A healthy household debt-to-income ratio in Canada is below 35% of gross monthly income spent on all debt payments. Lenders use two specific ratios: Gross Debt Service (GDS), which covers housing costs alone, with a 39% ceiling; and Total Debt Service (TDS), which adds all other debt, with a 44% ceiling. Above 50% TDS, financial stress increases sharply — one missed paycheque or rate increase can trigger missed payments.
Quick answer: GDS (housing only) should be below 39% of gross income. TDS (all debt including housing) should be below 44%. Lenders apply these limits when underwriting; for personal financial health, 35% TDS is the comfortable target.
What this means: Above 44%, you can’t qualify for a new mortgage at most banks. Above 50-55%, you have little buffer for emergencies and most additional borrowing becomes uneconomical.
What to do next: Calculate your GDS and TDS based on your income and current monthly obligations. Calculate your DTI →
The two ratios lenders use
Gross Debt Service (GDS) ratio
GDS = (mortgage payment + property tax + heat + 50% of condo fees) / gross monthly income
Federally insured mortgages and most uninsured mortgages cap GDS at 39%. This is the rule that determines the largest mortgage you can be approved for.
Total Debt Service (TDS) ratio
TDS = (GDS housing costs + all other debt payments) / gross monthly income
Other debt includes: credit card minimums, line of credit payments, car loans, student loans, personal loans, alimony, child support. Lenders cap TDS at 44%.
Healthy ranges
| TDS | Financial position | What to do |
|---|---|---|
| Below 30% | Strong. Room to invest or accelerate debt payoff. | Prioritize savings, RRSP, TFSA |
| 30-35% | Comfortable. Common Canadian household range. | Maintain savings rate; build emergency fund |
| 35-44% | Tight. Lenders will still approve mortgages but buffer is thin. | Avoid new debt; pay down high-rate balances |
| 44-50% | Cannot qualify for new mortgages. Modest debt-payoff capacity. | Pause discretionary spending; focus on highest-rate debt |
| Above 50% | High stress. One disruption causes missed payments. | Consider consolidation; talk to a credit counsellor or LIT |
Worked example
Family with $9,000 gross monthly income, looking at a $580,000 home with $116,000 down.
| Item | Monthly |
|---|---|
| Mortgage payment ($464K at 4.29%, 25-year) | $2,506 |
| Property tax | $340 |
| Heat | $140 |
| 50% of condo fee (N/A) | $0 |
| GDS | $2,986 / $9,000 = 33.2% (within 39% limit) |
| Car loan | $420 |
| Student loan | $190 |
| Credit card minimums | $110 |
| TDS | $3,706 / $9,000 = 41.2% (within 44% limit) |
The family qualifies under both ratios but with thin buffer. A small rate increase at renewal could push TDS above 44%, restricting future borrowing options.
How lenders calculate it
- Gross income is used (not net). Lenders apply the standard CRA tax formulas to discount it for affordability if needed.
- Mortgage payment uses the stress-test qualifying rate (contract rate + 2% or 5.25% floor), not the contract rate.
- Variable income (commissions, bonuses, self-employment) is typically averaged over 2-3 years.
- Lines of credit: lenders use 3% of the credit limit (not balance) as a minimum monthly payment for TDS purposes. A $50,000 LOC counts as $1,500/month even if you carry no balance.
- Credit cards: usually 3% of the balance is used, or the minimum payment, whichever is higher.
- Co-signed debt: usually counted at full payment, even if a co-signer covers it.
Five ways to lower your debt-to-income ratio
- Pay down balances on lines of credit. Cancelling unused credit lines removes the 3% phantom payment that hits TDS.
- Pay off credit cards. Direct attack on the highest-impact balance.
- Increase the down payment. A larger down payment lowers the mortgage payment, which lowers GDS.
- Extend amortization (if eligible). First-time buyers and new construction can use 30 years, reducing monthly mortgage payment by about 10%.
- Increase income. Documented bonuses, second-job income (after 2 years history), or rental income on a property all increase the denominator.
Canadian household debt-to-disposable-income
Statistics Canada tracks a different ratio: the household credit market debt-to-disposable-income ratio. In Q4 2025 it was 175%, meaning Canadians collectively owe $1.75 in debt for every dollar of after-tax income. This is among the highest in the G7. The mortgage debt portion is the largest component. The trend has been slowly declining since 2022 highs but remains structurally elevated.
Frequently asked questions
- What is a healthy debt-to-income ratio in Canada?
- Below 35% TDS for personal financial comfort. Lenders cap at 39% GDS (housing only) and 44% TDS (all debt). Above 50%, financial stress increases sharply.
- What is the difference between GDS and TDS?
- GDS includes only housing costs (mortgage, tax, heat, 50% of condo fees). TDS adds all other debt payments (credit cards, lines of credit, car loans, student loans).
- How do lenders count an unused line of credit?
- Lenders typically apply 3% of the credit limit (not the balance) as a minimum monthly payment for TDS purposes. A $50,000 unused LOC counts as $1,500/month.
- What is the Canadian household debt-to-income ratio?
- Approximately 175% as of Q4 2025 (Statistics Canada credit market debt to disposable income). Among the highest in the G7.
- Can I get a mortgage with TDS above 44%?
- Not from federally regulated lenders for an insured mortgage. Some uninsured mortgages from B-lenders or private lenders accept higher ratios but at higher rates.
- Does student loan debt count in TDS?
- Yes. Federal and provincial student loan payments are counted at the minimum monthly payment, even if you are in a six-month grace period.
- How can I lower my debt-to-income ratio?
- Pay down high-balance credit cards, cancel unused lines of credit, increase your down payment, or extend amortization (if first-time buyer or new construction).