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Financial Glossary
The debt-to-income (DTI) ratio is the percentage of your gross monthly income that goes toward debt payments, including mortgages, credit cards, student loans, auto loans, and other debts. Lenders use DTI to assess your ability to manage monthly payments and repay borrowed money. A lower DTI indicates better financial health.
DTI is one of the most important factors lenders evaluate when considering mortgage applications. It is calculated by dividing total monthly debt payments by gross monthly income. Lenders typically distinguish between front-end DTI (housing costs only) and back-end DTI (all debt payments). The front-end ratio should ideally be below 28%, while the back-end ratio should be below 36%. DTI requirements vary by loan type — conventional loans typically require DTI below 43%, while FHA loans may allow up to 50% with compensating factors. DTI is not the same as credit score — they evaluate different aspects of financial health.
Your salary directly determines how much debt you can carry. A higher salary increases your debt capacity without increasing your DTI. For example, someone earning $120,000 with $3,000 in monthly debt payments has a 30% DTI, while someone earning $60,000 with the same $3,000 in payments has a 60% DTI. When considering major purchases like a home, understanding how your DTI changes with different loan amounts is essential. Our mortgage calculator includes DTI analysis to help you find an affordable price range.
If your gross monthly income is $6,000 and your total monthly debt payments are $2,100 (mortgage: $1,500, car loan: $400, credit cards: $200), your DTI ratio is 35%. Most lenders prefer DTI ratios below 43% for mortgage approval, and below 36% for optimal rates.
A DTI ratio below 36% is considered good, with no more than 28% going toward housing costs. Ratios between 36% and 43% may still qualify for loans but with less favorable terms. Above 43%, mortgage approval becomes difficult.
Pay down existing debts, increase your income, avoid taking on new debt before applying for a mortgage, and consider consolidating high-interest debts. Our mortgage calculator can help you determine an affordable home price based on your DTI.
No. DTI only includes debt payments listed on your credit report — mortgages, car loans, student loans, credit card minimum payments, personal loans, and child support. Utilities, groceries, insurance, and everyday living expenses are not included in DTI calculations.
The 28/36 rule is a specific DTI guideline: no more than 28% of gross income for housing costs (front-end) and no more than 36% for total debt (back-end). DTI is the general metric; 28/36 is one common threshold used by conventional lenders.
Yes, but with limitations. FHA loans may allow DTI up to 50% with compensating factors like a high credit score or large down payment. Some conventional loans accept up to 45-50% DTI. A high DTI typically results in higher interest rates and may require additional documentation.
Canada calculators use data from the following official government agencies:
Our Canadian calculators use federal and provincial tax brackets, CPP/QPP contribution rates, and EI premiums published by the Canada Revenue Agency (CRA). Economic data is sourced from Statistics Canada. Mortgage calculations use Bank of Canada rates and market averages. All figures are for educational purposes.
All tax brackets, contribution rates, and economic data used in our calculators are sourced from the official government publications listed above. Rates are updated at least annually to reflect the latest tax year and regulatory changes. Users should verify critical figures with official sources or qualified professionals.
Last updated: June 2026. Information may change; always verify with official sources.
Last Updated: July 2026 — Reviewed Against Official Sources
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