How the prime rate works — and who actually sets it
The prime rate is the base interest rate that Canadian financial institutions use to price variable-rate loans, including mortgages, lines of credit, and some business loans. Despite being called 'the' prime rate, each lender sets its own — but in practice, Canada's Big Six banks (RBC, TD, Scotiabank, BMO, CIBC, and National Bank) move their prime rates together and in lockstep with the Bank of Canada's overnight rate.
When the Bank of Canada changes its overnight rate by 0.25%, the prime rate moves by the same amount — typically within hours of the announcement. The gap between the overnight rate and the prime rate is not fixed. Historically, prime has been approximately 2.00% to 2.20% above the overnight rate. As of early 2026, with the overnight rate at 3.25%, major lender prime rates sit at approximately 5.45%.
The Bank of Canada sets the overnight rate eight times per year on pre-announced dates. Variable-rate borrowers should mark these dates on their calendar — they are the only scheduled events that can change their mortgage payment. Between announcements, the overnight rate does not change.
The prime rate is like the water level — it rises and falls with Bank of Canada decisions, and your variable-rate payment floats on top.
Variable-rate discounts — how prime minus 0.80% becomes your rate
No borrower pays the prime rate directly. Variable-rate mortgages are priced as prime minus a discount — for example, prime minus 0.90% — which produces your effective contract rate. If prime is 5.45% and your discount is 0.90%, your mortgage rate is 4.55%. This rate adjusts up or down when prime changes, but your discount stays fixed for the term.
The size of your discount depends on the same factors that affect fixed rates: insured vs uninsured status, credit score, debt ratios, property type, and lender appetite. An insured mortgage with strong credit might secure prime minus 1.20% (4.25% effective rate at current prime). An uninsured rental property might only get prime minus 0.30% (5.15% effective). The 0.90% spread between these scenarios is the risk premium.
Shopping for a variable rate means shopping for the discount — not the headline rate. A lender offering prime minus 1.00% is meaningfully better than one offering prime minus 0.70%, regardless of what prime happens to be today. Over five years, a 0.30% larger discount saves approximately $4,500 in interest on a $500,000 mortgage.
- Insured (<20% down): typically prime minus 0.90% to 1.20%
- Insurable (20%+ down): typically prime minus 0.60% to 0.90%
- Uninsurable (rental, >$1M): typically prime minus 0.30% to 0.60%
- Your discount stays fixed for the term — only prime moves
Adjustable-rate vs variable-rate with fixed payments — the critical distinction
There are two types of variable-rate mortgages in Canada, and they behave very differently when rates change. An adjustable-rate mortgage (ARM) changes your payment amount every time the prime rate changes — if prime rises by 0.25%, your monthly payment increases immediately to maintain the same amortization schedule.
A variable-rate mortgage with fixed payments keeps your payment the same when prime changes. Instead of paying more, more of your payment goes to interest and less to principal — which extends your amortization. If rates rise far enough, you can hit the trigger rate (see next section), where your payment no longer covers even the interest.
Most Canadian variable-rate mortgages are the adjustable-rate type that changes payments with prime. But some lenders offer the fixed-payment variant, particularly credit unions and monoline lenders. Before signing, confirm which type you are getting — the risk profiles are very different. A fixed-payment variable mortgage in a rising rate environment can silently extend your amortization to 40, 50, or even 70 years without you noticing until the trigger rate alert arrives.
Variable-rate mortgages follow the economic cycle — the key is understanding which type you hold and how it responds when the water rises.
Trigger rate explained — when your payment stops covering interest
A trigger rate is the mortgage rate at which your monthly payment covers only the interest — with zero dollars going to principal. When the Bank of Canada raises rates enough that your variable rate crosses this threshold, your lender will contact you with options: increase your payment, make a lump-sum payment to reduce the balance, convert to a fixed-rate mortgage, or extend your amortization.
Trigger rates became a national conversation in 2022-2023 when the Bank of Canada raised rates rapidly. Many borrowers who took variable-rate mortgages with fixed payments at 1.50% in 2021 discovered their trigger rate was around 4.00% — and watched rates blow past it. Their amortizations silently extended to 60+ years, and lenders sent trigger rate notices requiring action.
You can calculate your own trigger rate: divide your monthly payment by your outstanding mortgage balance, multiply by 12, and multiply by 100. If your payment is $2,500 and your balance is $500,000, your trigger rate is ($2,500 × 12 / $500,000) × 100 = 6.00%. When your variable rate reaches 6.00%, your payment covers only interest.
- Trigger rate = (monthly payment × 12 / mortgage balance) × 100
- Example: $2,500 payment, $500K balance → trigger at 6.00%
- When triggered: lender requires payment increase, lump sum, or conversion to fixed
- Adjustable-rate mortgages generally do not have trigger rates — payments adjust automatically
- Fixed-payment variable mortgages are the ones at risk of hitting trigger rates
Planning for rate changes — how to stress-proof your variable mortgage
Variable-rate mortgages have historically outperformed fixed rates over full five-year terms approximately 70% of the time in Canada. But that 70% statistic includes periods of falling and stable rates. The risk of variable is concentrated in rising-rate environments — like 2022-2023, when the Bank of Canada raised rates by 4.75% in 18 months.
