Is cooked hamburger meat safe to eat after a week?

Cooked hamburger meat is not safe to eat after a week, even if it has been refrigerated. According to the United States Department of Agriculture (USDA), cooked ground beef should be consumed within three to four days of cooking, and cooked leftovers should be consumed within two to three days. After this time, the meat can become contaminated with bacteria that can cause foodborne illness.