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Co-signers and Guarantors: When and How to Use Them

Monika Tarnik-Jedrusiak Monika Tarnik-Jedrusiak
September 15, 2024
7 min read
Updated May 13, 2026

Getting help from family to qualify for a mortgage is common, especially for first-time buyers. But there's more than one way to do it. Understanding the difference between co-signers and guarantors—and the implications of each—helps you make the right choice.


Co-signer vs. Guarantor: The Difference

Co-signer (Co-borrower)

  • Goes on title (owns part of the property)
  • Fully responsible for the mortgage
  • Their income and credit factor into qualification
  • Their name appears on all mortgage documents

Guarantor

  • Does NOT go on title
  • Guarantees payment if borrower defaults
  • May not be income-tested as heavily
  • Less involvement in the purchase

When You Might Need Help

Common scenarios where family assistance helps:

  • First-time buyers with limited income history
  • Self-employed borrowers with complex income
  • New Canadians without established credit
  • High debt ratios that need additional income
  • Credit challenges requiring a stronger applicant

How Co-signing Affects the Helper

If you're considering co-signing for someone:

Impact on credit:

  • The mortgage appears on your credit report
  • Affects your debt-to-income ratio
  • May limit your own borrowing capacity

Risk:

  • Fully responsible if primary borrower can't pay
  • Your credit damaged if payments are missed
  • May need to take over payments or face foreclosure

Considering a Co-signer or Guarantor?

Let's discuss your options and find the best approach for your situation.


Removing a Co-signer Later

Yes, it's possible, but requires refinancing:

  • Primary borrower must qualify independently
  • Typically done after income improves or equity builds
  • May involve refinancing costs

Timeline: Plan for 2-3 years before attempting removal.


Alternatives to Co-signing

Before involving family, consider:

  1. Larger down payment – Reduces amount needed to qualify
  2. Gift for down payment – Help with money, not obligation
  3. Wait and build credit – Sometimes patience is the answer
  4. Alternative lenders – More flexible qualification

The Emotional Side

Co-signing involves more than money:

  • Family relationships can be strained
  • Clear expectations should be set
  • Consider what happens if circumstances change
  • Legal advice is worth the cost

What's Next

Explore your options with our team. We can help determine whether a co-signer or guarantor is the right approach—or if there are alternatives you haven't considered.

Ready to Get Started?

Contact us today for personalized mortgage advice and competitive rates.

Frequently Asked Questions

Let's discuss your options and find the best approach for your situation.
A: Yes, but their mortgage affects their ability to help. Lenders consider their total obligations.
A: Typically yes. Most lenders require immediate family (parents, siblings, grandparents).
A: Yes. The co-signer helps with income/credit qualification, not down payment.
A: The mortgage continues, but you may need to refinance depending on terms and your qualification.