Liz Weston

Dear Liz: Thanks for your recent column about how credit scores react to heavy credit card usage. We pay our credit cards in full each month but recently we had big charges on three cards for vacations, home supplies and other purchases. I am the primary account holder on all three cards and my credit scores tanked! I even got email warnings about it from my credit monitoring service.

I have paid off two of the cards and will pay off the third one soon. My husband has one credit card in his own name that he occasionally uses and he is an authorized user on the others. I have always been the fanatical financial partner so he thinks it’s funny he has great scores and I look like a loser! Good thing we were not planning to do a house purchase or refinance the mortgage.

Answer: Pretty soon your husband will have to find something else to tease you about. Your scores are likely to return to their previous levels once the high balances are paid off and you return to your normal spending habits.

Many people are surprised by how dramatically credit scoring formulas react to the amount of available credit they’re using. But this knowledge can help you the next time you’re planning to get a major loan.

For example, you could throttle back your credit card usage starting a couple of months before your application. Alternatively, you could make weekly payments instead of monthly ones to ensure the balances reported to the credit bureaus, and used in your scores, are as low as possible.

Another approach is to pay off your balance a few days before the statement closing date, since the balance on that date is the one that’s typically reported to the bureaus. (If any charges show up after you’ve paid off the balance, you’ll need to make a second payment before the due date to avoid late fees.)