What is the maximum mortgage I can qualify for?

What is the maximum mortgage I can qualify for?

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By Tony Sousa
November 14, 2025 8 min read

What is the maximum mortgage I can qualify for?



Want the biggest mortgage you can qualify for? Read this and know the number in minutes.

Quick answer

Your maximum mortgage depends on four things: gross income, credit score, monthly debts, and the qualifying rules your lender uses (debt ratios, stress-test rate). In Canada lenders use GDS/TDS (rough guide: 39%/44%). In the U.S. many lenders look at debt-to-income (DTI) — often 43%–50% depending on loan type and compensating factors.

How lenders calculate maximum mortgage (step-by-step)

    • Convert annual income to gross monthly income. Example: $120,000/year = $10,000/month.
    • Apply the lender’s housing ratio. In Canada use GDS 39%: 0.39 × $10,000 = $3,900 allowed for housing costs (mortgage payment + taxes + heat + condo fees).
    • Subtract expected property taxes and condo/other housing fees to get the potential mortgage payment.
    • Convert that monthly payment to principal using the mortgage rate and amortization. Use an online mortgage calculator or this quick rule of thumb:
    • At 5% interest, 25-year amortization, monthly payment per $100,000 ≈ $585.
    • So a $2,915 mortgage payment ≈ $2,915 / $585 × $100,000 ≈ $498,000.
    • Check total debt: lenders also test Total Debt Service (TDS) or DTI. Add monthly debts (car, credit cards) and ensure total is under the lender’s TDS/DTI cap.

Key numbers you control

    • Credit score: higher score increases your borrowing power and lowers rate.
    • Down payment: larger down payment reduces loan amount and may eliminate mortgage insurance.
    • Debt reduction: paying off consumer debt raises your maximum.
    • Rate shopping: lower interest or longer amortization raises your buying power.

Example calculation (clear)

Gross monthly income: $8,333 GDS max: 39% → housing budget = $3,250 Assume taxes/condo/heat = $500 → available monthly mortgage payment = $2,750 Using 5% / 25-yr → payment per $100k ≈ $585 → estimated mortgage ≈ $2,750 / $585 × $100,000 ≈ $470,000 Final usable mortgage depends on downstream TDS check and stress test.

Practical checklist to maximize your approved mortgage

    • Get a free pre-approval. It locks in the qualifying number and identifies weak points.
    • Improve credit score (short-term: correct errors; mid-term: reduce balances).
    • Lower debts before applying.
    • Increase down payment to lower loan-to-value (LTV) and avoid insurance.
    • Lock a lower rate or choose longer amortization only when it makes sense.

Bottom line and immediate action

You can estimate your maximum mortgage in 10 minutes using your pay stubs and a mortgage calculator. For an accurate number based on local rules and the current stress-test rate, get a pre-approval.

Want a precise, lender-ready maximum mortgage number for your situation? Contact Tony Sousa — local mortgage-savvy realtor who runs quick pre-approvals and real numbers into offers. Email: [email protected] | Phone: 416-477-2620 | https://www.sousasells.ca

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