What Are GDS/TDS Ratios Anyways?

Jamie Ushko • February 26, 2025

One of the major qualifiers lenders look at when considering your application for mortgage financing is your debt service ratios.


Now, before we get started, if you prefer to have someone walk through these calculations with you, assess your financial situation, and let you know exactly where you stand, let’s connect. There is no use in dusting off the calculator and running the numbers yourself when we can do it for you!


However, if you’re someone who likes to know the nitty-gritty of how things work instead of simply accepting that's just the way it is, this article is for you. But be warned, there are a lot of mortgage words and some math ahead; with that out of the way, let’s get started!

 

“Debt servicing” is the measure of your ability to meet all of your financial obligations. There are two ratios that lenders examine to determine whether you can debt service a mortgage.


The first is called the “gross debt service” ratio, or GDS, which is the percentage of your monthly household income that covers your housing costs. The second is called the “total debt service” ratio, or TDS, which is the percentage of your monthly household income covering your housing costs and all your other debts.


GDS is your income compared to the cost of financing the mortgage, including your proposed mortgage payments (principal and interest), property taxes, and heat (PITH), plus a percentage of your condo fees (if applicable).


Here’s how to calculate your GDS.


Principal + Interest + Taxes + Heat / Gross Annual Income


Your TDS is your income compared to your GDS plus the payments made to service any existing debts. Debts include car loans, line of credit, credit card payments, support payments, student loans, and anywhere else you’re contractually obligated to make payments.


Here’s how to calculate your TDS.


Principal + Interest + Taxes + Heat + Other Debts / Gross Annual Income


With the calculations for those ratios in place, the next step is to understand that each lender has guidelines that outline a maximum GDS/TDS. Exceeding these guidelines will result in your mortgage application being declined, so the lower your GDS/TDS, the better.


If you don’t have any outstanding debts, your GDS and TDS will be the same number. This is a good thing!


The maximum ratios vary for conventional mortgage financing based on the lender and mortgage product being offered. However, if your mortgage is high ratio and mortgage default insurance is required, the maximum GDS is 39% with a maximum TDS of 44%.


So how does this play out in real life? Well, let’s say you’re currently looking to purchase a property with a payment of $1700/mth (PITH), and your total annual household income is $90,000 ($7500/mth). The calculations would be $1700 divided by $7500, which equals 0.227, giving you a gross debt service ratio of 22.7%.


A point of clarity here. When calculating the principal and interest portion of the payment, the Government of Canada has instituted a stress test. It requires you to qualify using the government's qualifying rate (which is higher), not the actual contract rate. This is true for both fixed and variable rate mortgages.


Now let’s continue with the scenario. Let’s say that in addition to the payments required to service the property, you have a car payment of $300/mth, child support payments of $500/mth, and between your credit cards and line of credit, you’re responsible for another $700/mth. In total, you pay $1500/mth. So when you add in the $1700/mth PITH, you arrive at a total of $3200/mth for all of your financial obligations. $3200 divided by $7500 equals 0.427, giving you a total debt service ratio of 42.7%.


Here’s where it gets interesting. Based on your GDS alone, you can easily afford the property. But when you factor in all your other expenses, the TDS exceeds the allowable limit of 42% (for an insured mortgage anyway). So why does this matter? Well, as it stands, you wouldn’t qualify for the mortgage, even though you are likely paying more than $1700/mth in rent.


So then, to qualify, it might be as simple as shuffling some of your debt to lower payments. Or maybe you have 10% of the purchase price saved for a downpayment, changing the mortgage structure to 5% down and using the additional 5% to pay out a portion of your debt might be the difference you need to bring it all together.


Here’s the thing, as your actual financial situation is most likely different than the one above, working with an independent mortgage professional is the best way to give yourself options. Don’t do this alone. Your best plan is to seek and rely on the advice provided by an experienced independent mortgage professional. While you might secure a handful of mortgages over your lifetime, we do this every day with people just like you.


It’s never too early to start the conversation about mortgage qualification. Going over your application and assessing your debt service ratios in detail beforehand gives you the time needed to make the financial moves necessary to put yourself in the best financial position.


So if you find yourself questioning what you can afford or if you want to discuss your GDS/TDS ratios to understand the mortgage process a little better, please get in touch. It would be a pleasure to work with you, we can get a preapproval started right away.


Jamie Ushko

Mortgage Broker

Is Alternative Lending the Right Choice for Your Mortgage Needs?