The most resilient approach to a variable-rate mortgage is to stress-test your budget at a rate 2% to 3% above your starting rate. If your variable rate starts at 4.55% (prime minus 0.90%), model your budget at 6.55% to 7.55%. If the numbers still work — or you have the savings to bridge the gap — variable may make sense for you. If a 2% increase would cause financial strain, consider a fixed rate or a smaller mortgage.
Some borrowers use a split approach: put a portion of the mortgage in fixed for certainty and a portion in variable to capture potential rate decreases. This is not available from all lenders but can be an effective hedge when you are uncertain about the rate path.
The variable-rate advantage is real over full cycles — but requires the financial buffer to ride through the rising-rate periods without stress.
Canadian prime rate history — what the last 25 years tells us
Understanding prime rate history helps set realistic expectations. Over the last 25 years (2000-2025), the Canadian prime rate has ranged from a low of 2.25% (during the 2009 financial crisis and briefly in 2020) to a high of 7.20% (in 2000 and again in 2007). The average over this period is approximately 4.6%.
The prime rate spent most of the 2010s in a historically low range of 2.70% to 3.20%, reflecting the post-financial-crisis environment of low inflation and accommodative monetary policy. The 2022-2023 hiking cycle brought prime from 2.45% to 7.20% in roughly 18 months — the fastest tightening cycle since the early 1980s.
Variable-rate borrowers in early 2026 are in a different position than those in 2021. With prime at 5.45%, future rate moves are more likely to be cuts than hikes — though the timing and magnitude are uncertain. The Bank of Canada's own forecasts and market pricing suggest gradual easing through 2026-2027, which would reduce variable-rate payments over time.
Frequently asked questions
What is the current prime rate in Canada for 2026?
As of early 2026, the prime rate at most major Canadian lenders is approximately 5.45%, reflecting the Bank of Canada overnight rate of 3.25% plus a 2.20% spread. Each lender sets its own prime rate, but the Big Six banks and most other lenders move in lockstep. Prime changes only after Bank of Canada rate announcements — eight scheduled dates per year.
What is the difference between an adjustable-rate and a variable-rate mortgage?
An adjustable-rate mortgage (ARM) changes your monthly payment amount every time the prime rate changes — payments go up when rates rise and down when rates fall. A variable-rate mortgage with fixed payments keeps your monthly payment the same when prime changes, but the portion going to principal vs interest shifts — which can silently extend your amortization. ARMs are more common in Canada. The fixed-payment variant carries trigger rate risk.
What is a trigger rate and how do I know if I'm close?
A trigger rate is the rate at which your mortgage payment covers only the interest with nothing going to principal. Calculate yours: (monthly payment ÷ mortgage balance) × 12 × 100. On a $500,000 balance with a $2,500 monthly payment, your trigger rate is 6.00%. If your variable rate reaches this level, your lender will require you to increase payments, make a lump sum, or convert to fixed.
Why do insured mortgages get better variable-rate discounts?
Insured mortgages carry CMHC, Sagen, or Canada Guaranty insurance that protects the lender against default. Because the lender faces virtually no credit risk, they can offer a larger discount off prime — typically 0.90% to 1.20% below prime. The borrower pays for the insurance premium (added to the mortgage), but the larger discount on the rate over five years can offset a significant portion of that premium cost.
Should I choose a variable rate or fixed rate right now?
The decision depends on the current fixed-variable spread and your financial buffer. If the spread between 5-year fixed and variable is less than 0.50%, fixed may be more attractive because you are paying relatively little for payment certainty. If the spread is 0.75% or more, variable offers meaningful upfront savings — but you must be able to handle potential payment increases. Model your budget at variable rate + 2% before deciding.
How often can the prime rate change?
The prime rate can change only after the Bank of Canada changes the overnight rate, which happens on eight pre-announced dates per year. Between these fixed dates, the overnight rate — and therefore prime — does not change. In extraordinary circumstances (like March 2020), the Bank can make an unscheduled rate decision, but this is rare — it has happened only a handful of times in the last 25 years.
Does the stress test apply differently to variable-rate mortgages?
The stress test applies the same formula to variable-rate mortgages: you must qualify at the greater of 5.25% or your contract rate plus 2%. For variable-rate borrowers, the qualifying rate is typically 5.25% (since most variable rates are below 3.25%, making 5.25% the floor). This is the same qualifying rate used for fixed-rate mortgages — the stress test does not distinguish between fixed and variable for qualification purposes.
Turn this guide into a mortgage plan
Calculate your trigger rate, compare fixed vs variable scenarios, or book a consult with a Pragmatic Mortgage broker.
