Thinking about buying a new car? Before you sign on the dotted line, make sure you're not driving your finances off a cliff. The 20/4/10 rule is a simple, smart guideline to help you choose a car that fits your budget—not just your dreams. In this post, we break down what the rule means, why cars are depreciating assets, and how to make a confident, financially sound purchase that won’t leave you with buyer’s remorse.