TL;DR — Quick Summary

IDSE IMSS error downloading the monthly anticipated payment statement (EMA): fix browser compatibility, expired e.firma, and Java plugin issues

When you try to download the Monthly Anticipated Payment Statement (EMA - Emisión Mensual Anticipada) from the IMSS IDSE portal and the system shows errors, blocks authentication, or the download is interrupted, your ability to meet employer obligations on time is at risk. The EMA is the document containing the advance calculation of contributions the employer must pay monthly to IMSS, and being unable to download it prevents you from knowing the exact amount due and generating the bank payment reference.

The Error

When trying to access the Emission > Monthly Anticipated Statement section in IDSE, the most frequent errors include:

“Error de seguridad: No se puede establecer conexión segura con el servidor” (Security error: Cannot establish secure connection with the server)

“El certificado digital no es válido o ha expirado” (The digital certificate is not valid or has expired)

“Error al cargar el componente de firma digital” (Error loading the digital signature component)

“La página no se puede mostrar” (The page cannot be displayed / This site is not compatible with your browser)

These errors appear at different stages of the process:

  • When attempting to log into IDSE with the e.firma (before authentication)
  • After authentication, when navigating to the Monthly Statement section
  • When clicking the Download button, when the download fails to start or is interrupted
  • When the system displays a blank page or a timeout error after several minutes of waiting

Root Cause

Errors downloading the EMA from IDSE have multiple causes generally related to the user’s computer configuration:

Incompatible browser. IDSE was designed to work with Internet Explorer and uses ActiveX components and Java applets that are not compatible with modern browsers like Chrome or Safari. While Microsoft Edge offers an IE compatibility mode, it must be manually configured for the IMSS site.

Expired or revoked e.firma certificate. The e.firma (formerly FIEL) has a validity period of 4 years for both legal entities and individuals. If the certificate has expired or been revoked by SAT, IDSE will reject the authentication. This can also happen if the .cer and .key files are damaged or if the private key password is incorrect.

Outdated Java plugins. IDSE requires Java Runtime Environment (JRE) to run digital signature components. If Java is not installed, is outdated, or the browser blocks it for security reasons, the signature components will not load and you will be unable to authenticate or download documents.

Connectivity and timeout issues. IMSS servers can experience high demand, especially around payment deadlines (15th-17th of each month). This causes timeouts, incomplete downloads, or blank pages. Corporate firewalls or proxies may also block the connection to ports required by IDSE.

Step-by-Step Solution

1. Configure the browser correctly

Use Microsoft Edge with IE compatibility mode:

  1. Open Edge and navigate to edge://settings/defaultBrowser
  2. Under Allow sites to be reloaded in Internet Explorer mode, select Allow
  3. Under Internet Explorer mode pages, add https://idse.imss.gob.mx
  4. Restart Edge and navigate to IDSE

If using Firefox ESR, disable enhanced tracking protection for the IDSE site:

  1. Navigate to https://idse.imss.gob.mx
  2. Click the shield icon in the address bar
  3. Disable protection for this site

2. Validate and renew the e.firma

Check your certificate status:

  1. Locate your .cer and .key files on your computer
  2. Double-click the .cer file to view its properties
  3. Check the Valid until field — if the date has passed, you must renew

To renew the e.firma:

  1. Go to sat.gob.mx > Procedures > e.firma
  2. Generate a new certificate request using the SAT Certifica application
  3. Complete the process online or schedule an appointment at your nearest SAT office

3. Install and configure Java

  1. Download the latest JRE version from java.com
  2. Install Java with default options
  3. Open the Java Control Panel (search for “Java” in the Start menu)
  4. Go to the Security tab and add https://idse.imss.gob.mx to the Exception Site List
  5. In the Advanced tab, check Enable Java in the browser

4. Clear browser cache and data

Before trying again:

  1. Press Ctrl + Shift + Delete in the browser
  2. Select Cookies, Cache, and Website data
  3. Clear the data and close the browser completely
  4. Reopen the browser and access IDSE again

5. Download the EMA

With the browser and e.firma correctly configured:

  1. Navigate to https://idse.imss.gob.mx
  2. Select your .cer file, then your .key file
  3. Enter your private key password
  4. Navigate to Emission > Monthly Anticipated Statement
  5. Select the desired period and click Download
  6. Save the file to a known location on your computer

Alternative Solution

If after all the previous steps you still cannot download the EMA:

  • Use a different computer: Try from a different machine running Windows 10 or 11 with an updated Edge browser. Some computers with restrictive corporate configurations block the necessary components.
  • Try during off-peak hours: Access IDSE between 10:00 PM and 6:00 AM or on weekends, when server load is lower.
  • Contact IMSS: Call the IMSS Digital support line at 800-623-2323 to report the issue and request that they send you the EMA by email or guide you through the solution.
  • Request support from your subdelegation: In urgent cases, the IMSS subdelegation corresponding to your employer registration can provide you with the EMA information directly.

Prevention

  • Renew your e.firma in advance — do not wait for it to expire. Schedule the renewal at least 30 days before the expiration date
  • Keep Java updated and configure security exceptions for IDSE after every update
  • Save a copy of the EMA each month immediately after downloading it, in both digital and printed format
  • Configure Edge with IE mode permanently to avoid reconfiguration each time
  • Download the EMA as soon as it is published (17th-20th of the previous month) to avoid last-minute issues due to server congestion
  • “AccessControl Access Denied” when signing documents in IDSE: Java permissions error resolved by adding the site to Java security exceptions and running the browser as administrator.
  • IDSE does not recognize the e.firma after renewal: Clear browser cookies and cache. If it persists, verify that you are using the new .cer and .key files and not the previous ones.
  • The EMA shows incorrect amounts: EMA amounts are an advance calculation based on registered movements. If there are discrepancies, verify that your affiliation movements and salary modifications are up to date in SUA.

Summary

  • Errors downloading the EMA from IDSE are primarily caused by incompatible browsers, expired e.firma, Java issues, or server congestion
  • Use Microsoft Edge with IE compatibility mode and configure the necessary exceptions
  • Verify that your e.firma is valid and renew it before it expires
  • Install Java and add IDSE to the security exception list
  • Download the EMA as soon as it is published to avoid problems from high demand around deadline dates