SunTrust Bank did a survey that found the leading cause of fights in a relationship is over...dun dun duuuun FINACES. Some 35 percent of all respondents experiencing relationship stress said money was the primary cause of friction. (Annoying habits came in second, at 25 percent.) Among respondents with relationship stress aged 44 to 54, 44 percent said money was the primary cause.
Money and stress do seem to go hand in hand for many Americans, whether they're in relationships or not. Money Is The Leading Cause Of Stress In Relationships