Legal Client Engagement Letter

An engagement letter formally defines the scope, fees, and terms of a lawyer-client (or firm-client) representation — establishing a clear, mutual understanding of the relationship before work begins, typically following a Legal Conflict of Interest Check confirming the representation can be ethically accepted.

Common contents

• Scope of representation — precisely what matter(s) the engagement covers, and (just as importantly) what it doesn't cover.
• Fee arrangement — hourly rates, flat fee, contingency, or another structure, along with billing frequency and expectations.
• Client responsibilities — what the client is expected to provide (information, documents, timely decisions) for the representation to proceed effectively.
• Termination terms — how either party can end the representation, and what happens to unbilled work or unresolved matters at that point.
• Confidentiality and conflicts — confirmation of the attorney-client privilege's scope and any relevant conflict waivers.

Why scope definition matters so much

A precisely defined scope protects both parties: the client knows exactly what they're paying for and what falls outside the engagement (and would need a separate arrangement), and the lawyer/firm has a clear boundary for what work is actually covered — vague scope is a common source of billing disputes and client dissatisfaction.

Common pitfalls

• Vague or overly broad scope of representation — this creates ambiguity about what work is covered, leading to disputes when additional issues arise that the client assumed were included.
• Unclear fee arrangements — a client surprised by billing they didn't expect (because the fee structure wasn't clearly explained upfront) is a common source of dissatisfaction and disputes.
• Skipping the engagement letter for a "quick" or informal matter — even brief engagements benefit from a clear written understanding; informal engagements are a common source of later disputes about what was actually agreed.
• Not updating the engagement letter as scope changes — a matter that expands significantly beyond its original scope should be reflected in an updated agreement, not left to the original (now-outdated) letter.

Learn more

• Legal Conflict of Interest Check for the required check that typically precedes issuing an engagement letter.
• Legal Case Management for tracking the engagement once it's underway.
• Statement of Work for a related, non-legal-specific document defining scope and terms.