How to Terminate an Employee Legally in Mexico

Terminating an employee in Mexico is one of the highest-risk actions a foreign employer can take. The Federal Labor Law (Ley Federal del Trabajo, or LFT) is built to protect workers, and the financial exposure for getting the process wrong is substantial.

This guide walks through every step a US company needs to take to execute a legal termination in Mexico, from the initial decision through final IMSS deregistration.

Key Takeaways

Mexico Does Not Allow At-Will Termination

The first thing US employers need to understand is that Mexico operates nothing like the US employment model.

In the US, at-will employment allows either party to end the relationship at any time for almost any reason. Mexico has no equivalent. The LFT establishes what is called the job security principle (principio de estabilidad en el empleo), which presumes every employment relationship is indefinite and protected.

An employer who terminates without a recognized legal cause does not simply pay a small severance. They owe a full constitutional severance package called liquidación, which can represent three to six months of salary or more depending on tenure.

Understanding this before any termination decision is made is the difference between a controlled exit and a labor tribunal dispute.

The Two Types of Termination in Mexico

Every termination in Mexico falls into one of two categories, and which category applies determines exactly what the employer owes.

Justified Termination (Despido Justificado)

A justified termination happens when the employer invokes one of the specific legal grounds listed in LFT Article 47. When justified cause exists and is properly documented, the employer avoids paying the full liquidación severance.

The employee still receives their finiquito (accrued benefits settlement) regardless of cause. What they lose is the constitutional indemnification.

Unjustified Termination (Despido Injustificado)

An unjustified termination is any dismissal that does not meet Article 47 grounds, or where just cause exists but the employer fails to prove it. It also includes situations where the employer claims just cause but cannot produce adequate documentation.

When a termination is unjustified, the employee chooses between two options:

• Reinstatement to their position with full back pay

• Full liquidación severance package

The choice is the employee's, not the employer's.

LFT Article 47: The 15 Just Cause Grounds

Article 47 of the LFT lists the only recognized grounds for justified termination. If the reason for dismissal does not fit one of these, it will be treated as unjustified.

Each cause must be documented at the time of the incident. A verbal warning or undocumented reprimand is not enough to support a justified termination later.

The 30-Day Just Cause Forfeiture Rule

This is the rule that catches most foreign employers off guard.

Even when a valid Article 47 cause exists, the employer has only 30 days from the date they knew or should have known about the conduct to invoke that cause and issue the termination notice.

Miss the 30-day window and the just cause is legally forfeited. The termination automatically becomes unjustified, and the full liquidación becomes payable regardless of how serious the employee's conduct was.

Practical implication: Document every incident on the day it occurs. Do not wait weeks to investigate or consult legal counsel before issuing notice. The clock starts running the moment the employer is aware of the conduct.

The Carta de Rescisión: What It Must Contain

For a justified termination to hold up legally, the employer must issue a carta de rescisión (rescission letter) to the employee on the day of termination. This is not optional and not interchangeable with a simple termination letter.

A legally valid carta de rescisión must include:

• The employee's full legal name and job title

• The specific Article 47 fraction(s) being invoked, quoted verbatim

• A factual description of the specific conduct or incidents

• The exact date(s) of the incident(s)

• The date of termination

• The employer's legal name and authorized signature

• Delivery confirmation (in-person is required when possible; if the employee refuses to receive it, the employer must register it with the labor court within 5 days)

If the carta de rescisión is missing any of these elements, a labor court will likely treat the termination as unjustified. The document is the employer's entire defense in a dispute.

Constructive Dismissal: The Trap Most US Employers Don't See Coming

Constructive dismissal (despido indirecto or despido equiparado) is one of the most expensive mistakes foreign employers make in Mexico, and it is almost entirely absent from English-language guides on this topic.

Under LFT Article 51, an employee can resign and still claim full liquidación severance if the employer commits any of the following acts:

• Reducing the employee's salary without consent

• Changing the employee's working conditions, hours, or location without agreement

• Failing to pay wages on time

• Requiring the employee to perform tasks not covered by their contract

• Subjecting the employee to harassment, mistreatment, or unsafe conditions

When an employee resigns citing these conditions, the resignation is treated legally as a termination initiated by the employer. The full constitutional severance becomes payable.

