Self-Employed Lending · Guide 2 of 7
The document that
carries the most weight
is the one you
did not write.
A salaried applicant has pay stubs and an employer who will confirm them. A business owner has neither, and the gap is filled by a single page from the Canada Revenue Agency. Most people file it unread. An underwriter will not.
Second of seven guides on self-employed lending. The first covers how lenders read the returns themselves.
Why does a mortgage lender want a Notice of Assessment?
Because you did not produce it. Under OSFI Guideline B-20, federally regulated lenders must verify income against an independent source that is difficult to falsify and that does not contradict other information the borrower has supplied. A Notice of Assessment is the Canada Revenue Agency’s own statement of what it assessed. A tax return says what you filed; the notice says what the government accepted.
For a salaried applicant, the independent source is usually a pay stub and an employment letter. A self-employed applicant has neither, so the weight shifts almost entirely onto documents the CRA generated. B-20 names both the Notice of Assessment and the T1 General explicitly for self-employed borrowers, alongside relevant business documentation.
Which produces a rule with no exceptions worth mentioning: if the income is not on an assessed return, it does not exist for mortgage purposes. Not because anyone doubts the business is earning it, but because there is no way to verify it that satisfies the guideline.
What is actually on a Notice of Assessment?
The Canada Revenue Agency lists five things: the notice details, a NETFILE access code, an account summary, the tax assessment or reassessment summary, and — where applicable — statements of registered plan room covering RRSP, the Home Buyers’ Plan, the Lifelong Learning Plan and the First Home Savings Account.
| Section | What it contains | What it tells a mortgage underwriter |
|---|---|---|
| Notice details | Last four digits of the SIN or temporary taxation number, the tax year, and the date the notice was issued | That the document is genuine, current, and belongs to the applicant |
| NETFILE access code | An eight-character code of numbers and letters | Nothing — but it confirms the notice is the original rather than a retyped summary |
| Account summary | A refund, an amount due, or a nil balance | Whether there is money owing to the CRA |
| Tax assessment or reassessment | A summary of the line numbers and amounts used to calculate the refund or balance | The assessed income figures, and whether they match the return supplied |
| Registered plan statements | RRSP deduction limit and contribution room, Home Buyers’ Plan, Lifelong Learning Plan, and First Home Savings Account participation room, where applicable | For a first-time buyer, what is available toward a down payment and what has already been used |
Contents as described by the Canada Revenue Agency. A notice of reassessment carries the same structure with revised figures.
Sources: Canada Revenue Agency — Notices of assessment — NOA or NOR
What does an underwriter read first?
The account summary and the assessed income, in that order. The account summary states in one line whether there is a refund, an amount due or a nil balance, so an outstanding tax debt is not something anyone has to look for. The assessed income figures are then checked against the return that was supplied with the application.
Three things routinely cause friction, and all three are visible on the page:
- A balance owing. Unpaid tax is a debt, and it is a debt owed to a creditor with unusually strong collection powers. It does not automatically stop an application, but it will need an answer. The answer “I did not realize” is the weakest available.
- A reassessment that moved the numbers. If the CRA revised the income, the revised figure is the real one. Supplying the original assessment alongside a return that reflects the reassessment creates precisely the contradiction B-20 tells lenders to treat as a warning sign.
- A missing year. Two years is the norm for self-employed applicants. An unfiled return is not a gap in the paperwork; it is a gap in the income history.
Each of these is far cheaper to address at the start of an application than in week three of one. None of them is a reason not to apply — they are reasons to apply with the answer already prepared.
How do I get copies of my Notices of Assessment?
Two ways, per the Canada Revenue Agency: sign in to your CRA account online to view and print them, or call 1-800-959-8281 to request a paper copy or an alternate format. The online route is immediate. A mortgage application typically needs the last two years, so both are worth downloading before the application rather than during it.
A short piece of housekeeping that saves days: download the last two notices, save them as PDFs with the tax year in the filename, and keep them with the corresponding T1 General and, if self-employed, the T2125 or financial statements. That single folder answers most of what an underwriter will ask for.
