Below-Market Rents: The Real Impact on Refinancing and Reselling Your Building

Short answer: an income property is valued on its net operating income (NOI), not on the rents the market would bear. When your rents are below market, your NOI is artificially low — and since value ≈ NOI ÷ capitalization rate (cap rate), the building is undervalued. The bank then refinances a percentage of that reduced value, and the appraiser uses your actual rents, not the potential. The result: less value at resale and less capital available on refinancing. The good news: this gap can be closed, and it can be closed legally.

Why a below-market rent costs you twice

A below-market rent loses you money through two distinct channels, and it's the second one most landlords overlook. The first is obvious: the monthly income that isn't coming in. The second is structural: that gap lowers the capitalized value of the building, so both the price a buyer will pay and the amount a lender will agree to refinance.

The reason lies in the very nature of an income property. Unlike a home, it doesn't sell on its appearance, but as a machine for producing net income. Its value is a multiple of that net income. When the net income is squeezed by frozen rents, so is the value — and everything calculated from the value (sale price, borrowing capacity, mobilizable equity) shrinks with it. Below-market rent is not neutral: it works against you, silently, every month.

The mechanics: from missing rent to lost value

The standard method for valuing an income property is income capitalization. It comes down to one equation:

Dividing by the cap rate is the same as multiplying by its inverse. At a 5% cap rate, the multiplier is 20; at 4%, it's 25. In other words, every additional dollar of annual NOI creates $20 to $25 of value. The reverse is just as true: every dollar of missing NOI subtracts $20 to $25 of value. It's this lever that turns a modest monthly rent gap into a five- or six-figure loss of value.

In the field, you also hear about the gross rent multiplier (GRM): value ≈ annual gross income × GRM. It's a quick shortcut, but rough, because it ignores the expense structure. Serious lenders and appraisers settle the matter with the NOI and the cap rate. For the full detail of these calculations, see our guide: below-market rent and building value.

Worked example: 3 units at $400 below market

Take a simple, common case: a triplex where each of the three rents is $400 below market. Nothing extravagant; it's the typical gap for leases left frozen for a few years. Let's follow the money, from the missing rent all the way to the lost refinancing.

Reread those numbers. A gap of $400 per unit — the price of a monthly grocery bill — translates, once capitalized, into nearly $288,000 of value that doesn't yet exist on paper, and $216,000 of cash the bank can't advance you. This isn't theory: it's the exact arithmetic the appraiser mandated by your lender will follow.

How the bank calculates your refinancing (and why below-market rent caps the loan)

Refinancing a rental building rests on two safeguards, and below-market rents hit both at once.

• The loan-to-value ratio (LTV). A lender will generally advance up to about 75% of the appraised value. Since that value is based on the NOI, a squeezed NOI directly lowers the loan ceiling. Less value means less loan, dollar for dollar, at the cap-rate multiple.
• The debt service coverage ratio (DSCR). The bank also checks that net income comfortably covers the payments — often a DSCR of at least 1.10 to 1.25. A below-market rent lowers the NOI, so the DSCR, which can cap the loan below even 75% of the value.

Below-market rent therefore acts as a double brake: it reduces the value that serves as the basis for the loan, and it weakens the coverage ratio that authorizes that loan. Conversely, bringing rents up to market loosens both constraints at the same time: value climbs, the NOI covers the debt better, and the refinanceable amount jumps. That's the virtuous loop: optimized rents ↑ NOI ↑ value ↑ refinancing capacity.

The appraiser uses your actual rents, not the potential

Here's the most misunderstood point, and the most decisive: the bank appraiser capitalizes the rents actually collected, written into the leases, and not the rent you could theoretically ask. "Potential" doesn't figure in the calculation that determines your loan or your sale price.

The consequence is brutally simple: identifying the gap earns you nothing; closing it earns you everything. Until an increase is actually collected and documented by an up-to-date lease, it exists neither for the appraiser, nor for the lender, nor for the buyer. A building "with a potential of $43,000 in rents" but that collects $29,000 will be appraised and financed on $29,000. It's precisely this work — turning potential into real, documented rents — that is Opti Loyer's job.

Comparison table: the same triplex, below-market vs optimized

Here, side by side, is the same triplex before and after closing the $400-per-unit gap. The cap rate used is 5% (a ballpark, to be confirmed with comparables).

Optimization adds $288,000 of value and $216,000 of refinancing capacity — without expanding, without changing neighbourhoods, purely by bringing rents up to market. Notice that operating expenses, overwhelmingly fixed (taxes, insurance, snow removal), don't move: the rent increase reaches the NOI almost intact, which amplifies the effect on value.

How to maximize your income before a refinancing

The procedure is simple in principle: close the rent gap before having the building appraised, then refinance on the new value. In practice, it follows five steps.

1. Establish market rents. For each unit, what rent would you get by re-renting it today? Compare with real listings for similar units.
2. Quantify the gap and the value at stake. Total monthly gap × 12 ÷ cap rate = dormant equity. Multiply by 0.75 to estimate the additional refinancing.
3. Close the gap legally. Readjust rents through voluntary agreements (cash for raise) or vacate and re-rent at market the most undervalued units (cash for keys), in compliance with the TAL.
4. Update the documents. Signed leases, rent roll, clean operating financial statements: that's what the appraiser and the lender will examine.
5. Have it reappraised, then refinance. On the raised value, a loan at ~75% pays off the old balance and pays you the difference in cash.

The thing to watch: order matters. Refinancing before optimizing crystallizes the low value. Optimizing first means refinancing on the value created.

Preparing your building for a sale at the best price

The logic of resale is the same as refinancing, with a bonus. A savvy buyer pays a multiple of real net income: a building already at market rents spares them the risk and the work of repositioning. They'll buy it more readily, and often at a lower cap rate — that is, at a higher multiple, so for more.

Conversely, listing a below-market building on "the potential" means handing that upside to the buyer for free: they're the one who'll pocket the value created by raising the rents, not you. To sell at the best price, present up-to-date leases, a coherent rent roll and clear financial statements, and close the gap before going to market. You turn an unverifiable promise into demonstrated net income — the only language buyers and their lenders speak.

Doing it legally: the TAL and the Civil Code of Québec

One non-negotiable point: in Quebec, you don't readjust a rent with a snap of your fingers. Increases are governed by the Civil Code of Québec and by the Tribunal administratif du logement (TAL), and a sitting tenant has the right to refuse an abusive increase. Any optimization must go through voluntary agreements, never through coercion, harassment or a disguised eviction — practices that are illegal, costly and counterproductive.

This is precisely where the value of a professional approach shows. The two main legal levers:

• Cash for raise: the tenant accepts a readjusted rent in exchange for compensation (a spread-out discount, an improvement, a lump sum). A one-time cost for a recurring, capitalizable increase. See our guide on raising a tenant's rent in Quebec.
• Cash for keys: when the gap is too big, the tenant leaves voluntarily in exchange for compensation, and the unit is re-rented at market — a mutually agreed, respectful arrangement, with no forced eviction.

Carried out methodically and by the book, these agreements turn dormant equity into real value — refinanceable and sellable — without ever crossing the line. That's the whole Opti Loyer model: we're paid for results.

This article is provided for informational purposes and does not constitute financial, tax or legal advice. Rates, values and financing conditions vary — consult a professional for your situation.