What this means for US companies: Restructuring roles, changing remote work arrangements, reassigning territories, or delaying payroll runs can all trigger a constructive dismissal claim even when the employee technically resigns. Always consult a Mexican employment attorney before making any change to an employee's working conditions.

Finiquito vs. Liquidación: What You Owe in Each Scenario

These two payments are completely different, and confusing them is a common and expensive error.

Finiquito (Accrued Benefits Settlement)

The finiquito is owed in every termination scenario without exception, including justified dismissals and voluntary resignations. It covers everything the employee earned but has not yet been paid.

Finiquito always includes:

• Unpaid salary through the separation date

• Proportional aguinaldo (Christmas bonus) for the days worked in the current year

• Unused vacation days

• Proportional vacation premium (prima vacacional)

• Seniority premium (prima de antigüedad) — 12 days of salary per year of service, calculated on the SDI capped at twice the minimum wage, for employees with 15 or more years of service or in any involuntary separation

The finiquito must be calculated on the integrated daily salary (SDI), not the base salary. Using base salary alone underestimates the finiquito and creates liability.

Liquidación (Constitutional Indemnification)

The liquidación is only owed when the termination is unjustified, or when the employer cannot prove just cause. It is paid on top of the finiquito.

Liquidación formula:

• 3 months of integrated daily salary

• 20 days of salary per year of service only if reinstatement is legally refused or in specific collective terminations.

• Seniority premium (prima de antigüedad): 12 days per year, SDI capped at twice the minimum wage

Example: An employee earning MXN 18,000 per month (roughly USD 1,000) with 5 years of service dismissed without cause would be owed approximately:

• 3 months: MXN 54,000

• 20 days x 5 years: MXN 60,000

• Prima de antigüedad: MXN 7,200

• Total liquidación: approximately MXN 121,200 (roughly USD 6,733)

Plus the finiquito on top. For senior employees with 10 or 15 years of service, these numbers grow significantly.

Mutual Agreement Termination (Convenio de Rescisión)

In practice, most terminations in Mexico end in a negotiated mutual agreement rather than a contested dismissal. This is the route most experienced employers take, even when just cause exists.

A convenio de rescisión is a signed agreement between employer and employee that ends the relationship voluntarily and typically includes a negotiated severance payment. In exchange, the employee waives their right to challenge the dismissal.

For the convenio to be legally binding, it must be:

• Ratified before a labor conciliator (Centro de Conciliación) or labor court

• Signed freely by the employee without coercion

• Written in clear language the employee understands

A convenio ratified by a labor authority is legally final and bars any future claims arising from the employment relationship. A convenio signed only between the parties, without ratification, can still be challenged.

Why employers prefer this route: Even when an employer has solid just cause documentation, a labor tribunal process in Mexico can take 12 to 24 months. A negotiated settlement, typically somewhere between the finiquito alone and the full liquidación, ends the matter immediately and with certainty.

Step-by-Step: How to Execute a Legal Termination in Mexico

Step 1: Determine the Termination Type

Before taking any action, decide whether you have documented just cause under Article 47, whether this will be a mutual agreement, or whether the termination will be unjustified. This determines every step that follows.

Step 2: Build the Documentation File

For just cause terminations, gather every piece of evidence before issuing any notice: written warnings, incident reports, attendance records, witness statements, performance reviews. Every document should be dated and signed.

The burden of proof in any labor dispute falls entirely on the employer. If it is not in writing, it does not exist in a Mexican labor court.

Step 3: Calculate the Full Severance Exposure

Before approaching the employee, calculate the full liquidación amount the company would owe if the just cause is challenged and not upheld. This is your baseline risk figure and determines your settlement range in a convenio negotiation.

Use the Mexico severance pay calculator to run this number accurately before the conversation begins.

Step 4: Issue the Carta de Rescisión on Termination Day

For justified terminations, deliver the carta de rescisión in person on the day of termination. Include all required elements as described above.

If the employee refuses to sign or accept the letter, you have five business days to register the termination with the labor authority. Missing this window weakens your legal position significantly.

