- 40% of respondents said they don't trust their partner to manage their combined finances.
- 38% said they were barely aware of their significant other's debts.
- 21% said they sometimes hide their spending from their significant other.
- 43% of newlyweds don't follow a family budget.
NEW YORK ( TheStreet) -- The road to retirement is tough enough without having to pull over to fight about money and budgets. But that's exactly what U.S. couples do regularly, fighting about money five times every year, according to investment firm TD Ameritrade ( AMTD). That comes out of the twice a year, or only twice per month, couples discuss money, said the Omaha, Neb., financial services giant in a survey released Thursday. "With the median age for first-time marriages approaching 30, combining finances is not as simple as it once was," said Carrie Braxdale, a managing director of investor services at TD Ameritrade. "Couples are bringing more financial baggage into the relationship than ever before. They have 401(k)s, student loan debt, investments and even mortgages. So it's more important than ever for couples to talk about their finances and work together to develop a plan." It turns out couples may not focus on money once they're married -- at least until there's a problem -- but they sure do before they get married. While looks and personality trump money and potential earnings, according to the study, TD Ameritrade says "poor financial habits" are "undesirable" for men and women alike. Big red flags for men and women looking for a life partner: Things such as high credit card debt (65% of respondents); relying on parents for financial support (also 65%); and lack of motivation to get ahead (66%). Attitudes about money and debt can also take a negative turn once the knot is tied, according to the survey: