A lawyer licensed in a single state can practice federal law in any state for some kinds of work but not others, and the question of whether a lawyer can practice federal law in any state turns on what they’re doing. Advising a client on a federal tax question from across the country is generally fine. Walking into a federal courtroom in another district requires separate admission to that court’s bar. Practice before federal agencies like the IRS or immigration courts follows a different set of rules entirely. Federal law is national; the credentials to practice it are not automatically portable.
Federal Agencies: Usually Portable Nationwide
Practice before federal administrative agencies is where the answer comes closest to a clean yes. The Supreme Court held in 1963 that when federal law authorizes someone to practice before a federal agency, states cannot block that authorization through their own licensing requirements.1Justia Law. Sperry v Florida, 373 US 379 (1963) Several major agencies apply that principle directly.
The IRS governs practitioner conduct through Circular 230. Attorneys admitted to any state bar are automatically eligible to represent taxpayers before the IRS, alongside certified public accountants and enrolled agents. The IRS Office of Professional Responsibility can independently sanction practitioners through censure, suspension, disbarment from IRS practice, and monetary penalties.2Internal Revenue Service. Office of Professional Responsibility and Circular 230 A lawyer licensed in one state can represent a taxpayer located in another state before the IRS without any additional admission.
The Executive Office for Immigration Review allows any attorney who is a member in good standing of the bar of the highest court of any state, the District of Columbia, or a U.S. territory to represent individuals in immigration proceedings.3Department of Justice. Can Someone Represent You Before EOIR? No separate agency-specific admission is needed. A lawyer in one state can represent a client in an immigration court hearing anywhere in the country.
The SEC allows any attorney admitted to practice before the Supreme Court of the United States or the highest court of any state to appear in proceedings before the Commission.4eCFR. 17 CFR 201.102 – Appearance and Practice Before the Commission
The Patent Office Exception
The USPTO breaks the pattern. Practicing before the patent office requires passing the patent bar examination, and applicants must demonstrate specific scientific or technical training in addition to their legal credentials.5United States Patent and Trademark Office. General Requirements Bulletin for Admission to the Examination for Registration to Practice in Patent Cases An attorney with a law degree but no technical background cannot sit for the patent bar at all. Once registered, though, a patent practitioner can represent clients before the USPTO from anywhere in the country, and states cannot restrict that federally authorized practice.
Federal Courts: Each One Admits Its Own
Federal law says parties in federal court may be represented by counsel “as, by the rules of such courts, respectively, are permitted to manage and conduct causes therein.”6Office of the Law Revision Counsel. 28 USC 1654 – Appearances Personally or by Counsel In practice, each federal court sets its own admission standards. Getting admitted to a federal district court in one part of the country does not give you the right to appear in a federal district court elsewhere. You apply to each court individually.
For U.S. District Courts, the process is straightforward: submit an application, prove you hold an active state bar license, pay the admission fee, and take an oath. The Judicial Conference of the United States sets a national admission fee of $199, though individual courts may add a local surcharge.7United States Courts. District Court Miscellaneous Fee Schedule
U.S. Courts of Appeals follow a similar pattern. Under the Federal Rules of Appellate Procedure, an attorney is eligible if they are admitted to practice before the highest court of a state, another federal court of appeals, or a U.S. district court.8Legal Information Institute. Federal Rules of Appellate Procedure Rule 46 The U.S. Supreme Court is more selective. Applicants must have been admitted to practice before the highest court of a state for at least three years, must have no disciplinary actions during that period, and need two sponsors who are current members of the Supreme Court bar and know the applicant personally.9Legal Information Institute. Supreme Court Rules – Rule 5 Admission to the Bar
Specialized federal courts maintain their own bars. The U.S. Tax Court admits any attorney who holds a license from the highest court of a state, is in good standing, and demonstrates the qualifications to provide competent representation in tax disputes.10United States Tax Court. Rule 200 – Admission to Practice and Periodic Registration Fee Bankruptcy courts operate as units of the district courts and generally follow the same admission rules as their parent court. A lawyer with cases in multiple federal districts needs to maintain bar membership in each one, and attorneys who handle a high volume of federal litigation across the country can end up admitted to a dozen or more federal court bars simultaneously.
