Theft in the workplace is a major problem. According to the Global Retail Theft Barometer employee theft costs American businesses even more than theft by non-employees. Employee theft made up 43% of all lost inventory for American businesses in 2015. That’s an annual cost of roughly $18 billion. It’s $2.3 billion more than the cost of theft by customers. Most of the theft that occurs isn’t an employee taking items and walking out of the store with them.