Under ABA Model Rule 1.16, mandatory withdrawal applies in four defined situations where a lawyer has no discretion, and permissive withdrawal covers seven situations where the lawyer may leave but is not required to. The line between the two is the heart of the rule: subsection (a) says “shall,” subsection (b) says “may.” Because the Model Rules are templates rather than law themselves, the version in force depends on the state that adopted them, though the two-tier structure is common across jurisdictions.1American Bar Association. Model Rules of Professional Conduct – Rule 1.16 Declining or Terminating Representation
The Four Mandatory Grounds Under Rule 1.16(a)
When any of these four conditions exists, the lawyer must decline the engagement or, if it has already started, withdraw.1American Bar Association. Model Rules of Professional Conduct – Rule 1.16 Declining or Terminating Representation
Continuing Would Violate the Rules or Other Law
The most common trigger is a conflict of interest. Under Rule 1.7, a concurrent conflict exists when representing one client is directly adverse to another, or when there is a significant risk that the lawyer’s duties to one client, a former client, or the lawyer’s own interests will materially limit the representation.2American Bar Association. Model Rules of Professional Conduct – Rule 1.7 Conflict of Interest Current Clients If informed consent cannot cure the conflict, the lawyer must step aside.
The Supreme Court illustrated another version of this ground in Nix v. Whiteside, holding that a criminal defense lawyer’s refusal to help a client present perjured testimony does not violate the Sixth Amendment. The Court said advocacy is “limited to legitimate, lawful conduct compatible with the very nature of a trial as a search for truth.”3Justia. Nix v. Whiteside, 475 US 157 (1986) Where the representation itself would require the lawyer to break the law, withdrawal is the only path.
The Lawyer’s Physical or Mental Condition Materially Impairs Representation
Not every health issue qualifies. The word “materially” does the work. A lawyer recovering from routine surgery who can still meet deadlines is not impaired within the rule’s meaning. The trigger is a condition serious enough that the client is likely to receive inadequate representation if the lawyer continues.1American Bar Association. Model Rules of Professional Conduct – Rule 1.16 Declining or Terminating Representation
The Lawyer Is Discharged
When the client fires the lawyer, withdrawal is mandatory, and the client does not have to give a reason. The client controls who represents them. Even a lawyer who feels unfairly discharged must still protect the client’s interests during the transition.4American Bar Association. Rule 1.16 Declining or Terminating Representation – Comment
The Client Persists in Using the Lawyer’s Services for Crime or Fraud
A 2024 amendment moved this scenario from the permissive column to the mandatory one. A lawyer must withdraw if the client seeks to use, or persists in using, the lawyer’s services to commit or further a crime or fraud, and the lawyer has already counseled the client about the limits under Rules 1.2(d) and 1.4(a)(5).1American Bar Association. Model Rules of Professional Conduct – Rule 1.16 Declining or Terminating Representation Before the amendment, a lawyer could stay after giving the warning. Now, once the warning has been given and the client persists, leaving is not optional.
The Seven Permissive Grounds Under Rule 1.16(b)
Rule 1.16(b) sets out seven situations where the lawyer has discretion. The first is the broadest: withdrawal can be accomplished without a material adverse effect on the client’s interests.1American Bar Association. Model Rules of Professional Conduct – Rule 1.16 Declining or Terminating Representation If nothing bad happens to the client because of the lawyer’s departure, the lawyer generally has freedom to leave for any reason.
The other six cover situations where withdrawal may cause some harm to the client but is still justified:
- The client persists in a course of action involving the lawyer’s services that the lawyer reasonably believes is criminal or fraudulent.
- The client has already used the lawyer’s services to commit a crime or fraud.
- The client insists on action the lawyer finds morally repugnant or with which the lawyer has a fundamental disagreement.
- The client substantially fails to fulfill an obligation to the lawyer, such as paying fees, after reasonable warning.
- Continuing the representation would impose an unreasonable financial burden on the lawyer, or the client has made the engagement unreasonably difficult.
- Other good cause exists, a catchall recognizing that no list can anticipate every legitimate reason to end a professional relationship.
How to Tell the Two Categories Apart in Practice
The categorical difference is discretion. Under 1.16(a), the lawyer has none. Under 1.16(b), the lawyer weighs whether to invoke the ground. Two lines get blurred often enough to be worth spelling out.
