The Role of Offsets in a Net Zero Strategy
Let us be direct about something from the outset. Offsetting is not net zero. It is a tool that supports net zero when used in the right way and in the right order.
The right order is this: reduce first. Offset what you genuinely cannot eliminate.
A business that offsets all of its emissions without making meaningful reductions is using carbon credits as a shield, not a strategy. Regulators, investors, and informed customers increasingly see through this. And under the Green Claims Code, making net zero or carbon neutral claims on the basis of offsetting alone, without genuine underlying reduction, carries significant legal risk.
That said, for SMEs that have already begun reducing their emissions, high-quality carbon offsets are a legitimate and valuable part of the picture. They allow you to take responsibility for the emissions you have not yet been able to eliminate, while your reduction programme continues to progress.
Understanding Carbon Credits
A carbon credit represents one tonne of CO2e that has either been prevented from entering the atmosphere or removed from it. When your business purchases and retires a credit, you are claiming that offset against an equivalent tonne of your own emissions.
Not all credits are equal, and the difference matters enormously for the credibility of your claims.
Avoidance credits are generated by projects that prevent emissions that would otherwise have occurred, such as protecting a rainforest from deforestation or replacing a coal-fired plant with a renewable alternative. These are the most common type and tend to be lower in cost.
Removal credits are generated by projects that actively take carbon out of the atmosphere, such as reforestation, biochar production, or direct air capture. Science-based frameworks increasingly favour removals for long-term net zero balancing, because they address the root of the problem rather than simply slowing the rate at which it grows.
For most SMEs at an early stage of their net zero journey, a combination of both types is practical and appropriate. As your own emissions reduce and your understanding deepens, gradually shifting your offset portfolio towards higher-quality removals is best practice.
What Makes a High-Quality Carbon Credit?
This is one of the most important questions in the carbon market, and one where the wrong answer has caused significant reputational damage to businesses that bought cheap credits without scrutiny.
When evaluating carbon credits, look for the following:
Additionality. The project must demonstrate that the emissions reduction or removal would not have happened without the revenue from carbon credits. If a project is financially viable without carbon finance, its credits may not be genuinely additional.
Permanence. The carbon stored or avoided must remain stored. Reforestation projects, for example, carry a risk that trees are later felled or destroyed. High-quality schemes include buffer pools to account for this.
Measurability and verification. Emissions reductions must be quantified using a recognised methodology and independently verified by a third party.
Registry registration. Every legitimate credit has a unique serial number and can be tracked from issuance to retirement through a recognised registry. This prevents double counting and allows buyers to confirm that credits have not been sold to multiple parties.
Recognised certification standard. Look for credits certified under the Verified Carbon Standard (VCS), the Gold Standard, or equivalent recognised schemes. These provide assurance that the project has been independently assessed against rigorous criteria.
Transparency about the project. You should be able to find out exactly what project you are supporting, where it is, what it does, and who is running it. Opaque products with vague project descriptions are a warning sign.
Avoid very low-cost credits without clear project information. In the carbon market, price is often a proxy for quality. A credit that costs pennies per tonne is unlikely to meet the standard required to support credible sustainability claims.
When Should an SME Start Offsetting?
There is no single right answer to this, but a few principles can guide the decision.
Offsetting before you have measured your footprint is counterproductive. You do not know what you are offsetting or whether it is proportionate to your actual emissions.
Offsetting as a first response, before implementing any reduction actions, is likely to attract criticism and may not withstand scrutiny under the Green Claims Code.
Offsetting as a complement to active reduction, once your programme is under way and you are tracking year-on-year progress, is entirely credible and appropriate. Many SMEs choose to offset a portion of their residual emissions each year as they reduce the total over time.
If you want to achieve carbon neutral status as a milestone on your way to net zero, purchasing and retiring verified credits to cover your remaining emissions after reduction is the standard approach, provided you are transparent about what is being offset and why.
What Is Independent Certification and Why Does It Matter?
Everything covered in this series, your measurement, your targets, your reduction actions, and your offset use, is only as credible as the evidence behind it.
Independent certification is the process by which a third party assesses your carbon footprint data, your methodology, and your claims, and verifies that they are accurate, complete, and consistent with recognised standards.
For SMEs, this matters for several interconnected reasons.
It makes your claims defensible. Under the Green Claims Code, claims must be substantiated. Independent verification is the most robust form of substantiation available. It means that when you say your business has reduced its emissions by 30 per cent, there is an independent expert who has reviewed the data and agreed.
It builds trust with stakeholders. Customers, buyers, investors, and lenders all give significantly more weight to verified data than to self-reported figures. The difference between “we believe our emissions are X” and “our emissions have been independently verified as X” is substantial in a commercial context.
It protects against greenwashing risk. Self-reported sustainability claims are the ones most likely to attract regulatory scrutiny. Verified claims are far more defensible if challenged.
It keeps you honest internally. The process of preparing for verification, gathering data rigorously and having it assessed by an external expert, tends to improve data quality and internal discipline over time.
NCZ provides independent verification that is practical and accessible for SMEs, without the complexity or cost associated with enterprise level audit processes. Our team will work with you to ensure your data is collected correctly, your methodology is sound, and your resulting claims are ones you can stand behind.
Staying on Track: Building Long-Term Momentum
A net zero programme is not a project with a finish line. It is a permanent feature of how a responsible business operates.
The businesses that maintain momentum over the long term share a few common habits.
They measure every year without exception. An annual footprint assessment keeps your data current, allows you to track genuine progress, and ensures your targets remain relevant as your business evolves.
They review their targets regularly. The regulatory environment, customer expectations, and the science of climate change are all moving. Targets set in 2022 may need to be strengthened by 2027. Build a formal review into your calendar.
They embed sustainability into business planning. Net zero stays on track when it is part of how major business decisions are made, from procurement to capital expenditure to new market entry, not when it is treated as a separate workstream.
They communicate progress, including setbacks, honestly. If your emissions went up in a particular year because your business grew significantly, say so. Explain what you are doing to decouple economic growth from carbon emissions. Transparency builds the kind of trust that short term positive spin erodes.
They stay informed. Regulation, reporting requirements, certification standards, and technology are all evolving. Keeping up to date, and working with specialists who do the same, means you are not caught out by changes that others saw coming.
Your Action Checklist for Part 5
- Assess your current residual emissions (what remains after your reduction actions) and decide whether offsetting is appropriate at this stage.
- If you are purchasing offsets, verify that they carry a recognised certification such as the Gold Standard or Verified Carbon Standard.
- Confirm that any credits you purchase are registered and can be tracked to retirement in a recognised registry.
- Document your offset purchases and the rationale, including why those emissions are currently unavoidable.
- Begin or continue the process of independent carbon footprint verification with a recognised third party.
- Set your annual measurement date and add it to your business calendar.
- Schedule a formal review of your net zero targets every two years.
You Have Reached the End of the Series. Now the Real Work Begins.
Working through this series means you have covered everything a smaller business needs to understand to build a credible, practical, and commercially valuable net zero programme.
You now know how to measure your footprint, set meaningful targets, reduce your emissions in the areas that matter most, report your progress credibly and compliantly, and use your sustainability credentials to build trust and win business. You also understand the role of offsets and independent certification in giving your programme long term credibility.
The businesses that act on this knowledge now will be ahead of those that wait. The direction of travel is clear: sustainability will become a baseline expectation, not a differentiator. The only question is whether your business is already building towards that standard.
You have everything you need to start.
NCZ supports SMEs at every stage of the net zero journey described in this series, from your first carbon measurement to independent certification and beyond. If you have read this far and are ready to take the next step, our team would love to hear from you.