A recent survey from Experian, a credit tracking firm, has found that more than one third of newlyweds are unaware of their partner's spending habits, while another third were surprised by their spouse's financial situation, according to Bloomberg. That's not the only finding that shows many couples are not thoroughly discussing their finances before getting married. Only 40 percent knew their spouse's credit scores going into the marriage while 44 percent didn't consider how their partner's credit score could affect their own finances. Many couples are also not discussing debt: 31 percent said they didn't know how much their partner owed in student loans. 

The survey also found that men and women have different opinions for when to keep their partner in the loop. While both would discuss major purchases with their spouse, what exactly counts as a major purchase differed. Men would spend $1,259 before talking about it with their spouse, while for women it was $383. Men were also more likely to keep financial accounts secret from their spouses, at 20 percent, than women, 12 percent. 

The findings are based on a survey of 1,002 U.S. adults married in the last year.