In Odoo each major version usually follows a predictable lifecycle: a period of standard support followed by a shorter extended support phase.

For Odoo 15 the timeline is roughly as follows:

• Release: October 2021
• End of standard support: October 2024

After this date the version moves into extended support, which is available only for customers with an additional paid agreement.

How long does extended support last?

Odoo typically provides extended support for a limited period after the standard support ends (usually around one additional year). During this time only critical fixes and security updates may be delivered, and mainly for supported hosting environments such as Odoo.sh or Enterprise deployments.

What does “Not Supported” mean?

When a version becomes not supported, it does not mean the software disappears or stops working. It simply means that Odoo no longer provides:

• new bug fixes
• security patches
• official maintenance or technical support

Can you still download and use Odoo 15?

Yes. The code remains available, and on-premise installations can continue running normally. However, the system will run without official updates, so over time it may become more difficult to maintain or secure.

For that reason many companies plan their upgrade during or shortly after the extended support phase. Moving to a more recent version such as Odoo 17 ensures continued security updates and compatibility with newer modules and integrations.

Hello Amar,

Great question this is a common point of confusion.

• “Extended support” (paid) for Odoo 15 typically continues for a limited period after standard support ends (October 2024), but Odoo does not always publish a fixed end date. It’s best to confirm directly with Odoo or your partner for the exact timeline.

• “Not Supported” means:

  • You can still use, download, and install Odoo 15
  • However, there will be no official bug fixes, security patches, or updates

So technically, your system will keep running, but from a security and long-term stability perspective, planning an upgrade (e.g., to Odoo 17) is strongly recommended.

Hope this works for you! If you need any help implementing this or want a more optimized approach, feel free to reach out for further discussion

Regards,

Zehntech Technologies Inc.

santosh.sekwadia@zehntech.com

If you're an Indian SME running v15 Community with GST modules and custom manufacturing workflows, migration needs careful planning since GST module structures changed significantly in later versions.