Two related notes:
- Screenshots of an online account are not the document. Lenders generally want the notice itself. Print or download it properly.
- An express notice from tax software is not always accepted in place of the CRA’s own notice. Where there is doubt, retrieve it from the CRA account.
Sources: Canada Revenue Agency — Notices of assessment — NOA or NOR
Does the Notice of Assessment help a first-time buyer beyond verification?
Yes. Where applicable it sets out RRSP deduction limit and contribution room, Home Buyers’ Plan participation, Lifelong Learning Plan participation, and First Home Savings Account participation room. For anyone assembling a down payment, that makes the notice a planning document rather than only a verification one.
Down payment planning usually happens in a spreadsheet built from memory. The notice replaces the memory with the CRA’s own record: how much RRSP room exists, how much of the Home Buyers’ Plan has already been used and therefore how much remains, and what First Home Savings Account room is available. Those are the three numbers most first-time-buyer plans get wrong.
The question index covers the mechanics of the FHSA and the Home Buyers’ Plan. What belongs here is simply the observation that the answers are already in your own mail.
The one document
you did not write.
Why the Notice of Assessment carries more weight than anything you can produce yourself.
See all questionsWhy do mortgage lenders ask for a Notice of Assessment?
Because the borrower did not write it. OSFI Guideline B-20 requires federally regulated lenders to verify income against an independent source that is difficult to falsify, and a Notice of Assessment is the Canada Revenue Agency’s own confirmation of what was assessed for the year. A tax return states what you filed. The Notice of Assessment states what the government accepted. For a self-employed borrower with no pay stubs and no employer to call, it is the strongest income document in the file.
What is on a Notice of Assessment?
The Canada Revenue Agency lists the notice details, including the last four digits of the social insurance number, the tax year and the date the notice was issued; a NETFILE access code; an account summary showing a refund, an amount due or a nil balance; the tax assessment or reassessment summary of line numbers and amounts; and where applicable, statements of RRSP deduction limit and contribution room, Home Buyers’ Plan, Lifelong Learning Plan and First Home Savings Account participation room.
What does a balance owing on my Notice of Assessment mean for a mortgage?
It means a question you should answer before it is asked. The account summary on the notice states plainly whether there is a refund, an amount due, or a nil balance, so an outstanding balance is not something an underwriter has to dig for. Unpaid tax is a debt like any other and lenders treat it accordingly. If there is an amount owing, the useful move is to know the number, know the plan for it, and raise it at the start of the application rather than midway through.
What is the difference between a Notice of Assessment and a Notice of Reassessment?
An assessment is the Canada Revenue Agency’s first response to a filed return. A reassessment is a later revision after something changed — an adjustment you requested, a review, or an audit. Both are documents a lender may ask for. What matters for a mortgage file is that the figures being relied on are the current ones: a reassessment that moved the income is the version that counts, and offering the superseded assessment instead creates exactly the contradiction that OSFI Guideline B-20 tells lenders to watch for.
How do I get a copy of my Notice of Assessment?
Sign in to your CRA account online, where notices can be viewed and printed, or call the Canada Revenue Agency at 1-800-959-8281 to request a paper copy or an alternate format. Retrieving them online is immediate, which matters because a mortgage application typically needs the last two years and a missing notice can hold up a file for days. It is worth downloading both before an application rather than during one.
Does my Notice of Assessment show my RRSP room for a first home purchase?
Yes, where applicable. The Canada Revenue Agency states the notice includes statements of RRSP deduction limit and contribution room, along with Home Buyers’ Plan, Lifelong Learning Plan and First Home Savings Account participation room. For a first-time buyer that makes the notice a planning document as well as a verification document — it says in one place how much RRSP room is available, and what has already been used under the Home Buyers’ Plan.
This page is education, not advice. Talk to a qualified tax professional before implementing any tax-related mortgage strategy. Results shown are hypothetical illustrations only. Borrowing to invest involves risk. Read the full disclaimer.