Mortgage Approval 101: GDS & TDS Explained

Lori Lalonde • December 2, 2025

Can You Afford That Mortgage? Let’s Talk About Debt Service Ratios

One of the biggest factors lenders look at when deciding whether you qualify for a mortgage is something called your debt service ratios. It’s a financial check-up to make sure you can handle the payments—not just for your new home, but for everything else you owe as well.


If you’d rather skip the math and have someone walk through this with you, that’s what I’m here for. But if you like to understand how things work behind the scenes, keep reading. We’re going to break down what these ratios are, how to calculate them, and why they matter when it comes to getting approved.


What Are Debt Service Ratios?

Debt service ratios measure your ability to manage your financial obligations based on your income. There are two key ratios lenders care about:

  1. Gross Debt Service (GDS)
    This looks at the percentage of your income that would go toward housing expenses only.

   2. Total Debt Service (TDS)
       This includes your housing costs plus all other debt payments—car loans, credit cards, student loans, support payments, etc.


How to Calculate GDS and TDS

Let’s break down the formulas.


GDS Formula:

(P + I + T + H + Condo Fees*) ÷ Gross Monthly Income


Where:

P = Principal

I = Interest

T = Property Taxes

H = Heat


Condo fees are usually calculated at 50% of the total amount


TDS Formula:

(GDS + Monthly Debt Payments) ÷ Gross Monthly Income


These ratios tell lenders if your budget is already stretched too thin—or if you’ve got room to safely take on a mortgage.


How High Is Too High?


Most lenders follow maximum thresholds, especially for insured (high-ratio) mortgages.

As of now, those limits are typically:

GDS: Max 39%

TDS: Max 44%


Go above those numbers and your application could be declined, regardless of how confident you feel about your ability to manage the payments.


Real-World Example

Let’s say you’re earning $90,000 a year, or $7,500 a month.

You find a home you love, and the monthly housing costs (mortgage payment, property tax, heat) total $1,700/month.


GDS = $1,700 ÷ $7,500 = 22.7%


You’re well under the 39% cap—so far, so good.


Now factor in your other monthly obligations:

  • Car loan: $300
  • Child support: $500
  • Credit card/line of credit payments: $700
    Total other debt = $1,500/month


Now add that to the $1,700 in housing costs:
TDS = $3,200 ÷ $7,500 = 42.7%


Uh oh. Even though your GDS looks great, your TDS is just over the 42% limit. That could put your mortgage approval at risk—even if you’re paying similar or higher rent now.


What Can You Do?

In cases like this, small adjustments can make a big difference:

  • Consolidate or restructure your debts to lower monthly payments
  • Reallocate part of your down payment to reduce high-interest debt
  • Add a co-applicant to increase qualifying income
  • Wait and build savings or credit strength before applying


This is where working with an experienced mortgage professional pays off. We can look at your entire financial picture and help you make strategic moves to qualify confidently.


Don’t Leave It to Chance

Everyone’s situation is different, and debt service ratios aren’t something you want to guess at. The earlier you start the conversation, the more time you’ll have to improve your numbers and boost your chances of approval.


If you're wondering how much home you can afford—or want help analyzing your own GDS and TDS—let’s connect. I’d be happy to walk through your numbers and help you build a solid mortgage strategy.


