Commercial mortgage underwriting is not a black box — it is a systematic process lenders use to answer one question: will this property generate enough cash flow to service the debt, withstand vacancies, and preserve equity for the lender? Understanding how underwriters think gives you a massive advantage when structuring your file. This guide breaks down the core metrics — LTV, DSCR, and amortization — plus the sponsor and market expectations that determine whether your deal gets a yes, a maybe, or a no across Alberta and British Columbia.
At Max Capital Financial, we underwrite files the same way lenders do before we ever submit them. That upfront discipline is why our commercial mortgages close faster and with fewer surprises. Whether you are buying your first multifamily building in Edmonton, refinancing a Calgary industrial bay, or building in Kelowna, this guide will help you understand what the underwriter sees when they open your file.
What is commercial underwriting?
Commercial underwriting is the process a lender uses to evaluate the risk of lending against a commercial property. Unlike residential underwriting, which focuses primarily on the borrower’s personal income and credit score, commercial underwriting focuses on the property first, the sponsor second, and the market third.
The underwriter’s job is to stress-test the deal. They want to know: if rents drop 10%, if the anchor tenant leaves, or if interest rates rise 200 basis points, does the property still cover the mortgage? If the answer is yes with room to spare, the deal moves forward. If the answer is marginal, the terms get adjusted — lower leverage, higher rate, shorter amortization, or additional security.
Loan-to-Value (LTV): the leverage ceiling
LTV is the simplest and most commonly misunderstood metric in commercial lending. It measures the loan amount as a percentage of the property’s appraised value (or purchase price, whichever is lower).
LTV = Loan Amount ÷ Appraised Value
In Western Canada, typical maximum LTVs by asset class look like this:
Stabilized multifamily (5+ units): up to 80% conventional; 85% – 95% with
CMHC MLI Select
Office, retail, industrial: 65% – 75%
Owner-occupied commercial: 75% – 80%
Hospitality, self-storage, special-purpose: 55% – 65%
Value-add or transitional assets: 60% – 70%
The key insight: LTV is a ceiling, not a target. A property may qualify for 75% LTV on paper, but if the DSCR is tight at that leverage, the lender will reduce the loan amount until the coverage ratio works. At Max Capital, we model both LTV and DSCR simultaneously so our clients know their real maximum proceeds before they make an offer.
Debt Service Coverage Ratio (DSCR): the real gatekeeper
If you only learn one metric, learn DSCR. It is the ratio of the property’s net operating income (NOI) to its annual debt service (mortgage payments). It tells the lender how many times the property’s cash flow covers the mortgage.
DSCR = Net Operating Income ÷ Annual Debt Service
Minimum DSCR requirements in Canada:
Practical example: a Calgary retail plaza with $400,000 NOI and $320,000 annual debt service has a DSCR of 1.25× — bankable at most conventional lenders. If the same plaza is in lease-up and NOI is only $300,000, the DSCR drops to 0.94×. No conventional lender will fund that deal as-is. Options include waiting for stabilization, reducing leverage, or bridging with private financing until the property qualifies for a take-out.
Pro tip: Underwriters typically use a “stabilized” NOI — not trailing 3-month performance during a lease-up. They may also haircut rent rolls by 5% – 10% to account for vacancy, collection loss, and turnover. Know your stabilized NOI before you model DSCR.
Amortization: how long until the loan is paid off
Amortization is the period over which the loan would fully repay if all scheduled payments are made. It is not the same as the term. A 5-year term with a 25-year amortization means your rate is fixed for 5 years, but payments are calculated as if the loan repays over 25 years. At maturity, a balloon balance remains and must be refinanced or paid off.
Typical commercial amortizations in Western Canada:
Multifamily (conventional): 25 – 30 years
Office, retail, industrial: 20 – 25 years
Properties 40+ years old: often capped at 20 years
Special-purpose assets: 15 – 20 years
Private commercial bridge: interest-only or 25 – 30 years
Longer amortization means lower payments, which improves DSCR and allows higher LTV on the same NOI. That is why CMHC MLI Select’s 50-year amortization is so powerful — it can turn a marginal deal into a clear approval by stretching payments over decades. On a $5 million loan at 5%, the difference between a 25-year and 50-year amortization is roughly $14,000 per month in payment savings — enough to swing DSCR from 1.15× to 1.30×.
Term vs. amortization: a critical distinction
The term is how long your interest rate is locked. The amortization is how long the loan would take to pay off fully. At the end of the term, you face a renewal, refinance, or payout. Most commercial borrowers in Alberta and BC run 3- to 5-year terms against 20- to 25-year amortizations, then refinance at maturity.
Your prepayment terms matter enormously here. Open prepayment lets you refinance anytime without penalty. Closed prepayment with a declining penalty (e.g., 3% year 1, 2% year 2, 1% year 3) gives the lender certainty but limits your flexibility. If you plan to renovate, lease-up, and refinance into CMHC within 18 months, an open prepayment or short term is worth a slightly higher rate.
