Legal Privilege Guide
Attorney-Client Privilege: What It Covers and When It Does Not
Attorney-client privilege protects confidential communications between you and your lawyer from being disclosed — even in court. But it has sharp limits: it does not cover every conversation with a lawyer, it can be waived by sharing with the wrong people, and it does not apply at all to communications with non-lawyers. Knowing the boundaries matters whether you are hiring counsel, sharing information with contractors, or signing an NDA.
Last updated: July 11, 2026 · Reading time: 7 min read
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How Attorney-Client Privilege Works
Attorney-client privilege is one of the oldest recognized privileges in U.S. law. It attaches to confidential communications between an attorney and a client made for the purpose of obtaining or providing legal advice. The privilege belongs to the client — not the lawyer — and only the client can waive it. The purpose is to encourage full disclosure to legal counsel so the lawyer can give informed advice.
Privilege vs. confidentiality: Privilege is different from the general duty of confidentiality. An attorney is ethically obligated to keep client information confidential even when privilege does not apply (such as business advice that does not seek legal counsel). Privilege goes further: it lets the client refuse to disclose the communication in court.
When Privilege Applies — and When It Does Not
- Privileged — confidential communication with a lawyer for the purpose of obtaining legal advice, even if no lawsuit is pending
- Privileged — communications with the lawyer's agents (paralegals, investigators, expert witnesses hired by counsel)
- Not privileged — communications in the presence of a third party who is not part of the legal representation
- Not privileged — communications about a planned or ongoing crime or fraud (the "crime-fraud exception")
- Not privileged — business advice that does not involve legal questions, even when given by a lawyer
- Not privileged — communications with in-house counsel when the primary purpose is business, not legal
Common Ways Privilege Is Waived by Accident
Privilege is fragile. The most common waivers happen not in court but in everyday business operations. Forwarding an email with the lawyer to a contractor, copying a colleague on a privileged memo, or discussing strategy in a meeting with outside vendors can all destroy the privilege. Once waived, it generally cannot be reclaimed.
The "need to know" rule: Only the client and the people the client needs to involve in the legal representation can be included on privileged communications. Contractors, vendors, and even in-house business teams do not automatically count. When in doubt, ask the lawyer before sharing.
Frequently Asked Questions
Does attorney-client privilege apply to communications with in-house counsel?
Yes — but with limitations. In-house lawyers are fully licensed attorneys and the privilege technically applies. Courts often scrutinize in-house communications more closely, however, and privilege may not apply when the lawyer is acting in a business rather than legal capacity. The "primary purpose" test determines which communications are protected.
Can I share privileged information with a contractor under an NDA?
Carefully. The NDA protects the contractor from disclosing the information to others, but it does not preserve attorney-client privilege. Sharing a privileged memo with a contractor generally waives privilege as to that document and anything the contractor shares with others. When working with outside counsel, ask the lawyer before circulating privileged communications.
What happens if I accidentally waive privilege?
Once waived, privilege over the specific communication is generally lost. In some cases, courts may apply a limited waiver (only waiving privilege as to the specific disclosure, not all related communications), but this is rare and uncertain. The safer course is to mark privileged documents clearly, restrict distribution, and train employees on what counts.
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