IMSS SIPARE Error Generating Payment Reference or Online Contribution Payment

TL;DR — Quick Summary

SIPARE error generating payment reference or making IMSS contribution payments. Complete guide to fix access, payment, and SUA file upload problems.

SIPARE (Sistema de Pago Referenciado) is the official IMSS platform for Mexican employers to generate payment references and pay employer-employee social security contributions electronically. Errors in SIPARE can result in surcharges and fines if not resolved before the payment deadline. This guide covers the most common problems and their solutions.

Common SIPARE Errors

The most frequent errors include: employer registration not found (verify your 11-character registration number), incorrect payment file format (regenerate from the latest SUA version), unable to generate payment reference (check if the period’s issuance has been processed), session expired or page unavailable (use Chrome or Edge, clear cookies), and amount mismatch with issuance (download the IMSS issuance from IDSE and compare).

Payment Issues

Payment references are valid for 5 business days. If expired, request a new one — do not attempt to pay with an expired reference. If payment was made but not reflected, wait 48-72 business hours. Keep the bank receipt as backup and check SIPARE’s Payment Query section.

System Requirements

Browser: Google Chrome 90+ or Microsoft Edge (Chromium) 90+
Java: Not required (unlike IDSE)
Certificates: Valid e.firma (FIEL) for operations requiring it
Connection: Stable internet, preferably not on public networks

Prevention

Generate payment references at least 3 business days before the deadline
Verify data before uploading — check periods, registration numbers, and amounts
Keep SUA updated to the latest version
Save backups of payment files and bank receipts

Summary

SIPARE is the official IMSS platform for generating payment references and paying social security contributions
Most frequent errors relate to incorrect registration numbers, improperly formatted payment files, and incompatible browsers
Payment references are valid for 5 business days — generate them in advance
Use updated Chrome or Edge and disable pop-up blockers
Always keep payment receipts as backup for discrepancies

Guide & Instructions

Estimated Time: 30m

Tools Needed:

SIPARE IMSS
SUA
Updated web browser

Verify SIPARE access

Access SIPARE from the IMSS portal at https://sipare.imss.gob.mx. Use your employer registration number and password. If you cannot access it, verify your digital certificate is current.

Generate the payment file in SUA

Open SUA, select the payment period, calculate contributions, and generate the payment file in .sua format from the Reports and Queries menu.

Upload the payment file to SIPARE

In SIPARE, go to File Upload, select the generated .sua file, verify the total amount is correct, and confirm the upload.

Obtain the payment reference

After successful upload, SIPARE will generate a payment reference valid for 5 business days. Download or print the receipt with the bank reference number.

Make payment at authorized bank

Use the payment reference to pay through online banking or at any IMSS-authorized bank branch before the expiration date.

Frequently Asked Questions

What is IMSS SIPARE?

SIPARE (Sistema de Pago Referenciado) is the IMSS platform that allows employers in Mexico to generate payment references and pay employer-employee social security contributions electronically through authorized banks.

Why can't I generate my payment reference in SIPARE?

Common errors include incorrect employer registration number, SUA file not generated beforehand, invalid payment file format, incompatible browser, or SIPARE platform under temporary maintenance.

Which browser should I use for SIPARE?

SIPARE works best with updated Google Chrome or Microsoft Edge. Internet Explorer is no longer supported. Disable pop-up blockers and allow cookies for idse.imss.gob.mx.

How to upload the SUA payment file to SIPARE?

First generate the payment file from SUA with the correct format. In SIPARE, select File Upload, browse for the generated .sua file, verify the amount matches, and confirm the upload to obtain the payment reference.