The Co-Signing Trap: Why Parents Who Helped Kids Buy Homes in 2021 Can’t Get Off the Mortgage

The Bank of Canada has been gradually lowering its policy rate since 2024, with expectations for continued stability through 2026. As of March 2026, five-year fixed mortgage rates hover around 4.50% to 4.89% — dramatically lower than the 6.5% peaks of 2023, but offering little comfort to a specific group of borrowers facing an unexpected crisis. According to CMHC’s 2026 Housing Market Outlook, Ontario housing prices continue declining, with the most expensive urban centers seeing the steepest drops as high inventory meets subdued demand. For the one in four Ontario mortgage holders who added parents or family members as co-signers during the 2020-2021 buying frenzy, these market conditions have transformed what seemed like a temporary helping hand into a long-term financial entanglement with consequences few anticipated.

If you co-signed a mortgage for your children between 2020 and early 2022, or if your parents co-signed for you during that period, the renewal conversations happening in 2026 are likely far more complicated than anyone expected. What financial advisors and bankruptcy trustees are now describing as a “double crisis” represents a perfect storm of declining property values and insufficient income growth, preventing families from unwinding arrangements they assumed would be temporary. This article examines how we arrived at this point and why the standard exit strategies aren’t working for hundreds of thousands of Ontario families.

The 2020–2021 Housing Market Fever: When Co-Signing Seemed Brilliant

To understand the current situation, it helps to revisit the mindset that dominated Canadian real estate markets from mid-2020 through the first quarter of 2022. The pandemic-era housing market operated under assumptions that now appear far more optimistic than many anticipated. Properties in Ontario’s major urban centres regularly received multiple competing offers, with bidding wars pushing final sale prices well above the asking price.

For parents who had purchased their own homes 15 or 20 years earlier and watched those properties appreciate significantly, these projections aligned with their personal experience. A generation of homeowners who bought properties in the late 1990s and early 2000s for under $200,000 later owned assets worth close to $1 million or more in some markets. When their adult children faced barriers to homeownership due to insufficient income relative to rising prices, co-signing seemed like a practical solution.

The decision to co-sign often felt reasonable on multiple levels. Parents naturally want to help their children achieve the same milestones they experienced, and homeownership remains a significant aspiration in Canadian culture. The five-year term structure of Canadian mortgages also appeared to offer a natural timeline: after several years of salary increases and potential property appreciation, many families expected the primary borrowers to qualify independently and remove the parents from the mortgage at renewal.

In that environment, co-signing was often viewed as a way to help bridge the gap between rising property prices and the incomes of younger buyers.

Joint and Several Liability: The Legal Reality Most Co-Signers Didn’t Understand

The foundation of the current situation rests on a legal principle that many co-signers either did not fully understand or underestimated when signing mortgage documents: joint and several liability. In common understanding, many people assume that if four individuals co-sign a mortgage, each person is responsible for a portion of the debt. The actual legal structure is different. Each co-signer on a mortgage is individually responsible for the full outstanding debt if required.

This legal framework means that when parents co-sign a $650,000 mortgage for their children, they are legally obligated for the entire mortgage balance should the lender require repayment. From the lender’s perspective, all parties to the mortgage are equally responsible, regardless of who lives in the property or who normally makes the payments.

The implications extend beyond the worst-case scenario of default. For co-signers approaching retirement or already retired, a substantial mortgage obligation on their credit profile can affect their financial flexibility. This debt appears on credit reports and is included in debt service calculations such as the Gross Debt Service ratio (GDS), which measures housing costs as a percentage of income, and the Total Debt Service ratio (TDS), which includes all debt obligations.

If parents later wish to downsize their home, access equity, or apply for additional credit, lenders will typically assess their application while considering this mortgage obligation. Even if the primary borrowers are making all payments, the co-signer’s liability remains part of the lender’s risk assessment.

Crisis Point One: Property Values That Declined Instead of Soaring

One complication facing families seeking to remove co-signers at renewal is that property values in some Ontario markets have declined from their 2021 peaks. CMHC housing outlook reports indicate that certain markets have experienced softer prices due to higher inventory and slower demand.

Consider a simplified example. A young couple purchased a semi-detached home in Mississauga in February 2021 for $1.1 million with parental co-signers enabling their qualification. They contributed a 10% down payment of $110,000 and secured a $990,000 mortgage at a 5-year fixed rate of 1.79%. By the time their February 2026 renewal approaches, comparable properties in the neighbourhood might sell between $925,000 and $950,000.

If the property value declines while the mortgage balance remains high, the loan-to-value ratio (LTV), which measures the mortgage amount relative to property value, may remain elevated. Traditional refinancing options typically require at least 20% equity for conventional mortgages. If borrowers do not meet that threshold, removing a co-signer through refinancing may not be possible through standard lending channels.

