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Legacy Modernization

Your 2027 Modernization Budget: The Line Items Most Plans Miss

By

October 25, 2026

6 min read

Extended support and ESU charges that start or double in 2027, licence changes from Power BI to Fabric, the cost of the January 2027 Microsoft cluster, and the labour to avoid all of it. A worksheet of the line items to price, with the published rates we have checked this year.

2027
Planning
FinOps
Extended Support
Legacy Modernization

Most 2027 budgets include the projects people have asked for. Fewer include the charges that start automatically if those projects slip. Put both in, side by side, and the upgrade work usually pays for itself on paper.

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Charges that start or rise in 2027

Line item

Published rate

Applies to

RDS and Aurora Extended Support

$0.100 per vCPU-hour (years 1–2), $0.200 (year 3), US East

MySQL 8.0, PostgreSQL 13 and, from March 2027, PostgreSQL 14; Aurora MySQL v2 at year-3 rates

EKS extended support

$0.60 per cluster-hour instead of $0.10

Clusters more than 14 months behind

ElastiCache Extended Support

80% premium, 160% from February 2028

Redis OSS 4 and 5

OpenSearch Extended Support

Surcharge equal to the instance price

The oldest Elasticsearch and OpenSearch versions, from November 7, 2026

Windows 10 ESU

$122 per device in year two, $244 in year three, cumulative

PCs still on Windows 10

Windows Server 2016 ESU

Annual subscription via Azure Arc

Servers past January 12, 2027

Power BI Premium to Fabric

F64 about $8,410 a month pay-as-you-go, about 41% less reserved

Each P SKU at its renewal

Work to budget

  • The January 2027 Microsoft cluster: Windows Server 2016, .NET Framework 4.6.2, BizTalk 2016, System Center 2016 and TFS 2017.

  • Database upgrades that remove Extended Support charges, ordered by monthly charge.

  • Kubernetes version upgrades on a schedule, so EKS never enters extended support.

  • Licence reviews at each Microsoft and Atlassian renewal: edition right-sizing often saves more than infrastructure changes.

  • Contingency for the integration nobody listed. There is always one.

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As of October 25, 2026. Provided as is, for general information, and accurate to the best of our knowledge on the date shown. Not legal, compliance, tax, financial or other professional advice. Prices, limits and vendor services change; check current vendor documentation before relying on anything here. Terms of use.