Step 5: Calculate and Pay the Finiquito Immediately

The finiquito is due on or before the separation date. This is one of the most commonly violated rules in Mexican employment law.

Paying the finiquito weeks after termination does not create a grace period. It creates a debt that accrues interest and can be used by the employee to support a claim that the termination was irregular.

Issue the finiquito as a CFDI de Nómina stamped through SAT. The payment must be documented electronically just like any regular payroll run. Understanding how CFDI works in Mexico is essential before running the final payment.

Step 6: File the IMSS and INFONAVIT Baja

Within five business days of the separation date, the employer must file the employee's deregistration (baja) with IMSS. Failure to file on time means the employer continues accruing social security contributions on a worker who no longer works for them.

INFONAVIT must also be notified. If the employee had an active INFONAVIT loan with deductions, the deductions stop only after the baja is filed.

The full structure of mandatory social security in Mexico explains what IMSS and INFONAVIT require from employers throughout and after the employment relationship.

Step 7: Issue Final Employment Documentation

The employee is entitled to a constancia de trabajo (letter of employment) upon request, confirming dates of service, position, and salary. This is separate from the carta de rescisión.

If the employee files their individual annual tax return (due April 30), they will need their annual withholding certificate. The annual individual tax declaration process in Mexico explains what documents employees need after separation.

Employee's Right to Challenge a Dismissal

Any employee who believes their termination was unjustified can file a claim with the federal labor courts (CEJUST, the Centro de Justicia Laboral). This replaced the old JFCA labor boards following Mexico's 2019 labor reform.

The process now begins with a mandatory conciliation stage before any formal claim is filed. An independent conciliator attempts to broker a settlement between the parties.

If conciliation fails, the employee files a formal lawsuit. The employer must then:

• Prove the just cause existed

• Prove the termination procedure was followed correctly

• Prove the carta de rescisión was properly issued and delivered

If the employer cannot prove all three, the termination is unjustified and the employee is entitled to reinstatement or the full liquidación, plus any back wages owed from the filing date.

Statute of limitations: The employee has two months from the date of separation to file a claim, per LFT Article 518.

Termination During Probationary Period

Mexico allows probationary periods of up to 30 days for most roles, and up to 180 days for managerial or technical positions requiring specialized knowledge.

During the probationary period, an employer can terminate without paying the full liquidación if the employee demonstrably fails to meet the performance standards or skills required for the role.

However, the termination must still be documented. A vague "not a good fit" determination will not hold up. The employer must show that specific, objective performance criteria were defined at the start of the probationary period and that the employee failed to meet them.

The rules around probationary and trial periods in Mexico are more specific than most foreign employers realize, and structuring them incorrectly voids the probationary protection.

Fixed-Term Contract Terminations

Employees on a definite-term (fixed) contract who are terminated before the end of their contract term are owed the full wages they would have earned through the contract's end date, plus the finiquito.

Early termination of a fixed-term contract is rarely cheaper than letting it run out. Before terminating early, calculate the remaining contract value and compare it to the full exposure.

Resignation with Just Cause by the Employee

An employee who resigns due to employer misconduct under LFT Article 51 is treated as if they were dismissed without cause. The employer owes the full liquidación.

Common triggers for employee-initiated rescission that US employers trigger unknowingly:

• Reducing salary or benefits without written consent

• Unilaterally changing remote work arrangements (especially relevant under NOM-037-STPS-2023)

• Requiring relocation without agreement

• Failing to pay wages by the contractual due date

• Any form of harassment or hostile treatment

This is the constructive dismissal trap described earlier. The employee does not need to wait to be fired. They can leave and immediately demand full severance.

The Most Costly Termination Mistakes US Companies Make in Mexico

Assuming documentation from the US works in Mexico. Performance improvement plans, email warnings, and verbal counseling notes are not automatically valid in a Mexican labor proceeding. Documents must be signed by the employee, dated, and in Spanish to carry weight.

Waiting too long after the incident. The 30-day just cause window is absolute. An undocumented incident three months ago cannot support a termination today.

