Commercial Mortgage Prepayment Penalties: IRD, Yield Maintenance & Defeasance Commercial Mortgage Prepayment Penalties: IRD, Yield Maintenance & Defeasance

If you’ve ever broken a residential mortgage, you know the sting. Three months’ interest or the interest rate differential — painful, sure, but you wrote the cheque and moved on.

Commercial mortgage prepayment penalties are a completely different animal.

On a $5M commercial mortgage with yield maintenance, breaking the loan with three years left can cost you $300,000 to $600,000. On a CMHC-insured commercial loan subject to defeasance, you can blow past $1M. I’ve seen investors accept a purchase offer, sign the agreement, and then discover mid-transaction that their exit penalty wiped out years of equity gains.

That’s not a mistake you make twice.

Understanding how these penalties are calculated — and how to negotiate better terms before you sign — can save you hundreds of thousands of dollars over your investing career. Let’s break it down.

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Why Commercial Prepayment Penalties Hit So Much Harder

Here in Canada, residential mortgage prepayment rules fall under the Interest Act. There are guardrails. Lenders follow a standard formula. Commercial mortgages? No equivalent protection exists. Lenders write their own rules, and those rules heavily favour the lender.

Here’s why. When a bank originates a 10-year commercial mortgage at 5.5%, they often sell that cash flow stream to institutional investors or match it against long-term deposit obligations. If you pay out early, the lender is stuck redeploying capital — likely at a lower rate than your mortgage was paying. The prepayment penalty exists to make them whole on that lost income.

This is also why the rate you negotiate at origination matters beyond your monthly payment. A lower contract rate means a smaller gap between your rate and today’s reinvestment rate — and a smaller penalty if you ever need to exit.

The 5 Types of Commercial Prepayment Penalties

1. Three-Month Interest

This is the borrower-friendliest option. You pay three months of interest on the outstanding balance, full stop. No rate comparison, no present value calculations, no surprises.

Example:

• Outstanding balance: $4,000,000
• Interest rate: 5.75%
• Penalty: $4,000,000 × 5.75% ÷ 12 × 3 = $57,500

Three-month interest shows up most often on shorter commercial terms (one to three years) from alternative lenders and credit unions. Don’t expect to see it on a 10-year institutional deal.

2. Interest Rate Differential (IRD)

IRD compensates the lender for the gap between what your mortgage pays and what they could earn reinvesting your prepayment today.

Formula: (Contract rate − Reinvestment rate) × Outstanding balance × Remaining years

Example — rates have dropped modestly:

• Outstanding balance: $4,000,000
• Contract rate: 5.75%
• Current reinvestment rate: 5.00%
• Remaining term: 3 years
• Penalty: (5.75% − 5.00%) × $4,000,000 × 3 = $90,000

Example — rates have dropped significantly:

• Same loan, but current rates have fallen to 4.25%
• Penalty: (5.75% − 4.25%) × $4,000,000 × 3 = $180,000

That’s the trap. If you locked in at peak rates and rates have since dropped, your IRD penalty balloons. Investors who signed commercial deals at 6%+ during the 2023-2024 rate peak and now want to refinance into a lower-rate environment are staring at six-figure penalties before they’ve even run the numbers on whether the refinance makes sense.

3. Yield Maintenance

Yield maintenance is IRD’s more expensive cousin. Where IRD uses a simple rate differential, yield maintenance calculates the present value of every remaining cash flow on your loan — then discounts those payments at the current Government of Canada bond yield for the equivalent remaining term.

The lender isn’t just compensated for the rate gap. They’re made whole on the full economic value of the loan.

How the calculation works:

1. List every remaining monthly payment under your loan
2. Discount each payment at the current GoC bond yield for the matching term
3. The penalty is the difference between your outstanding balance and the sum of those discounted payments

Example (simplified):

• Outstanding balance: $4,000,000 at 5.75%, 36 months remaining
• Current 3-year GoC bond yield: ~3.0%
• Estimated penalty: $260,000–$320,000

Yield maintenance is the standard for institutional lenders, Schedule I banks, and most commercial mortgages with five-year or longer terms. If your commitment letter says “yield maintenance,” budget for a large number if rates have moved since you signed.

4. Defeasance

Defeasance is in a league of its own — and it’s what applies to most CMHC-insured commercial mortgages that have been securitized.

With yield maintenance, you write a cheque. With defeasance, you buy a bond portfolio.

Here’s how it works: you purchase a basket of Canadian government bonds that will generate cash flows matching your remaining mortgage payment schedule, dollar for dollar, month for month. That bond portfolio gets assigned to the lender. They keep receiving their scheduled payments. The mortgage is considered “defeased” — economically replaced by the bonds.

Why does this exist? CMHC-insured mortgages are often pooled into National Housing Act Mortgage-Backed Securities (NHA MBS) and sold to institutional investors. Those investors bought a specific payment stream. Defeasance ensures they still get it, even after you’ve exited the mortgage.

What does defeasance cost?

