Fair warning - there may be valid reasons for maintaining separate accounts 

• Financial Independance
• Couples with differing financial priorities

But... Studies show overwhelmingly that maintaining a single joint account dramatically increases marital happiness and unity. These marriages last longer. Arguments for newlywed couples to maintain a single bank account are rooted in fostering trust, improving financial transparency, and enhancing relationship satisfaction. Here are key points supported by studies:

Strengthened Relationship Satisfaction

Research from the UCLA Anderson Review highlights that couples who pool all their finances into a joint account report higher levels of happiness and relationship satisfaction compared to those who keep separate accounts. The study suggests that sharing finances fosters a sense of togetherness and shared goals, which are crucial for a successful marriage.

Improved Financial Transparency

A study from Indiana University found that couples with joint accounts experience fewer conflicts over money and feel more aligned in their financial goals. By merging finances, couples can openly discuss their spending habits, savings plans, and financial priorities, reducing misunderstandings and promoting teamwork.

By maintaining a single bank account, newlyweds can build a strong foundation of trust, unity, and financial harmony, setting the stage for a successful and fulfilling marriage.

Other research that we found that didn't make the article

One Key to a Happy Marriage? A Joint Bank Account

Examining the Relationship Between Financial Issues and Divorce

Common Cents: Bank Account Structure and Couples’ Relationship Dynamics