# Windows Server 2016 ESU cost: what Microsoft charges per core By Rotomal team · Updated 2026-11-03 · Part of [Server 2016 Exit Plan](https://rotomal.com/windows-server-2016-exit/) **Short answer:** Windows Server 2016 Extended Security Updates bought through Azure Arc cost $0.007132 per core per hour for Standard and $0.041067 for Datacenter in Microsoft's own price list (effective 1 August 2026, checked 3 November 2026). That is about $5.21 and $29.98 per core a month, or about $83 and $480 a month for the 16-core minimum per physical server. Billing starts on 13 January 2027 and coverage runs to January 2030. We found no published volume-licensing price for 2016 ESU, and moving the server into Azure does not make 2016 ESU free. ## The published rates Microsoft's Azure Retail Prices API, its machine-readable price list, has these Windows Server 2016 ESU meters in US dollars (checked 3 November 2026). Monthly figures use 730 hours, the month Azure bills on. | Meter | Rate | Per core per month | 16 cores per month | 16 cores per year | | --- | --- | --- | --- | --- | | WS2016 Std 1C ESU (Azure Arc, Standard) | $0.007132 per core-hour | about $5.21 | about $83.30 | about $1,000 | | WS2016 DC 1C ESU (Azure Arc, Datacenter) | $0.041067 per core-hour | about $29.98 | about $479.66 | about $5,756 | | WS 2016 [n] vCPU ESU (Windows Server VMs in Azure, one meter per VM size) | $0.007132 per vCPU-hour (effective 1 September 2026) | about $5.21 per vCPU | about $83.30 for 16 vCPUs | about $1,000 | Microsoft's readable Azure Arc pricing pages had not caught up with these figures when we checked; the numbers above are from the price list itself. ## Worked examples | Server | Licensing basis | Monthly | Three years | | --- | --- | --- | --- | | One physical Standard server with 8 cores | 16 physical cores (the minimum applies) | about $83.30 | about $2,999 | | One Standard VM with 4 vCPUs on a newer host | 8 virtual cores (the minimum per VM) | about $41.65 | about $1,499 | | One physical Standard server with 32 cores | 32 physical cores | about $166.60 | about $5,998 | | A Datacenter host with 16 cores running many 2016 VMs | 16 physical cores, Datacenter | about $479.66 | about $17,268 | Three-year totals assume today's rate holds for the whole period. For comparison, Microsoft lists Windows Server 2025 Standard at $1,176 for 16 core licences (US MSRP), plus CALs. One year of Standard ESU for a 16-core server costs about the same as that new licence, which is why ESU is usually bought for the servers that cannot move by January, not for all of them. ## The rules that change the bill - Minimums: 16 physical cores per machine, or 8 virtual cores per VM. Virtual core licences are Standard only. - Eligibility: you attest to Software Assurance or an equivalent server subscription; machines licensed through SPLA or a server subscription do not need Software Assurance. ESU covers Standard and Datacenter, not Essentials. - Billing starts on 13 January 2027 and is monthly. A licence provisioned later is back-billed to 12 January 2027, so waiting does not save money. - No free extras for 2016: Microsoft says the no-cost disaster recovery benefit and the Visual Studio dev/test benefit are not available for Windows Server 2016 ESUs. - You can lower the core count or deactivate a licence once a server is upgraded; charges continue for up to five calendar days after the change. - Moving from volume licensing to the Azure Arc route is not supported for Windows Server 2016 ESUs, and we found no published volume-licensing price for 2016 ESU. ## Is ESU free if the server moves to Azure? Not for Windows Server 2016. Free ESU for Azure VMs was part of the Windows Server 2012 programme. Microsoft's licensing news says ESU offerings released from 1 April 2026 have the same list price whether you buy in Azure, on-premises or in another cloud, and its price list has a Windows Server 2016 ESU meter for Azure VMs at the same $0.007132 per vCPU-hour. The Windows Server 2012 and 2012 R2 ESU programme itself ended on 13 October 2026. ## Key ESU dates | Date | What happens | | --- | --- | | 3 August 2026 | Windows Server 2016 ESU licences can be configured in the Azure portal | | 6 August 2026 | Microsoft announces general availability of 2016 ESU enabled by Azure Arc | | 12 January 2027 | Windows Server 2016 end of support | | 13 January 2027 | ESU billing begins | | January 2030 | End of ESU coverage (Microsoft: 12 January 2027 through January 2030) | ## Deciding server by server Price ESU only for the servers that truly cannot be upgraded or migrated before January, and set a date to turn each licence off. Server 2016 Exit Plan gives each server a written path for a one-time $199, including the ESU core count to buy where it makes sense and the upgrade route for the rest. ## FAQ ### How much does Windows Server 2016 ESU cost? Through Azure Arc, $0.007132 per core per hour for Standard (about $5.21 per core a month) and $0.041067 for Datacenter (about $29.98), from Microsoft's price list on 3 November 2026. With the 16-core minimum, a physical Standard server costs about $83 a month. ### When does billing for Windows Server 2016 ESU start? On 13 January 2027. A licence you provision later is back-billed to 12 January 2027. ### Can I buy Windows Server 2016 ESU without Azure Arc? Microsoft documents the Azure Arc route, and we found no published volume-licensing price for 2016 ESU when we checked on 3 November 2026. Ask your licensing reseller if you need another route. ### Do I need Software Assurance? You attest to Software Assurance or an equivalent server subscription. Machines licensed through SPLA or a server subscription do not need Software Assurance. ### Does ESU cover Windows Server 2016 Essentials? No. Microsoft says Windows Server 2016 ESUs support the Standard and Datacenter editions. Essentials reaches end of support on 12 January 2027 with no ESU option. ## Sources - Microsoft Azure Retail Prices API: Windows Server 2016 ESU meters (checked 3 November 2026) https://prices.azure.com/api/retail/prices?%24filter=contains(meterName%2C%27WS2016%27) - Microsoft Learn: Billing for ESUs enabled by Azure Arc (2016 billing start and back-billing) https://learn.microsoft.com/en-us/azure/azure-arc/servers/billing-extended-security-updates - Microsoft Learn: License provisioning guidelines for ESUs (core minimums, SA and SPLA, no DR or dev/test benefit for 2016) https://learn.microsoft.com/en-us/azure/azure-arc/servers/license-extended-security-updates - Microsoft Learn: Prepare to deliver ESUs (2016 configuration from 3 August 2026) https://learn.microsoft.com/en-us/azure/azure-arc/servers/prepare-extended-security-updates - Microsoft Tech Community: Windows Server 2016 ESU enabled by Azure Arc generally available (6 August 2026) https://techcommunity.microsoft.com/blog/azurearcblog/generally-available-windows-server-2016-extended-security-updates-enabled-by-azu/4543640 - Microsoft Licensing: services pricing consistency update (same ESU list price in and outside Azure from 1 April 2026) https://www.microsoft.com/en-us/licensing/news/services-pricing-consistency-update - Microsoft Windows Server blog: Planning ahead for Windows Server 2016 end of support (25 February 2026) https://www.microsoft.com/en-us/windows-server/blog/2026/02/25/planning-ahead-for-windows-server-2016-end-of-support/ - Microsoft: Windows Server 2025 pricing https://www.microsoft.com/en-us/windows-server/pricing [Server 2016 Exit Plan](https://rotomal.com/windows-server-2016-exit/) does this for you. Request it free, no card: https://rotomal.com/windows-server-2016-exit/request/ --- Rotomal · https://rotomal.com/windows-server-2016-exit/windows-server-2016-esu-cost/ · hello@rotomal.com