• Outstanding balance: $8,000,000 CMHC-insured mortgage at 5.0%, 5 years remaining
• Current 5-year GoC bond yield: ~3.05%
• Defeasance cost estimate: $600,000–$900,000

On top of that, budget for:

• Legal fees: $10,000–$30,000
• Defeasance servicer fee: $2,000–$10,000
• Your own legal counsel

CMHC’s guidance is clear: defeasance is required to prepay NHA MBS-backed mortgages. For CMHC-insured loans that haven’t been securitized, yield maintenance typically applies instead.

5. Declining Balance (Prepayment Schedule)

Some lenders — mostly alternative lenders and credit unions — use a preset declining penalty schedule. The penalty percentage drops each year, so you always know exactly what it’ll cost to exit.

Common structures:

• 5-4-3-2-1: 5% of balance in year one, 4% in year two, down to 1% in year five
• 3-2-1: Drops from 3% to 1%
• Flat rate: 2–3% regardless of timing

Example (5-4-3-2-1, year three):

• Outstanding balance: $3,000,000
• Year 3 penalty: 3%
• Cost: $3,000,000 × 3% = $90,000

The big advantage here is predictability. You know your exit cost on day one. That makes it much easier to model sale and refinance scenarios without running present value calculations.

If you’re sitting on a commercial mortgage with yield maintenance or defeasance, don’t model your exit strategy without running the penalty numbers first — book a free strategy call with LendCity™ and we’ll get you a formal payoff quote so you know exactly what breaking costs before you decide.

If this approach is on your radar, our private mortgage investing guide walks through how LendCity™ structures these deals.

Penalty Type Comparison

What Most Investors Miss: Open Periods and Partial Prepayments

Your commercial mortgage probably isn’t 100% locked. Even institutional lenders typically build in some flexibility.

Annual partial prepayment privileges. Most commercial mortgages allow you to prepay 10–20% of the original principal each year without penalty. Use this. Reducing your balance before triggering a penalty reduces the penalty amount proportionally.

Open period at maturity. Commercial mortgages usually have a 60–90 day open window before renewal. This is your no-penalty exit. Time your sale or refinance to land inside this window and you pay nothing.

Mid-term open windows. Rare, but negotiable on larger deals. Some commercial mortgages include a structured open period — say, 60 days open in year three of a five-year term. If this matters to your business plan, ask for it at origination.

Port provisions. Some commercial lenders allow you to transfer your existing mortgage to a new property purchase, avoiding the prepayment penalty entirely. It’s more common in residential lending, but it does exist for certain commercial products. Worth asking about if you’re planning to sell one asset and buy another.

The best time to negotiate better prepayment terms is at origination, not when you’re trying to sell — schedule a free strategy session with us and we’ll help you structure flexibility into your commercial mortgage before you sign the commitment letter.

How to Protect Yourself Before You Sign

Negotiate prepayment flexibility at origination

The best time to fight for better penalty terms is before you sign the commitment letter — not when you’re trying to exit. On larger commercial deals, lenders will often agree to:

• Declining balance penalties instead of yield maintenance
• Shorter closed periods within a longer term (open in years four and five of a 10-year term, for example)
• Higher annual prepayment allowances — 20–25% instead of the standard 10–15%

You might pay 0.10–0.15% more in rate for this flexibility. Model it out. In many scenarios, that rate premium costs far less than the yield maintenance penalty you’d face if you need to exit early.

Match your term to your actual hold period

If there’s a real chance you’ll sell, refinance, or need to access equity before the term ends, choose a shorter term. A three-year term at 25 basis points higher than a five-year term can still be the cheaper option if you exit in year three.

Variable rate commercial mortgages are also worth considering. They typically carry simpler penalty structures — often just three months’ interest — at the cost of rate uncertainty.

Factor the penalty into every exit analysis

Before you decide to break a commercial mortgage to access equity or chase a lower rate, run the full break-even math. Calculate the penalty, calculate the benefit of the new rate or freed-up capital, and figure out how long it takes for the benefit to offset the cost. That timeline is typically two to five years. If your hold period supports it, breaking can still make sense — but you need to know the numbers going in.

For CMHC mortgages: consider assumption

CMHC-insured mortgages are assumable. A qualified buyer can take over your existing insured mortgage — same rate, same balance, same terms — when they purchase your property. The mortgage transfers without triggering defeasance.

If you’re selling a property with a low-rate CMHC mortgage, marketing the assumption option can attract buyers and save both of you significant money. The buyer gets a below-market rate. You avoid a six-figure defeasance cost. That’s a deal worth structuring.

How Penalties Should Change Your Decision-Making

Commercial investors who understand prepayment penalties think differently about their deals.

On sale timing: If your mortgage has two years remaining and a substantial yield maintenance penalty, selling mid-term could cost you $200,000+ in penalties that eat directly into your proceeds. Run the net sale numbers with and without the penalty. Sometimes waiting for the open period at maturity is worth more than accepting today’s offer.

On refinancing: Pulling equity through a refinance only makes sense if the penalty plus transaction costs are exceeded by what you earn deploying that capital. This requires real modelling — not back-of-napkin math.

On development exits: Developers who sell on completion need to account for defeasance or yield maintenance on their construction takeout mortgages. This cost belongs in your pro forma before you break ground, not after you’ve accepted a purchase offer.

For a full breakdown of commercial mortgage options in Canada, including how to structure financing to reduce lifecycle costs, work with a commercial mortgage broker who has direct experience with institutional lending.

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