GDS/TDS Ratios Explained

Luisa Hough • December 25, 2024

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.


Recent Posts

Bank of Canada Rate Announcement Jul 30th, 2025

By Luisa & Candice Mortgages • July 30, 2025
Bank of Canada holds policy rate at 2¾%. FOR IMMEDIATE RELEASE Media Relations Ottawa, Ontario July 30, 2025 The Bank of Canada today maintained its target for the overnight rate at 2.75%, with the Bank Rate at 3% and the deposit rate at 2.70%. While some elements of US trade policy have started to become more concrete in recent weeks, trade negotiations are fluid, threats of new sectoral tariffs continue, and US trade actions remain unpredictable. Against this backdrop, the July Monetary Policy Report (MPR) does not present conventional base case projections for GDP growth and inflation in Canada and globally. Instead, it presents a current tariff scenario based on tariffs in place or agreed as of July 27, and two alternative scenarios—one with an escalation and another with a de-escalation of tariffs. While US tariffs have created volatility in global trade, the global economy has been reasonably resilient. In the United States, the pace of growth moderated in the first half of 2025, but the labour market has remained solid. US CPI inflation ticked up in June with some evidence that tariffs are starting to be passed on to consumer prices. The euro area economy grew modestly in the first half of the year. In China, the decline in exports to the United States has been largely offset by an increase in exports to the rest of the world. Global oil prices are close to their levels in April despite some volatility. Global equity markets have risen, and corporate credit spreads have narrowed. Longer-term government bond yields have moved up. Canada’s exchange rate has appreciated against a broadly weaker US dollar. The current tariff scenario has global growth slowing modestly to around 2½% by the end of 2025 before returning to around 3% over 2026 and 2027. In Canada, US tariffs are disrupting trade but overall, the economy is showing some resilience so far. After robust growth in the first quarter of 2025 due to a pull-forward in exports to get ahead of tariffs, GDP likely declined by about 1.5% in the second quarter. This contraction is mostly due to a sharp reversal in exports following the pull-forward, as well as lower US demand for Canadian goods due to tariffs. Growth in business and household spending is being restrained by uncertainty. Labour market conditions have weakened in sectors affected by trade, but employment has held up in other parts of the economy. The unemployment rate has moved up gradually since the beginning of the year to 6.9% in June and wage growth has continued to ease. A number of economic indicators suggest excess supply in the economy has increased since January. In the current tariff scenario, after contracting in the second quarter, GDP growth picks up to about 1% in the second half of this year as exports stabilize and household spending increases gradually. In this scenario, economic slack persists in 2026 and diminishes as growth picks up to close to 2% in 2027. In the de-escalation scenario, economic growth rebounds faster, while in the escalation scenario, the economy contracts through the rest of this year. CPI inflation was 1.9% in June, up slightly from the previous month. Excluding taxes, inflation rose to 2.5% in June, up from around 2% in the second half of last year. This largely reflects an increase in non-energy goods prices. High shelter price inflation remains the main contributor to overall inflation, but it continues to ease. Based on a range of indicators, underlying inflation is assessed to be around 2½%. In the current tariff scenario, total inflation stays close to 2% over the scenario horizon as the upward and downward pressures on inflation roughly offset. There are risks around this inflation scenario. As the alternative scenarios illustrate, lower tariffs would reduce the direct upward pressure on inflation and higher tariffs would increase it. In addition, many businesses are reporting costs related to sourcing new suppliers and developing new markets. These costs could add upward pressure to consumer prices. With still high uncertainty, the Canadian economy showing some resilience, and ongoing pressures on underlying inflation, Governing Council decided to hold the policy interest rate unchanged. We will continue to assess the timing and strength of both the downward pressures on inflation from a weaker economy and the upward pressures on inflation from higher costs related to tariffs and the reconfiguration of trade. If a weakening economy puts further downward pressure on inflation and the upward price pressures from the trade disruptions are contained, there may be a need for a reduction in the policy interest rate. Governing Council is proceeding carefully, with particular attention to the risks and uncertainties facing the Canadian economy. These include: the extent to which higher US tariffs reduce demand for Canadian exports; how much this spills over into business investment, employment and household spending; how much and how quickly cost increases from tariffs and trade disruptions are passed on to consumer prices; and how inflation expectations evolve. We are focused on ensuring that Canadians continue to have confidence in price stability through this period of global upheaval. We will support economic growth while ensuring inflation remains well controlled. Information note The next scheduled date for announcing the overnight rate target is September 17, 2025. Read the July 30th., 2025 Monetary Report

