NHS 2027 Carbon Reduction Plan Requirements: A Practical Guide for Suppliers

NHS England has published new guidance outlining what NHS suppliers will need to do from April 2027 as part of the NHS Net Zero Supplier Roadmap.

While the roadmap has been in place for several years, the new guidance provides clarity on what organisations will be expected to report, how carbon reduction plans will be assessed, and how emissions reporting requirements will evolve across NHS procurement.

For suppliers of NHS goods, services and works, it's clear: carbon reporting is becoming an increasingly important part of the procurement process. Organisations that begin preparing now will have time to establish robust reporting processes, improve data quality and engage suppliers. Those who leave preparation until 2027 may find themselves under significant pressure to meet requirements within a short timeframe and risk future contracts as a result.

TrackZero insight: “A few years ago, carbon reporting was largely a sustainability exercise, but it's fast becoming a commercial requirement. Organisations are finding that customers, procurement teams and supply chain partners want credible emissions data. And that's only going to increase over the coming years.” — Alan Wilson, CEO, TrackZero

In this guide, we'll explain what the new requirements mean, who they apply to, what suppliers need to have in place by 2027, and the practical steps organisations should be taking now.

At a glance

TL;DR — here's what changes for NHS suppliers come April 2027:

• New rules hit the biggest suppliers first. Contracts worth £5m+ per year, plus all new NHS frameworks and dynamic markets, fall under the enhanced 2027 NHS CRP standard.
• Smaller suppliers keep the current rules. Contracts below £5m still follow the existing 2024 CRP requirements (aligned with PPN 006, formerly PPN 06/21).
• Scope 3 gets a lot bigger. Suppliers in the enhanced tier report all relevant GHG Protocol scope 3 categories, not the current subset of five.
• Supply chain data moves to the centre. Expect closer scrutiny of supplier emissions and stronger expectations on supply chain engagement.
• Exclusions need a paper trail. Any scope 3 category you leave out must be justified in writing, with reporting boundaries clearly defined.
• CRPs are now procurement gates, not sustainability side-projects. A non-compliant CRP means you don't bid.
• April 2027 is the deadline, not the start date. The work to be ready starts now.

Does this apply to your organisation?

Not all NHS suppliers will be subject to the same requirements. The NHS has introduced a two-tier approach, with requirements set by contract value and procurement type.

For suppliers subject to the enhanced 2027 requirements, Carbon Reduction Plans will need to cover Scope 1, Scope 2 and all relevant Scope 3 emissions, alongside net zero commitments, board-level approval and public disclosure.

Businesses that anticipate bidding for NHS contracts should begin preparing now rather than waiting for requirements to become mandatory.

What NHS suppliers need to do today

If you're already bidding for NHS work, there is a good chance you are already subject to Carbon Reduction Plan requirements.

Under current NHS procurement requirements, suppliers are typically expected to publish a Carbon Reduction Plan that includes:

• Scope 1 emissions
• Scope 2 emissions
• Five specific Scope 3 categories:
  • Business travel
  • Employee commuting
  • Waste generated in operations
  • Upstream transportation and distribution
  • Downstream transportation and distribution
• A commitment to achieving Net Zero by 2050
• Public publication of a Carbon Reduction Plan
• Board or director approval

The April 2027 requirements do not replace this framework. They build on it. If you're already producing a Carbon Reduction Plan for NHS tenders, you're not starting from scratch, but you may need to expand your reporting, particularly around Scope 3 emissions and supply chain data.

What changes in April 2027?

For suppliers subject to the enhanced NHS Carbon Reduction Plan requirements, four key areas change.

In practical terms, the biggest change is moving from reporting a limited number of Scope 3 categories to assessing the emissions across your entire value chain.

This means organisations will need to understand where emissions occur across their operations, procurement activities, logistics, suppliers and, in some cases, the use of their products and services. And for many, the challenge isn't calculating the emissions, it's obtaining and coordinating the data in the first place.

What you need to have in place by April 2027

Suppliers in the 2027 NHS CRP tier should expect the following six things to be in place when they bid for an in-scope contract.

1. A published Carbon Reduction Plan

The CRP must be approved at board level (or by a company director if no board exists), signposted clearly on your website, and dated within eighteen months of the tender notice. It needs to follow the structure of the PPN 006 (formerly PPN 06/21) CRP template, with stylistic variation allowed.

2. Scope 1 and Scope 2 emissions data

Direct emissions from owned operations (gas, fleet, refrigerants) and indirect emissions from purchased energy (electricity, heat, steam) covering the full reporting boundary. Both baseline year and most recent reporting year figures must be declared, broken down by scope and reported in CO2e across the seven Kyoto Protocol greenhouse gases.

