← cd ~/deadlines
// deadlines · .NET
.NET 8 and .NET 9 end of support.NET · 10 Nov 2026
.NET 8 (LTS) and .NET 9 (STS) stop receiving patches, including security fixes. Retarget apps and runtimes to .NET 10, which is supported until November 2028.
In short: this takes effect on 10 Nov 2026. That's 5 days from when this page was built.
Time left
Countdown to 10 Nov 2026 (UTC).
What to do
- Read the official notice: Microsoft source ↗.
- Follow the step-by-step guide: 10 November is the biggest end-of-support day of the year: what ends, how to find it, and what to move to.
- Add every Microsoft deadline to your calendar: subscribe to the deadlines calendar.
Other upcoming .NET deadlines
- 12 Jan 2027 .NET Framework 4.6.2 reaches end of support
- 9 Jan 2029 .NET Framework 3.5 SP1 reaches end of support
Sources