How Microsoft’s Sourcing Strategy Hit 100% Renewable Energy

Microsoft signed its first power purchase agreement (PPA) in Texas in 2013, in what was a modest 110MW deal. Now, thirteen years on, the company has matched 100% of its global annual electricity consumption with renewable energy in 2025 – a target it set for itself five years ago as part of its commitment to becoming carbon negative by 2030.

The figures behind the milestone are substantial. Since 2020, Microsoft has contracted 40GW of new renewable energy capacity across 26 countries, working with more than 95 utilities and developers through over 400 contracts. That, according to Offshore Wind Biz, is enough to power every home in Scotland for 17 years.

Of that total, 19GW is now online and actively delivering clean energy to power grids worldwide, with the remainder scheduled to come online within five years.

Understanding the scope

The environmental claim attached to the milestone centres on Scope 2 emissions – those generated by the electricity that a company purchases. Microsoft says its renewable procurement has reduced its reported Scope 2 carbon dioxide emissions by an estimated 25 million tonnes.

It is worth noting that "matching" consumption with renewable energy through PPAs and certificates is an accounting methodology, rather than a hard guarantee of clean power everywhere, all the time.

The company acknowledges the complexity, stating it will continue participating in industry forums to strengthen carbon accounting frameworks so that procurement "is measured with greater accuracy and delivers real world emissions reductions".

Melanie Nakagawa, Microsoft's Chief Sustainability Officer, and Noelle Walsh, President of Cloud Operations and Innovation, who jointly authored the announcement, characterised today's milestone as a "shared achievement among the utility professionals, clean energy developers, community leaders, technology innovators and forward-thinking policymakers".

All sustainability, net zero and sustainable procurement leaders should attend:

• Procurement & Supply Chain LIVE: The Net Zero Summit - QEII Centre, London, March 4-5
  
  
• Procurement & Supply Chain LIVE: The US Summit - Navy Pier, Chicago, April 21-22
  

Co-located with Sustainability LIVE, these events brings together CPOs, CSCO, CSOs, ESG leaders and senior decision-makers at a moment when sustainability, supply chains and commercial performance are increasingly interconnected.

Tickets can be booked online today for The Net Zero Summit and The US Summit. Group discounts available.

Partnerships driving scale

Central to the strategy has been building repeatable commercial structures that other corporate buyers can adopt.

According to Bloomberg New Energy Finance, more than 200 global corporations collectively purchased nearly 200GW of clean energy worldwide since 2008, a market that Microsoft claims to have helped develop.

A landmark 10.5GW framework agreement with Brookfield – one of the largest single clean energy deals on record – illustrates the scale Microsoft is now operating at.

The agreement is designed to send what Melanie describes as a long-term demand signal that enables developers to raise financing more efficiently and build out supply chains.

Microsoft currently has six energy partners with more than a gigawatt of contracted capacity each and more than 20 partners with at least five separate projects apiece – a structure the company argues demonstrates durable, replicable commercial relationships rather than one-off procurement.

Global market development

Beyond volume, Microsoft points to market development as a meaningful part of its contribution. In Japan, it signed one of the first corporate PPAs in the country's restructured power market: a 25 MW, 20-year virtual PPA with Shizen.

Microsoft credits that deal with helping to catalyse more than 2GW of corporate clean energy procurement in the country since 2024, according to Bloomberg New Energy Finance.

In India, Microsoft purchased a 437 MW solar and wind hybrid offtake from Renew, structured to support energy access and rural electrification.

In its home state of Washington, data centres in Douglas County are supplied by a blend of new wind power and hydropower storage, delivering what the company describes as around-the-clock carbon-free energy.

Future decarbonisation challenges

Matching electricity consumption with renewables is, in many respects, the more tractable part of Microsoft's decarbonisation challenge.

The company's broader 2030 carbon negative target encompasses Scope 3 emissions – those embedded in its supply chain and the use of its products – which are considerably more difficult to address.

Noelle acknowledged the scale of what remains, noting that the world's rising electricity needs "require a balanced, all-of-the-above decarbonisation strategy".

To that end, Microsoft is already looking beyond wind and solar. It has partnered with Helion and Constellation Energy on a 50MW fusion project in Washington state, and struck a deal with Constellation to restart the 835 MW Crane Clean Energy Centre in Pennsylvania – a nuclear facility that had been shut down.

Microsoft's Climate Innovation Fund has allocated US$806m across 67 investees, with 38% directed towards energy systems including carbon-free power, energy storage and grid management. The International Energy Agency, in a 2025 report cited by Microsoft, described a new "Age of Electricity" driven by data centres, electric vehicles, heat pumps and air conditioning.

This is precisely the infrastructure that Microsoft is both contributing to and now claiming to power with clean energy.

Microsoft's Climate Innovation Fund has allocated US$806m across 67 investees, with 38% directed towards energy systems including carbon-free power, energy storage and grid management.

The International Energy Agency, in a 2025 report cited by Microsoft, described a new "Age of Electricity" driven by data centres, electric vehicles, heat pumps and air conditioning.

This is precisely the infrastructure that Microsoft is both contributing to and now claiming to power with clean energy.

Whether the company can hold that claim as electricity demand accelerates through the rest of the decade will be the real test of its 2030 ambition.