When a Mexican employer asks me, "How much does this really hit me?", the short answer is: it depends on the sector. The reform to move from 48 to 40 hours per week does not affect everyone equally. An office with a 9-to-6 schedule gets a scratch; a taco shop open from Thursday to Sunday or a maquila with three rotating shifts has its payroll turned upside down. Let's go sector by sector, with real figures from INEGI and the National Occupation and Employment Survey (ENOE), so that everyone knows where they stand.