First, the crime-or-fraud situation now appears on both sides. Past use of the lawyer’s services for crime or fraud is permissive; ongoing use, after the lawyer has counseled the client about the limits, is mandatory. The trigger is the warning plus the client’s persistence.
Second, “repugnant conduct” and strategic disagreement are not the same thing. A lawyer who simply disagrees with a client’s preferred trial strategy has no ground to withdraw under the repugnance provision. The rule contemplates something deeper: action that conflicts with the lawyer’s fundamental values in a way that makes continued representation untenable.1American Bar Association. Model Rules of Professional Conduct – Rule 1.16 Declining or Terminating Representation
Third, unpaid fees are probably the most common permissive ground in daily practice. The rule requires a clear warning first, and the failure must be substantial, not a single late invoice. The rule sets no dollar threshold. What counts depends on the circumstances of the representation.
Court Permission Can Override Either Category
A lawyer cannot simply send a letter and disappear from a pending case. Rule 1.16(c) requires compliance with any law that demands notice to or permission from a tribunal before ending representation. In most courts this means filing a formal motion to withdraw.1American Bar Association. Model Rules of Professional Conduct – Rule 1.16 Declining or Terminating Representation
A court can order a lawyer to stay on a case even when valid grounds for withdrawal exist. Judges typically deny withdrawal motions when the departure would cause undue delay or prejudice a party’s rights, most often in complex litigation close to trial. If the court says no, the lawyer must continue and can face contempt proceedings for walking away. This applies to mandatory and permissive grounds alike, with the narrow exception that a lawyer facing a true conflict cannot be forced to violate the Rules regardless of the court’s preference.
Duties Owed to the Client on the Way Out
Rule 1.16(d) requires the departing lawyer to take reasonably practical steps to protect the client’s interests. Four duties are named: giving reasonable notice, allowing time for the client to find new counsel, surrendering papers and property the client is entitled to, and refunding any advance payment of fees or expenses not yet earned or incurred.1American Bar Association. Model Rules of Professional Conduct – Rule 1.16 Declining or Terminating Representation
“Reasonable notice” is not defined in days. It depends on the complexity of the matter and any upcoming deadlines. If a statute of limitations is about to expire, reasonable notice may mean handling that deadline before stepping away, or at minimum ensuring the client knows about it in time to act. A lawyer who withdraws the week before a critical filing without flagging the deadline is inviting a malpractice claim.
The refund obligation is straightforward. Unearned fees go back to the client, regardless of who initiated the termination.
File surrender is more contentious, especially when the client owes money. The official comments say a lawyer “may retain papers as security for a fee only to the extent permitted by law,” and the applicable law varies by jurisdiction.4American Bar Association. Rule 1.16 Declining or Terminating Representation – Comment Some jurisdictions allow a retaining lien; others prohibit it or restrict it to the lawyer’s own work product while requiring immediate surrender of what the client provided. The general ethical expectation is that pleadings, correspondence, contracts, and final documents belong to the client. Internal administrative materials like conflicts checks can be withheld.
What Happens When a Lawyer Gets It Wrong
Improper withdrawal exposes a lawyer to discipline, malpractice liability, and fee forfeiture. The ABA’s model disciplinary rules list sanctions ranging from private admonition to disbarment, including suspension for up to three years, probation for up to two years, public reprimand, practice restrictions, and court-ordered restitution to injured clients.5American Bar Association. Model Rules for Lawyer Disciplinary Enforcement – Rule 10
Disciplinary bodies weigh whether the lawyer acted intentionally or negligently, the actual harm caused, and any prior discipline. Aggravating circumstances include a pattern of misconduct, a dishonest motive, and indifference to restitution. Mitigating factors include the absence of prior discipline, personal difficulties, and good-faith efforts to make things right.5American Bar Association. Model Rules for Lawyer Disciplinary Enforcement – Rule 10
Beyond discipline, an improper withdrawal can trigger malpractice liability, most commonly when a client misses a deadline because the lawyer left without adequate notice. Courts have also held that lawyers discharged for cause or whose voluntary withdrawal is deemed improper may forfeit their right to collect fees for work already performed.