It's easy to ignore your credit score. After all, it's not something that comes up that often in day-to-day life. But, if you're thinking about buying a house, it's important to check yours sooner than later. Why? Well, according to one new analysis, it could save you money. Your credit score is among the factors that determines your mortgage rate, which then determines how much your monthly mortgage payment will be. A better credit score will get you a lower rate and a smaller mortgage bill, which will save you thousands of dollars over the life of your loan. In fact, the data showed a borrower with a credit score between 760 and 850 would pay nearly $300 a month less than a borrower with a score below 640 would for the same house. Over the life of a 30-year fixed-rate loan, that adds up to just over $100,000. In other words, a lot of money. That's why it's important for buyers to check their credit score early on in the home buying process. Knowing your score, and fixing any errors on your credit report, can potentially save you a lot of money on your mortgage.