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. Starting January 1, 2027, the legal workweek also drops from 48 to 46 hours. (Peso figures convert at 18.33 MXN/USD, ECB reference rate via Frankfurter, October 13, 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 (article 87), prorated for partial years; in 2026 the 20th is a Sunday, so the practical deadline is Saturday, December 19. It accrues from day one, so even a mid-year hire is owed a portion. At the Talentosy Salary Index developer median of $55,500 MXN a month (≈ $3,050 USD, active listings as of October 13, 2026), 15 days is $27,750 MXN (≈ $1,500 USD). Dates, proration and tax treatment are in when the aguinaldo is paid and how to calculate it.

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. Violating the vacation rules of article 76 carries fines of 50 to 250 UMA under article 994, or $5,865.50 to $29,327.50 MXN (≈ $300 to $1,600 USD) at the 2026 UMA of $117.31 MXN a day. The day-by-tenure table is in Mexico's vacation premium explained.

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, owed under article 50 when the employer refuses reinstatement and routinely included in negotiated settlements.
• 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.

What changes in Mexico labor law in 2027?

The biggest 2027 change in Mexico labor law is the shorter workweek: the reform published in the Diario Oficial on May 1, 2026 lowers the weekly maximum to 46 hours on January 1, 2027, then 44, 42 and 40 hours by 2030, without allowing pay cuts. At the Talentosy Salary Index national median of $34,500 MXN a month (≈ $1,900 USD), the cost per scheduled hour rises 4.3% in 2027. Employer retirement contributions also keep rising each January until they reach 11.875% of covered salary in 2030 (Social Security Law, art. 168). The budget impact is modeled in the Mexico payroll 2027 budget guide.

What does Mexican law say about hiring discrimination?

Mexican law prohibits refusing to hire anyone because of ethnic or national origin, gender, age, disability, health, religion, sexual preference or marital status, and bars requiring a non-pregnancy certificate (LFT art. 133, sections I and XIV). US interview habits mostly comply, but Mexican résumés often include age, photo and marital status by custom; keep them out of the decision and score only job criteria, as described in interview scorecards for structured hiring in Mexico.

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.