Not much. Huge amounts of credit card debt from funding your wedding and your honeymoon may harm your credit scores, but the act of getting married will not. Nothing automatically changes on your credit reports when you get married, so nothing should impact your credit scores. If you change your name after you are married and report this change to your creditors, you will see some updates to your existing credit reports. Along with your old name, your new name will be listed as an alias. You will not have to start from scratch with a new credit history. Your spouse’s past credit history has no impact on your credit profile. Only when you open a joint account will any information be shared on both of your credit reports. However, when you want to buy a home together, your spouse’s negative credit history could impact your mortgage rates. You should work together to improve your sweetheart’s credit if you are planning for a major purchase. Marriage doesn’t automatically make you an authorized user or co-signer on your spouse’s accounts.