Before You Co-Sign or Guarantee a Mortgage: What to Actually Ask

You are liable for the entire mortgage debt, not a percentage of it, if the primary borrower can't pay — a co-signer or guarantor isn't backing 'their share,' they're backing the whole thing. Confirm you genuinely understand and can absorb that risk before agreeing.

The debt shows up on your credit report and counts against your own debt ratios immediately, whether or not the primary borrower ever misses a payment — this can meaningfully affect your own ability to qualify for financing (a car loan, your own mortgage) for as long as you remain on the agreement.

Ask specifically how and when you can be removed from the mortgage — some lenders allow the primary borrower to requalify solo and remove a co-signer or guarantor after a period of good payment history; others don't make this easy. Understand this before signing, not after you want out.

Have a candid conversation about what happens if the primary borrower's situation changes — job loss, relationship breakdown, missed payments — and consider getting independent legal advice before signing, especially for larger amounts or more complex family situations. This is a genuine financial and legal commitment, not an informal favour.