Help! My Partner Makes More than Me!
Even successful relationships can sometimes have problems when money becomes an issue.
Some couples make the mistake of not talking about their finances. Others have trouble when one person has less financial discipline than the other, or conversely when one member of the couple moves from "conservative" to "cheap" when it comes to spending.
Another huge possible trap for couples involves how much each person makes. This can be an even bigger problem if both people once made comparable salaries and something happens that causes one person to start making a lot more.
Source: Fool.com