Debt-to-Income Ratio Calculator

↻ Updated 2026

Canadian lenders qualify you on two ratios: GDS (housing costs) and TDS (all debts). Calculate both and see how they stack up against the 39% / 44% CMHC guidelines.

Educational calculators — always consult a licensed professional before making financial decisions.

Your inputs

Gross monthly income

Before taxes and deductions

Mortgage or rent

Monthly mortgage payment (or rent)

Property tax

Monthly portion of annual property tax

Heating costs

Lenders include heat in the housing figure

Other monthly debt payments

Car loans, credit cards, lines of credit, student loans

TDS ratio

39.3%

Within guideline — at or under the 44% TDS limit

GDS ratio (housing)

32.1%

at or under the 39% guideline

Total monthly debt

$2,750

of $7,000 income

Lender view: Canadian mortgage lenders use GDS ≤ 39% / TDS ≤ 44% (CMHC guidelines). You're at 32.1% / 39.3% — both within the ratios lenders like to see.

Income allocation

Housing (GDS)$2,250

Other debts$500

Income left$4,250

Against CMHC guidelines

GDS — housing ÷ income32.1% · target ≤ 39%

TDS — all debt ÷ income39.3% · target ≤ 44%

Room before 44% TDS$330/mo of debt

ASSUMPTIONS — The gross debt service (GDS) ratio is your housing costs — mortgage or rent, property tax and heating — divided by gross (pre-tax) monthly income. The total debt service (TDS) ratio adds all other monthly debt payments. CMHC guidelines are GDS ≤ 39% and TDS ≤ 44% for a default-insured mortgage; some lenders allow higher with strong credit. For condos, lenders also include a portion of condo fees in GDS.

Runs entirely in your browser — nothing you enter is sent to us.How this works

Embed this calculator

Related calculators

Debt Payoff Debt Consolidation Personal Loan

Sources & rate references

·CMHC mortgage qualification guidelines (GDS ≤ 39% / TDS ≤ 44%)

Rates, brackets and limits here are checked against primary sources. If a number still looks off, email support@realmoneyiq.com and we'll review and fix it.

RealMoneyIQ provides free educational calculators, not financial, tax, investment or legal advice. Results are estimates based on the assumptions you enter and publicly published rates; your actual outcome will differ. Always confirm decisions with a licensed professional who knows your full situation.