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HOMS Mortgage Modeler

Stress-test your purchase before the bank does.

Runs the OSFI B-20 stress test, the Canadian semi-annual compounded payment, and your GDS/TDS ratios — in real time, on your numbers.

OSFI B-20 stress test
Tight — review with broker
Stress rate 7.29% · GDS 46.1% · TDS 49.3%
CMHC guidance: GDS ≤ 39%, TDS ≤ 44%. Lenders vary.

At the contract rate

Down payment
$290,000
Principal
$1,160,000
Monthly P&I
5.29% over 30y
$6,393
Total shelter / mo
$6,980
GDS
38.1%
TDS
41.3%

At the stress rate

Monthly P&I
7.29% over 30y
$7,860
Δ vs. contract
$1,466
GDS
46.1%
TDS
49.3%

Calculator uses the Canadian semi-annual compounded mortgage convention and the federal stress-test rule (the greater of contract+2% or 5.25%). Estimates only; not financial advice or a pre-approval.

Why the stress test matters

Federally-regulated lenders qualify you at the greater of your contract rate + 2% or 5.25%. If your debt-service ratios don't pass that, your real budget is lower than your contract rate suggests.

GDS & TDS

GDS = shelter ÷ gross income. TDS = (shelter + other debt) ÷ gross income. Most lenders cap GDS near 39% and TDS near 44%.

What this doesn't cover

CMHC insurance premium calculations, FTHB incentives, B-lender qualification. Book a consult and we'll run the full Monte Carlo on your actual budget.

Real estate services are provided by Moji Dargahi, licensed real estate professional with [Brokerage Name]. HOMS Group is a registered trade name; HOMS Group Corp. is a marketing and technology company and is not a licensed real estate brokerage. Tool outputs are estimates for informational purposes only and do not constitute an appraisal or financial advice.