How Employment Status Impacts Your Mortgage Application

By Luisa & Candice Mortgages • July 23, 2025
Chances are if you’re applying for a mortgage, you feel confident about the state of your current employment or your ability to find a similar position if you need to. However, your actual employment status probably means more to the lender than you might think. You see, to a lender, your employment status is a strong indicator of your employer’s commitment to your continued employment. So, regardless of how you feel about your position, it’s what can be proven on paper that matters most. Let’s walk through some of the common ways lenders can look at employment status. Permanent Employment The gold star of employment. If your employer has made you a permanent employee, it means that your position is as secure as any position can be. When a lender sees permanent status (passed probation), it gives them the confidence that you’re valuable to the company and that they can rely on your income. Probationary Period Despite the quality of your job, if you’ve only been with the company for a short while, you’ll be required to prove that you’ve passed any probationary period. Although most probationary periods are typically 3-6 months, they can be longer. You might now even be aware that you’re under probation. The lender will want to make sure that you’re not under a probationary period because your employment can be terminated without any cause while under probation. Once you’ve made it through your initial evaluation, the lender will be more confident in your employment status. Now, it’s not the length of time with the employer that the lender is scrutinizing; instead, it’s the status of your probation. So if you’ve only been with a company for one month, but you’ve been working with them as a contractor for a few years, and they’re willing to waive the probationary period based on a previous relationship, that should give the lender all the confidence they need. We’ll have to get that documented. Parental Leave Suppose you’re currently on, planning to be on, or just about to be done a parental leave, regardless of the income you’re now collecting, as long as you have an employment letter that outlines your guaranteed return to work position (and date). In that case, you can use your return to work income to qualify on your mortgage application. It’s not the parental leave that the lender has issues with; it’s the ability you have to return to the position you left. Term Contracts Term contracts are hands down the most ambiguous and misunderstood employment status as it’s usually well-qualified and educated individuals who are working excellent jobs with no documented proof of future employment. A term contract indicates that you have a start date and an end date, and you are paid a specific amount for that specified amount of time. Unfortunately, the lack of stability here is not a lot for a lender to go on when evaluating your long-term ability to repay your mortgage. So to qualify income on a term contract, you want to establish the income you’ve received for at least two years. However, sometimes lenders like to see that your contract has been renewed at least once before considering it as income towards your mortgage application. In summary If you’ve recently changed jobs or are thinking about making a career change, and qualifying for a mortgage is on the horizon, or if you have any questions at all, please connect anytime. We can work through the details together and make sure you have a plan in place. It would be a pleasure to work with you!

Going Through A Divorce? Protect your Credit

By Luisa & Candice Mortgages • July 16, 2025
Divorces are challenging as there’s a lot to think about in a short amount of time, usually under pressure. And while handling finances is often at the forefront of the discussions related to the separation of assets, unfortunately, managing and maintaining personal credit can be swept aside to deal with later. So, if you happen to be going through or preparing for a divorce or separation, here are a few considerations that will help keep your credit and finances on track. The goal is to avoid significant setbacks as you look to rebuild your life. Manage Your Joint Debt If you have joint debt, you are both 100% responsible for that debt, which means that even if your ex-spouse has the legal responsibility to pay the debt, if your name is on the debt, you can be held responsible for the payments. Any financial obligation with your name on the account that falls into arrears will negatively impact your credit score, regardless of who is legally responsible for making the payments. A divorce settlement doesn’t mean anything to the lender. The last thing you want is for your ex-spouse’s poor financial management to negatively impact your credit score for the next six to seven years. Go through all your joint credit accounts, and if possible, cancel them and have the remaining balance transferred into a loan or credit card in the name of whoever will be responsible for the remaining debt. If possible, you should eliminate all joint debts. Now, it’s a good idea to check your credit report about three to six months after making the changes to ensure everything all joint debts have been closed and everything is reporting as it should be. It’s not uncommon for there to be errors on credit reports. Manage Your Bank Accounts Just as you should separate all your joint credit accounts, it’s a good idea to open a checking account in your name and start making all deposits there as soon as possible. You’ll want to set up the automatic withdrawals for the expenses and utilities you’ll be responsible for going forward in your own account. At the same time, you’ll want to close any joint bank accounts you have with your ex-spouse and gain exclusive access to any assets you have. It’s unfortunate, but even in the most amicable situations, money (or lack thereof) can cause people to make bad decisions; you want to protect yourself by protecting your assets. While opening new accounts, chances are your ex-spouse knows your passwords to online banking and might even know the pin to your bank card. Take this time to change all your passwords to something completely new, don’t just default to what you’ve used in the past. Better safe than sorry. Setup New Credit in Your Name There might be a chance that you’ve never had credit in your name alone or that you were a secondary signer on your ex-spouse’s credit card. If this is the case, it would be prudent to set up a small credit card in your name. Don’t worry about the limit; the goal is to get something in your name alone. Down the road, you can change things and work towards establishing a solid credit profile. If you have any questions about managing your credit through a divorce, please don’t hesitate to connect anytime. It would be a pleasure to work with you.

Luisa & Candice Mortgages 

Contact Me Anytime!

The best way to get ahold of me is to submit through the contact form below. However feel free to give me a shout on the phone as well.

Contact Us