When your renewal notice arrives, three numbers compete for your attention: the rate on the 1-year term, the rate on the 3-year term, the rate on the 5-year term. The 5-year is usually lowest. Most people pick it.
That reasoning is incomplete. A lower rate is only part of the story. What you’re actually comparing is total interest cost over a common time horizon — and that calculation depends not just on the rate you take, but on what rates will be when you renew again. Choosing a term based on today’s rate without accounting for renewal risk is like pricing a flight based on the departure fare while ignoring the layover costs.
Here’s the framework that actually answers the question.
What term length is buying you
A mortgage term is a contract: you lock in a rate for a fixed period, and the lender can’t change it. In exchange, you can’t exit without a penalty.
Shorter terms offer flexibility. You’re exposed to the rate market more frequently — which works in your favour if rates fall, and against you if they rise. Longer terms offer certainty. You know your payment for five years, and the lender absorbs the rate risk.
Neither is inherently better. The right choice depends on the rate spread between terms, the direction rates are likely to move, and how much you’d pay in penalties if life disrupts your plan mid-term.
Why term selection is different in 2026
In a normal yield curve, longer terms cost more. Lenders charge a premium for locking in rates over longer periods because they’re absorbing more interest rate risk on your behalf. “Lock in short to save money” and “lock in long for certainty at a premium” are both reasonable rules of thumb in that environment.
Canada’s rate environment over 2024–2026 has not been normal. With the Bank of Canada cutting aggressively from 2023 highs, the yield curve flattened significantly. In periods of 2024 and into 2025, 1 and 2-year fixed rates were higher than 3 and 5-year rates at many lenders — an inverted spread.
When a 5-year term is priced only marginally above a 3-year term — or below it — the old heuristics stop working. Locking in longer costs almost nothing extra in premium, but delivers five years of certainty. That’s a different trade-off than paying 0.75% more for the privilege of a 5-year lock.
The implication: don’t apply general rules in a flat or inverted environment. Run the numbers for the specific spread you’re looking at.
The right way to compare terms: total cost over a common horizon
Because terms have different lengths, you can’t compare a 3-year and a 5-year fairly by rate or by per-term interest alone. You need to project both over the same 5-year window.
5-year: Fully known. Rate is fixed. Total interest is calculable from balance, rate, and remaining amortization.
3-year: Known for years 1–3. For years 4–5, you’ll renew at whatever the market offers. You need to estimate a renewal rate — or calculate the breakeven renewal rate.
1-year: Known for year 1 only. Years 2–5 are all market exposure.
The key question becomes: at what renewal rate does the shorter term produce the same total cost as the longer term? That number is the breakeven renewal rate — the exact threshold where both options tie. Above it, longer wins. Below it, shorter wins.
This is a much more tractable question than “will rates go up or down?”
If you are also considering a lump-sum payment before renewal, model that as a separate balance scenario. A prepayment can change the total interest and end-balance comparison across term lengths, but it also uses cash that may be needed elsewhere. Read Should You Make Extra Mortgage Payments Before Renewal? for the prepayment decision framework.
Worked example: $520,000 mortgage, 23 years remaining
The following uses Canadian semi-annual compounding as required by the Interest Act — equivalent monthly rate derived as i = (1 + r/2)^(1/6) - 1 — with illustrative rates reflecting the 2026 rate environment:
| 1-Year at 4.74% | 3-Year at 4.54% | 5-Year at 4.34% | |
|---|---|---|---|
| Monthly payment | $3,084 | $3,026 | $2,970 |
| Total paid this term | $37,005 | $108,937 | $178,203 |
| Interest this term | $24,523 | $67,509 | $104,282 |
| Principal paid | $12,482 | $41,428 | $73,921 |
| Balance at end of term | $507,518 | $478,572 | $446,079 |
The breakeven comparison — 3-year vs 5-year:
After the 3-year term, the remaining balance is $478,572, with 20 years of amortization left. To match the 5-year option’s total interest of $104,282, the 2-year renewal rate applied to that balance needs to produce exactly $36,773 in interest.
Working through the math: that breakeven renewal rate is 4.00%.
If 2-year fixed rates after your 3-year term are above 4.00%, the 5-year option at 4.34% would have cost less in total interest over the full five-year window. If they’re below 4.00%, the 3-year wins.
Put differently: choosing the 3-year term is a bet that rates drop at least 0.54% from where they are today by the time you renew. Whether that’s a reasonable bet depends on where the Bank of Canada is in its rate cycle — but now you’re reasoning about the degree of move required, not just the direction.
