ImmoMulti — a direct buyer of income properties on the North Shore — says it at every valuation: a plex's price depends not only on its rents, but also on the return the market demands at the moment of sale. That required return is the capitalization rate (cap rate), known in Québec as the taux global d'actualisation (TGA). And it moves largely in step with interest rates. When rates rise, cap rates tend to rise and, at equal net operating income (NOI), the value of an income property falls. When rates come back down, the opposite happens. Understanding this mechanic — value = NOI ÷ cap rate — is essential to deciding the right time to sell your plex.
How the value = NOI ÷ cap rate formula governs your plex's price
The value of an income property is obtained by dividing net operating income (NOI) by the capitalization rate (cap rate). NOI is in the numerator, the cap rate in the denominator: the higher the required cap rate, the lower the price for the same NOI. This is the income approach used by appraisers and multi-unit buyers.
Net operating income (NOI) is normalized rental income minus operating expenses (taxes, insurance, maintenance, management), but before mortgage debt service. The cap rate expresses the return the market demands for this type of building. According to Collège MREX, it is obtained by dividing a recently sold building's normalized NOI by its transaction price: a 10-unit building producing $100,000 in NOI and sold for $1M traded at a 10% cap rate.
The consequence is powerful: at identical NOI, value moves inversely to the cap rate. As Collège MREX illustrates, a 10-unit building generating $78,000 in normalized net revenues is worth $780,000 at a 10% cap rate, but $1,560,000 at a 5% cap rate. The same building, the same rents — and a value that doubles based on the cap rate the market demands alone.
Source: Collège MREX — "Le TGA et les RNN : comment façonnent-ils la valeur d'un bloc appartement?"
Why interest rates push the cap rate higher
When interest rates rise, two forces push the cap rate up: mortgage financing costs more (reducing what a buyer can pay), and safe investments offer a better yield (making real estate less attractive at a low cap rate). Buyers therefore demand a higher cap rate, and the price falls at equal NOI.
The cap rate is not a fixed number: it is the price of risk at a given moment. An income-property buyer always compares your plex's return with other options — bonds, high-interest accounts, other buildings. When the Bank of Canada raises its policy rate, this entire yield landscape shifts upward. To stay competitive, real estate must also offer more — hence a higher cap rate.
But a higher cap rate in the denominator mechanically means a lower price for the same NOI. This is exactly what Collège MREX points out: a plex's price and its cap rate are inversely correlated — if the price falls, the cap rate rises, and vice versa. Rising rates do not "destroy" your building's value: they raise the required cap rate, which compresses the listed price.
The rule to remember
Interest rates ↑ → required cap rate ↑ → price ↓ (at equal NOI). Interest rates ↓ → required cap rate ↓ → price ↑ (at equal NOI). And NOI ↑ (rents, ancillary income) → price ↑, even if the cap rate stays flat.
What rates and the Québec plex market say in 2026
On June 10, 2026, the Bank of Canada held its policy rate at 2.25%. That stability, well below the 2023 peaks, supports cap rates and prices. According to APCIQ, in the first quarter of 2026, half of all plex transactions exceeded $675,000, an 8% increase year over year.
After the rate shock of 2022–2023, the 2026 context is gentler. The Bank of Canada held its target for the overnight rate at 2.25% on June 10, 2026 — a level well below the previous cycle's peaks. This stability eases upward pressure on cap rates: buyers finance at more predictable costs and accept tighter cap rates.
The plex market reflects this. According to APCIQ, in the first quarter of 2026, half of all plex transactions exceeded $675,000, an 8% increase year over year. The association notes that the stability of mortgage rates, now well below the 2023 peaks, is a positive factor for the 2026 market. This is the inverse of our rule in action: when rates stabilize or fall, cap rates stop widening and prices firm up.
| Annual NOI | Value at 5.0% cap | Value at 5.5% cap | Value at 6.0% cap |
|---|---|---|---|
| $40,000 | $800,000 | ~$727,000 | ~$667,000 |
| $60,000 | $1,200,000 | ~$1,091,000 | $1,000,000 |
| $78,000 | $1,560,000 | ~$1,418,000 | $1,300,000 |
Illustrative only (value = NOI ÷ cap rate). Calculation structure and $78,000 example based on Collège MREX. Median plex price: APCIQ.
