The phrase 'A Penny Saved is a Penny Earned' means that it is as useful to save money that you already have as it is to earn more.
Example of Use: "I'm going to give you $20, but I want you to put it in the bank; a penny saved is a penny earned!"
Almost everyone has heard of this famous expression. Unlike many others, the origin of the idiom 'a penny saved is a penny earned' is well known – it comes from Benjamin Franklin’s book, Poor Richard’s Almanack. Interestingly, this successful series of books which was filled with advice, household hints, and amusing puzzles, also contained numerous witty phrases such as the one in question; like it, many of them are still in use today.