A Canadian Retainer Agreement is a legally binding contract between a lawyer (or law firm) and a client that establishes the terms of the solicitor-client relationship under Canadian law. It defines the scope of legal services, the retainer fee, billing rates, payment terms, trust account handling, and the respective rights and obligations of each party. The retainer agreement is the foundational document that formalizes the engagement before legal work begins.

Retainer agreements in Canada are governed by the rules of professional conduct of each provincial and territorial law society. The Federation of Law Societies of Canada has developed the Model Code of Professional Conduct, which has been adopted in substance by most common law provinces. The Model Code requires lawyers to clearly state the basis for their fees and disbursements, provide this information in writing, and ensure the client understands the financial terms before work begins. In Ontario, the Law Society of Ontario's Rules of Professional Conduct (Rule 3.6) require a written retainer agreement for virtually all engagements, including specific disclosure about how fees are calculated, the expected range of fees, and the client's right to have an account assessed.

The retainer fee is deposited into the lawyer's trust account, which is strictly regulated by provincial law society rules. In Ontario, the Law Society Act (R.S.O. 1990, c. L.8) and its regulations govern trust accounts. In British Columbia, the Legal Profession Act (S.B.C. 1998, c. 9) and the Law Society Rules provide the framework. The lawyer may only withdraw funds from the trust account after the services have been rendered and an account has been delivered to the client. Trust account violations are among the most serious disciplinary matters a lawyer can face and frequently result in suspension or disbarment.

A Retainer Agreement should be executed at the beginning of any lawyer-client relationship in Canada where legal services will be provided over time or where the scope and cost of the representation are uncertain. The most common scenarios include retaining a lawyer for civil litigation in provincial superior courts or the Federal Court, criminal defence matters in provincial courts or the Court of Queen's Bench, family law proceedings (divorce, custody, support, property division under the Divorce Act or provincial family law legislation), estate planning and probate, real property transactions and land title registration, corporate formation and governance under the Canada Business Corporations Act or provincial legislation, immigration proceedings before the Immigration and Refugee Board, and ongoing general counsel advisory relationships.

A written retainer agreement is particularly critical in several situations under Canadian law. First, when the engagement involves a substantial retainer deposit, the agreement documents the amount, the trust account handling in accordance with provincial law society rules, and the refund terms. Second, when multiple lawyers, articling students, or paralegals will work on the matter at different billing rates, the agreement should list each professional and their rate. Third, when the client is a business entity, the agreement should clarify who within the organization has authority to provide instructions.

All provincial law societies strongly encourage or require written retainer agreements, and the failure to use one can result in disciplinary consequences. The Law Society of Ontario, for example, treats the absence of a written retainer agreement as a factor in fee dispute complaints and may reduce the lawyer's fees as a result.

A comprehensive Canadian Retainer Agreement must address several critical components. First, the scope of services must precisely describe what legal work is covered and what falls outside the scope. The agreement should reference the specific legal matter, the court or tribunal involved, and the stages of the proceeding covered.

Second, the fee structure must clearly state the retainer amount in Canadian dollars, the hourly rate for each lawyer or legal professional who may work on the matter, the billing increment (typically six-minute intervals), and how the retainer will be applied against earned fees. The agreement should distinguish between an advance retainer (held in trust and drawn down as earned) and a true retainer (a fixed fee for availability), as the trust account treatment differs.

Third, billing and payment terms should specify the frequency of accounts, the payment due date (typically Net 30 in Canada), applicable taxes (GST/HST/PST/QST depending on the province), accepted payment methods, and any interest on overdue amounts, which must comply with section 347 of the Criminal Code of Canada (effective annual rate cannot exceed 35%). The agreement should inform the client of their right to have the account assessed by a court assessment officer.

Fourth, trust account provisions must explain that the retainer will be held in the lawyer's trust account in accordance with the applicable law society rules and that funds will only be withdrawn after an account is rendered. Fifth, disbursement provisions should identify which costs the client will reimburse (court filing fees, examination for discovery transcripts, expert reports, travel) and any pre-approval requirements.

Sixth, termination provisions must address the client's right to terminate at any time, the lawyer's right to withdraw in accordance with the applicable rules of professional conduct, the notice period, the obligation to return files, and the timeline for refunding unused trust funds. Seventh, the agreement should address privacy obligations under PIPEDA and applicable provincial privacy legislation. Finally, the agreement should include a no-guarantee-of-outcome disclaimer, a dispute resolution clause, and governing law provisions specifying which province's laws apply.