Good credit and still declined?
In Ontario, that usually points to one thing: Total Debt Service.
Total Debt Service, or TDS, is the calculation lenders use to decide whether your monthly payments are sustainable. It applies whether you are buying, refinancing, or consolidating debt using home equity.
If you are considering debt consolidation, understanding this number is not optional. It is the gatekeeper.
Learn where you stand. Run the numbers.
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What Is Total Debt Service (TDS)?
Total Debt Service is the percentage of your gross monthly income that goes toward required debt payments.
In simple terms:
All required monthly debt payments ÷ gross monthly income = TDS ratio
It measures how much of your income is already committed before you spend a dollar on anything else.
Lenders use it to assess sustainability. Not comfort. Sustainability.
Why Lenders Rely on TDS
Lenders are not just approving a property. They are approving a repayment plan.
TDS helps them answer one core question:
Can this borrower reasonably handle these payments over time?
The ratio is part of broader underwriting standards across Canada. Different lenders have different internal maximums. Some are stricter. Some are more flexible. The principle is consistent. Payments must fit the income.
In many cases, lenders calculate TDS using a qualifying rate that may be higher than your actual contract rate. That can change the math quickly.
GDS vs TDS What Is the Difference?
You may also hear about GDS.
GDS stands for Gross Debt Service. It focuses only on housing costs.
TDS includes housing plus all other required debts.
| Ratio | What It Includes | Why It Matters |
| GDS | Mortgage payment, property taxes, heating, condo fees if applicable | Measures housing affordability |
| TDS | Housing costs plus all other required debt payments | Measures total financial strain |
If GDS is acceptable but TDS is too high, approval can still fail. TDS is the broader test.
What Counts in Total Debt Service (and What Does Not)
TDS includes required monthly obligations such as:
- Mortgage payment or proposed mortgage payment
- Property taxes
- Heating
- Condo fees where applicable
- Minimum credit card payments
- Car loans or leases
- Personal loans
- Lines of credit
- Student loans
- Support or alimony payments where required
Even small payments matter. Two credit cards with modest balances can add more to your TDS than most people expect because lenders use required minimum payments, not what you choose to pay.
What usually does not count:
- Utilities beyond standard heat estimate
- Insurance premiums
- Groceries
- Subscriptions
The focus is on contractual debt obligations.
Why You Can Have Good Credit and Still Be Declined
Credit score measures payment history and risk behaviour. It does not measure affordability.
A borrower can have excellent credit but carry:
- Multiple car payments
- High credit card minimums
- Installment loans
- Existing mortgage obligations
If those required payments push the ratio too high relative to income, approval becomes difficult.
This is often the reason behind the question, “Why did I get declined with good credit?”
Because approval is not driven by score alone. It is driven by ratios.
The Simple TDS Formula With an Ontario Example
Assume:
Gross monthly income: $8,000
Proposed mortgage payment: $2,400
Property taxes and heat: $500
Car loan: $600
Credit cards minimum payments: $450
Line of credit minimum payment: $250
Total required monthly payments: $4,200
TDS = $4,200 ÷ $8,000 = 52.5%
Depending on lender guidelines, that ratio may exceed acceptable limits.
Now look at what happens if unsecured debts are consolidated into the mortgage.
New mortgage payment after consolidation: $2,950
Property taxes and heat: $500
Car loan: $600
Total required monthly payments: $4,050
New TDS = $4,050 ÷ $8,000 = 50.6%
In this example, consolidation improves the ratio slightly, but not dramatically. In other cases, the improvement can be more meaningful. It depends on interest rates, amortization, and income stability.
The point is this: small monthly obligations add up quickly. The math moves fast.
How Debt Consolidation Can Change the TDS Math
When higher interest revolving debts are rolled into a structured mortgage payment, required monthly payments may decrease. That can reduce the TDS ratio.
However, there are important variables:
- The qualifying rate used for ratio calculation
- The new amortization period
- Lender maximum ratio guidelines
- Income documentation quality
- Whether the file is reviewed by a prime, alternative, or private lender
Consolidation can improve the math. It does not guarantee approval. The full file still needs to fit underwriting standards.
See what options you may qualify for.
Qualification depends on income, ratios, and property details.
What To Do If Your Total Debt Service Is Too High
If your TDS ratio is above acceptable levels, there are practical levers to consider.
Pay down revolving balances. Lower balances reduce minimum payment requirements.
Eliminate smaller installment loans. Clearing one or two modest payments can materially change the ratio.
Extend amortization where permitted. A longer amortization can reduce required monthly payments.
Add a strong co borrower. Additional stable income can shift the ratio.
Improve income documentation. Self employed borrowers sometimes qualify using averaged or adjusted income if properly documented.
Delay the transaction. In some cases, time and disciplined repayment improve the picture.
Each option depends on your situation. The key is to adjust the inputs that feed the ratio.
Common Mistakes That Inflate TDS
Underestimating minimum payments. Lenders use required minimums, not your planned payment.
Forgetting condo fees. These are included in housing costs.
Ignoring car leases. Lease payments count.
Assuming a small line of credit balance does not matter. It does.
Believing credit score overrides ratios. It does not.
Frequently Asked Questions
What is Total Debt Service (TDS)?
Total Debt Service is the percentage of your gross income that goes toward required debt payments, including housing and all other contractual obligations.
What is a good Total Debt Service ratio in Canada?
Many lenders use internal maximums that fall within defined ranges, but approval depends on lender guidelines, income stability, and the overall application. There is no single universal cutoff that guarantees approval.
What debts count toward Total Debt Service?
Mortgage payments, property taxes, heating, condo fees, credit card minimum payments, car loans or leases, student loans, personal loans, lines of credit, and required support payments typically count.
Does a HELOC count toward Total Debt Service?
Yes. Lenders generally include a required minimum payment or calculated payment amount when assessing a HELOC balance.
Why did I get declined with good credit?
Because affordability is separate from credit score. If required monthly payments push your TDS ratio beyond acceptable limits, approval may not be granted even with strong credit.
Can debt consolidation improve my Total Debt Service ratio?
It can, if required monthly payments decrease relative to income. The impact depends on loan structure, qualifying rate, and overall financial profile.
How Mortgage Brain Can Help Canadians
If your Total Debt Service is too high, it does not automatically mean you are out of options. It usually means the file needs the right structure and the right review.
Mortgage Brain helps Canadian homeowners understand why a deal was declined, how TDS is being calculated, and what changes may improve the numbers. If home equity is part of the picture, our team can help you explore consolidation pathways that may reduce required monthly payments and improve affordability.
We do not guess or promise outcomes. We help you get clarity, run the math properly, and connect you with licensed professionals who can confirm what is possible based on your income, debts, and property details.
If you want to know where you stand, start with a quick review. No obligation. Contact us today to take the first step and see what may be possible.
Disclaimer: This article is for general information only and does not constitute financial advice. Mortgage options, rates, fees, and eligibility vary by lender and individual circumstances. All costs and terms are disclosed in writing before any agreement is finalized.
