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You're Not Saving Money on a 3-Year Mortgage, You're Buying Early Renewal Risk
By Erin Fraser profile image Erin Fraser
3 min read

You're Not Saving Money on a 3-Year Mortgage, You're Buying Early Renewal Risk

When Government of Canada bond yields flatten, as they have recently, the price difference between a 3-year and 5-year fixed mortgage shrinks to almost nothing. Most borrowers walking into a rate-shopping conversation see the shorter term as the cautious play. They're reading it backwards.

The Spread Collapse Nobody's Naming

When Government of Canada bond yields flatten, which they have, the price difference between a 3-year and 5-year fixed mortgage shrinks to nothing. In a normal yield curve environment, you'd expect to pay meaningfully less for the shorter commitment. Right now, depending on whether your mortgage is insured or uninsured, the spread has compressed significantly. On a $500,000 mortgage, that's roughly $50 a month. Over three years, you'll "save" about $1,800 in exchange for forcing yourself back to the negotiation table two years earlier than you otherwise would.

The math only works if rates available in September 2029 are materially lower than what's on offer today. If they aren't, if inflation stays sticky in services and housing the way it has been, if the Bank of Canada holds or cuts less aggressively than the market currently expects, you've paid $1,800 for the privilege of qualifying all over again at whatever the market looks like then.

That's buying a countdown timer on your own re-qualification risk.

The Breakeven Nobody Runs

To justify a 3-year term priced meaningfully below the 5-year, the rate you can lock at renewal in 2029 needs to be low enough to offset two things: the interest you'll pay on those final two years at the higher rate, and the transaction cost of renewing early. Lenders charge legal fees. Your credit profile could shift. Your income might not.

OSFI's stress test, contract rate plus 2%, or 5.25%, whichever is higher, doesn't care what term you picked three years ago. If your debt-to-income ratio has deteriorated because you financed a car or took a leave or your partner left the workforce, the 3-year term just became a trap. The 5-year term would have carried you through.

Run the actual scenario: if the best rate available at your 3-year renewal is materially higher than today's 5-year rate, you've locked a higher rate for years four and five. You lost. The "discount" you thought you were getting in years one through three evaporated because the term forced you to reset too early.

When the Short Term Actually Wins

The shorter term has one real advantage, and it's not the rate. It's the Interest Rate Differential penalty. If you need to break a 5-year fixed in year three to sell or refinance and rates have dropped, the IRD calculation can cost tens of thousands. A 3-year term simply expires. No penalty, no math, just done.

That makes the 3-year the right call if you're planning to move, if your household is unstable, if you expect a liquidity event that will let you pay the mortgage off early. You're buying insurance against a locked contract that punishes you for leaving early. You're not buying a bet on where rates will go in 36 months. The spread compression has already removed the discount you'd need to make that bet pay.

What You're Actually Buying

A variable-rate mortgage at least moves with every Bank of Canada cut. If you genuinely believe rates are heading down and you want to capture that, the variable gives you the thing you're betting on. The compressed 3-year fixed gives you a rigid contract that expires in 36 months and hands you whatever the market looks like on that specific day.

The churn is real. A significant block of Canadian mortgages taken out back in 2020 and 2021 at sub-2% rates renewed in 2023 and 2024. The combination of payment shock and herd behavior has pushed demand toward mid-length terms as a psychological compromise. Lenders know this. The pricing reflects it. They're not offering you flexibility. They're offering you the obligation to come back sooner.

If the 5-year were priced at a 50-basis-point premium over the 3-year, the conversation would be different. At current spread levels, you're not buying a discount. You're buying exposure.


Sources

  1. WOWA.ca - Vancouver Housing Market - 2024-11-21. https://wowa.ca/vancouver-housing-market
  2. WealthNorth - Mortgage Rate History. https://wealthnorth.ca/mortgages/rates/mortgage-rate-history/
  3. Calgary.com - What is a Mortgage Interest Rate Differential Penalty? - 2025-06-26. https://www.calgary.com/blog/what-is-a-mortgage-interest-rate-differential-penatly/