Mortgage Approval 101: GDS & TDS Explained

Danielle McIntosh • August 20, 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.


Danielle McIntosh

Licensed Mortgage Broker

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How to Get a Mortgage for a Second Property

By Danielle McIntosh • December 17, 2025
Thinking About Buying a Second Property? Here’s What to Know Buying a second property is an exciting milestone—but it’s also a big financial decision that deserves thoughtful planning. Whether you're dreaming of a vacation retreat, building a rental portfolio, or looking to support a family member with a place to live, there are plenty of reasons to consider a second home. But before you jump in, it's important to understand the strategy and steps involved. Start with “Why” The best place to begin? Clarify your motivation. Ask yourself: Why do I want to buy a second property? What role will it play in my life or finances? How does this fit into my long-term goals? Whether your focus is lifestyle, income, or legacy planning, knowing your “why” will help you make smarter decisions from the start. Talk to a Mortgage Expert Early Once you’ve nailed down your goals, the next step is to sit down with an independent mortgage professional. Why? Because buying a second property isn't quite the same as buying your first. Even if you’ve qualified before, financing a second home has unique considerations—especially when it comes to down payments, debt ratios, and how lenders assess risk. How Much Do You Need for a Down Payment? Here’s where the purpose of the property really matters: Owner-occupied or family use: You may qualify with as little as 5–10% down, depending on the property and lender. Income property: Expect to put down 20–35%, especially for short-term rentals or if it won’t be occupied by you or a family member. Your down payment amount can be one of the biggest hurdles—but with strategic planning, it’s often manageable. Ways to Fund the Down Payment If you don’t have the full amount in cash, you might be able to tap into your current home’s equity to help fund the purchase. Here are a few ways to do that: ✅ Refinance your existing mortgage to access additional funds ✅ Secure a second mortgage behind your current one ✅ Open a HELOC (Home Equity Line of Credit) ✅ Use a reverse mortgage (in certain age-qualified scenarios) ✅ Take out a new mortgage if your current home is mortgage-free These options depend on your income, credit, home value, and overall financial picture—another reason why having a pro in your corner matters. Second Property Strategy: It’s More Than Just Numbers This purchase should be part of a bigger financial plan—one that balances risk and reward. It’s about: Assessing your full financial health Maximizing your existing assets Minimizing your cost of borrowing Aligning your purchase with your long-term goals Ready to Take the Next Step? There’s no one-size-fits-all answer when it comes to buying a second property. That’s why it helps to talk things through with someone who understands both the big picture and the small details. If you’re ready to explore your options and build a plan to make that second property dream a reality, let’s connect. I’d love to help you take the next step with confidence.

Bank of Canada Rate Announcement Dec 10th, 2025

By Danielle McIntosh • December 10, 2025
Bank of Canada maintains policy rate at 2.1/4%. FOR IMMEDIATE RELEASE Media Relations Ottawa, Ontario December 10, 2025 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%. Major economies around the world continue to show resilience to US trade protectionism, but uncertainty is still high. In the United States, economic growth is being supported by strong consumption and a surge in AI investment. The US government shutdown caused volatility in quarterly growth and delayed the release of some key economic data. Tariffs are causing some upward pressure on US inflation. In the euro area, economic growth has been stronger than expected, with the services sector showing particular resilience. In China, soft domestic demand, including more weakness in the housing market, is weighing on growth. Global financial conditions, oil prices, and the Canadian dollar are all roughly unchanged since the Bank’s October Monetary Policy Report (MPR). Canada’s economy grew by a surprisingly strong 2.6% in the third quarter, even as final domestic demand was flat. The increase in GDP largely reflected volatility in trade. The Bank expects final domestic demand will grow in the fourth quarter, but with an anticipated decline in net exports, GDP will likely be weak. Growth is forecast to pick up in 2026, although uncertainty remains high and large swings in trade may continue to cause quarterly volatility. Canada’s labour market is showing some signs of improvement. Employment has shown solid gains in the past three months and the unemployment rate declined to 6.5% in November. Nevertheless, job markets in trade-sensitive sectors remain weak and economy-wide hiring intentions continue to be subdued. CPI inflation slowed to 2.2% in October, as gasoline prices fell and food prices rose more slowly. CPI inflation has been close to the 2% target for more than a year, while measures of core inflation remain in the range of 2½% to 3%. The Bank assesses that underlying inflation is still around 2½%. In the near term, CPI inflation is likely to be higher due to the effects of last year’s GST/HST holiday on the prices of some goods and services. Looking through this choppiness, the Bank expects ongoing economic slack to roughly offset cost pressures associated with the reconfiguration of trade, keeping CPI inflation close to the 2% target. If inflation and economic activity evolve broadly in line with the October projection, Governing Council sees the current policy rate at about the right level to keep inflation close to 2% while helping the economy through this period of structural adjustment. Uncertainty remains elevated. If the outlook changes, we are prepared to respond. The Bank is focused on 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 January 28, 2026. The Bank’s next MPR will be released at the same time.