What Is a Third Mortgage and How to Get One?

While most homeowners are familiar with first and second mortgages, third mortgages are lesser-known tools that can offer short-term financial relief in specific situations. In Ontario’s increasingly expensive housing market, a third mortgage can help access much-needed funds—but it comes with significant risks. Here’s what you need to know, and how a mortgage broker can help you use this strategy wisely.

💬 What Is a Third Mortgage?

A third mortgage is a loan that’s secured against your property behind your first and second mortgages. This means it is in third position on title, which increases the lender’s risk. Because of that, third mortgages usually come with:

  • Higher interest rates (often 10%–15% or more)
  • Shorter terms (6–24 months)
  • Interest-only payments
  • Private lender involvement

In Ontario, third mortgages are usually offered by private lenders through mortgage brokers and are used when traditional financing is no longer available.

🔍 When Would You Need a Third Mortgage?

Third mortgages are typically used as a last resort when homeowners:

  • Are already carrying a first and second mortgage
  • Can’t qualify for a refinance or HELOC due to low credit or income
  • Need immediate cash to stop a power of sale or foreclosure
  • Need funds for business capital, legal fees, medical emergencies, or debt consolidation
  • Are in a temporary situation and have a clear exit plan (e.g., selling the home or refinancing soon)

⚠️ Risks to Consider

Because a third mortgage adds another layer of debt and sits in the last position, the risk of losing your home increases if you fall behind.
You’ll also face:

  • Higher lender and broker fees
  • Legal and appraisal costs
  • Limited lender options
  • Very short timeframes to repay or refinance

This is not a long-term solution, and should only be used with professional guidance and a strategy to exit the loan.

🧑‍💼 How a Mortgage Broker Can Help

Most third mortgage lenders only work through licensed mortgage brokers. Here’s why using a broker is critical:

  • Access to Private Lenders: Brokers maintain relationships with a network of private lenders who are open to high-risk, third-position loans.
  • Negotiation Power: A broker can negotiate terms, rates, and fees on your behalf to minimize costs.
  • Structuring the Deal: They know how to package your application to highlight equity and repayment ability—even if your credit is poor or your income is non-traditional.
  • Exit Strategy Planning: Brokers will help you plan your next steps—whether that’s selling the property, refinancing later, or consolidating debt to move back to an A or B lender.
  • Speed and Compliance: In urgent situations, like stopping a power of sale, brokers can arrange funding within days while ensuring everything is compliant with FSRA and Ontario lending regulations.

✅ Final Thoughts

A third mortgage can be a financial lifeline—but it’s not for everyone. Used carefully, it can buy you time, access emergency funds, or resolve serious issues without selling your home. But because of its high cost and risk, it should always be approached with a clear plan, professional advice, and expert negotiation.

A licensed mortgage broker is not just helpful—they’re essential. They’ll guide you through lender selection, structure the deal to protect your equity, and help you transition back to more affordable financing when the time is right.

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Ksenia Bichek

I'm a licensed Ontario mortgage agent & realtor, and Lead Writer at FinanceVine. I create educational content about mortgage, real estate, and insurance. Reach me at: [email protected].