It makes me laugh, but also a little sad, to see the Mexican employer who walks into a meeting with their accountant and comes out saying "oh, it's just 8 little hours, it's no big deal." It is a big deal. It's a huge deal. And most of the SME owners I know in CDMX, Guadalajara, and Monterrey haven't done the math conscientiously. Here I break it down for you step by step, with a conceptual simulator that anyone can run in an Excel sheet, without fiscal firm terminology, and with numbers you will recognize on your payroll.