Well, hello there. It's been a big week for corporate carbon geeks like me. The Science Based Targets initiative (SBTi) has released Version 2.0 of its Corporate Net-Zero Standard - and it's one of the most significant updates to climate target-setting frameworks in years. I've dug through the weeds so you don't have to - and here's my initial take.

TLDR: V2.0 is more flexible than its predecessor. That flexibility creates real opportunities for companies ready to act ambitiously. It also creates risks for those tempted to use it as cover for weaker commitments. The companies that get this right will build genuine credibility. The ones that don't will face scrutiny from investors and NGOs.

Here's what's changed, and what you need to think about next.

1. 'Best-efforts' compliance

Companies can now remain SBTi-compliant even if they miss a target – provided they are transparent about the barriers they faced and demonstrate mitigating actions taken.

This is a meaningful concession to real-world complexity. But it's also a provision that demands serious internal governance. Without that, it becomes a mechanism for repeatedly excusing underperformance. Transparency requirements mean the evidence will be on the record.

2. Tiered categories: A and B

V2.0 introduces a two-tier structure that determines your obligations:

Category A – large companies and mid-sized companies headquartered in high-income countries.

Category B – smaller companies and those in lower-income countries.

Several of the more demanding requirements apply to Category A only. Establishing which category you fall into is the logical first step before anything else.

3. More flexible scope 1 targets

V2.0 offers three approaches: absolute reduction, intensity reduction, or asset transition. Less prescriptive than before – but that means more strategic thinking is required, not less. The right choice depends on your sector, business model, and decarbonisation pathway. Choosing poorly at the outset is harder to correct later than it might seem.

4. Scope 3 flexibility – with a significant caveat

Only Category A companies must now set scope 3 targets, and justified exclusions are permitted.

The caveat matters: scope 3 is where most companies' most material emissions sit. The categories most likely to be excluded are often the highest-emitting ones. Weak justifications will not survive scrutiny. If you are Category A, treat scope 3 exclusions as a strategic decision with reputational consequences – not an administrative convenience.

5. Implementation hierarchy

V2.0 sets a clear priority order:

1. Reduce at source – direct operational and value chain reductions
2. Market instruments – such as renewable energy certificates or power purchase agreements
3. Sector-level action – a last resort, not a primary strategy

This matters because it signals what SBTi considers genuine action. Companies relying heavily on market instruments to meet near-term targets should revisit their pathway.

6. Transition plans: from ambition to delivery

As my colleague George sets out on LinkedIn, the most significant structural shift in V2.0 is potentially this: transition plans are now compulsory for all companies, with larger organisations required to publish them. For too long, corporate decarbonisation has stalled at measurement and target-setting without seriously confronting the harder question: how do we actually get there? Mandatory transition plans force that question into the open and shift the focus from ambition to delivery.

The risk is that transition plans could become another compliance document - static, generic, and disconnected from real decisions. That would miss the point entirely. A transition plan is only as valuable as the actions it drives.

Done well, the new granularity requirements - covering emissions-intensive activities and significant categories - should help companies focus effort where it genuinely matters, rather than spreading attention too thinly across the whole emissions footprint.

7. Ongoing Emissions Responsibility (OER)

OER – accountability for residual emissions that cannot be eliminated – is voluntary now, but mandatory for Category A companies by 2035.

That sounds distant, but it really isn't. The market for high-integrity carbon removals is still maturing, supply is constrained, and sourcing credible solutions takes time. Companies that start scoping their OER approach now will be in a substantially better position than those that wait.

What this means if you already have an SBTi commitment

If your targets were set under V1, you'll likely need a gap analysis. Areas typically requiring attention include near-term target updates, transition plan disclosure (as mentioned above), and assured base year emissions data. The sooner that analysis is done, the more lead time you have.

What this means if you're setting targets for the first time

The tiered structure and revised scope 3 rules create genuine strategic choices that didn't exist under V1. Getting those choices right from the start is significantly easier than unpicking them later. The bigger and more ambitious your goals, the more important it is to get the foundations right.

How Bioregional can help

Turning a daunting regulatory shift into a clear, actionable path forward is exactly what we do here at Bioregional. We won't just help you meet the standard – we'll help you understand what genuine ambition looks like within it, and build a plan your team can actually deliver.

We've spent over 30 years working at the intersection of sustainability and business reality, helping organisations of all sizes go beyond compliance and make their commitments mean something.

If you're unsure what V2.0 means for your organisation, get in touch below – we'll help you work out where you are and what you need to do next.

About the author: Nick Wadsworth, Associate Director, Bioregional

With over 15 years of experience in sustainability and project delivery, Nick has developed innovative sustainability strategies and net-zero pathways for some of the world's largest companies. He has extensive experience developing decarbonisation strategies and action plans that turn ambition into reality, with clear KPIs and governance structures, navigating internal dynamics to build cross-party buy-in. Follow Nick on LinkedIn here.