In 2013, 63 percent of divorce attorneys surveyed by the American Academy of Matrimonial Lawyers said they had seen an increase in the number of prenuptial agreements drafted in recent years. "As the financial and real estate markets continue to improve, there is a greater awareness of risk to possibly sharing these gains in a divorce," Alton Abramowitz, president of the AAML, said at the time in a news release.
Wealth is still a driving factor behind prenups, said Dubin, who also is the author of "Prenups for Lovers." A new report from Oxfam estimates the combined wealth of the world's richest 85 people is equivalent to that owned by half of the world's population. The "great wealth transfer" of assets from baby boomers and their heirs—expected to tally some $30 trillion over the next few decades—is also underway. "People have more property to protect than ever before," she said Monday at the American Institute of Certified Public Accountants' Advanced Personal Financial Planning Conference.
Read MoreWorld's richest have same wealth as 3.5 billion poorest
But prenuptial agreements aren't solely for the 1 percenters. These six factors are also becoming more influential among couples choosing to sign a contract before saying "I do."