The core issue
Non-arm's-length employment means the pay rate, hours, job title and continuity of the role aren't set by an impartial employer negotiating at arm's length — they're set by a family member, which creates room, intentional or not, for a T4 to be shaped around what qualifies for a mortgage rather than around genuine economic necessity.
What counts as non-arm's length here
This isn't only about a parent employing an adult child. If the borrower or their spouse holds any meaningful ownership stake in the business paying the T4, many lenders will look through the T4 and underwrite the file as self-employed income instead — covered in full in Course 03, Self-Employed & Incorporated Borrowers — regardless of what slip was actually issued. The T4 format doesn't settle the question if the borrower effectively controls the business paying it.
Extra documentation to expect
A longer T4/NOA history than the standard two years is common, along with the business's own financial statements or T2 to confirm it can genuinely support the payroll being claimed, and sometimes direct confirmation from the business's accountant that the arrangement reflects a real, ongoing employment relationship rather than a paper one.
Getting ahead of it
Because the extra request is close to guaranteed on a family-business file, the efficient move is to provide the fuller package — T4s, NOAs, employment letter, and some evidence of the business's underlying health — upfront rather than waiting for the underwriter to ask for it one document at a time.
When it's genuinely arm's length in substance
A borrower working for a family member's business in a role clearly independent of ownership — comparable pay to unrelated employees in the same position, a long and stable tenure, no ownership stake — has a much easier case to make. Documenting that comparability directly, rather than hoping it's assumed, is what actually moves the file forward.
