Microsoft has created tool with help of Forrester  to  help you determine if your current Windows 11 upgrade timeline will lead to completion by Windows 10 EOS (October 14, 2025) and what the benefits and costs of accelerating your upgrade timeline might be. The costs necessary to secure devices after Windows 10 EOS include purchasing Extended Security Updates (ESUs) to temporarily secure devices until they can be upgraded.

Why to use this tool ?

This will provide timeline to create a baseline plan for Windows 10 EOS before October 14, 2025, so business doesn’t have adverse effects

This will also help to quantify  the potential benefits and costs to your organization by upgrading all its devices to Windows 11 before Windows 10 EOS to prevent incurring additional maintenance cost.

Also give insight on additional costs necessary to keep any Windows 10 devices secure after Windows 10 EOS could lead to recurring cost which eventually affect budget as well as limitation of users for applications with outdated os security limitations.

More details at : https://www.microsoft.com/en-us/windows/end-of-support?r=1