AG v. Federation of Law Societies – Supreme Court of Canada reasoning indicates that lawyers’ accounts likely are privileged

In the course of striking down the search-and-seizure provision in the federal anti-money laundering legislation, Cromwell J confirmed the absolute statement in Lavallee that "all information protected by the solicitor-client privilege is out of reach for the state," and also indicated that it was contrary to s. 8 of the Charter to place a blanket obligation on lawyers to provide names and addresses of their clients to the federal authority, in order to be able to claim solicitor–client privilege (as "the name of the client may itself be (although is not always) subject to solicitor-client privilege ... [and] the same ... may be said about the ... address for the client.")

This confirms that lawyers’ statements of account, or at least the portions thereof disclosing the services rendered, and the client name and address, probably are privileged.

Neal Armstrong.  Summaries of Attorney General of Canada v. Federation of Law Societies of Canada, 2015 SCC 7 under ITA, s. 232(1) – privilege, and Charter – s. 7.