If your business runs applications on .NET 8, the clock is ticking. Microsoft has confirmed that .NET 8 end of support arrives on November 10, 2026. After that date, your applications will keep running, but they will no longer receive security patches, bug fixes or technical support from Microsoft.
For CTOs, IT managers and business owners, this is not just a developer concern. Running unsupported software increases security risk, creates compliance gaps and makes future upgrades harder and more expensive. In this guide, we explain exactly what the .NET 8 end of support deadline means, the risks of ignoring it, and a practical, step-by-step plan to move your applications to .NET 10.
When Does .NET 8 Support End?
The Official .NET 8 End of Life Date
The official .NET 8 end of life date is November 10, 2026. .NET 8 was released on November 14, 2023 as a Long Term Support (LTS) release. LTS versions receive three years of support, and Microsoft aligns end-of-support dates with Patch Tuesday, which places the final date on November 10, 2026.
There is an important twist this year. .NET 9 also reaches end of support on the same day. .NET 9 is a Standard Term Support (STS) release, and Microsoft extended STS support from 18 months to 24 months. As a result, both .NET 8 and .NET 9 lose support together, and teams on either version face the same deadline.
.NET Support Lifecycle at a Glance
| Version | Release Date | Support Type | End of Support |
| .NET 6 | November 2021 | LTS | November 12, 2024 (ended) |
| .NET 8 | November 14, 2023 | LTS | November 10, 2026 |
| .NET 9 | November 12, 2024 | STS (24 months) | November 10, 2026 |
| .NET 10 | November 11, 2025 | LTS | November 2028 |
Source: Microsoft .NET Support Policy
What Does “End of Support” Actually Mean?
Many businesses assume that end of support means their application will suddenly stop working. That is not the case. Here is what really changes after the .NET 8 end of support date.
No More Security Patches
Microsoft will stop releasing security updates for .NET 8. Any new vulnerability discovered in the runtime, ASP.NET Core or related libraries after November 10, 2026 will remain unpatched in .NET 8. Attackers actively look for systems running software with known, unfixed weaknesses.
H3 No Bug Fixes or Technical Support
Servicing updates and bug fixes will end, and Microsoft technical support will no longer be available for .NET 8 applications. Visual Studio will also begin marking .NET 8 components as out of support in future servicing updates.
Your App Will Keep Running, But Risk Grows Every Month
Your .NET 8 application will continue to run after the deadline. However, every month on an unsupported version increases your exposure to security threats and makes the eventual upgrade larger and more costly.
Risks of Staying on .NET 8 After November 2026
Ignoring the .NET 8 end of life deadline can affect your business well beyond the IT department.
Security Vulnerabilities and Cyberattacks
Unpatched frameworks are a common entry point for attacks. A single exploited vulnerability can lead to data breaches, downtime and reputational damage that costs far more than a planned upgrade.
Compliance and Audit Problems
Regulations and standards such as GDPR, PCI DSS, ISO 27001, SOC 2 and HIPAA expect organisations to keep software supported and patched. Running an unsupported framework can lead to failed audits, penalties or difficult conversations with enterprise clients and cyber insurers, particularly for businesses operating in the UK, EU, US and Australia.
Compatibility Issues with Libraries and Cloud Platforms
NuGet package authors, cloud providers and third-party vendors gradually drop support for retired framework versions. Over time, you may find that new library versions, Azure services or hosting images no longer work with .NET 8.
Rising Maintenance Costs
The longer you wait, the bigger the version gap becomes. Skipping releases means more breaking changes to fix at once, more testing effort and a higher risk of project delays.
What Are Your Options After .NET 8 End of Life?
Option 1: Upgrade to .NET 10 LTS (Recommended)
Microsoft recommends upgrading to .NET 10, the current LTS release, which is supported through November 2028. For most businesses, the best path is to migrate .NET 8 to .NET 10, because it gives you about two more years of security updates and support without needing another major upgrade soon.
Option 2: Extended or Third-Party Support
Some third-party vendors offer paid security support for retired .NET versions. This can buy time for very large or complex systems, but it is a short-term bridge, not a long-term strategy. It adds ongoing cost and still leaves you behind on performance and new features.
Option 3: Stay Unsupported (Not Recommended)
Doing nothing may look like the cheapest option today, but it carries the highest long-term risk. Security exposure, compliance gaps and compatibility issues will continue to grow after the .NET 8 end of support date.
Should you upgrade to .NET 9 instead? No. .NET 9 reaches end of support on the same day as .NET 8, so upgrading to it would not solve the problem. Go straight to .NET 10 LTS.
How to Migrate from .NET 8 to .NET 10: Step-by-Step
Because .NET 8 and .NET 10 share the same modern .NET foundation, the upgrade is usually much simpler than moving from the old .NET Framework. Here is a proven process to migrate .NET 8 to .NET 10 with minimal disruption.
- Audit your application and dependencies. List every project, NuGet package, third-party component and hosting environment your application uses.
