The kids are gone. The cottage covers the summers. Somewhere warm covers the winters. And the family home sits there, mostly or completely paid off, quietly worth more than anything else you own. Do you sell it and invest the proceeds — or keep it and turn it into a rental? Here’s what actually happens when you do the second thing, and why the tax consequences run deeper than the income line.
Let me set the scene, because it’s probably close to yours.
The house is done its job. It raised the kids, it survived the renovations, and the mortgage is either gone or nearly gone. You’re not living in it as much anymore — the cottage on Lake Huron (for me) owns the summer, and winter is a sunny condo or a rolling set of travel plans. The house has become a very expensive place to store furniture.
So you’ve got a fork in the road. Sell it, pocket a large tax-free cheque, and invest the proceeds into something that pays you. Or keep it and rent it out, collecting income on an asset that’s already paid for while it (hopefully) keeps appreciating.
The rental pitch is seductive, and it usually gets sold to you like this: the mortgage is gone, so the rent is almost all income, and you still own a piece of real estate that goes up over time. Why would you ever sell?
I’ve run this one carefully, because it’s a live question in my own house (for the future). And the honest answer is that renting out your primary residence is a real option — but it’s not the free money it looks like, and the biggest cost isn’t the income tax you’ll pay on the rent. It’s what happens to your principal residence exemption, your cottage, and the shape of your net worth the moment you hand over the keys.
Let’s take it apart.
What actually happens the day you rent it out
Here’s the part almost nobody mentions at the kitchen table: the day your home stops being your home and starts being a rental, the Canada Revenue Agency treats it as a change in use — and a change in use triggers a deemed disposition.
Under subsection 45(1) of the Income Tax Act, you are deemed to have sold the property at fair market value on the day the use changes, and to have immediately re-bought it at that same value — even though no money changed hands and you still hold the title. That deemed sale sets a new adjusted cost base (ACB) for everything that follows.
Now, the good news, and it’s genuinely good: because the place was your principal residence the entire time you owned it up to that point, the gain crystallized on that deemed sale is fully sheltered by the principal residence exemption (PRE). If you bought decades ago for $350,000 and it’s worth $1.2 million the day you rent it, that ~$850,000 gain is tax-free. You don’t lose the exemption you’ve already earned. That’s yours.
The bad news is everything after that day. From the moment of change in use forward, the house is an investment property in the eyes of the CRA. Every dollar it appreciates from here is a taxable capital gain when you eventually sell — 50% of it added to your income at your marginal rate (the inclusion rate is still 50%, by the way; the proposed jump to two-thirds was cancelled in 2025, so ignore the headlines that are still floating around).
So the real trade isn’t “keep the exemption or lose it.” It’s subtler and more expensive than that:
You keep the tax-free gain you’ve built. You give up all the future tax-free growth — and you convert a tax-free asset into a fully taxable one going forward.
That’s the consequence you were half-remembering. Let’s make it worse, then show you the escape hatch.
The escape hatch: the subsection 45(2) election
You don’t have to accept the deemed disposition on day one. You can file an election under subsection 45(2) — a signed letter to the CRA, filed with your return for the year the use changes (there’s no official form; it’s a letter) — that says, in effect, pretend the change in use never happened.
The 45(2) election does two things:
It defers the deemed disposition. No crystallization, no forced tax event on a sale that didn’t really happen. That matters, because a deemed disposition can hand you a tax bill with no cash from a sale to pay it — and when the future gain is the taxable kind, that’s a real risk.
It lets you keep designating the home as your principal residence for up to four more years, even while it’s rented out and you’re not living there. Those four years of appreciation stay under the PRE umbrella.
But the 45(2) election comes with a hard string attached: you cannot claim Capital Cost Allowance (CCA) on the property. Claim one dollar of depreciation and you void the election — the CRA treats the change in use as having happened after all, and you’re back to a deemed disposition. So the election and the CCA deduction are mutually exclusive. For a paid-off home you plan to hold, skipping CCA is usually the right call anyway (claiming it just sets up recapture down the road), but know that you’re giving it up.
One more nuance worth having in your back pocket: the four-year cap can stretch indefinitely if you moved out because of an employment relocation at least 40 km away, under arm’s-length conditions. For most empty-nesters that door doesn’t apply — you’re not relocating for a job, you’re relocating for the beach — so plan around the four years.
The cottage problem nobody warns you about
Here’s where it gets sharp for people like us, because there’s a second property in the picture: the cottage.
The PRE runs on a simple, unforgiving rule — one property per family, per year. For any given year of ownership, you (and your spouse, as a single family unit) can designate one property as your principal residence. Not both.
So when you file that 45(2) election and keep designating the rented house as your principal residence for four more years, those are four years you cannot use to shelter the cottage’s gain. And the cottage has been appreciating too. Lake Huron waterfront has not exactly been getting cheaper.