3. A full Scope 3 assessment

All fifteen GHG Protocol categories reviewed for relevance, with figures reported for every relevant category and a written explanation, aligned to the Corporate Value Chain Standard, for any category excluded. Spend-based estimation is allowed where primary data isn't available, provided the method is documented and there's a credible plan to improve it.

4. A net zero commitment with a global boundary

A public commitment to reach net zero by 2050 or earlier, covering the whole organisation on a global geographical boundary. The NHS encourages 2045 as best practice, and independent third-party validation of the target (for example via SBTi) is recommended, though not required.

5. Environmental management measures and governance

The CRP must set out the specific carbon reduction measures and certifications you have in place, framed as actions you can deliver under the contract. Behind that, you need the methodology documentation, calculation workings and board sign-off records that demonstrate the figures are auditable and the commitment is owned at a senior level.

6. A plan for continuous improvement

The NHS recognises that suppliers won't have perfect primary data on day one. What they expect is a credible roadmap for improving data quality year on year — moving from spend-based to supplier-specific to primary data where the category is material, and refreshing the CRP annually through the contract term.

What does the NHS expect around supplier engagement?

The NHS isn't requiring suppliers to obtain primary emissions data from every subcontractor immediately. But organisations are expected to build carbon reporting processes that engage suppliers, improve visibility across the supply chain, and progressively move from spend-based estimates towards supplier-specific data.

Identify your high-impact suppliers first

You don't need to engage everyone at once. Start with the suppliers that account for the largest share of your scope 3 footprint (typically a mix of high-spend relationships, emissions-intensive categories and any subcontractors tied to your critical products or services). For most organisations, a small number of suppliers will account for the majority of upstream emissions. A medical device manufacturer might find that purchased components and inbound freight account for seventy per cent of scope 3; a facilities management contractor might find it sits in subcontracted labour, fleet fuel and consumables.

Ask suppliers for the right information

One emissions number a year tells you almost nothing. You want their footprint at organisation level, product-level data where they have it, the emission factors used, their net zero target and date, any certifications, and their CRP if they've published one. Across your top suppliers, that's enough to see which parts of your supply chain are getting cleaner and which aren't.

Move beyond spend-based estimates over time

Spend-based calculations are the fastest route to a defensible first baseline, which is why most organisations start there, but shouldn't end there. For any scope 3 category that materially affects your footprint, plan to replace spend-based figures with supplier-specific data, product-specific emissions data, and primary data from your supply chain — both the NHS and the GHG Protocol expect that progression.

Demonstrate progress, not perfection

The 2027 NHS CRP doesn't require a complete, primary-data supply chain inventory on day one. It requires evidence that you understand where your emissions sit, that you have a credible plan to improve the data, and that you're making measurable progress year on year. Annual CRP updates show that progress is happening.

The three changes suppliers are most likely to underestimate

The headline changes are easy enough to follow but what sits underneath them may trip suppliers up.

1. Scope 3 is no longer a box-ticking exercise

For many organisations, Scope 1 and Scope 2 emissions are relatively straightforward, being based on fuel consumption, company vehicles and purchased energy. Scope 3 is different.

The GHG Protocol identifies fifteen Scope 3 categories covering emissions generated across an organisation's wider value chain, from purchased goods and services through to product use and end-of-life treatment. Under the enhanced NHS Carbon Reduction Plan requirements, suppliers are expected to assess all relevant Scope 3 categories and justify any exclusions.

For many organisations, the most significant categories are likely to include:

• Purchased goods and services (Category 1)
• Capital goods (Category 2)
• Upstream transportation and distribution (Category 4)
• Use of sold products (Category 11)

2. Global reporting boundaries matter

Another important change is the requirement for a global reporting boundary under the enhanced 2027 NHS Carbon Reduction Plan.

Historically, many organisations have focused on reporting emissions associated with their UK operations. For some suppliers, particularly those operating internationally or as part of larger groups, this approach may no longer be sufficient.

The guidance makes it clear that organisations must carefully consider how reporting boundaries are established and how emissions are attributed across group structures.

For example, a UK subsidiary that forms part of a multinational organisation may need to consider emissions associated with international purchasing, manufacturing, logistics or other activities linked to the reporting entity.

3. Carbon Reduction Plans are becoming a procurement gate

Many organisations still view carbon reporting as a sustainability exercise but it's increasingly becoming a procurement requirement.