- Check third-party library compatibility. Confirm that each package has a version that supports .NET 10, and plan replacements for any that do not.
- Install the .NET 10 SDK and update your tooling. Use the latest Visual Studio version that supports .NET 10, and update CI/CD pipelines and build agents.
- Update the target framework. Change the TargetFramework value in each project file from net8.0 to net10.0, then update Microsoft packages such as ASP.NET Core and Entity Framework Core to their version 10 releases.
- Fix breaking changes and deprecated APIs. Review Microsoft’s official .NET 10 breaking changes list and resolve build errors and warnings.
- Test thoroughly. Run unit, integration, performance and security tests in a staging environment before going live.
- Deploy and monitor. Release in stages where possible, monitor logs and performance, and keep a rollback plan ready.
Tip: Start now. With less than a month before the deadline, early planning helps you avoid a rushed, high-risk upgrade.
Benefits of Upgrading to .NET 10
When you migrate .NET 8 to .NET 10, you do more than meet a deadline. You also gain:
- Long-term support until November 2028, giving your team a stable platform to build on.
- Better performance from ongoing runtime, JIT and garbage collection improvements.
- Stronger security with the latest patches and security enhancements.
- Modern language features with C# 14 for cleaner, more maintainable code.
- Improved cloud-native and container support for modern hosting on Azure, AWS and other platforms.
Still Running .NET Framework or Older .NET Versions?
The .NET 8 end of support deadline is a good moment to review your whole application portfolio. If you also run applications on .NET Core 3.1, .NET 5, .NET 6 or .NET 7, those versions are already unsupported and should be prioritised.
Applications on .NET Framework 4.8 are a different case. Its support is tied to the Windows operating system, so it is not affected by the November 2026 deadline. However, .NET Framework receives no new features, and many businesses are now modernising these legacy systems to .NET 10 for better performance, cloud readiness and easier hiring of developers.
How Softwiz Infotech Can Help with Your .NET Migration
At Softwiz Infotech, we specialise in maintaining and modernising .NET applications for businesses across the UK, United States, UAE (Dubai), Australia and Europe. Whether you need to migrate .NET 8 to .NET 10 quickly or plan a larger modernisation project, our team can help with:
- Migration readiness audits to assess your code, dependencies and risks.
- End-to-end .NET 8 to .NET 10 upgrades with thorough testing and minimal downtime.
- Legacy .NET Framework modernisation to modern .NET.
- Ongoing maintenance and support to keep your applications secure and up to date.
Ready to beat the deadline? Book a free .NET 8 migration assessment with Softwiz Infotech today and get a clear upgrade plan, timeline and estimate.
Frequently Asked Questions (FAQs)
When does .NET 8 support end?
.NET 8 end of support is on November 10, 2026. After this date, Microsoft will no longer provide security patches, bug fixes or technical support for .NET 8.
H3 Will my .NET 8 application stop working after November 10, 2026?
No. Your application will continue to run. However, it will no longer receive security updates, which increases the risk of vulnerabilities and compliance issues over time.
H3 Is .NET 8 still safe to use?
.NET 8 is safe to use until November 10, 2026, while it still receives security updates. After the .NET 8 end of life date, newly discovered vulnerabilities will not be patched, so you should plan your upgrade now.
What is the difference between .NET LTS and STS?
Long Term Support (LTS) releases, such as .NET 8 and .NET 10, are supported for three years. Standard Term Support (STS) releases, such as .NET 9, are now supported for 24 months. Most businesses prefer LTS versions for stability.
Should I upgrade from .NET 8 to .NET 9 or .NET 10?
Upgrade to .NET 10. .NET 9 reaches end of support on the same day as .NET 8, while .NET 10 is an LTS release supported through November 2028.
How long does it take to migrate .NET 8 to .NET 10?
It depends on the size and complexity of your application. A small application with up-to-date dependencies can often be upgraded in a few days, while large enterprise systems with many third-party components may take several weeks, including testing.
How much does a .NET migration cost?
The cost depends on your codebase size, number of dependencies, test coverage and hosting setup. A migration readiness audit is the best way to get an accurate estimate. Softwiz Infotech offers a free initial assessment.
Can I get extended support for .NET 8?
Microsoft does not offer extended support for .NET 8 beyond November 10, 2026. Some third-party vendors provide paid security support, but this is only a temporary solution. Upgrading to .NET 10 is the recommended long-term path.
Conclusion
The .NET 8 end of support deadline on November 10, 2026 is close, and .NET 9 retires on the same day. Your applications will keep running, but without security patches, bug fixes or Microsoft support, the risks will grow every month.
The smartest next step is to migrate .NET 8 to .NET 10, the current LTS release supported through November 2028. With a clear plan covering audit, compatibility checks, code updates, testing and deployment, the upgrade can be fast and low-risk.
Need expert help? Contact Softwiz Infotech for a free .NET migration assessment and move to .NET 10 with confidence.
