For newlyweds, the first big financial decisions go beyond how to pay for the honeymoon and how to invest all those checks. They also involve starting a new household on solid ground financially. "Financial incompatibility is a primary reason for a significant number of failed marriages," said Lee Bowman, National Coordinator for Community Affairs. "Achieving harmony regarding financial matters before marriage, or as early in the marriage as possible, is critical to sustaining the relationship and preventing conflicts."