Tax Lawyers
Tax Lawyers: directory of firms
Tax lawyers work where tax meets the law: disputes with the Canada Revenue Agency, audits, objections, appeals to the Tax Court of Canada, and advice on positions a taxpayer expects to have to defend. Their clients include individuals facing a reassessment they cannot explain, businesses in the middle of an audit, and people who have not filed for years and want to put it right before the agency finds them.
Browse tax lawyers by city, and see what to check before you hire.
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On this page
The work overlaps with accounting without being the same thing. An accountant prepares, files, computes and reconciles; a tax lawyer argues how the legislation applies to the facts, runs the dispute process and handles questions of privilege and evidence. On many files both are involved, which works best when there is a written agreement from the start about who is doing what.
The calendar drives everything. Objections, extension applications and appeals all run on fixed periods set by statute, and missing one can end a dispute regardless of who was right on the merits. LokalMatch lists tax lawyers so you can approach firms directly; we don't sell requests for this service, and we neither screen nor recommend anyone. This guide is general information, not legal or financial advice.
What tax lawyers do
- Disputes: preparing a notice of objection, arguing it with the appeals area and, if necessary, appealing to the Tax Court of Canada.
- Audits: managing information requests and document demands, and the privilege questions that come with them.
- Voluntary disclosures: applying to the Canada Revenue Agency's Voluntary Disclosures Program to correct errors or omissions in past filings.
- Collections: dealing with the collections side of the agency while an objection or an appeal is still outstanding.
- Planning and opinions: reorganizations, trusts, estate freezes and cross-border structures, usually alongside the client's accountant.
- Matters beyond income tax: the Tax Court's jurisdiction covers appeals under a list of federal statutes, so goods and services tax, employment insurance and pension rulings follow the same broad dispute path.
From notice of assessment to the Tax Court of Canada
A dispute normally starts with a notice of assessment, reassessment or determination the taxpayer disagrees with. The agency's guide P148 sets the time limits for a notice of objection: corporations have 90 days from the date of the notice, while individuals and graduated rate estates have the later of one year after the filing deadline for the return and 90 days from the date of the notice. Where that window has closed, the guide describes an application for an extension, which must be made as soon as the taxpayer could and no later than one year after the objection deadline passed, and which requires showing that they were unable to object in time or intended to object.
Once the objection is filed, the appeals area reviews it. The same guide states that the Tax Court of Canada has to receive a notice of appeal within 90 days of the date the agency sends its decision, and that a taxpayer may also appeal if no decision has been given within 90 days of the day the objection was filed. The Court has exclusive original jurisdiction over appeals and references under a list of federal statutes that includes the Income Tax Act, Part IX of the Excise Tax Act, the Employment Insurance Act, the Canada Pension Plan, the Old Age Security Act and the Underused Housing Tax Act, among others.
Who may represent you at the Tax Court of Canada
Representation rules differ between the Court's two procedures. Its own frequently asked questions state that in Informal Procedure cases anyone can represent you, including yourself, an accountant, an agent or a lawyer. Under the General Procedure an individual may represent themselves or be represented by a lawyer, while a corporation must be represented by counsel unless it brings a motion to be represented by a director, an officer or another person the Court allows.
Court staff cannot fill the gap. The Court is explicit that the Registry cannot provide legal advice and that questions about how strong a case is are the sort it is not permitted to answer. Because lawyers are licensed provincially — the Federation of Law Societies of Canada is the national association of the 14 law societies mandated to regulate the profession in the public interest — the practical first step is to look the firm up in the register of the law society where it practises.
Tax lawyer or accountant: privilege and where each one fits
The clearest difference is privilege. Section 232 of the Income Tax Act defines solicitor-client privilege as the right a person has in the superior court of the province where the matter arises to refuse to disclose an oral or documentary communication on the ground that it passed between the person and the person's lawyer in professional confidence, and it deems a lawyer's accounting record, including any supporting voucher or cheque, not to be such a communication. Because the definition turns on the communication being with a lawyer, sensitive analysis of a position a taxpayer knows could be challenged is often done under a lawyer's retainer.
That does not make an accountant the wrong choice. Most tax work is accounting work: the numbers, the filings and the records that support them. Plenty of disputes are handled from beginning to end by the client's accountant, particularly under the Informal Procedure where the Court allows an accountant to appear. A common arrangement on a serious file is for the lawyer to lead and the accountant to do the computational work, with both scopes written down so nothing falls between them.
Signs a tax problem needs a lawyer rather than a preparer
- The disagreement is about how a provision of the legislation applies, not about a missing receipt.
- A statutory deadline is close: an objection period, an extension application or the Court's 90-day appeal window.
- You are being asked to hand over documents and are unsure what you are required to produce.
- You want advice on a filing position you expect to be challenged, and you care whether that advice stays confidential.
- Several years of returns are unfiled and a voluntary disclosure is under consideration.
- Amounts are in collection while the underlying assessment is still in dispute.
