Renting Out the Family Home: The Election That Saved Six Figures

The situation

Navdeep and Amrit had owned their North Bay home for twenty-two years. They raised their family there, ran a local business together for most of that time, and eventually sold the business when they retired. With more free time and fewer ties to any one place, they began spending winters away and found they no longer needed the full house year-round.

Their son Feng, who worked as a gig driver and took on freelance delivery and courier contracts, was looking for a stable place to live while he built up his income. Rather than sell the house or leave it empty, Navdeep and Amrit rented it to him at a fair market rent — the same amount they would have charged any tenant. It seemed like the obvious, low-risk choice: familiar tenant, steady income, a house that stayed in use.

Two years later, a letter from the Canada Revenue Agency (the CRA, which administers federal income tax) arrived asking them to explain how they had reported the change in the property's use. Neither of them had reported anything, because neither of them realized there was anything to report.

The problem

Under the Income Tax Act, a property stops being treated as your principal residence the moment it stops being used mainly for you to live in and starts being used to earn income — including rental income from a family member paying fair rent. The law does not care that Feng was their son rather than a stranger; what matters is that the arrangement was a genuine rental at a market rate, entered into for profit.

That change of use is treated, for tax purposes, as if Navdeep and Amrit sold the house to themselves at its fair market value on the day the rental began, and immediately bought it back at that same value. This is called a deemed disposition. If the deemed sale price is higher than what they originally paid, the difference is a capital gain — and capital gains are taxable, generally at half the taxpayer's normal income tax rate on half of the gain.

The house had cost roughly $145,000 when they bought it. By the time Feng moved in, it was worth roughly $735,000. That put the deemed gain at close to $590,000 — the kind of number that turns a well-meant family arrangement into a significant tax problem. Because the CRA had no record of an election being filed and no capital gain reported for that year, it reassessed Navdeep and Amrit for tax on the full amount, plus interest that had been accumulating since the year of the change.

The reassessment put roughly $590,000 of gain squarely in dispute, with the resulting tax bill running into six figures once interest was added — well beyond anything the couple had budgeted for in retirement.

What we did

1. Confirmed the change-of-use rules actually applied. We reviewed the rental arrangement, the rent Feng had been paying, and the timeline of when he moved in. The rent was consistent with market rates for a comparable home, which meant the CRA's position that this was a genuine income-producing use — not a casual family favour — was very likely correct on the facts. Rather than fight that point, we focused on the far stronger argument available to them: the deferral election they should have filed but had not.
2. Explained the election Navdeep and Amrit never knew existed. The Income Tax Act allows a taxpayer who changes a property from personal use to income-producing use to elect out of the deemed disposition. Filing this election lets the change happen without an immediate tax bill, and — critically — it allows the taxpayer to continue treating the property as their principal residence for up to four additional years, even while it is rented out, provided they do not claim capital cost allowance (a tax deduction for the depreciation of income-producing property) on the building during that period.
3. Verified they qualified for the full deferral. We checked Navdeep and Amrit's tax filings for the two years since Feng moved in and confirmed they had never claimed capital cost allowance on the house. This mattered enormously: claiming even a small depreciation deduction would have disqualified the election outright and locked in the deemed disposition. Because they had simply reported the rental income and ordinary expenses without touching capital cost allowance, the door was still open.
4. Filed a late election with a full explanation. The election is normally filed with the tax return for the year the change of use occurs, but the CRA has discretion to accept a late election, generally along with a reasonable explanation for the delay and, in most cases, a late-filing penalty. We prepared the election, set out the family circumstances plainly and honestly, and submitted it together with a written response to the reassessment explaining why the deemed disposition should not stand.
5. Confirmed the four-year clock and its conditions with the couple. The election does not erase the eventual tax consequence forever — it defers it, and only for up to four years, and only if Navdeep and Amrit did not designate any other property as their principal residence during that stretch and continued to meet the other conditions. We walked them through exactly what would need to be true when the four years ran out, including what would happen if they sold the house, moved back in, or bought a second property in the meantime.
6. Followed up directly with the CRA auditor. Elections filed late alongside a reassessment dispute do not always get matched to the right file automatically. We stayed in contact with the CRA reviewer handling the file to confirm the election had been received, logged, and applied before the reassessment was finalized.

The outcome

The CRA accepted the late-filed election. The reassessment on the roughly $590,000 gain was withdrawn, and Navdeep and Amrit's tax position reverted to what it should have been all along: no immediate tax owing on the change of use, and the house still treated as their principal residence going forward, within the four-year window the election allows.

The relief was not indefinite, and we made sure the couple understood that clearly. If they had not sold the house, moved back into it themselves, or otherwise resolved its status before the four years expired, the deferred gain would eventually come due — either on a future sale or once the exemption period ran out. We set a reminder well ahead of that deadline so they would have time to plan, whether that meant selling, moving back in, or accepting a partial gain on the portion of time beyond the exemption.

Feng, for his part, was relieved to learn the arrangement that had helped him get on his feet hadn't put his parents' retirement at risk. The family kept the rental going, now with the paperwork in order and a clear sense of the calendar they were working against.

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