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Authorization for the use of the business or corporate name  (1) expand_more expand_less
Incorporation of the Simplified Joint Stock Company (SAS)  (1) expand_more expand_less
Social Security (IMSS) expand_more expand_less
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Register as an employer (IMSS)
(last modified: 13/04/2022)

This procedure allows you to register the employer company with the Mexican Social Security Institute (IMSS) to comply with the employer obligations (in case company counts with employees).

The registration procedure can be performed online or in person at the Sub delegation or Auxiliary Office for Registration and Collections that corresponds according to the tax address or work site address.

You can apply for this step online

language Apply online

Contact details

Entity in charge

Mexican Institute of Social Security (IMSS)

Unit in charge

Membership Coordination

Mon: 08:00 - 15:30
Tue: 08:00 - 15:30
Wed: 08:00 - 15:30
Thu: 08:00 - 15:30
Fri: 08:00 - 15:30
Sat: closed
Sun: closed

Person in charge

Adriana Alejandra Pedroza Márquez

Head of the Registration Coordination
Tel: +52 (800) 623 2323
Click here to locate your office Click here to locate your office

Expected results

Employer Registration Number Employer Registration Number


1. Tax ID (RFC) of the tax address
Tax ID (RFC) of the tax address (Simple copy)

A company can have several work sites, for this reason the RFC is requested where the employer's tax address is located.

2. Establishment opening notice
Establishment opening notice (Simple copy)
3. Proof of domicile of workplace
Proof of domicile of workplace (original + Simple copy)
4. Location map
Location map (original)
5. Official identification of employer
Official identification of employer (original + Simple copy)
6. Public deed
Public deed (original + Simple copy)

First and last page of the Power of Attorney for acts of dominium, of administration or special power that specifies that the legal representative can carry out any kind of procedures and sing documents before IMSS; as well as the page where the legal representative is named

7. Power of attorney
Power of attorney (original + Simple copy)
In case of legal representative, power of attorney for administration and transaction purposes or special power of attorney, specifying that proxy or representative can engage in all manner of official legal affairs, including signing documents or initiating paperwork before the Mexican Social Security Institute.
In addition, if you carry out the procedure in person, you must present:
1. Valid official ID of the legal representative (INE, IFE or valid passport)
Valid official ID of the legal representative (INE, IFE or valid passport) (original + Simple copy)
2. Registro Federal de Contribuyentes (RFC) del representante legal
Tax ID (RFC) of legal representative (Simple copy)
3. Clave Única de Registro de Población (CURP) del representante legal
Sole Population Registration Code (CURP) of the legal representative (Simple copy)

Cost: Free

Processing is free of charge

Legal justification

1. Ley del Seguro Social
Social Security Law
Art: 15 sect. I, 15 A, 72, 73, and 75
2. Reglamento de la Ley del Seguro Social en materia de afiliación, clasificación de empresas, recaudación y fiscalización
2. Social Security Law Regulations relative to registration, company classification, collection, and taxation
Art: 1 sect. I and IV, 12, 13, 14, 18, 19, 20, 22, 23, 24, 26, 29, 30, and 196

Additional information

Verify the procedure card at CONAMER, key IMSS-02-001-C Verify the procedure card at CONAMER, key IMSS-02-001-C
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