Worked example · Verified 2026-09-12

Payment shock on a $1,100,000 Ontario renewal from 3.49%

Seven-figure remaining balances with a full clock still attached are the late-cycle originations: households who bought or refinanced after prices had already reset, at a three-handle coupon that felt normal at the time. They have not had years of cheap-money principal reduction. They are meeting a higher quote with almost the entire loan still outstanding. Ontario property tax on the underlying home is already a large carrying line. This page keeps monthly frequency and a twenty-five-year remaining amortization so the shock is the coupon only.

The jumbo remaining file pins 3.49% leaving and 4.79% arriving. Jumbo street quotes can sit wide of the mid-market pin; use the live calculator before you brief a lender. Live rates hub.

Open this example in the live calculator

Computed result

Remaining balance$1,100,000
Remaining amortization25 years
Outgoing quoted rate3.49%
Outgoing payment$5,486.17Monthly
Pinned renewal rate4.79%
Renewed payment$6,266.79
Payment shock+$780.62per monthly period
First renewed payment — interest$4,347.65
Interest if this rate holds for the remaining amortization$780,038
ProvinceOntario

Full clock still left on a jumbo remaining balance

Twenty-five years remaining on a renewal means this loan is almost new — a recent purchase, a refinance, or a previous reset that restored the clock. The engine therefore looks like a purchase calculator with no down payment field. The difference is legal, not mathematical: stay-put is still untested, and an uninsured straight switch is still exempt. At this remaining balance the file is conventional almost by definition; insurance does not exist above the price cap and is unlikely on a seven-figure remaining loan anyway. Jumbo overlays, second-level approval, and sometimes a lower maximum loan-to-value at the new lender are the real switch frictions, not the formula.

  1. 01 · Outgoing vs incoming

    $1,100,000 at 3.49% → $5,486.17. Same balance, 25 years left, 4.79% → $6,266.79. Shock +$780.62.

  2. 02 · First renewed period

    $4,347.65 interest, $1,919.14 principal. Frequency stays monthly.

What this band means

Outgoing $5,486.17 at 3.49% becomes $6,266.79 at 4.79%. Shock +$780.62 is a second-car payment, and it arrives on a file that has not had time to get smaller. The first renewed month is $4,347.65 interest and $1,919.14 principal — almost a new loan’s split, because it almost is a new loan. Uninsured straight-switch exemption still applies if the terms stay clean, but jumbo desks at the destination lender may ask for more documentation than a mid-market switch. That is operational friction, not a return of the prescribed qualifying rate. Using this event to pull equity in the Greater Toronto area is how a clean switch becomes a refinance at the worst possible remaining balance. The one-hundred-eighty-day window is where you find out whether 4.79% is even the right pin. This page will not chase the sheet.

A recent purchase or a refinance that restored the clock, so almost none of the loan has been retired. Jumbo desks ask for more paper even on a clean straight switch. Second-level credit committee approval and an internal loan-to-value overlay are operational friction, not the prescribed qualifying rate returning. Pulling equity at this remaining balance is how a clean switch becomes a refinance at the worst possible size. Fresh-advance vintage, an almost-untouched principal, a jumbo credit overlay, a deal-desk memo, and a syndication review are the texture of this remaining balance.

Sensitivity

A point on this principal is a four-figure monthly move. Shortening remaining amortization would raise the debit further; stretching it is not available as a true renewal because the clock is already twenty-five years — any further stretch is a product exception and a refinance. The rest of this hub is smaller remaining balances; do not average them.

ChangeResultVersus this page
Renewal rate 5.79%$6,901.15+$634.36 vs this renewal
Renewal rate 3.79%$5,661.68−$605.11 vs this renewal
20-year remaining amortization$7,104.19+$837.40 vs this renewal

Questions that only this band answers

Why does this $1.1 million Ontario renewal still have twenty-five years left?▾
The remaining amortization is an input, not a mystery. A recent purchase or a refinance that restored the clock leaves 25 years. The engine re-prices $1,100,000 over that full clock at 4.79%. It does not invent extra years beyond twenty-five.
Will a jumbo lender stress-test this $1.1 million Ontario switch?▾
A qualifying uninsured straight switch is exempt from the prescribed qualifying rate. Jumbo overlays can still add documentation, appraisal, and internal loan-to-value limits. Those are lender credit policies. They are not OSFI’s prescribed rate returning through the back door. Changing the remaining balance or the clock would be a refinance and would be tested.
Is default insurance available on this $1.1 million remaining Ontario balance?▾
Unlikely, and not modeled here. Insurance is a purchase-time product below the $1,500,000 cap. A remaining balance of $1,100,000 on a renewal is re-priced as a conventional loan. No premium is added at renewal on this page.

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Last verified: 2026-09-12