Mortgage Stress Test and Payment Shock Calculator
See the monthly and annual payment change when the rate rises. Canada uses the editable qualifying-rate floor and spread by default. The U.S. view is an educational payment-shock comparison, not a federally required stress test.
Best for
Make the next pricing or planning decision with context
Compare a contract payment with a higher-rate scenario before a purchase, renewal, or refinance conversation. Canada applies qualifying-rate logic using the higher of the rate floor or contract rate plus spread; the U.S. view shows educational payment shock and does not claim a federally required stress test.
Instant calculations · Editable fee assumptions · Export-ready results
Inputs
Values update results instantly. Adjust fee assumptions to match your seller dashboard.
Your figures are saved in this browser on this device.
Scenario
Balance to compare at both rates.
Rate assumptions
Added to the contract rate in both country modes.
Canada uses the higher of contract plus the spread or this floor.
Housing-cost assumptions
Used only to estimate conventional U.S. PMI when below 20%.
Editable PMI planning rate applied to the mortgage when down payment is below 20%.
Canada counts 50% for ratio impact; U.S. HOA counts at 100%.
Ratio impact
Optional. Add income to see ratio impact beside the payment shock.
Used for TDS or back-end DTI impact.
Editable reference line for the Canada ratio view.
Editable reference line for the Canada ratio view.
Editable lender-guidance reference, not a universal federal limit.
Editable lender-guidance reference, not a universal federal limit.
Results
Live estimates based on your inputs and editable fee assumptions.
Contract payment
$2,965.21
Selected-frequency payment at the contract rate.
Qualifying or scenario payment
$3,564.04
Selected-frequency payment at the comparison rate.
Monthly-equivalent increase
$598.82
Scenario payment minus contract payment, normalized to a month.
Annual payment increase
$7,185.89
Monthly-equivalent increase multiplied by 12.
Contract rate
5.2%
Rate used for the base payment.
Qualifying or scenario rate
7.2%
Canada applies the floor; U.S. adds the editable comparison increase.
Contract housing ratio
36.3%
GDS-style ratio in Canada, front-end DTI-style ratio in the U.S.
Scenario housing ratio
42.3%
Housing ratio after the payment change.
Contract debt ratio
45.3%
TDS-style ratio in Canada, back-end DTI-style ratio in the U.S.
Scenario debt ratio
51.3%
Debt ratio after the payment change.
What this means
Canada payment shock: the scenario adds $598.82 per month and $7,185.89 per year at the selected comparison rate.
Contract payment versus payment shock
Interactive breakdown of fees, costs, and remaining profit.
Distribution
- Contract payment$2,965.2157.8%
- Payment increase$598.8211.7%
- Other housing costs$661.6712.9%
- Other monthly debts$900.0017.6%
Total $5,125.70 · 4 segments · interactive
Line-item breakdown
Dollar amounts, share of revenue, and visual proportion.
- Contract selected payment
- $2,965.21
- Scenario selected payment
- $3,564.04
- Contract monthly-equivalent payment
- $2,965.21
- Scenario monthly-equivalent payment
- $3,564.04
- Monthly-equivalent payment increase
- $598.82
- Annual payment increase
- $7,185.89
- Other housing costs used in ratios
- $661.67
- Contract housing ratio
- 36.3%
- Scenario housing ratio
- 42.3%
- Contract debt ratio
- 45.3%
- Scenario debt ratio
- 51.3%
Assumptions used
- • Canada contract rate 5.20%; comparison rate 7.20%
- • Payment frequency: monthly; comparison increase 2.00 percentage points
- • Other housing costs in ratio impact: $661.67 per month
- • Ratios use gross monthly income of $10,000.00 and other debts of $900.00
- • Canada condo fees use 50% in ratio impact; GDS reference 39.0%, TDS reference 44.0%
Your next best moves
Use your Mortgage Stress Test result to make the next decision. These Mortgage & Home Buying tools follow the same cost and pricing thread.
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Download a practical checklist for pricing, hidden cost leaks, and healthier profit decisions alongside this result.
