Getting used to coordinate with someone regarding your spending can take some getting used to, but communication about spending and saving is critical to the financial success of a marriage. Even if you decide to keep your finances separate, you will need to discuss how to handle joint expenses, and how you will contribute to savings for your future. Also make sure that you decide on the definition of a ‘big expense’ – a purchase amount that must be discussed and agreed to by both of you. Usually there isn’t a problem spending $20 or even $50, but $1,000 is definitely something that most couples would agree to discuss.