Legal Professional Privilege in Tax Practice

Legal professional privilege protects confidential communications made for the dominant purpose of legal advice or actual or reasonably anticipated litigation. When an Australian Taxation Office (ATO) notice arrives, separate supportable privilege claims from the ordinary accounting records you must supply.

What Legal Professional Privilege Protects

Legal professional privilege belongs to the client and protects qualifying communications against compulsory disclosure. Your practice can hold a privileged document without owning the privilege or having authority to waive it.

Advice privilege covers confidential communications made for the dominant purpose of obtaining or giving legal advice. The lawyer must give the advice in their professional legal capacity. Commercial advice does not acquire protection simply because its author has a legal qualification.

Litigation privilege concerns confidential communications prepared for the dominant purpose of actual or reasonably anticipated legal proceedings. An ATO enquiry does not automatically establish that litigation is reasonably anticipated. Ask the client’s lawyer to assess the circumstances.

The High Court’s dominant-purpose ruling means legal advice need not be the document’s only purpose. It must be the dominant purpose, assessed from the circumstances when the communication was made.

Ordinary accountant confidentiality is a separate obligation. It does not itself defeat a lawful demand for records.

The ATO’s accountants’ concession is an administrative approach to certain accounting advice documents, with access possible in exceptional circumstances. It creates no legal privilege binding a court. The ATO seeks unrestricted access to source documents, including ordinary tax-return working papers. Check its information-gathering guidance before making a separate concession claim.

Separate Advice From Accounting Workpapers

Assess why each communication was created and how it was kept confidential. A label such as “subject to legal professional privilege” records an intention but does not establish protection. Copying a lawyer into an email has the same limitation.

Consider these fictional documents from a client company’s tax file.

Document	Purpose and likely treatment	Practice action
A confidential lawyer’s opinion about a disputed deduction	Legal advice to the company, with a supportable claim if the legal requirements are met	Send it for the lawyer’s privilege assessment before production
Your return calculation and attached invoices	Ordinary tax compliance and transaction evidence	Include responsive, non-privileged records in the production set
A meeting note mixing bookkeeping actions with a summary of legal advice	Different passages need assessment, including whether they reveal protected advice	Have the lawyer identify any protected passage and assess a redacted production copy
A confidential factual report commissioned by the lawyer to advise the company	Accountant assistance can attract protection where the dominant purpose is obtaining legal advice	Retain the instructions and evidence of purpose, then seek the lawyer’s assessment

The accountant’s role matters in the last example. Record the legal question the lawyer needs help answering and the work the accountant was asked to perform. A report independently prepared for accounting advice does not become privileged merely because it later goes to a lawyer.

The Queensland information regulator’s explanation of third-party communications describes how the dominant-purpose test can extend to expert assistance. That principle does not protect every communication between an accountant and a client. Keep the underlying invoices and original accounting records separately identifiable.

Respond to an ATO Information Notice

Preserve the material and arrange a document-specific legal assessment while continuing the response for records outside the claim.

1. Preserve original files and their metadata. Restrict access to potentially privileged material and work from controlled copies. Keep emails with their attachments and retain the complete chain.
2. Map responsive records to the notice. Flag potentially protected communications for review, including separate emails within a chain and each attachment. Record the notice deadline and who owns the response.
3. Give the lawyer the notice, legal engagement details and document list. Ask for decisions on full claims, partial claims and records to produce. Raise timing problems with the ATO before the deadline.
4. Prepare the approved claim schedule and the non-privileged production set. Explain any partial withholding and the approach used. Retain proof of what was sent and when.

The ATO’s legal professional privilege protocol recommends assessing each communication, explaining the claim and advising the ATO how you approached it. Following the protocol is voluntary. The legal test determines protection, and the ATO can still challenge a claim.

Before sending, reconcile the notice items against the production set and claim schedule. Every responsive item needs an accounted-for outcome. A blanket refusal covering the whole file leaves ordinary records unanswered. For the wider review response, use the ATO audit guide.

Avoid Waiving the Client’s Privilege

Waiver of legal professional privilege can result from express consent or conduct inconsistent with keeping the communication confidential. The client need not intend that legal consequence. The High Court’s waiver decision makes the circumstances and purpose of disclosure central.

Sharing advice, quoting its conclusion or relying on it to justify a tax position can put privilege at risk. Giving only a favourable extract can expose more than the chosen words. Obtain the lawyer’s advice before using the opinion in correspondence with the ATO.

In a fictional adviser handover, the outgoing accountant puts the lawyer’s opinion into a general client transfer folder. The client’s authority to transfer accounting records does not answer whether that disclosure preserves privilege. Separate the opinion and ask the lawyer to settle the purpose, recipients and confidentiality arrangements before release. Limited confidential disclosure does not automatically waive privilege, but a confidentiality label alone cannot guarantee protection.

Record client consent for ordinary disclosures separately from the lawyer’s privilege assessment.

AI and legal professional privilege also require assessment before disclosure. Before uploading advice, check whether the provider or its subcontractors can access it, reuse it for training or retain it after deletion. Review contractual confidentiality, account settings and the intended use with the lawyer. A private or paid account does not by itself preserve privilege.

The Queensland Law Society’s AI guidance on confidentiality calls for assessment of data access and use under the provider’s terms. If those terms leave confidentiality unresolved, keep the advice out of that service while the assessment remains open.

Choose the Relevant Legal Framework

Common-law privilege is the starting point for a claim during an ATO investigation. A court proceeding requires a separate check of the law and procedure applying in that forum.

The Commonwealth Evidence Act 1995 calls its protection client legal privilege. Section 118 addresses legal advice, section 119 addresses litigation and section 122 deals with consent and inconsistent conduct. These statutory evidence rules do not automatically govern an ATO notice simply because the investigation might later reach court.

For a mixed document, the lawyer must assess whether the accounting passages can be disclosed without revealing the substance of protected advice. For overseas advisers or cross-border communications, identify the jurisdiction and legal relationship before assuming Australian protection applies throughout.

Give the lawyer the notice and any court orders so they can choose the relevant framework. Continue preparing the non-privileged response while disputed material is assessed. Obtain an agreed extension where needed instead of assuming the claim suspends the deadline.

Keep a Defensible Claim Record

Keep enough evidence to explain each claim without disclosing the legal advice itself. The schedule and the practice’s restricted decision file have different jobs.

For the claim schedule, record the document ID, communication date, format and page count. Identify the privilege holder and each author, sender and recipient, including their roles. State the dominant purpose, the legal issue at a safe level and whether the claim covers all or part. Identify attachments separately and explain forwarding or copies where relevant.

Keep the supporting engagement instructions and the lawyer’s reasoning in the restricted decision file. Record who approved the claim, what was redacted and which version was produced. Preserve evidence of confidentiality and any earlier disclosures.

A schedule must not reproduce protected advice to prove that advice exists. Have the lawyer assess whether a subject line or description reveals its substance. Explain an omitted particular or redaction without exposing the communication it protects.

If the ATO challenges a claim, identify the disputed document and the reason for the challenge. Give the lawyer the original, creation instructions, recipient history and the exact schedule already supplied. Ask whether further particulars can resolve the issue or whether a dispute process or court determination is needed.

Keep the challenged material secure while the lawyer settles that response. Record the outcome against each document and continue supplying the other records required by the notice.