№ 374 Underwriting

A self-employed borrower on a two-year average: start to funded.

The math behind a two-year self-employed average is simple. Getting a lender to read a dip-then-recovery pattern as an explained event instead of a red flag is the part that actually takes work. Here's an illustrative, start-to-finish walkthrough of a file like this.

Underwriting 8 min read By the Treadstone Associates team · Canada Updated 2026-07

Key takeaways

  • This is a composite, illustrative scenario built to show how a file like this typically moves — it isn't a real Treadstone client file.
  • A two-year average doesn't change because a broker asks nicely — what changes is whether the underwriter reads a low year as unexplained instability or a documented, one-time event.
  • The fix is almost always the same: a letter of explanation tied to a specific, verifiable cause, plus current documentation showing the recovery is real and ongoing.
  • Self-employed files that arrive with this context built in move in one round. Files that arrive without it generate a request for it anyway — just slower, and after a first read that already assumed the worst.

Here's an illustrative, composite scenario — not a real client file — built to show how a self-employed file with an uneven two-year average typically moves from intake to funded, and exactly where it usually gets stuck along the way.

Say the borrower is a self-employed graphic designer, incorporated as a sole proprietorship, six years into the business. Two years ago she lost her largest retainer client and her reported income fell hard; last year she rebuilt her client base and income rebounded well past where it started. Nothing about the file is unusual — this exact shape of dip-then-recovery shows up constantly in self-employed underwriting. What it does is create a specific, predictable snag, and walking through it shows what “packaging a self-employed file properly” actually means in practice.

01 · What did this file look like walking in?

Two years of Notices of Assessment and T1 Generals, each reporting total income at line 15000 — the CRA's all-sources total income figure lenders typically start from for a self-employed borrower. Say the older year showed $58,000 after the lost retainer; the more recent year showed $101,000 once the client base rebuilt. A straight two-year average lands at roughly $79,500.

On paper, that average should qualify the purchase comfortably. The complication wasn't the arithmetic — it was how the shape of those two numbers, submitted without context, reads to an underwriter seeing the file cold.

02 · Why did the two-year average become the sticking point?

A 43% jump from one year to the next doesn't look like growth on first read — it looks like volatility, and volatility is exactly what a two-year average is designed to smooth out and flag. Submitted with no narrative, the file came back with a request that's common on self-employed files: an explanation for the decline, current-year evidence that the increase is holding, and a review of what was actually claimed as a business expense in the lower year.

None of that is a decline — it's a single client loss with a documented, dated cause. But the underwriter reviewing the file has no way to know that from two Notices of Assessment alone, and won't assume it in the borrower's favour.

03 · How did the file get repackaged?

The resubmission didn't change either year's income — it added the context that turns two disconnected numbers into one coherent story:

  • A short, specific letter of explanation naming the lost retainer client and the date the contract ended — not a vague reference to “a slow year.”
  • Current-year interim financials and a handful of recent invoices showing the rebuilt client base isn't a one-quarter spike but a sustained run rate consistent with the stronger year.
  • A note on any non-recurring or non-cash items claimed as business expenses in the lower year, since those can matter to how a lender reads that year's qualifying income calculation.
  • A short accountant confirmation that the business is currently stable — not a forecast, just a factual statement of present standing.

This is exactly the discipline covered in our broader piece on how Canadian lenders read self-employed income: the averaging convention doesn't move, but what the underwriter believes about the trend behind it absolutely does.

Self-employed files, packaged right the first time

Every self-employed file gets the narrative, not just the numbers.

Treadstone's fulfillment associates build the explanation alongside the calculation on every non-standard income file, so it reaches the lender pre-answered instead of pre-flagged.

04 · How did the file actually fund?

The lender underwrote to the same two-year average it would have used either way — that part of the calculation was never in dispute. What changed was the number of rounds it took to get there: one clarifying letter and a short document set, rather than a back-and-forth that treats every ambiguous line as a fresh question.

The file cleared conditions and funded on the timeline the purchase agreement needed, which is the entire point of packaging a self-employed file this way — not a better number, a faster and more predictable path to the same number.

05 · What does this file teach about self-employed underwriting generally?

Self-employed income is rarely flat, and lenders know that going in — per OSFI Guideline B-20, sound underwriting means assessing a borrower's actual capacity, not just running a mechanical average and stopping there. But an underwriter can only assess what's in front of them. An unexplained dip and an explained one produce completely different reads, even against identical numbers.

The practical rule: any year that moves meaningfully — up or down — needs a one-line reason attached before it ever reaches a lender, not after they ask for one.

06 · How can a broker avoid the same delay on the next file like this?

  1. 01Pull both years' Notices of Assessment at intake and eyeball the year-over-year swing before submission, not after a lender flags it.
  2. 02For any swing over roughly 20–25%, draft the letter of explanation proactively — don't wait to be asked.
  3. 03Attach current-year evidence (interim statements, recent invoices, a few months of business bank statements) whenever the most recent completed year is the stronger one.
  4. 04Loop in the borrower's accountant early; a one-paragraph confirmation from them carries more weight than the same paragraph from the broker.

Frequently asked questions

This article is general information to help you scale — not a substitute for tailored advice on your specific business, licensing, or compliance obligations. All figures are illustrative examples for planning purposes; actual costs vary by province, market, and brokerage.

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