What You Need to Know for Mortgage Approval

Debt-to-Income Ratio Explained: What You Need to Know for Mortgage Approval

February 13, 20254 min read

When applying for a mortgage in Canada, one of the most critical factors lenders evaluate is your debt-to-income (DTI) ratio. This metric plays a significant role in determining whether you qualify for a mortgage and what interest rates you’ll be offered. Whether you’re a first-time homebuyer or looking to refinance, understanding your DTI ratio is essential to securing the best mortgage rates in Canada.

In this blog post, we’ll break down everything you need to know about your debt-to-income ratio, how it’s calculated, and how it impacts your mortgage approval process.


What Is a Debt-to-Income Ratio?

Your debt-to-income ratio is a percentage that compares your monthly debt payments to your gross monthly income. Lenders use this ratio to assess your ability to manage monthly payments and repay your mortgage.

There are two types of DTI ratios:

  1. Gross Debt Service (GDS) Ratio: This includes housing-related expenses like mortgage payments, property taxes, heating costs, and condo fees.

  2. Total Debt Service (TDS) Ratio: This includes all your debts, such as credit card payments, car loans, student loans, and other obligations, in addition to housing costs.

Most lenders in Canada prefer a GDS ratio of 32% or lower and a TDS ratio of 40% or lower. Exceeding these limits may make it harder to qualify for a mortgage or result in higher interest rates.


Why Does Your DTI Ratio Matter for Mortgage Approval?

Your DTI ratio is a key indicator of your financial health. Lenders use it to determine:

  • Your ability to handle additional debt.

  • The likelihood of you defaulting on your mortgage.

  • The best mortgage rates you qualify for.

A lower DTI ratio not only improves your chances of approval but also helps you secure low mortgage rates in Ontario or other provinces. On the other hand, a high DTI ratio may limit your options or require you to work with a mortgage broker to find specialized lenders.


How to Calculate Your Debt-to-Income Ratio

Calculating your DTI ratio is simple:

  1. Add up all your monthly debt payments (e.g., credit cards, loans, and housing costs).

  2. Divide this total by your gross monthly income.

  3. Multiply the result by 100 to get your DTI percentage.

For example, if your monthly debts total 2,000andyourgrossmonthlyincomeis2,000andyourgrossmonthlyincomeis6,000, your DTI ratio would be 33%.


Tips to Improve Your DTI Ratio

If your DTI ratio is too high, here are some strategies to improve it:

  1. Pay Down Debt: Focus on reducing credit card balances, car loans, or other high-interest debts.

  2. Increase Your Income: Consider a side hustle or ask for a raise to boost your monthly earnings.

  3. Avoid New Debt: Hold off on taking out new loans or credit cards before applying for a mortgage.

  4. Work with a Mortgage Broker: A mortgage broker in Toronto or your local area can help you find lenders with more flexible DTI requirements.


How Your DTI Ratio Affects Mortgage Rates in Canada

Your DTI ratio directly impacts the interest rates for Canada mortgages. Borrowers with lower DTI ratios are seen as less risky and often qualify for the best mortgage deals in Canada, including 5-year fixed mortgage rates.

For example, if you’re looking for the best mortgage rates in Ontario, maintaining a DTI ratio below 40% can help you secure competitive rates from top lenders.


Pre-Approval and Refinancing: What to Know

Whether you’re getting pre-approved for a mortgage or considering refinancing your mortgage, your DTI ratio will be a key factor.

  • Pre-Approval: Lenders will evaluate your DTI ratio to determine how much you can borrow.

  • Refinancing: If your DTI ratio has improved since you first took out your mortgage, you may qualify for lower home loan rates in Canada.


Final Thoughts

Understanding your debt-to-income ratio is crucial for securing the best mortgage rates in Canada and achieving your homeownership goals. By managing your debts and working with a trusted mortgage brokerage, you can improve your financial profile and unlock better mortgage options.

Ready to take the next step? Use our home mortgage rate calculator to estimate your monthly payments and explore the lowest mortgage rates in Ontario or your province.


By optimizing your DTI ratio and staying informed about current mortgage rates in Ontario and other regions, you can confidently navigate the mortgage process and secure the best deal for your needs.

Sarah is a Lead Underwriter as RateShop. Sarah manages her team that is resposible for completing over 400 mortgage transactions a year. She has been working with several nationwide lenders, with expert knowledge in Canadian Mortgage Lending criteria, her focus is on guiding her clients through the difficult choices of fixed and variable rates, terms and helps identify opportunities that save them more money.

Sarah Papa

Sarah is a Lead Underwriter as RateShop. Sarah manages her team that is resposible for completing over 400 mortgage transactions a year. She has been working with several nationwide lenders, with expert knowledge in Canadian Mortgage Lending criteria, her focus is on guiding her clients through the difficult choices of fixed and variable rates, terms and helps identify opportunities that save them more money.

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