Alternative lenders sometimes consider higher LTV situations, but these products typically carry higher interest rates. The result is that some families continue with the existing co-signing structure until market conditions or financial circumstances change.

For some parents, this means the original five-year expectation for co-signing may extend beyond what was anticipated.

Crisis Point Two: Income Growth That Never Materialized

Even in situations where property values remain relatively stable, another challenge can arise: the income growth that was expected to enable independent qualification may not have materialized.

The original need for co-signing in 2020 and 2021 often reflected the gap between rising property prices and household incomes. The expectation was that several years of career progression would allow borrowers to qualify independently when the mortgage was renewed.

However, wage growth has varied across sectors. Some households saw moderate increases in income, while others experienced relatively small annual raises. While these increases may keep pace with inflation, they may not substantially improve mortgage qualification capacity.

The mortgage stress test requirement also plays a role. Since January 2018, federally regulated lenders must qualify borrowers at the greater of the contract rate plus 2% or the benchmark rate of 5.25%. At current five-year fixed rates around 4.50% to 4.89%, borrowers may need to qualify at rates around 6.50% or higher.

This can significantly increase the income required to qualify independently for a large mortgage. Even borrowers who have successfully managed their payments for several years may still face qualification barriers if their income does not meet the required thresholds under current rules.

The Scale of Co-Signing Arrangements During the Housing Boom

While individual families experiencing these challenges may feel isolated, co-signing arrangements became increasingly common during the 2020–2021 housing boom. In markets where home prices rose rapidly, many buyers relied on family support to help qualify for mortgages.

These arrangements allowed many younger buyers to enter the housing market earlier than they might otherwise have been able to. However, as mortgages from that period reach their first renewal between 2026 and 2027, some families are discovering that removing co-signers is not always straightforward.

For parents who expected their involvement to be temporary, the possibility of remaining on the mortgage longer than planned can affect financial planning and borrowing capacity. For adult children, it may mean that their homeownership continues to involve shared financial responsibility within the family.

Understanding Your Current Position: Assessment Before Action

For families facing renewal of co-signing arrangements, the first step is to understand their current financial position before exploring potential options.

This typically begins with evaluating the property’s current market value compared with the remaining mortgage balance. Reviewing recent comparable sales in the neighbourhood can help estimate the property’s approximate value and determine the loan-to-value ratio.

The next step is to review household income and compare it with current mortgage qualification requirements. Borrowers can estimate qualification thresholds by calculating mortgage payments at current interest rates plus the stress-test buffer, then comparing those payments to their income.

Finally, families should consider the practical implications of continuing the co-signing arrangement. In some cases, maintaining the existing structure may be manageable if relationships remain positive and the co-signer’s borrowing capacity is not immediately needed elsewhere.

Understanding these factors provides a clearer picture of whether removing the co-signer is currently feasible or whether additional time may be required.

The Broker Value in Assessing Complex Situations

When circumstances do not align with straightforward refinancing through a current lender, working with a licensed mortgage broker can provide additional perspective. Brokers review options from multiple lenders and can help borrowers understand what may be possible under current guidelines.

A broker can evaluate factors such as income levels, equity position, and potential alternative lending solutions. They may also outline what financial changes might be necessary over the next several years to make co-signer removal more achievable.

In some situations, the most helpful outcome is a clear understanding of the current limitations, combined with a plan to improve qualifications in the future.

Conclusion

The co-signing arrangements that enabled many families to purchase homes during the 2020–2021 housing boom sometimes extend beyond the originally expected period. Changes in property values, income levels, and lending requirements can make removing co-signers at renewal more complex than anticipated.

For families approaching renewal between now and late 2027, early discussions with licensed mortgage professionals can help clarify the available options and potential timelines. In some cases, co-signer removal may not be immediately possible, but understanding the financial factors involved can help families plan their next steps.

The experience of the past several years highlights the importance of approaching co-signing arrangements with a clear understanding of the legal and financial responsibilities involved. Even when the initial goal is to provide short-term assistance, these commitments can extend beyond the expected timeframe depending on market conditions.

Approaching mortgage renewal with co-signers? Speak with your licensed mortgage broker to assess your equity position, income qualifications, and available options, including Marathon Mortgage products. Early evaluation, ideally 120 to 180 days before maturity, provides time to explore strategies and make informed decisions.

Disclaimer: Information in this article is for general educational purposes only and does not constitute financial or legal advice. Marathon Mortgage products are available through licensed mortgage brokers. All terms, conditions, and eligibility criteria apply. Rates and policies are subject to change without notice. Speak with your licensed mortgage broker to determine the best mortgage solution for your specific circumstances.