Mexico shares time zones with the United States, has a deep pool of engineers and a well-developed nearshoring industry. Its payroll system is more complex than most: employer contributions are split across several social security branches, many are capped, and one of them rises every year until 2030. For a mid-level developer, employer contributions come to about 25.9% of base salary in 2026.
The building blocks: SBC and UMA
Contributions are charged on the integrated daily salary (SBC), which includes not just base pay but also the aguinaldo and vacation premium. Most contributions are capped at 25 UMA per day. The UMA (Unidad de Medida y Actualización) is a reference value published by INEGI; in 2026 it is MXN 117.31 per day, so the cap is about MXN 1.07 million a year.
Employer contributions in 2026
| Contribution | Employer rate |
|---|---|
| IMSS sickness & maternity — fixed fee | 20.40% of one UMA per day |
| IMSS sickness & maternity — surplus above 3 UMA | 1.10% |
| IMSS cash benefits | 0.70% |
| IMSS pensioners’ medical expenses | 1.05% |
| IMSS disability & life | 1.75% |
| IMSS childcare & social benefits | 1.00% |
| IMSS work-risk premium (office work, class I) | ≈0.54% |
| Retirement (SAR) | 2.00% |
| Severance & old age (CEAV) | 7.513% |
| INFONAVIT housing fund | 5.00% |
| State payroll tax (ISN) | 1–4% depending on the state |
Why CEAV keeps rising
The 2020 pension reform increases the employer’s severance and old-age (CEAV) contribution every year. For salaries above 4.01 UMA per day, the rate is 7.513% in 2026 and reaches 11.875% in 2030. Lower salary bands rise more slowly. If you are budgeting a multi-year team, expect Mexico’s employer cost to climb by about one percentage point a year.
Mandatory benefits
- Aguinaldo: a year-end bonus of at least 15 days’ salary, paid by 20 December.
- Vacation: at least 12 paid days in the first year, rising by two days a year to 20 days, then by two days every five years.
- Vacation premium (prima vacacional): at least 25% of vacation-day pay.
- Profit sharing (PTU): employers with a Mexican entity share 10% of pre-tax profits with employees, capped per employee.
Worked example: $38,000 a year
| Item | USD |
|---|---|
| Base salary | $38,000 |
| Aguinaldo + vacation premium | $1,874 |
| Employer contributions (≈25.9%) | $9,829 |
| True employment cost | $49,703 (+30.8%) |
Calculate a Mexican developer’s true cost
The outsourcing reform and contractors
Since 2021, Mexico bans subcontracting personnel except for specialised services registered with the labour ministry (REPSE). Disguised employment — a full-time “contractor” who works like an employee — exposes the company to IMSS assessments, PTU and constitutional severance. Genuine contractors invoice under the RESICO or business-activity tax regimes with CFDI electronic invoices, and exports of services can be zero-rated for VAT.