Pro Hac Vice for a Single Case
When a lawyer needs to handle a single case in a federal court where they’re not a member of the bar, pro hac vice admission is the workaround. The phrase means “for this occasion only.” The process involves filing a motion with the court, submitting an affidavit disclosing any disciplinary history, and providing certificates of good standing from every state bar where the attorney is licensed.11United States District Court, Southern District of New York. Instructions for Admission Pro Hac Vice Most federal courts also require the out-of-state attorney to associate with local counsel who is already admitted to that court’s bar. Local counsel serves as a point of contact for the court and helps ensure compliance with local rules.12Legal Information Institute. Pro Hac Vice
Pro hac vice admission is granted per case, and the attorney must pay a fee each time. Some courts signal a strong preference that attorneys who appear regularly should seek full admission rather than relying on repeated pro hac vice motions.
Advising Clients on Federal Law Across State Lines
A significant amount of federal practice never involves a courtroom or agency hearing. Lawyers advise clients on federal regulatory compliance, draft documents governed by federal law, structure transactions to satisfy federal tax requirements, and counsel on immigration options. This is where state licensing boundaries become blurred.
A lawyer licensed in one state can generally advise clients on federal law matters involving activity in another state, as long as the work stays advisory and doesn’t amount to practicing law in the other state. ABA Model Rule 5.5 recognizes this by carving out exceptions for temporary practice that is reasonably related to a pending or potential proceeding, and for services a lawyer is authorized to provide by federal law.13American Bar Association. Rule 5.5 – Unauthorized Practice of Law; Multijurisdictional Practice of Law
Every state defines the “practice of law” slightly differently. A federal tax attorney in one state advising a client in another state about IRS compliance is on solid ground. The same attorney drafting a contract that touches both federal and state law for that client might be edging into unauthorized practice in the client’s state. The more the work resembles local legal practice rather than purely federal advice, the higher the risk.
In-House Counsel Across States
Corporate attorneys working as in-house counsel face this issue constantly. A company headquartered in one state with operations in twenty others needs advice on federal regulations affecting all those locations. ABA Model Rule 5.5(d) allows a lawyer admitted in one jurisdiction to provide legal services to their employer or its affiliates in another jurisdiction through a systematic and continuous presence, provided the lawyer is not disbarred or suspended.13American Bar Association. Rule 5.5 – Unauthorized Practice of Law; Multijurisdictional Practice of Law
States implement this rule differently. Around 36 states require in-house counsel licensed elsewhere to register with the local bar, a process that can involve fees, continuing legal education obligations, and character and fitness reviews. Roughly 13 jurisdictions allow in-house counsel to work without any registration, as long as they hold an active license somewhere. A handful of states have their own approaches that don’t follow the model rule at all.
What Happens If You Get It Wrong
The consequences of guessing wrong are serious. A lawyer who establishes an office or maintains a systematic presence in a state where they’re not licensed, without qualifying for an exception, violates that state’s unauthorized practice rules. Penalties range from professional discipline, including suspension or disbarment in the lawyer’s home state, to criminal prosecution in some jurisdictions. Work product can be challenged too. A court might disqualify the attorney mid-case or refuse to enforce agreements drafted by someone engaged in unauthorized practice.
The fact that the underlying law is federal doesn’t automatically protect you. Federal preemption shields attorneys practicing before federal agencies under specific federal authorization. It does not create a blanket right to practice federal law in any state for any purpose. An attorney who is not admitted to a state bar and doesn’t qualify under any recognized exception takes a real risk by providing legal services there, even if those services involve exclusively federal questions.
Lawyers who regularly handle federal matters across state lines should audit their compliance. Maintaining admission to key federal courts, registering as in-house counsel where required, and understanding the limits of pro hac vice and temporary practice exceptions is the difference between a legitimate nationwide practice and a disciplinary complaint.