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Explore Mortgage & Home BuyingMortgage Stress Test / Payment Shock Calculator
Generated 9/10/2026, 1:19:08 AM · Currency CAD
Inputs
- Country: canada
- Mortgage amount: 500000
- Contract interest rate: 5.2
- Remaining amortization (years): 25
- Payment frequency: monthly
- Comparison-rate increase: 2
- Canada qualifying-rate floor: 5.25
- Down payment percent: 20
- U.S. conventional PMI rate (annual): 0.5
- Property tax (annual): 5000
- Heating or utilities (monthly): 125
- Homeowners insurance (monthly): 120
- Condo fees or HOA (monthly): 0
- Gross monthly income: 10000
- Other monthly debts: 900
- Canada GDS reference: 39
- Canada TDS reference: 44
- U.S. front-end DTI reference: 28
- U.S. back-end DTI reference: 36
Results
- Contract selected payment: $2,965.21
- Scenario selected payment: $3,564.04
- Contract monthly-equivalent payment: $2,965.21
- Scenario monthly-equivalent payment: $3,564.04
- Monthly-equivalent payment increase: $598.82
- Annual payment increase: $7,185.89
- Other housing costs used in ratios: $661.67
- Contract housing ratio: 36.3%
- Scenario housing ratio: 42.3%
- Contract debt ratio: 45.3%
- Scenario debt ratio: 51.3%
Interpretation
Canada payment shock: the scenario adds $598.82 per month and $7,185.89 per year at the selected comparison rate.
How it works
Methodology & formulas
This calculator is transparent by design. Review the steps and formulas so you can trust the estimate and adjust assumptions when your dashboard differs.
Calculation steps
- 1Calculate contract and comparison rates.
- 2Calculate both payments over the selected remaining amortization and frequency.
- 3Add the same recurring housing-cost assumptions to both scenarios.
- 4Compare monthly and annual payment changes, then show optional GDS/TDS or front/back DTI impact.
Formulas
- Canada scenario rate = max(contract rate + increase, floor)
- U.S. scenario rate = contract rate + increase
- Payment = P × r × (1 + r)^n ÷ ((1 + r)^n − 1)
- Monthly increase = (scenario payment − contract payment) × payments per year ÷ 12
- Debt ratio = (monthly-equivalent payment + housing costs + other debts) ÷ gross monthly income × 100
Important assumptions
- Canada qualifying rate defaults to max(contract rate + 2%, 5.25%). The spread and floor are editable review assumptions based on the commonly used qualifying-rate rule. Confirm current federal, insurer, and lender treatment.
- The U.S. view adds an editable comparison increase to the contract rate. It is an educational payment-shock comparison, not a federally required stress test.
- Canadian quoted rates use semi-annual compounding conversion. U.S. principal and interest uses monthly rate conversion.
- Canada uses 50% of condo fees in ratio impact. U.S. HOA uses the full amount. U.S. PMI is a conventional planning estimate when down payment is below 20%.
- Lender-specific treatment, renewal rules, refinance rules, taxes, insurance, income, and debt calculations can differ. This is not approval or financial advice.
Sources & review
Know what this estimate is built on
Use these official references to locate the policy, plan, or help details behind the editable inputs.
Official references
Use the current terms
These Canadian and U.S. government references are starting points for mortgage insurance, home-buying education, and selected taxes. They do not validate every default or determine eligibility. Rates, fees, taxes, rebates, qualifying rules, and lender criteria change by jurisdiction and borrower. Use the editable assumptions, then confirm current terms with a licensed mortgage broker or lender.
Defaults are editable estimates. Match them to your current account, provider statement, official authority, lender, or adviser before making a pricing or investment decision.
Calculator model reviewed: August 9, 2026. This date covers the page and calculator guidance, not a guarantee that every live platform rate or term was re-audited on that date.
Worked example
A two-point Canadian payment shock
$500,000 mortgage, 5.20% contract rate, 25-year remaining amortization, monthly payments, and the default 2% spread with a 5.25% floor.
FAQ
Common questions
Related guides
Read the guide behind the number
Use these practical guides to check the assumptions behind Mortgage Stress Test before you make the next decision.
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