As an individual you are free to do as you wish, however some experts believe that couples should not keep their finances separate – if they want to be happy that is. Studies are showing that couples who keep their money separate are less happier than those who shared their money. One partner should not be in complete control of all the money either.
You don’t have to share every account. But, sharing at least one can make a big difference in the relationship. Consider opening a joint bank account.