This is the quiet cost that never shows up in the “the mortgage is paid off, so it’s all income” math. You’re not just deciding whether to rent the house. You’re spending PRE-designation years — a genuinely scarce resource — and every year you assign to the house is a year you can’t assign to the cottage. When you eventually sell the cottage, the exempt fraction is (1 + years designated) ÷ years owned, and you’ve just made the numerator compete with itself.
The right move is to actually run the numbers on gain-per-year for each property and designate whichever one shelters more tax over the overlapping years. But you can only do that if you know the rule exists before you accidentally trip it. Most people don’t, and they find out when they sell the cottage and the accountant asks a very pointed question about which years they already spent.
(For the mechanics of how the cottage side of this works — T776 co-ownership splits, the CCA decision, and the change-in-use math on a recreational property — see ⚠️ [the cottage Airbnb tax follow-up post] and ⚠️ [the wills and estate planning deep-dive], which touches how both properties pass to the kids.)
“Mostly income” is the part I’d push back on hardest
The whole rental case rests on the phrase the rent is mostly income. It sounds right — no mortgage, so where does the money go? But “mostly income” quietly does two misleading things at once, and they both cut against you.
First, gross rent is not net rent. Take a $1.2 million house renting for, say, $3,600 a month — $43,200 a year gross. That’s a gross yield of about 3.6%, which is generous for a detached house; residential real estate is a low-yield asset, and single-family homes are the lowest-yielding corner of it. Now subtract what actually comes off the top:
- Property tax (call it $7,000)
- Insurance, now at landlord rates (~$2,000)
- Maintenance and repairs reserve — 0.5% of value is conservative for an older home (~$6,000)
- Property management, because you’re wintering in Portugal and can’t fix a furnace by text (8–10% of rent, ~$4,000)
- A vacancy allowance, because tenants turn over (~5%, ~$2,000)
You’re into the low-$20,000s of actual net income before a single big-ticket surprise. One roof, one furnace, one flooded basement and the year is underwater. The gross number was 3.6%; the net number is closer to 1.8–2% of the capital tied up.
Second — and this is the tax point — that net rental income is the worst-taxed money in the Canadian system. It’s ordinary income, reported on Form T776, fully taxable at your marginal rate. No dividend tax credit, no 50% capital-gains discount. And because you paid off the mortgage, you have no interest expense to deduct — the one big shelter rental investors normally lean on, gone. A paid-off rental is, paradoxically, the least tax-efficient rental you can own.
Then there’s the retirement-income sting most people don’t see coming: the OAS clawback. Net rental income lands on Line 23600 at full value, and for the 2026 income year the recovery tax starts biting once net income crosses $95,323, at 15 cents on every dollar above it, with OAS fully gone by roughly $148,000. If you’re already drawing a RRIF, CPP, and OAS, a rental’s income can be the thing that quietly tips you into clawback territory — and you’re paying your marginal rate plus 15% on that rent. “Mostly income,” it turns out, can be mostly taxed.
The other road: sell, and invest the proceeds
Now play the tape on selling.
You list the house, pay your ~5% in realtor and legal friction (~$60,000 on $1.2M), and walk away with roughly $1,140,000 — completely tax-free, because the PRE shelters the entire gain. You still report the sale on Schedule 3 and file T2091 if required, but you write the CRA a cheque for zero. No deemed disposition games, no four-year clock, no CCA landmines, and — importantly — your cottage’s PRE years are left completely intact.
Put that $1.14M into a portfolio of eligible-dividend-paying Canadian equities at, say, a 4% yield and you’re collecting ~$45,600 a year — more than double the net rent, and taxed far more gently. Eligible Canadian dividends get the dividend tax credit, which for a retiree in a middle bracket can mean a strikingly low effective rate. On top of the cash, the portfolio itself appreciates, and that growth is only taxed at 50% inclusion, only when you choose to sell.
It’s not a free lunch, and I won’t pretend it is. The dividend gross-up is its own OAS trap: eligible dividends are grossed up 38% before they hit Line 23600, so $45,600 of cash shows up as roughly $62,900 for clawback purposes — more than the cash you actually received. So the dividend route has an OAS footprint too, sometimes a heavier one near the threshold. The clean fix is asset location: hold the growthy, dividend-heavy pieces inside the TFSA (invisible to the clawback entirely) and the RRSP, and let the non-registered sleeve lean toward capital gains. That’s a lever the rental simply doesn’t give you — a house can’t be moved into your TFSA.