Carbon Reduction Plans are designed to establish a minimum standard that suppliers must meet in order to progress through procurement processes. The thing that'll keep you out of NHS contracts isn't necessarily your carbon footprint itself but not being able to show it.

Examples that may result in a Carbon Reduction Plan failing the assessment include:

• No Carbon Reduction Plan provided
• Missing emissions scopes without explanation
• No commitment to achieving net zero
• Lack of board or director approval
• Failure to publish the plan publicly
• Reporting information that is significantly out of date

Like quality management, information security or health and safety, carbon reporting is becoming part of the infrastructure suppliers need in place before opportunities arise.

The NHS recognises that suppliers are on different journeys

One of the most encouraging aspects of the new guidance is that NHS England recognises suppliers are starting from different levels of maturity. Suppliers are not expected to have perfect data from day one and, where necessary, may use reasonable estimation methodologies while working towards improved accuracy over time.

Most organisations begin with:

• Spend-based calculations
• Industry averages
• Secondary emissions factors
• Estimated Scope 3 data

As reporting processes mature, these estimates can be progressively replaced with:

• Supplier-specific emissions data
• Product-level information
• Primary activity data
• More detailed Scope 3 assessments

The key requirements are demonstrating a credible approach, a commitment to improvement, and a plan to increase data quality over time.

Using Evergreen as a readiness check

The NHS Evergreen Sustainable Supplier Assessment is one of the most useful places to benchmark where you stand, but it's a reporting tool, not a calculation tool. It asks suppliers to declare what they've already done (total scope 1, 2 and 3 emissions for both base year and reporting year), which scope 3 categories are relevant, whether emissions have been independently verified, target years, and links to your published CRP and emissions data.

To answer this credibly, you need the underlying carbon accounting work in place, which is where a carbon reporting platform like TrackZero comes in — to calculate the emissions, map the scope 3 categories, and produce the figures and documentation Evergreen then asks you to report.

Evergreen becomes a useful gap analysis: it shows exactly which questions you can answer today, which require more data, and how far you sit from each maturity level. And because the Evergreen maturity ladder maps closely to the 2027 NHS CRP requirements (Level 2 broadly matches the new minimum, Level 3 and 4 reflect the NHS's best-practice tier), it doubles as a readiness check for April 2027.

A practical action plan for suppliers

The April 2027 milestone may seem some distance away, but preparation really should start now. Here's our recommendations on what to do, when.

The next 90 days

• Review the NHS guidance and determine which requirements apply to your organisation.
• Assess your current Carbon Reduction Plan and reporting maturity.
• Review all 15 Scope 3 categories and identify which apply to your business.
• Establish reporting boundaries and determine which legal entity will report.

If you want to start working through the numbers in this window rather than wait, TrackZero's Essentials plan gives you the core of what TrackZero does (enough to scope your Scope 1 and 2 baseline and map your Scope 3 categories) without the enterprise commitment. You can try it free for 7 days before deciding.

The next 12 months

• Build a complete Scope 1, Scope 2 and Scope 3 baseline.
• Begin engaging strategic suppliers and collecting emissions data.
• Develop governance and board-level ownership.
• Create or update your Carbon Reduction Plan.

Before April 2027

• Improve data quality and reduce reliance on estimates where possible.
• Increase the use of supplier-specific and primary emissions data.
• Test procurement readiness against NHS requirements.
• Ensure your Carbon Reduction Plan is current, approved and publicly available.

How TrackZero helps

TrackZero was built to make carbon accounting simple, accurate and actionable.

TrackZero helps organisations:

• Measure Scope 1, Scope 2 and Scope 3 emissions
• Create and maintain Carbon Reduction Plans
• Set reduction targets and reduction projects
• Engage suppliers and collect primary Scope 3 data
• Generate sustainability and compliance reports
• Track progress over time

Whether you're an NHS supplier preparing for 2027, a business considering future NHS opportunities, or a consultant supporting clients through the transition, having the right systems in place today will make compliance significantly easier. Our PPN 06/21 software supports the full journey from measuring emissions to publishing a compliant Carbon Reduction Plan.

Conclusion

The publication of the NHS 2027 guidance removes much of the uncertainty surrounding the next stage of the Net Zero Supplier Roadmap. For suppliers, it's not that every organisation must immediately produce perfect emissions data; however, carbon reporting is becoming an increasingly important part of procurement readiness.

The suppliers that begin preparing now will have time to understand their emissions, engage their supply chains and improve data quality over time. Those who wait until the final months before implementation may find themselves under pressure to meet requirements that have been years in the making.