Studies have shown that financial infidelity is on the rise, and can range from lying about small purchases, an amount of debt, or even hiding entire bank accounts. Many people put aside money for seemingly good intentions, but a lack of transparency can cause tension in a relationship, leading to mistrust, arguments and even divorce. When combining finances with a significant other, you form an agreement to manage financial issues together. It is important to open up, start a conversation, and form a financial plan. This does not mean you have to constantly monitor each dime you both spend, but you must agree upon a budgeting and money management system that works for both of you. A threshold amount must also be set, outlining how much you are allowed to spend without each others approval. If you fail to plan, then your financial plans will fail.