an independent tool, not affiliated with, endorsed by, or operated by the U.S. Tax Court.
Docket.tax Pro

Research the U.S. Tax Court — not just the Rules

The Rules are free. A Docket.tax subscription turns the entire U.S. Tax Court into a research platform — full-text search across every rule, opinion, and order; insight into how judges and counsel actually litigate; and AI that tracks your cases for you.

  • Full-text search — every rule, opinion, order, and brief — by any phrase.
  • Counsel & Judge Search — records, caseloads, and how each judge tends to rule.
  • Docket Explorer — search the entire Tax Court docket by almost any attribute.
  • AI case timelines & calendaring — deadlines and milestones, generated automatically.
  • Opinion alerts & database — know the moment the Court acts on a case you follow.
  • Track up to 1,000 dockets — monitor your whole practice in one place.
Start your 14-day free trialSee plans & pricingBasic & Pro include a 14-day free trial · no card required on Basic.