GDS/TDS Ratios Explained

Tim Lacroix • February 5, 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.


Tim Lacroix

Mortgage Broker

APPLY NOW
By Tim Lacroix March 26, 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!
By Tim Lacroix March 19, 2025
If you’re new to the home buying process, it’s easy to get confused by some of the terms used. The purpose of this article is to clear up any confusion between the deposit and downpayment. What is a deposit? The deposit is the money included with a purchase contract as a sign of good faith when you offer to purchase a property. It’s the “consideration” that helps make up the contract and binds you to the agreement. Typically, you include a certified cheque or a bank draft that your real estate brokerage holds while negotiations are finalized when you offer to purchase a property. If your offer is accepted, your deposit is held in your Realtor’s trust account. If your offer is accepted and you commit to buying the property, your deposit is transferred to the lawyer’s trust account and included in your downpayment. If you aren’t able to reach an agreement, the deposit is refunded to you. However, if you commit to buying the property and don’t complete the transaction, your deposit could be forfeit to the seller. Your deposit goes ahead of the downpayment but makes up part of the downpayment. The amount you put forward as a deposit when negotiating the terms of a purchase contract is arbitrary, meaning there is no predefined or standard amount. Instead, it’s best to discuss this with your real estate professional as your deposit can be a negotiating factor in and of itself. A larger deposit may give you a better chance of having your offer accepted in a competitive situation. It also puts you on the hook for more if something changes down the line and you cannot complete the purchase. What is a downpayment? Your downpayment refers to the initial payment you make when buying a property through mortgage financing. In Canada, the minimum downpayment amount is 5%, as lenders can only lend up to 95% of the property’s value. Securing mortgage financing with anything less than 20% down is only made possible through mortgage default insurance. You can source your downpayment from your resources, the sale of a property, an RRSP, a gift from a family member, or borrowed funds. Example scenario Let’s say that you are looking to purchase a property worth $400k. You’re planning on making a downpayment of 10% or $40k. When you make the initial offer to buy the property, you put forward $10k as a deposit your real estate brokerage holds in their trust account. If everything checks out with the home inspection and you’re satisfied with financing, you can remove all conditions. Your $10k deposit is transferred to the lawyer’s trust account, where will add the remaining $30k for the downpayment. With your $40k downpayment made, once you sign the mortgage documents and cover the legal and closing costs, the lender will forward the remaining 90% in the form of a mortgage registered to your title, and you have officially purchased the property! If you have any questions about the difference between the deposit and the downpayment or any other mortgage terms, please connect anytime. It would be a pleasure to work with you.
Share by: