The reform to move from 48 to 40 hours per week has been circulating in the Chamber of Deputies for years and now has a gradual implementation date. If you run an SME, a restaurant, a maquila, or a call center, this change is going to hit your pocket and your payroll. Here we discuss it in plain language and without beating around the bush: what is changing, when, and how to prepare before the employer is left staring at the computer screen at 11 p.m. scrambling to put together shifts.