Lori LaLonde

Bank of Canada Rate Announcement Jan 28th, 2026

By Lori Lalonde • January 28, 2026
Bank of Canada maintains policy rate at 2¼%. FOR IMMEDIATE RELEASE Media Relations Ottawa, Ontario January 28, 2026 The Bank of Canada today held its target for the overnight rate at 2.25%, with the Bank Rate at 2.5% and the deposit rate at 2.20%. The outlook for the global and Canadian economies is little changed relative to the projection in the October Monetary Policy Report (MPR). However, the outlook is vulnerable to unpredictable US trade policies and geopolitical risks. Economic growth in the United States continues to outpace expectations and is projected to remain solid, driven by AI-related investment and consumer spending. Tariffs are pushing up US inflation, although their effect is expected to fade gradually later this year. In the euro area, growth has been supported by activity in service sectors and will get additional support from fiscal policy. China’s GDP growth is expected to slow gradually, as weakening domestic demand offsets strength in exports. Overall, the Bank expects global growth to average about 3% over the projection horizon. Global financial conditions have remained accommodative overall. Recent weakness in the US dollar has pushed the Canadian dollar above 72 cents, roughly where it had been since the October MPR. Oil prices have been fluctuating in response to geopolitical events and, going forward, are assumed to be slightly below the levels in the October report. US trade restrictions and uncertainty continue to disrupt growth in Canada. After a strong third quarter, GDP growth in the fourth quarter likely stalled. Exports continue to be buffeted by US tariffs, while domestic demand appears to be picking up. Employment has risen in recent months. Still, the unemployment rate remains elevated at 6.8% and relatively few businesses say they plan to hire more workers. Economic growth is projected to be modest in the near term as population growth slows and Canada adjusts to US protectionism. In the projection, consumer spending holds up and business investment strengthens gradually, with fiscal policy providing some support. The Bank projects growth of 1.1% in 2026 and 1.5% in 2027, broadly in line with the October projection. A key source of uncertainty is the upcoming review of the Canada-US-Mexico Agreement. CPI inflation picked up in December to 2.4%, boosted by base-year effects linked to last winter’s GST/HST holiday. Excluding the effect of changes in taxes, inflation has been slowing since September. The Bank’s preferred measures of core inflation have eased from 3% in October to around 2½% in December. Inflation was 2.1% in 2025 and the Bank expects inflation to stay close to the 2% target over the projection period, with trade-related cost pressures offset by excess supply. Monetary policy is focused on keeping inflation close to the 2% target while helping the economy through this period of structural adjustment. Governing Council judges the current policy rate remains appropriate, conditional on the economy evolving broadly in line with the outlook we published today. However, uncertainty is heightened and we are monitoring risks closely. If the outlook changes, we are prepared to respond. The Bank is committed to ensuring that Canadians continue to have confidence in price stability through this period of global upheaval. Information note The next scheduled date for announcing the overnight rate target is March 18, 2026. The Bank’s next MPR will be released on April 29, 2026. Read the January 28th, 2026 Monetary Report

How to Access Your Home Equity Wisely

By Lori Lalonde • January 20, 2026
Need to Free Up Some Cash? Your Home Equity Could Help If you've owned your home for a while, chances are it’s gone up in value. That increase—paired with what you’ve already paid down—is called home equity, and it’s one of the biggest financial advantages of owning property. Still, many Canadians don’t realize they can tap into that equity to improve their financial flexibility, fund major expenses, or support life goals—all without selling their home. Let’s break down what home equity is and how you might be able to use it to your advantage. First, What Is Home Equity? Home equity is the difference between what your home is worth and what you still owe on it. Example: If your home is valued at $700,000 and you owe $200,000 on your mortgage, you have $500,000 in equity . That’s real financial power—and depending on your situation, there are a few smart ways to access it. Option 1: Refinance Your Mortgage A traditional mortgage refinance is one of the most common ways to tap into your home’s equity. If you qualify, you can borrow up to 80% of your home’s appraised value , minus what you still owe. Example: Your home is worth $600,000 You owe $350,000 You can refinance up to $480,000 (80% of $600K) That gives you access to $130,000 in equity You’ll pay off your existing mortgage and take the difference as a lump sum, which you can use however you choose—renovations, investments, debt consolidation, or even a well-earned vacation. Even if your mortgage is fully paid off, you can still refinance and borrow against your home’s value. Option 2: Consider a Reverse Mortgage (Ages 55+) If you're 55 or older, a reverse mortgage could be a flexible way to access tax-free cash from your home—without needing to make monthly payments. You keep full ownership of your home, and the loan only becomes repayable when you sell, move out, or pass away. While you won’t be able to borrow as much as a conventional refinance (the exact amount depends on your age and property value), this option offers freedom and peace of mind—especially for retirees who are equity-rich but cash-flow tight. Reverse mortgage rates are typically a bit higher than traditional mortgages, but you won’t need to pass income or credit checks to qualify. Option 3: Open a Home Equity Line of Credit (HELOC) Think of a HELOC as a reusable credit line backed by your home. You get approved for a set amount, and only pay interest on what you actually use. Need $10,000 for a new roof? Use the line. Don’t need anything for six months? No payments required. HELOCs offer flexibility and low interest rates compared to personal loans or credit cards. But they can be harder to qualify for and typically require strong credit, stable income, and a solid debt ratio. Option 4: Get a Second Mortgage Let’s say you’re mid-term on your current mortgage and breaking it would mean hefty penalties. A second mortgage could be a temporary solution. It allows you to borrow a lump sum against your home’s equity, without touching your existing mortgage. Second mortgages usually come with higher interest rates and shorter terms, so they’re best suited for short-term needs like bridging a gap, paying off urgent debt, or funding a one-time project. So, What’s Right for You? There’s no one-size-fits-all solution. The right option depends on your financial goals, your current mortgage, your credit, and how much equity you have available. We’re here to walk you through your choices and help you find a strategy that works best for your situation. Ready to explore your options? Let’s talk about how your home’s equity could be working harder for you. No pressure, no obligation—just solid advice.