Renewal risk: the hidden cost of short terms
Every renewal event is a rate market exposure. A 1-year term means four more renewal conversations over a 5-year window. A 3-year means one. A 5-year means none.
In a falling-rate environment, frequent renewals work in your favour. But there are real costs to renewal events beyond the rate:
- Switching friction: Discharge fees, legal costs, and appraisal costs add up across multiple switches. These aren’t hypothetical — they reduce your effective rate savings.
- Qualification risk: The OSFI straight-switch exemption makes switching lenders straightforward today, but your financial situation could change between now and a future renewal. Shorter terms mean more events where that matters.
- Opportunity cost of time: Shopping a renewal properly takes several weeks of research and paperwork. Doing that once in five years versus four times is a real difference.
The longer your term, the fewer times you face these. For most homeowners, that reduction in renewal friction has genuine value — separate from the rate calculation.
The penalty angle
Choosing a longer term means accepting higher potential break cost if you need to exit early. Fixed-rate mortgages carry an IRD penalty — the greater of three months’ interest or the interest rate differential — which can reach five figures when rates drop significantly after you lock in.
Variable mortgages sidestep this entirely: the penalty is almost always three months’ interest. But within fixed terms, the asymmetry matters: a 5-year term at 4.34% carries more IRD exposure than a 3-year term, because there are more remaining months over which any rate differential is applied.
If there’s any meaningful probability you’ll sell, port, or refinance during the term, the shorter term’s lower penalty exposure is real money. The fixed vs variable discussion covers this asymmetry in more detail.
Factors that favour shorter terms
- The rate environment is clearly falling and Bank of Canada signals support further cuts
- A life event is likely within 2–3 years: relocation, growing family, downsizing
- The breakeven analysis supports it — the implied renewal rate is plausible
- You have financial flexibility to absorb payment changes at renewal
- IRD penalty risk is a genuine concern for your specific situation
Factors that favour longer terms
- Payment certainty is the priority — tight cash flow can’t absorb a payment shock at renewal
- The yield curve is flat or inverted — locking in longer costs little extra
- Life is stable — low probability of needing to break the mortgage
- The breakeven renewal rate is uncertain or unlikely to be achieved
- Short remaining amortization (under 10 years) — less time for short-term advantages to accumulate
Situation guide
| Situation | Term bias |
|---|---|
| Rates expected to fall significantly | Shorter |
| Need payment certainty | Longer |
| Likely to sell or move within 3 years | Shorter (lower penalty exposure) |
| Tight household budget | Longer |
| Flat or inverted yield curve | Longer becomes more attractive |
| Strong income, flexible cash flow | Shorter is manageable |
| Want certainty with minimal premium | Longer when spread is narrow |
Frequently asked questions
Is a 5-year mortgage term always the cheapest in Canada?
No. In a normal upward-sloping yield curve, 5-year rates are lower because lenders price them to reward long commitments. But in a flat or inverted curve — which Canada experienced through much of 2024–2026 — the spread narrows or reverses. The relevant comparison is always total interest cost over a common horizon, not just the stated rate.
What is the most popular mortgage term in Canada?
Historically, the 5-year fixed term has represented roughly 60% of renewals. Its popularity isn’t always justified by the math — it partly reflects inertia and a genuine preference for payment certainty. In recent years, as shorter terms occasionally offered comparable or better economics, that split has shifted.
Should I take a 1-year mortgage term if rates are expected to fall?
Only if the breakeven analysis supports it. Calculate the implied average renewal rate needed for the 1-year path to match the total cost of the 5-year option over five years. If that rate is achievable — and you believe rate forecasts support it — the 1-year has a case. If it requires rates to fall more than forecasts suggest, the math doesn’t support the bet even if the directional call is right.
How do I compare mortgage terms properly at renewal?
Project both options over the longer term’s full horizon. For a 3-year vs 5-year comparison: calculate total interest for the 5-year option. Then calculate total interest for the 3-year option at a range of assumed renewal rates for years 4–5. The renewal rate at which both produce equal total interest is your breakeven. Reason about whether that rate is plausible — not just whether rates will go up or down.
The Term Analyzer in RenewalIQ compares 1, 2, 3, and 5-year terms side-by-side for your specific balance, rate, and remaining amortization — showing total interest, monthly payment, and balance at end of term for each option, so you can see the complete picture before you commit.