Renewing Your SSL Certificate

SSL certificates have a limited validity period — typically one year (up to 398 days maximum, as of industry standards set by the CA/Browser Forum). Renewing your certificate before it expires is critical to maintaining your website’s security and avoiding browser warnings.

Why Renewal Matters

When an SSL certificate expires:

• Browsers display security warnings such as “Your connection is not private,” which drives visitors away.
• Search engine rankings can drop as search engines may penalize insecure sites.
• Online transactions stop as users cannot securely submit payment or personal data.
• Trust is lost — visitors may not return after seeing a security warning.

When to Renew

• Most SSL providers send renewal reminders 30, 60, and 90 days before expiration.
• You can typically renew up to 90 days before the expiration date without losing any remaining time — the unused days are added to the new certificate’s validity period.
• Set your own reminders so you don’t rely solely on provider notifications.

How to Check Your Certificate’s Expiration Date

In the Browser

1. Visit your website.
2. Click the padlock icon in the address bar.
3. Click “Certificate” or “Connection is secure” → “Certificate is valid.”
4. View the “Valid to” or “Expires on” date.

Via Command Line

echo | openssl s_client -servername yourdomain.com -connect yourdomain.com:443 2>/dev/null | openssl x509 -noout -dates

Via Online Tools

Use SSL Labs or SSL Checker to view certificate details including the expiration date.

Renewal Process

Step 1: Generate a New CSR (If Required)

Some providers require a new Certificate Signing Request for renewal. Generate one using OpenSSL:

openssl req -new -newkey rsa:2048 -nodes -keyout yourdomain.key -out yourdomain.csr

See How to Generate a CSR Using OpenSSL for detailed instructions.

Step 2: Submit the Renewal

1. Log in to your SSL provider’s account.
2. Navigate to the SSL certificate you want to renew.
3. Select the Renew option.
4. Submit the new CSR if required.
5. Complete the validation process (same as the original issuance — DV, OV, or EV).

Step 3: Complete Domain Validation

Depending on your certificate type, you may need to:

• Respond to a validation email sent to the domain’s administrative contact.
• Add a DNS record (CNAME or TXT) to your domain’s DNS settings.
• Upload a file to a specific path on your web server.

Step 4: Download and Install the New Certificate

Once issued, download the new certificate and install it on your server:

1. Replace the old certificate files with the new ones.
2. Update any intermediate/CA bundle certificates.
3. Restart your web server to apply the changes.

See Finding and Installing Your SSL Certificate for platform-specific installation instructions.

Step 5: Verify the Installation

1. Visit your site and check for the padlock icon.
2. Verify the new expiration date in the certificate details.
3. Run an SSL Labs test to confirm everything is working correctly.

Automating Renewal with Let’s Encrypt

If you use Let’s Encrypt certificates, renewal can be fully automated using Certbot:

# Test auto-renewal
sudo certbot renew --dry-run

# Set up a cron job for automatic renewal
sudo crontab -e
# Add: 0 3 * * * certbot renew --quiet --post-hook "systemctl reload nginx"

Let’s Encrypt certificates are valid for 90 days, and Certbot will automatically renew them when they are within 30 days of expiration.

Common Renewal Issues

Best Practices

1. Renew early — start the renewal process at least 30 days before expiration.
2. Set calendar reminders independent of provider notifications.
3. Automate where possible — use ACME clients like Certbot for Let’s Encrypt.
4. Keep records of certificate expiration dates for all your domains.
5. Test after installation to confirm the new certificate is active and the chain is complete.