YES -- her credit score will be impacted, for better or for worse! Once you are married, inevitably your credit will be combined -- either as you co-sign for a mortgage, or perhaps even the electric utility bill or auto insurance or healthcare bills if you share health insurance. And if one of you has bad credit, it will impact everything from your ability to buy a home, to the price of auto insurance. That's why I always suggest that you exchange credit reports BEFORE tying the knot! (Easy to do -- go to www.AnnualCreditReport.com to get a free report from each of the three major credit bureaus; they should all be basically the same.) Nothing destroys respect -- a necessary ingredient in a successful marriage -- more than having credit problems impact your lifestyle.