By Jamie Ushko • February 18, 2026
Alternative Lending in Canada: What It Is and When It Makes Sense Not everyone fits into the traditional lending box—and that’s where alternative mortgage lenders come in. Alternative lending refers to any mortgage solution that falls outside of the typical big bank offerings. These lenders are flexible, creative, and focused on helping Canadians who may not qualify for traditional financing still access the real estate market. Let’s explore when alternative lending might be the right fit for you. 1. You Have Damaged Credit Bad credit doesn’t have to mean your homeownership dreams are over. Many alternative lenders take a big-picture approach . While credit scores matter, they’ll also look at: Stable employment Consistent income Size of your down payment or existing equity If your credit has taken a hit but you can demonstrate strong income and savings—or have a solid explanation for past credit issues— an alternative lender may approve your mortgage when a bank won’t. Pro tip: Use an alternative mortgage as a short-term solution while you rebuild your credit, then refinance into a traditional mortgage with better terms down the line. 2. You're Self-Employed Being your own boss has its perks—but mortgage approval isn’t usually one of them. Traditional lenders require verifiable, consistent income—often two years’ worth. But self-employed Canadians typically write off significant expenses, reducing their declared income. Alternative lenders are more flexible and understanding of self-employed income structures. If your business is profitable and your personal finances are healthy, you may qualify even with lower stated income. Even if interest rates are slightly higher, this option is often worth it—especially when balanced against tax planning and business deductions . 3. You Earn Non-Traditional Income Today’s income sources aren’t always conventional. If you earn through: Airbnb rentals Tips and gratuities Rideshare or delivery apps (like Uber or Uber Eats) Commissions or contracts You might face challenges with traditional lenders. Alternative lenders are often more willing to work with these non-standard income streams , especially if the rest of your mortgage application is strong. Some will consider a shorter income history or evaluate your average earnings in a more flexible way. 4. You Need Expanded Debt-Service Ratios Canada’s mortgage stress test has made it harder for many borrowers to qualify with big banks. Alternative lenders can offer more generous debt-service ratio limits —meaning you might be able to qualify for a larger mortgage or a more suitable home, especially in competitive markets. While traditional GDS/TDS limits typically sit at 35/42 or 39/44 (depending on your credit), some alternative lenders will go higher, especially if: You have a larger down payment Your loan-to-value ratio is lower Your overall financial profile is strong It’s not a free-for-all—but it’s more flexible than bank lending. So, Is Alternative Lending Right for You? Alternative lending is designed to offer solutions when life doesn’t fit the traditional mold . Whether you're rebuilding credit, running your own business, or earning income in new ways, this path could help you get into a home sooner—or keep your current one. And here’s the key: You can only access alternative lenders through the mortgage broker channel . Let’s Explore Your Options Not sure where you fit? That’s okay. Every mortgage story is unique—and I’m here to help you write yours. If you’re curious about alternative mortgage products, want a second opinion, or need help getting approved, let’s talk . I’d be happy to help you explore the best solution for your situation. Reach out anytime. It would be a pleasure to work with you.

Is Refinancing Your Mortgage a Good Way to Consolidate Debt?

By Jamie Ushko • February 11, 2026
If you're a homeowner juggling multiple debts, you're not alone. Credit cards, car loans, lines of credit—it can feel like you’re paying out in every direction with no end in sight. But what if there was a smarter way to handle it? Good news: there is. And it starts with your home. Use the Equity You’ve Built to Lighten the Load Every mortgage payment you make, every bit your home appreciates—you're building equity. And that equity can be a powerful financial tool. Instead of letting high-interest debts drain your income, you can leverage your home’s equity to combine and simplify what you owe into one manageable, lower-interest payment. What Does That Look Like? This strategy is called debt consolidation , and there are a few ways to do it: Refinance your existing mortgage Access a Home Equity Line of Credit (HELOC) Take out a second mortgage Each option has its own pros and cons, and the right one depends on your situation. That’s where I come in—we’ll look at the numbers together and choose the best path forward. What Can You Consolidate? You can roll most types of consumer debt into your mortgage, including: Credit cards Personal loans Payday loans Car loans Unsecured lines of credit Student loans These types of debts often come with sky-high interest rates. When you consolidate them into a mortgage—secured by your home—you can typically access much lower rates, freeing up cash flow and reducing financial stress. Why This Works Debt consolidation through your mortgage offers: Lower interest rates (often significantly lower than credit cards or payday loans) One simple monthly payment Potential for faster repayment Improved cash flow And if your mortgage allows prepayment privileges—like lump-sum payments or increased monthly payments—those features can help you pay everything off even faster. Smart Strategy, Not Just a Quick Fix This isn’t just about lowering your monthly bills (although that’s a major perk). It’s about restructuring your finances in a way that’s sustainable, efficient, and empowering. Instead of feeling like you're constantly catching up, you can create a plan to move forward with confidence—and even start saving again. Here’s What the Process Looks Like: Review your current debts and cash flow Assess how much equity you’ve built in your home Explore consolidation options that fit your goals Create a personalized plan to streamline your payments and reduce overall costs Ready to Regain Control? If your debts are holding you back and you're ready to use the equity you've worked hard to build, let's talk. There’s no pressure—just a practical conversation about your options and how to move toward a more flexible, debt-free future. Reach out today. I’m here to help you make the most of what you already have.