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How Do Commercial Mortgages Work?

by | December 11, 2025

… A Beginner’s Guide for Business Owners and Real Estate Investors

If you’ve ever looked at a strip plaza, an apartment building, or even a self-storage facility and thought, “I wonder how people afford to buy those?” — the answer is almost always the same: a commercial mortgage.

Now, commercial mortgages sound big, scary, and complicated to a lot of people, especially if you’ve only dealt with residential financing before. But truthfully? Once you understand how they work, you’ll realize it’s just another tool — one with a few extra moving parts and a little more paperwork.

Whether you’re a business owner dreaming of owning your own space, or an investor looking to level up your real estate game, knowing how these mortgages work is the first step to playing in the big leagues.

What I’m Going to Cover:

What Makes a Mortgage ‘Commercial’

How Commercial Mortgages Actually Work

What Lenders Look For in Commercial Deals

How Commercial Mortgages Differ From Residential Mortgages

Real-World Examples You Can Apply Today

What Makes a Mortgage ‘Commercial’

Simply put, a commercial mortgage is financing for property used to run a business or generate income — not a home where someone lives. The building could be retail, office, industrial, multi-family (5+ units), or even a mix. If the main goal is profit, you’re in commercial territory.

But it’s not just the building that matters. It’s also about the purpose. You could buy a six-plex rental building, a storefront with apartments above, or a warehouse for your own business. All of those would require a commercial mortgage because they’re tied to revenue, not your personal living situation.

How Commercial Mortgages Actually Work

A commercial mortgage works the same way as a home mortgage in theory: you borrow money, pledge the property as security, and repay it over time with interest. But the similarities kind of end there.

The Key Differences?

  • Lenders focus on the property’s income. They care about the rent it brings in, the leases in place, and whether it can comfortably cover the mortgage payments.
  • You’ll need a larger down payment. Usually 25% or more. Lenders want to see you’ve got skin in the game.
  • Rates are higher. Risk and complexity come at a price.
  • Terms are shorter. Think 5-10 years on the term, with a 20-25 year amortization.

Oh — and expect a longer approval process. Commercial lenders are thorough. They’ll look at environmental reports, appraisals, business plans, and detailed financials before saying yes.

What Lenders Look For in Commercial Deals

This is where people often get tripped up. With residential mortgages, lenders mostly want to know: “Can YOU afford this?”

With commercial? The question shifts to: “Can THIS PROPERTY support this loan?”

Here’s what they scrutinize:

  • Net Operating Income (NOI): Income minus expenses (excluding debt payments).
  • Debt Service Coverage Ratio (DSCR): Does the income more than cover the loan payments? A DSCR of 1.20+ is typical.
  • Lease Quality: Are your tenants reliable? Long-term? Paying market rent?
  • Location and Market Conditions: Is this property in demand, or in a dying plaza nobody wants?

Sure, your personal finances still matter — especially for smaller deals — but the strength of the property is front and center.

How Commercial Mortgages Differ From Residential Mortgages

Let’s lay it out plain:

Residential MortgageCommercial Mortgage
Based on your incomeBased on property income
5%-20% down payment25%-35% down payment
Lower interest ratesHigher interest rates
Up to 30-35 year amortizationTypically 20-25 year amortization
Simpler approval processIn-depth review and documentation
CMHC insurance availableCMHC rarely involved (except rentals)

The stakes are higher with commercial, but so are the potential returns. You’re building wealth through income-generating assets, not just through homeownership.

Real-World Examples You Can Apply Today

Example 1: Business Owner

Let’s say you’re running a successful HVAC company out of leased industrial space. You’re tired of paying someone else’s mortgage. You find a small industrial unit for sale. This isn’t just about securing space — it’s about building equity in your business’s future. You’ll need a commercial mortgage because this is tied to your company’s operations.

Example 2: Real Estate Investor

You’ve done well with a couple of duplexes and triplexes. Now you’re eyeing a 10-unit apartment building. Once you hit 5+ units, lenders move you into the commercial category. The building’s rent rolls, vacancy rates, and expenses will dictate how much you can borrow — not your personal income anymore.

Example 3: Entrepreneur

You’re opening a retail store and want to buy your own storefront. Lenders will assess your business viability, your lease (even to yourself), and the market strength. Again — commercial mortgage all day long.

Allen’s Final Thoughts

Here’s the golden nugget to walk away with: Commercial mortgages aren’t just about buildings — they’re about business. Whether it’s rental income or operational space, lenders want to know how this property is going to generate cash and hold its value.

Yes, the process is more involved. Yes, the rates and down payments are bigger. But with bigger risk comes bigger opportunity. Owning commercial real estate can build wealth in ways residential property can’t.

That’s why having someone in your corner who gets it makes all the difference.

How I Can Help

As your mortgage agent, I don’t just toss your file at a bank and hope for the best. I help you:

  • Understand the commercial lending landscape.
  • Position your deal in a way lenders respect and understand.
  • Navigate the paperwork without pulling your hair out.
  • Find the right lenders for your project — not just whoever’s cheapest.
  • Think big picture, so today’s financing supports tomorrow’s goals.

Whether you’re a business owner tired of renting or an investor ready to scale up, I’m here to help you map it out, structure it properly, and get it done right.

When you’re ready to talk commercial real estate, I’m just a conversation away. Let’s build something big together.

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Allen Ehlert

Allen Ehlert

Allen Ehlert is a licensed mortgage agent. He has four university degrees, including two Masters degrees, and specializes in real estate finance, development, and investing. Allen Ehlert has decades of independent consulting experience for companies and governments, including the Ontario Real Estate Association, Deloitte, City of Toronto, Enbridge, and the Ministry of Finance.

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