How leverage amplifies the impact of rates on your plex
Leverage means buying a property partly financed by a mortgage. When rates are low, debt service is small and leaves the buyer more cash flow, so they can pay more. When rates rise, debt service eats into cash flow, the buyer must offer less, and prices fall. Leverage therefore amplifies price sensitivity to rates.
Almost no buyer pays cash for a multi-unit building. They finance most of it with a mortgage, and it is the cash flow after debt service — not just the NOI — that determines what they are willing to pay. That debt service depends directly on the mortgage rate, which is itself tied to the Bank of Canada's policy rate.
When rates are low, a larger share of NOI stays in the buyer's pocket after the mortgage payment: they can therefore offer a higher price (tighter cap rate) while still hitting their target return. When rates rise, the same building leaves thinner cash flow; to preserve the return on their down payment, the buyer must lower their offer. Leverage thus acts as an amplifier: it pushes prices higher in low-rate periods and lower in high-rate periods, more than the cap rate alone would.
Watch the lenders' ratios
In high-rate periods, lenders also tighten the required debt-coverage ratio (DCR): the same building "supports" less debt, which reduces the amount a buyer can borrow and, in turn, the price they can offer. A well-documented NOI then becomes decisive in preserving your plex's value.
What this changes for the timing of your North Shore plex sale
A low or falling-rate environment compresses cap rates and supports prices — more favourable for sellers. A high or rising-rate environment widens cap rates and weighs on values. The best moment to sell is when the achievable price and your personal situation align, not necessarily the theoretical peak.
For an owner of a plex on the North Shore, the lesson is direct: the rate context is an integral part of the value you will obtain. Selling in a window of stable or falling rates — like the 2026 context flagged by APCIQ — generally means tighter cap rates and more generous offers than during a full rate climb.
That doesn't mean waiting indefinitely for the "peak": no one knows it in advance, and future rates are uncertain. The right instinct is to compare the price achievable today against your goals (retirement, reallocation, simplification), rather than speculating on the Bank of Canada's next move. To situate your building in the local market, our analysis of the North Shore multi-unit market in 2026 provides useful context.
"A plex's price and its cap rate are inversely correlated: if the price falls, the cap rate rises, and vice versa."
— Collège MREX, on the value of multi-residential buildingsHow to protect your plex's value when rates rise
Since value = NOI ÷ cap rate, increasing NOI partly offsets a higher cap rate. Apply the rent increases permitted by the Tribunal administratif du logement, add ancillary income, reduce operating expenses, and rigorously document financials: a higher, well-demonstrated NOI supports value even when cap rates widen.
You have no control over the policy rate, but you do over your NOI — the other lever in the formula. Every additional dollar of NOI is worth, at a 5% cap rate, about $20 of building value. Here are the concrete levers for a multi-unit owner:
- Optimize rents: rigorously apply the increases permitted by the Tribunal administratif du logement to bring rents closer to market;
- Develop ancillary income: parking, laundry, storage — every recurring source lifts NOI;
- Control operating expenses: renegotiate insurance, cut energy consumption, streamline maintenance;
- Document and normalize: clean financials and a normalized NOI reassure the buyer and their lender, which tightens the cap rate they apply to your building.
A plex with an optimized, well-demonstrated NOI holds up far better in high-rate periods than a building with below-market rents and murky finances. And if you'd rather avoid market uncertainty, a direct sale lets you lock in a price now, without waiting for the next rate move. See also: Multiplex yield calculation — cap rate, GRM and NOI explained and Unprofitable plex in Québec 2026 — when does it make sense to sell?.
Informational content only. Interest rates, cap rates, and market data are subject to change. Figures are illustrative; consult a chartered appraiser, mortgage broker, or accountant for advice specific to your property and situation.
