Q&A: Co-signing a loan may affect credit score

Dear Liz: Despite having high credit card debt (about $35,000), which I am working hard to pay off, my FICO score is consistently over 765 and I have never been denied credit — until now. I was recently denied for a card because of “high debt to earnings” (I earn about $85,000 annually.) Could that be because I recently co-signed for a $15,000 education loan for my grandson? I trust him completely to pay off the loan, but is it now showing on my credit history as money owed even though it is not payable until after he graduates?

Answer: You’d need to check your credit reports to be sure, but it’s entirely possible the new loan is already showing up and affecting your scores. Your debt-to-income ratio was high even before adding this loan, though, so it’s not surprising that the credit card company balked.

It’s unfortunate that you weren’t clear about this when you co-signed, but you’re on the hook for that student loan every bit as much as your grandson is. If he misses a single payment, you could see your credit scores lose 100 points or more overnight.

If you want to protect your credit scores and have the opportunity to get good credit card deals in the future, continue to pay down your debt. Also, consider making the payments on the education loan yourself and having your grandson reimburse you. That’s really the only way to make sure a missed payment won’t torpedo your scores.