Traps in a tax dispute
- Objection periods run from the date on the notice, not from the day the envelope was opened.
- The outside limit on a late objection is fixed: the agency's guide says an extension application must be made no later than one year after the objection deadline passed.
- Collection and dispute are handled separately, so ask specifically what happens to the amount owing while the objection is outstanding.
- Appealing to the wrong forum wastes the window, since the Tax Court hears appeals only under the statutes within its jurisdiction.
- A voluntary disclosure has conditions and relief is granted case by case; the agency changed the program on October 1, 2025 to make it easier to apply and to understand.
- Informal reassurance from someone in the same business is not an opinion anyone can rely on later.
How tax lawyers charge
Tax files are usually billed hourly against a retainer, because how long a dispute takes depends partly on the agency. Discrete pieces of work are sometimes quoted as a fixed fee: a written opinion, a voluntary disclosure application or the preparation of an objection. Court filing charges, transcripts and any expert evidence are billed as disbursements on top of the fee.
Where both a lawyer and an accountant are engaged, agree in writing who instructs whom, who holds the file and who speaks to the agency. Duplicated work between two advisers is the most avoidable expense on a tax file, and the least noticed until the invoices arrive.
How LokalMatch lists tax lawyers
Tax law appears on LokalMatch as a directory. Firms describe their own practice, you make contact yourself, and no request is sold to a firm or passed to anyone else.
We do not verify results, rank firms, or suggest that one is the right answer for a dispute we know nothing about. Confirm the licence in the law society register, and take the deadline question to counsel first, because it is the only part of a tax dispute that cannot be repaired later.
Tax Lawyers: frequently asked questions
How long do I have to object to a reassessment?
The agency's guide P148 states that corporations have 90 days from the date of the notice of assessment or determination, while individuals and graduated rate estates have the later of one year after the filing deadline for the return and 90 days from the date of the notice. If that has passed, the guide describes applying for an extension, which must be made no later than one year after the objection deadline.
What if the Canada Revenue Agency never answers my objection?
P148 says you can appeal to the Tax Court of Canada if the agency has not given you a decision within 90 days of the day you filed your objection. Where a decision has been sent, the Court has to receive the notice of appeal within 90 days of the date it was sent.
Can my accountant represent me at the Tax Court of Canada?
Under the Informal Procedure, yes: the Court states that anyone can represent you, including yourself, an accountant, an agent or a lawyer. Under the General Procedure an individual may act for themselves or be represented by a lawyer, and a corporation needs counsel unless the Court grants a motion allowing a director or officer to appear.
Are my conversations with my accountant privileged?
Section 232 of the Income Tax Act defines solicitor-client privilege by reference to communications passing between a person and that person's lawyer in professional confidence, and deems a lawyer's accounting record not to be such a communication. Where confidentiality of the advice itself matters, that distinction is the reason sensitive analysis is often commissioned through a lawyer.
I have years of unfiled returns. What are my options?
The Voluntary Disclosures Program grants relief on a case-by-case basis to taxpayers and registrants who come forward to fix errors or omissions in their filings, and the agency changed it on October 1, 2025 to make applying and understanding it easier. Eligibility conditions apply, so take advice before contacting the agency rather than after.
Sources
- CRA guide P148: Resolving your dispute — objection and appeal rights under the Income Tax Act
- Tax Court of Canada: Jurisdiction
- Tax Court of Canada: Frequently asked questions
- Income Tax Act, section 232 (solicitor-client privilege)
- CRA: Voluntary Disclosures Program overview
- Federation of Law Societies of Canada
Written by the LokalMatch editorial team. Last reviewed September 14, 2026. How we write and check our guides
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What affects the fees tax lawyers charge
Fees depend on the work involved and how the professional bills. We only publish fee ranges when they’re backed by real LokalMatch data or reliable sources. Until then, here’s what usually changes the fee:
- Scope and complexity of the work
- How the professional bills: hourly, flat fee or retainer
- Experience and seniority of the person doing the work
- Deadlines and how urgent the work is
- Third-party costs such as filing, registration or government fees
How to compare tax lawyers before you hire
- Check that they are licensed or registered for this work where you live, on the regulator’s public register.
- Look for experience with matters like yours, and ask who will actually handle your file.
- Ask how they charge before any work starts, and get the terms in writing.
- Compare two or three professionals before you decide.
- Be wary of anyone who guarantees a particular outcome.
Questions to ask tax lawyers before you hire
- Are you licensed or registered for this work, and with which body?
- Have you handled matters like mine before?
- Who will do the work, and who will I deal with day to day?
- How do you charge: hourly, a flat fee or a retainer?
- What is included in your fee, and what costs extra?
- Will you confirm the scope and fees in a written engagement letter?
- Do you carry professional liability insurance?
Licences and registration
This kind of work is often limited to licensed or registered professionals, and the rules depend on where you are. Ask which body they’re registered with, and check their status on that body’s public register before you hire.
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