Will co-signing my child’s mortgage reduce my own borrowing power?

The problem families discover too late

Parents help with today’s purchase, then apply for their own refinance or investment property next year. Their lender counts the child’s mortgage and their qualification drops, even though the child has made every payment.

A practical Ontario example

A parent co-signs a $700,000 mortgage and later wants a home-equity line. Twelve months of payments from the child’s account may help with some lenders, while another lender may still include the full obligation. The original promise that it “won’t affect you” was too broad.

How A, alternative/B and private routes may differ

• A lender: may apply its own contingent-liability or debt-servicing treatment and ask for payment history.
• Alternative/B lender: may use broader income and debt analysis when the parent’s new A-lender application does not fit.
• MIC/private lender: may provide short-term equity financing, but using expensive financing to repair an avoidable co-signing problem needs a clear exit.

Policy boundary: Each lender and mortgage insurer sets its own borrower, guarantor, gift, debt-service and title requirements. FCAC explains consumer rights and general mortgage concepts; it does not set individual lender underwriting policy.

Questions the family should answer

• Do I expect to borrow before the child can qualify alone?
• How will the selected lender treat this debt later?
• Who will make payments and from which account?
• Could my retirement income or renewal timing change the exit?

Rajiv’s practical view

Test the parent’s next mortgage plan before adding them. Helping the child should not quietly remove the parent’s ability to refinance, move or handle an emergency.