Net Operating Income (NOI): the foundation of everything
NOI is the income left after operating expenses but before debt service, capital expenditures, and income taxes. It is the numerator in DSCR and the basis for cap-rate valuations.
NOI = Effective Gross Income − Operating Expenses
Underwriters scrutinize NOI carefully. They will:
Verify rent roll against leases and bank deposits
Apply market vacancy rates (often 5% – 8% in Alberta, 3% – 5% in BC)
Normalize expenses — removing one-time costs and owner-specific items
Add management fees even if the owner self-manages
Require replacement reserves on older properties
A common mistake is presenting “pro forma” NOI based on fully leased, market-rate rents without accounting for lease-up time, tenant improvement costs, or free-rent periods. Underwriters will haircut aggressive pro formas heavily — or reject them outright.
Cap rates and valuation: how lenders set the LTV denominator
Lenders order appraisals from AACI-designated appraisers who value the property using a combination of the income approach (cap rate on NOI) and the direct comparison approach (recent sales). The income approach usually dominates for commercial assets.
Value = NOI ÷ Cap Rate
Cap rates vary by market, asset class, and property quality. As of 2026, approximate ranges in Western Canada include:
Vancouver multifamily: 3.75% – 4.50%
Edmonton / Calgary multifamily: 4.50% – 5.25%
Calgary industrial: 5.00% – 5.75%
Edmonton retail (grocery-anchored): 5.25% – 6.00%
Secondary Alberta markets: 6.00% – 7.50%
Hospitality / special-purpose: 7.00% – 9.00%+
A lower cap rate means a higher valuation on the same NOI — which means higher LTV proceeds. But underwriters use conservative cap rates, often 25 – 50 bps higher than the market midpoint, to build in a safety margin. Do not count on your buyer’s pro forma cap rate matching the lender’s appraised value.
After the property checks out, the underwriter turns to the borrower. Conventional commercial lenders in Canada typically want:
Experienced sponsors with strong balance sheets get better rates, higher leverage, and more flexible terms. First-time commercial buyers or sponsors with thin liquidity can still get financed — but the structure changes. Options include vendor take-back mortgages, co-sponsorship with an experienced partner, or starting with private commercial financing and refinancing once the asset is stabilized.
Recourse, guarantees, and security
Most commercial mortgages in Canada are full recourse to the borrower and personal guarantors. That means the lender can pursue the borrower’s other assets if the property does not cover the loan. CMHC-insured multifamily and large institutional deals can sometimes be non-recourse or limited recourse, with carve-outs for fraud, environmental damage, and bankruptcy.
Underwriters also evaluate the quality of the collateral itself. Environmental Phase I assessments are standard; Phase II is required if contamination is suspected. Property condition reports identify deferred maintenance that could affect value. Title searches confirm clean ownership and flag easements, encroachments, or other title issues.
Western Canada market considerations
Underwriters price risk differently depending on the market:
Edmonton — strong multifamily and industrial demand; CMHC MLI Select is very active; lenders comfortable with newer builds
Calgary — recovering office market; industrial and multifamily are lender favourites; retail depends on tenancy quality
Vancouver — lowest cap rates, highest valuations; lenders demand stabilized assets in primary submarkets
Kelowna — multifamily and tourism-adjacent assets perform well; seasonal volatility requires stronger liquidity
Victoria — tight supply supports aggressive multifamily pricing; land constraints favour densification plays
Red Deer and other secondary markets — slightly lower leverage, but strong deals get funded with the right structure
Construction and bridge underwriting
Development and value-add deals require a different underwriting lens. Lenders underwrite the exit, not just the current cash flow. They want to see:
A detailed cost budget with 10% – 15% contingency
A realistic construction timeline with milestone-based draw schedules
Pre-leasing or pre-sales commitments (for multifamily or condo)
A credible take-out financing plan — often a
CMHC MLI Select commitment or conventional term sheet
Interest reserve to cover carry during construction
QS-certified progress draws
Our commercial construction financing page covers draw mechanics and lender holdbacks in detail. The key point: construction underwriting is forward-looking and scenario-based. The lender models multiple outcomes (on-time / delayed, on-budget / over-budget, leased / unleased) and sizes the loan against the worst reasonable case.
How Max Capital pre-underwrites your file
Before we submit to any lender, we run our own underwriting model. We stress-test your NOI, apply conservative cap rates, model DSCR at multiple leverage points, and validate sponsor liquidity against lender requirements. If the file is strong, we know exactly which lenders will compete for it. If the file has gaps, we identify them upfront and structure around them — sometimes with a different capital source, sometimes with a co-sponsor, sometimes with a phased financing plan.
That discipline saves our clients time, money, and frustration. No chasing lenders who will decline. No surprises at the appraisal stage. No last-minute scrambles for additional equity. Just clean files that close on schedule.
Ready to underwrite your deal?
Send us your property details and we’ll run the numbers the same way lenders do — within 48 hours.