Paying the finiquito late. Late payment of the finiquito creates liability independent of the termination itself. Pay on separation day, not the following payroll cycle.

Not filing the IMSS baja. Continuing to pay IMSS contributions after an employee has separated wastes money and creates reconciliation problems. File the baja within five days.

Changing working conditions before termination. Modifying salary, hours, or role to pressure an employee into resigning triggers constructive dismissal rights. This approach always costs more than a direct termination.

Issuing the carta de rescisión without legal review. A missing Article 47 fraction citation or an incorrectly described incident turns a documented just cause termination into an unjustified one. Have a Mexican employment attorney review the letter before it is issued.

How HRM Handles Terminations for Foreign Companies

Terminating an employee in Mexico while managing the carta de rescisión, IMSS baja, CFDI finiquito, labor court exposure, and potential convenio negotiation is complex for any foreign company operating without a local HR team.

At Human Resources Mexico (HRM), we manage the full termination process for the companies we serve:

• Termination risk assessment: We calculate the full liquidación exposure and advise on just cause viability before any action is taken.

• Documentation: All carta de rescisión letters are drafted in compliance with LFT Article 47 and reviewed before issuance.

• Finiquito calculation and payment: Calculated on the correct integrated daily salary, issued as a CFDI on separation day.

• IMSS and INFONAVIT baja: Filed within the five-day window for every separation.

• Convenio support: We facilitate negotiated separations and ensure ratification through the appropriate labor authority.

With 17 years of physical presence in Mexico, we have handled terminations across every industry and tenure level. The consequences of unjust dismissal in Mexico are serious and avoidable when the process is handled correctly from the start.

• Get a proposal for your Mexico team.

• Run the Mexico severance calculator to model your exposure before any termination decision.

• Get instant compliance answers through the Mexico EOR Specialist AI Chatbot.

Employee Termination Mexico FAQ

Does Mexico allow at-will employment?

No. Only employees can end the relationship at will. Employers must have documented just cause under LFT Article 47 or pay full liquidación severance.

What is just cause for termination in Mexico?

One of 15 specific grounds listed in LFT Article 47, including dishonesty, violence, absenteeism, drug use, and data theft. The cause must be documented and invoked within 30 days.

What happens if you fire someone without just cause in Mexico?

The employee chooses between reinstatement with back pay or full constitutional severance: 3 months salary plus 20 days per year of service plus the seniority premium, on top of finiquito.

What is finiquito in Mexico?

The accrued benefits settlement owed in every separation regardless of cause. It covers unpaid salary, proportional aguinaldo, unused vacation, vacation premium, and seniority premium where applicable.

What is liquidación in Mexico?

The constitutional indemnification owed only in unjustified terminations. It equals 3 months of integrated salary plus 20 days of salary per year of service only if reinstatement is legally refused or in specific collective terminations

How long does an employer have to invoke just cause in Mexico?

Exactly 30 days from when the employer knew or should have known of the conduct. After that, the just cause is forfeited and the dismissal becomes unjustified.

What must a carta de rescisión include?

Employee name, job title, the specific LFT Article 47 fractions cited verbatim, a description of the incident, the date, and the employer's authorized signature. Missing any element undermines the legal justification.

When must the finiquito be paid?

On or before the separation date. Late payment creates additional liability independent of the termination itself.

What is constructive dismissal in Mexico?

When an employer changes working conditions, reduces pay, or creates a hostile environment, the employee can resign and claim full liquidación as if dismissed without cause. It is called despido indirecto under LFT Article 51.

How do you file the IMSS baja after termination?

Through IMSS's IDSE platform or via your payroll provider within five business days of the separation date. Failure to file continues accruing social security contributions on a former employee.

Can employees be terminated during a probationary period?

Yes, without paying full liquidación, provided the employer documented specific performance criteria at the start and can show the employee failed to meet them.

What is a convenio de rescisión?

A negotiated mutual termination agreement that, once ratified by a labor authority, is legally final and bars future claims. Most experienced employers use this route to avoid labor tribunal proceedings.

What is the statute of limitations on termination claims in Mexico?

Two months from the date of separation, per LFT Article 518.