Head to head
Here’s the same wealth, two ways, in round illustrative numbers (run your own — yours will differ):
| Rent the house | Sell & invest in dividends | |
|---|---|---|
| Capital deployed | $1.2M (illiquid, one asset, one city) | ~$1.14M after selling costs (liquid, diversified) |
| Annual cash income | ~$22K net rent | ~$45.6K dividends |
| Tax treatment of that income | Ordinary income, marginal rate, T776 | Dividend tax credit; gross-up affects OAS |
| Future appreciation | Taxable capital gain going forward | Taxable at 50%, only when you sell |
| PRE status | Spends/defers designation years; competes with cottage | Fully used, then done — cottage untouched |
| Liquidity | Sell the whole thing or nothing | Sell $10K at a time |
| Work | Tenants, repairs, management from abroad | A rebalance once a year |
| OAS clawback exposure | Net rent at full value | Grossed-up dividends; fixable via TFSA/RRSP |
Add it up and the total-return gap is real. The rental’s total return — roughly $22K of net rent plus maybe $48K of (taxable, deferred) appreciation on $1.2M — lands near 5.8%. A 4%-yield, 4%-growth equity portfolio on $1.14M runs closer to 8%, is liquid, is diversified, and asks nothing of you in January. The rental’s entire case rests on that one $1.2M house appreciating hard enough to close the gap — a concentrated bet on a single street, in a single city, in a single asset class.
Which is the line I keep coming back to:
Renting out the house you already own is exactly the same decision as buying a $1.2 million single-family rental in your own neighbourhood. If you’d never do that from scratch as an investment — and most of us wouldn’t — then “not selling” is that same bad trade wearing a disguise.
When renting actually wins
I don’t want to strawman it, because there are real cases where keeping the house is the smart, considered move:
You genuinely believe in the specific market. If you have a strong, informed conviction that this property in thislocation will appreciate well above a diversified portfolio’s total return, real estate’s concentration works for you. That’s a real thesis — just be honest that it’s a thesis, not a certainty.
Optionality matters to you. Rented, the house is still yours. You can move back in, hand it to a kid, or sell later into a stronger market. Selling is a one-way door; renting keeps the door open. Optionality has genuine value, and some people will pay for it in yield gladly.
You want an inflation hedge with rising cash flows. Rents ratchet up over time in a way a fixed dividend doesn’t automatically. In a high-inflation decade, a landlord’s income grows with the world.
Your portfolio is already all equities. If everything else you own is stocks, keeping a hard asset is diversification in the other direction. Concentration risk cuts both ways.
It’s the family home. This one isn’t in a spreadsheet, and I won’t pretend it isn’t real. Some houses aren’t just capital.
What I’d Actually Do
Strip away the sentiment and here’s how I’d run it in my own situation:
- Get a real appraisal before you do anything. You need a defensible fair market value on the change-in-use date regardless of which path you choose — it sets your ACB if you rent, and it’s your evidence if the CRA ever asks. Pay for the appraisal. It’s cheap insurance.
- Do the cottage math first, not last. Compare gain-per-year on the house versus the cottage over the years they overlap. Whichever shelters more tax per designated year gets the PRE years. This single calculation quietly decides whether renting the house is even affordable in exemption terms. Most people do it backwards and regret it.
- If I rent, I file the 45(2) election and I never touch CCA. Defer the deemed disposition, bank the four extra PRE years only if the cottage math says I can spare them, and keep the option to move back clean.
- Be brutally honest about the “mostly income” story. Net it out. Tax it at your real marginal rate. Add the OAS clawback. If the number that survives all that still beats a boring dividend portfolio you’d never have to think about from a beach in the Algarve — keep the house. In my running of it, it usually doesn’t, unless I have a specific, defensible reason to bet on that one property.
- Honestly? For most paid-off family homes, I lean toward selling — take the tax-free cheque, protect the cottage’s exemption, and rebuild the income inside a liquid, tax-efficient portfolio with the growthy pieces tucked into the TFSA and RRSP where the clawback can’t reach them. The rental only wins when you have a real conviction about that house, or when optionality is worth more to you than yield. Both are legitimate. Neither is “mostly income.”
The point isn’t that renting is a mistake. It’s that “just rent it out, the mortgage is paid off” is a decision disguised as a non-decision — and it’s one of the most expensive non-decisions in Canadian retirement, once you count the exemption, the cottage, and the tax on every dollar of that rent.
(Related reading, if you’re deeper into this: how leverage and interest deductibility change the calculus in [The Smith Manoeuvre deep-dive]; why I’m skeptical of “keep it forever” logic in [the whole-life insurance teardown]; and the account-sequencing side in [the RRSP/TFSA drawdown post].)
This is what I’ve worked through for my own situation as a Canadian investor — it isn’t tax, legal, or financial advice, and I’m not a licensed advisor. The change-in-use rules, the 45(2) election, the PRE designation math, and the OAS thresholds are unforgiving and fact-specific, and a wrong step (a stray CCA claim, a missed election letter, the wrong property designated) can cost real money. Confirm every number and every election against current CRA guidance and run your actual situation past a CPA and, where the cottage and estate overlap, a tax lawyer, before you do anything. Figures above are illustrative round numbers, not forecasts.