Mexico Labor Laws Every US Employer Must Know

US employers hiring in Mexico must comply with the Ley Federal del Trabajo, which sets non-negotiable minimums: a Christmas bonus (aguinaldo) of at least 15 days' salary, profit sharing (PTU) of 10% of taxable profit, a vacation premium of at least 25%, mandatory IMSS social-security contributions of roughly 20-30% of payroll, and severance of 3 months' salary plus 20 days per year for dismissals without justified cause. These are floors, not options — and misunderstanding them is where US companies get exposed. (Peso figures convert at 17.42 MXN/USD, July 2026.)

Aguinaldo: the mandatory year-end bonus

The aguinaldo is not a discretionary bonus like a US year-end payout. Under the Federal Labor Law, every employer must pay at least 15 days of salary before December 20, prorated for partial years. It accrues from day one, so even a mid-year hire is owed a portion. On a developer median of $61,500 MXN/month (≈ $3,550 USD), 15 days is roughly $30,750 MXN (≈ $1,750 USD).

PTU: profit sharing is a legal obligation

Mexico requires companies to distribute 10% of taxable profit to employees as PTU (participación de los trabajadores en las utilidades), capped at three months' salary or the average of the last three years' PTU, whichever is higher. New companies in their first year and a few specific categories are exempt, but for most employers it's a real annual liability that has to be budgeted, not an afterthought.

Vacation and the vacation premium

Since the 2023 reform, workers get 12 vacation days in year one, rising with tenure — a major change from the previous 6-day floor. On top of paid vacation, employers owe a vacation premium of at least 25% on those days' wages. This premium is one of the items US employers most often overlook when modeling cost.

IMSS: social-security contributions

Employers must register with IMSS as a patrón and pay contributions covering health, disability, retirement, and housing funds. In practice these run roughly 20-30% of payroll, varying with salary level and the company's risk class. Combined with aguinaldo, PTU, and the vacation premium, plan for a fully loaded cost near 1.25-1.35x the base salary — detailed in our payroll cost breakdown.

Termination: severance is expensive if done wrong

This is the single biggest trap for US employers. Mexico is not employment-at-will. A dismissal without justified cause triggers:

• 3 months' salary as base indemnity.
• 20 days of salary per year of service.
• A seniority premium and any accrued finiquito (pro-rated aguinaldo, vacation, and premium).

"Justified cause" is narrowly defined by law and must be documented. Firing someone the US way — without cause, on short notice — creates real liability. Structuring contracts and performance documentation correctly from the start is far cheaper than litigating a wrongful termination later.

Employee vs. contractor: classification matters

Mexican law weighs the substance of the relationship, not the label on the contract. A worker who is economically dependent, follows your schedule, and uses your tools is likely an employee regardless of how you paper it. Misclassifying a de-facto employee as a contractor creates back-pay, benefit, and IMSS liabilities. The safer path for ongoing work is direct employment or an Employer of Record.

How US employers stay compliant

• Treat the mandatory line items as fixed inputs — aguinaldo, PTU, vacation premium, and IMSS are not negotiable.
• Budget the loaded cost at ~1.25-1.35x base from day one.
• Document performance so any termination can meet the "justified cause" bar.
• Use an EOR or local partner if you don't have a Mexican entity or in-house HR expertise.

Getting compliance right is a competitive advantage, not just risk management — it lets you offer the stable, benefits-rich packages that attract Mexico's best talent. Our nearshore recruitment service and local recruitment team help you build compliant teams, and our salary data keeps your offers benchmarked to the market.