Risk lens
See payments and debt ratios across higher-rate scenarios before renewal. Change any assumption and the full plan recalculates instantly.
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Monthly principal and interest across the tested renewal rates.
At 6.75%, the modeled monthly payment is $3,562.26.
| Period | Monthly payment |
|---|---|
| 4.75% | $2,951 |
| 5.75% | $3,250 |
| 6.75% | $3,562 |
| 7.75% | $3,886 |
| 9.75% | $4,564 |
| Rate | Payment | Total debt ratio |
|---|---|---|
| 4.75% | $2,950.77 | 40.7% |
| 5.75% | $3,250.12 | 43.5% |
| 6.75% | $3,562.26 | 46.5% |
| 7.75% | $3,886.07 | 49.6% |
| 9.75% | $4,564.08 | 56.2% |
Planning estimate only. Lenders use their own qualification, compounding, rounding, insurance, fee, tax, and contract rules.
Calculator guide
A rate stress test shows how payment and debt ratios change when the modeled rate rises. Use the current balance for a renewal scenario or price and down payment for a purchase scenario.
This tool is a household risk lens. It does not reproduce every lender qualification rule or guarantee approval.
The table isolates rate changes while holding the other assumptions constant. Real renewals may also include a different balance, amortization, payment frequency, income, and expenses.
If a moderate increase makes the budget unworkable, consider a smaller loan, larger buffer, prepayment plan, or earlier renewal preparation.
Questions answered
No. It models payment and debt-ratio sensitivity, while a lender applies the current qualifying rules and its underwriting.
Yes. Use the balance and amortization expected at renewal, then compare likely and higher rates.
It adds two percentage points to the entered mortgage rate, such as 4.5% becoming 6.5%.
Rules and tax programs can change. Confirm the current requirements before acting.
Use the estimate well
It can model transparent assumptions, compare scenarios, and expose tradeoffs. It cannot approve a loan, quote a lender, predict markets, interpret your contract, or replace licensed advice.
Run the base case, a higher rate, a lower home value, and a cash-buffer case.
Confirm compounding, prepayment, fees, insurance, dates, and lender rounding.
A feasible payment is not the same as a resilient household budget.
Related field notes
Understand what stays fixed, what can still change, and how term, amortization, penalties, and renewal affect a fixed-rate mortgage.
MarketA dated July 2026 mortgage-rate update for Canada and the United States, plus a framework for turning market news into a payment range.