Debt Service Ratios

Understand debt service ratios in Canadian real estate — how GDS and TDS work, their thresholds, and how lenders use them to approve mortgages.

Debt Service Ratios

May 22, 2025


What are Debt Service Ratios?

Debt service ratios are financial metrics used by lenders to assess a borrower’s ability to manage mortgage payments in relation to their income.

Why Do Debt Service Ratios Matter in Real Estate?

In Canadian real estate, two primary ratios are used:

1. Gross Debt Service (GDS) Ratio:
  • Measures housing costs vs. gross income
  • Includes mortgage, property taxes, heating, and 50% of condo fees
  • Generally must be under 39%
2. Total Debt Service (TDS) Ratio:
  • Measures all debt obligations vs. gross income
  • Includes GDS plus other debts like car loans and credit cards
  • Generally must be under 44%

Lenders use these ratios to determine mortgage eligibility. Staying within these limits ensures that homeowners can afford their housing without becoming financially overextended.

Understanding debt service ratios helps buyers prepare for pre-approval, understand loan limits, and evaluate financial readiness.

Example of Debt Service Ratios in Action

A buyer with $6,000 monthly income and $2,100 in housing costs has a GDS of 35%. Including $500 in other debts, their TDS is 43%—within lender guidelines.

Key Takeaways

  • Used to evaluate mortgage affordability.
  • GDS focuses on housing costs; TDS includes all debts.
  • Lenders require ratios within specific limits.
  • Helps determine mortgage approval.
  • Essential part of financial readiness.

Related Terms

  • GDS
  • TDS
  • Mortgage Qualification
  • Pre-Approval
  • Lender Guidelines

Additional Terms

Public Realm Improvements

Public realm improvements are enhancements to public spaces such as sidewalks, parks, plazas, and streetscapes, often funded or contributed by. more

Mortgagee in Possession

A mortgagee in possession is a lender who takes control of a property after borrower default, but before foreclosure or power of sale. The lender. more

Lease Surrender Agreement

A lease surrender agreement is a negotiated contract between a landlord and tenant that ends a lease before its scheduled expiration. Terms may. more

Green Infrastructure

Green infrastructure refers to natural or engineered systems that manage stormwater, reduce heat, and improve sustainability in developments.. more

Escrow Holdback

An escrow holdback is a portion of funds withheld at closing and held in escrow until specific conditions are met, such as completion of repairs,. more

Underused Housing Tax

The Underused Housing Tax (UHT) is a federal annual 1% tax on the value of vacant or underused residential property owned by non-resident,. more

More For You

OpenForm, Alabaster Planning 32-And 28-Storey Towers In Metrotown

OpenForm, Alabaster Planning 32-And 28-Storey Towers In Metrotown

The proposal for 6470 and 6508 Silver Avenue in Burnaby. (OpenForm Properties, Alabaster Homes, Arcadis)

Vancouver-based developers OpenForm Properties and Alabaster Homes are partnering on a two-tower project in the Metrotown neighbourhood of Burnaby, according to a rezoning application set to be considered by Council this week.

The subject site of the proposal is 6470 and 6508 Silver Avenue, which is located directly across the street from Maywood Park and half a block away from Metrotown Station.

Keep Reading Show less

GTA Low-Rise Sales Top 10-Year Average For Second Month

GTA Low-Rise Sales Top 10-Year Average For Second Month
Aerial photo of Toronto skyline

GTA new home sales aren't out of the woods yet — but the low-rise market is making a strong case for optimism.

For the second consecutive month, single-family home sales in the Greater Toronto Area surpassed the 10-year average, buoyed by the enhanced HST rebate program introduced in April 2026. According to new data from BILD and market intelligence firm Altus Group, 830 single-family homes sold in the GTA in May — 26% above the segment's 10-year average, and a significant jump from the same month in 2025.

Keep Reading Show less

Canderel Breaks Ground On Forêt Forest Hill With Five-Bank Financing In Place

Canderel Breaks Ground On Forêt Forest Hill With Five-Bank Financing In Place

(liveatforet.ca)

At Bathurst and St. Clair, Canderel has officially started construction on Forêt Forest Hill — its three-tower, master-planned community in midtown Toronto.

The development has secured construction financing from a consortium of five major Canadian banks led by CIBC, with National Bank, TD, Desjardins, and Laurentian Bank rounding out the group.

Keep Reading Show less

The 6 Key Takeaways From CMHC's 2026 Mid-Year Rental Market Update

The 6 Key Takeaways From CMHC's 2026 Mid-Year Rental Market Update

(CMHC)

Last week, Rentals.ca published their latest rental market report, noting that the average asking rent in Canada declined by 4.7% year over year in May, marking the 20th consecutive month to see a year-over-year decline.

“Since reaching a low of $1,662 in April 2021 during COVID-19, average rents have risen 22.1%, but have declined 7.8% from the high of $2,202 in May 2024,” they said.

Keep Reading Show less

Ontario Brokerages Required To File Finances With RECO Starting This Fall

Ontario Brokerages Required To File Finances With RECO Starting This Fall
Shutterstock

Ontario real estate brokerages are getting a new piece of homework, courtesy of their regulator.

Starting October 1, 2026, every brokerage in the province will have to attest to and submit an annual financial filing to the Real Estate Council of Ontario (RECO) — a requirement meant to give RECO a clearer, more consistent look at how brokerages manage money, and specifically the funds they're holding in trust on behalf of buyers and sellers.

Keep Reading Show less

Spring Market At Last? Canadian Home Sales Jumped 5.5% In May

Spring Market At Last? Canadian Home Sales Jumped 5.5% In May
Shutterstock

After a spring that never quite got going, the Canadian housing market found a gear in May.

Home sales across Canadian MLS® Systems rose 5.5% from April, according to the Canadian Real Estate Association (CREA) — the first month in 2026 to post any meaningful upward momentum in headline demand.

Keep Reading Show less

Coast Mental Health Planning 29-Storey Social Housing Tower In Mount Pleasant

Coast Mental Health Planning 29-Storey Social Housing Tower In Mount Pleasant

The proposal for 259-293 E 11th Ave and 216 Kingsway in Vancouver. (Diamond Schmitt Architects, Coast Mental Health)

A rezoning application has been submitted for a high-rise mixed-use tower in Vancouver that's residential space would consist entirely of social housing.

The subject site of the proposal is 259-293 East 11th Avenue and 216 Kingsway, located on the western side of Sophia Street in the Mount Pleasant neighbourhood, and is part of the Broadway Plan area.

Keep Reading Show less
TRENDING: Coast Mental Health Planning 29-Storey Social Housing In Mount Pleasant

Bank Of Canada Holds Interest Rate At 2.25%

Bank Of Canada Holds Interest Rate At 2.25%

The Bank of Canada held its overnight rate at 2.25% on June 10, citing a mix of domestic weakness and global turbulence that has complicated the economic outlook.

Canada's GDP slipped 0.1% in Q1, weaker than the Bank had projected in April, and the economy is expected to remain in excess supply even as growth rebounds modestly in Q2.

Keep Reading Show less
Privacy Policy About Us Terms of Use Advertise with Us Jobs Contact Us RSS Feed
All rights reserved SiteMedia © 2026.