Cooked ground beef is safe to eat after five days in the fridge. The United States Department of Agriculture recommends throwing away ground beef that has been stored in the fridge for more than two days, but this is only a food safety guideline and not a hard-and-fast rule. If your cooked ground beef smells fresh and doesn't have any signs of spoilage, it's probably still safe to eat. However, if you're unsure whether or not your ground beef is still good, it's always better to err on the side of caution and throw it away.