For personal tax season in Canada

A T1 engagement letter for the Canadian tax season

A T1 looks like the simplest thing a practice does, which is why its letter usually says the least. Most of the arguments start in what the letter left out.

The client believes the return covers everything that happened to them this year. It covers what they told you about. A T1 letter's job is to close that gap in writing: which slips and schedules you are preparing, which forms you are not, and who answers for the numbers.

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T1 engagement letter

The full letter in Word and PDF, written for Canadian practices, with the T183, foreign property and CRA review clauses.

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Use the free engagement letter generator

Type in your firm, the client, the scope and the fee, and it writes a complete engagement letter for Canada, ready to print or save as a PDF. Nothing you type is stored.

Next step: send it to the client through FirmHello, where it stays on their record beside everything else they send you.

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It also has to deal with what is particular to Canada: the T183 the client signs before you transmit, the difference between the April 30 payment date and the June 15 filing date for the self-employed, and the fact that answering a CRA review is a different job from preparing the return.

What a T1 letter has to pin down

Five clauses separate a personal tax letter that holds from one that gets argued about in May.

  1. 1

    Which return, and which schedules

    Name the taxpayer and the year, then list what you will prepare: the T1 and the provincial return, and whichever of business income (T2125), rental income (T776), capital gains and the principal residence designation apply. A spouse's return is a second engagement unless the letter says otherwise. A Quebec resident also files a TP-1 with Revenu Québec, which is a separate return.

  2. 2

    Foreign property, asked about directly

    A client whose specified foreign property cost more than $100,000 at any point in the year must file a T1135 with the return, and the penalty for filing it late runs by the day. The letter should say the client will tell you, and whether the form is in scope.

  3. 3

    The T183, signed before you file

    You transmit the return; the client authorizes it by signing Form T183 first, and you each keep a signed copy for six years. Put that order of events in the letter, so nobody expects a return filed on the strength of an email.

  4. 4

    Two dates, not one

    A self-employed client and their spouse or common-law partner have until June 15 to file, but any balance is still due on April 30. Clients hear "June" and pay late. State both dates, and the date you need records by to meet them.

  5. 5

    Reviews are a separate job

    If the CRA selects the return for a review or asks for documents, answering is work the preparation fee did not price. Say so, and say how it is billed.

The T1 engagement letter

Written for Canada. The downloads are the same text, as a Word document to edit and a PDF to put on your letterhead.

[Firm letterhead]

[Date]

[Client name]
[Client address]

Dear [Client name],

The engagement

We will prepare and electronically file your [year] T1 income tax and benefit return, together with your [province] provincial return, from the information and documents you give us. This includes [employment and investment slips / business income (T2125) / rental income (T776) / capital gains and losses / the principal residence designation / Form T1135].

What is not included

This engagement does not include a return for any other person, including your spouse or common-law partner; [a Quebec TP-1 return]; instalment calculations; tax planning or advice; bookkeeping; or responding to any review, audit or reassessment by the Canada Revenue Agency. We will quote for any of these separately if you ask us to.

Your responsibilities

You are responsible for the accuracy and completeness of the information you give us, and for keeping the receipts and records that support it for at least six years. We will rely on what you provide without auditing or verifying it.

You will tell us if, at any time in the year, you held specified foreign property with a total cost of more than $100,000, sold a property you had lived in, or received income from outside Canada.

We need all slips and records by [date]. If they arrive after that date we may not be able to file by the deadline, and additional work caused by the delay will be charged at [rate] per hour.

Filing and your authorization

Before we file, we will send you the completed return and Form T183. We will not transmit the return until you have reviewed it and signed the T183, and we will each keep a signed copy for six years. By signing it you confirm that the information in the return is correct and complete.

Your return is due on April 30, [year]. If you or your spouse or common-law partner carried on a business, the filing deadline is June 15, but any balance owing is still due on April 30. Interest runs on a balance not paid by April 30, and a penalty applies to a return filed late.

Dealing with the CRA for you

If you would like us to speak to the Canada Revenue Agency on your behalf, you can authorize us through My Account, or give us the details we need to request access through Represent a Client. Authorization lets us correspond with the CRA for you; responding to a review or reassessment is outside this engagement unless we agree it in writing.

The limits of this work

This engagement is the preparation of a tax return. It is not an audit or review of your affairs, and it will not necessarily detect errors, omissions or fraud in the information you provide.

Fees

Our fee is [amount] in Canadian dollars, plus applicable GST/HST, invoiced when the return is ready for your signature and payable within [number] days. The fee does not depend on the size of any refund or balance owing.

Confidentiality and your information

We keep your information confidential, hold it in accordance with PIPEDA or the provincial privacy law that applies to us, and retain our working papers for [number] years.

Agreement

Please sign and return a copy of this letter to confirm these terms.

Yours sincerely,
[Name], [Firm name]

Agreed by [Client name]:

Signature ______________________ Date ____________

Before you use this

Supplied as-is, with no guarantee. These templates are general information, not legal advice, and not a substitute for it. Have your own legal adviser review and adapt one to your practice and your jurisdiction before you put it in front of a client. FirmHello accepts no responsibility or liability for any use made of them.

Where T1 engagements go wrong

The rental nobody mentioned

It surfaces in a matching review eighteen months later. A letter that lists what you were told about makes the omission the client's rather than yours.

June 15, heard as a payment date

A self-employed client files on time and pays late, and the interest arrives as a surprise. State both dates in the letter and again when you send the return.

Filed on a verbal yes

The return goes in before the T183 comes back, and the client later disputes a figure. The signed T183 is the record that they saw the return and approved it.

Questions about T1 engagement letters

Do I need a new T1 engagement letter every year?

Most firms issue one each season, because the fee, the schedules and the client's circumstances change. A letter from three years ago describing a return with no rental property is weak evidence of what was agreed for this one.

Can one letter cover a couple?

It can, if it names both taxpayers and both returns and each of them signs. Many firms prefer two letters: two returns are two engagements, and one spouse may stay a client after the other leaves.

Is the T183 a substitute for an engagement letter?

No. The T183 authorizes electronic filing and records the client's declaration. It says nothing about scope, fees or what happens when records are late, so it sits alongside the engagement letter rather than replacing it.

Should the letter still mention Form T1013?

No. Since July 2025 an individual authorizes a representative through My Account, or the representative requests access through Represent a Client; the paper route is Form AUT-01. A letter that tells clients to sign a T1013 is out of date.

Can I charge a percentage of the refund?

Not for preparing the return. The CPA codes of professional conduct, including CPA Ontario's, do not allow a fee for preparing a tax return to be contingent on its result. Set a fee that stands whatever the refund.

What changed

  • Added an editable Word (.docx) copy of the letter beside the PDF.

The letter is the easy half

Sending it, getting it back signed, and finding it again in two years is the half that eats the week. That is what the portal is for.

No card and no sales call. If you would rather tell us about your firm first, use the longer form.