...their financial situation and because they were afraid that even with the evidence they wouldn't be able to sack the employee. "Some of them don't think it's worth carrying out an investigation when it is going to cost them money and may not even lead ... These investigations are billed by the hour. They need careful planning, an analysis of needs and the preparation of a budget. "A work-related investigation lasting two or three days can cost between 1,000 and 2,500 euros," says Rojas.