Running payroll in Mexico means operating inside one of Latin America's most institutionalised employment systems. Every employer registers with IMSS, the Mexican Social Security Institute, which by its own figures counts more than a million affiliated employers and tens of millions of registered jobs; contributions fund health care, pensions and social protection under the Social Security Law. On top of federal social security sit state payroll taxes and a set of statutory pay elements, the year-end bonus among them, that have no exact equivalent in US or UK payroll. An employer of record absorbs all of this for a company without a Mexican entity; this page sets out what it is absorbing.
The institutions: IMSS, INFONAVIT and the SAT
IMSS, founded in 1943, is the anchor: employers register with it, report wages and pay social insurance contributions that cover health care, disability, retirement savings and other risks defined in the Social Security Law. Alongside it, payroll interacts with the housing fund system and with the SAT, the federal tax administration, which collects the income tax employers withhold from wages. In practice a Mexican payroll run is a set of filings to these institutions on fixed calendars, and the operational risk is less the rates than the registration hygiene: workers must be enrolled with their correct wage base, and wage changes must be reported, because contribution assessments and workers' benefit entitlements both key off the registered figure.
Contributions, caps and state payroll taxes
Social security contributions in Mexico are split between employer and employee, with rates that vary by insurance branch and by the employer's occupational risk class, all assessed against wage bases capped at multiples of the UMA, the official inflation-indexed unit. Per PwC's Mexico tax summary, the employee side is withheld at source and reaches an annual maximum of MXN 29,103, while the employer side runs to an annual maximum of around MXN 227,286 for a low-risk company and rises with the occupational risk premium of the business activity. Separately, most Mexican states levy their own payroll tax on employers; Mexico City charges 4% of payroll, deductible as a business expense. A quote for a Mexican hire that shows only gross salary is therefore missing several real lines.
Statutory pay elements: aguinaldo, vacation premium and profit sharing
Mexican compensation includes statutory elements beyond monthly salary. The aguinaldo is a year-end bonus every employee receives; a vacation premium tops up pay taken as holiday; and PTU, statutory profit sharing, distributes a share of employer profits to staff annually. The tax system recognises all three: per PwC, employees can exclude from taxable income an amount equal to 30 days of UMA for the year-end bonus and 15 days of UMA each for the vacation premium and profit sharing. For budgeting, the practical point is that annual cost in Mexico is materially higher than salary times twelve, and the extra lines are legal obligations, not perks a foreign employer can decline. An EOR quote should show each one itemised.
EOR versus your own Mexican entity
Incorporating in Mexico, registering with IMSS and the SAT, and standing up compliant payroll is entirely doable and is the right call at scale, particularly for manufacturing operations with large headcount. For a company hiring a handful of remote professionals, an employer of record compresses months of setup into days: the EOR's Mexican entity holds the employment contract, runs the IMSS and tax filings, pays the statutory bonuses on the statutory calendar and invoices one monthly total. The crossover logic is the usual one: per-employee EOR fees against the fixed cost of an entity you must maintain regardless of headcount, plus the value of being able to leave the market as easily as you entered it.
Questions people ask about payroll in mexico
What does an employer register for in Mexico?
At minimum: IMSS for social security, the housing fund system, the SAT for tax withholding, and the payroll tax of each state where it employs people. An EOR carries these registrations through its own Mexican entity.
Are Mexican social security contributions capped?
Yes. Contribution wage bases are capped at multiples of the UMA unit; per PwC's summary, employee contributions max out at MXN 29,103 a year and employer contributions at around MXN 227,286 for low-risk companies, more in higher risk classes.
What is the aguinaldo?
The statutory year-end bonus paid to every Mexican employee in December. Together with the vacation premium and statutory profit sharing, it is one of the pay elements that make Mexican annual employment cost more than twelve months of salary.
Do all Mexican states charge payroll tax?
Most levy one on employers at modest rates; Mexico City's is 4% of payroll. The applicable rate depends on where the employees are, which is why quotes should name the state.