Ask whether ESG is transforming accountants into strategic advisors and you tend to get one of two answers. Either a confident yes — sustainability consulting is the next growth frontier — or a sceptical shrug, pointing out that most firms still make the bulk of their money from compliance work. The honest answer sits somewhere between the two, and it matters for any SME trying to understand what their accountant should actually be doing for them in 2026.

What is clear is that ESG reporting has moved decisively from the voluntary column into the mandatory one. UK corporate accountants are now expected to validate not just historical financial performance but an organisation's capacity to manage environmental and social risks going forward. That is a fundamentally different ask — and it requires a different kind of thinking to produce a year-end set of accounts.

So is the profession rising to that challenge, or is ESG mostly generating compliance paperwork with a green label? Here is our honest take.

For most of the last decade, ESG was something larger listed companies did to satisfy investor relations and the occasional journalist. Smaller businesses could note it, file it under probably relevant eventually, and get on with running their operations. That window has closed.

The direction of UK policy is unambiguous: disclosure expectations are tightening, auditable sustainability reporting is extending down the company size spectrum, and clients facing new government expectations need advisors who can help them respond — not just file returns. Firms that track the regulatory pipeline are already anticipating growth in sustainability consulting as a genuine service line, not a side project.

What this means practically is that the conversation between a business and its accountant has had to expand. Historically, a good set of management accounts told you how the business performed against budget last quarter. Increasingly, funders, supply chain partners, and regulators also want to know how the business is managing carbon exposure, workforce governance, and supply chain ethics. Those are strategic questions, not bookkeeping ones — and they land on the accountant's desk by default because no one else in a small business has the data infrastructure to answer them.

The case for accountants as ESG advisors is not just regulatory opportunism — there is a genuine skills overlap that makes the profession well-placed to add value here.

ESG reporting, at its core, is a data and measurement problem. You need to identify what to track, build the systems to capture it reliably, apply a reporting framework, and then assure the output. Accountants do a version of that every month for financial data. The underlying disciplines — materiality assessment, data governance, internal controls, external assurance — translate directly.

The same management accounting skills we use to build KPI dashboards and rolling forecasts for our clients are, structurally, very similar to what robust ESG measurement requires. You are designing a reporting framework, selecting relevant metrics, and making sure the numbers are defensible. The subject matter is different; the methodology is recognisable.

This is also why we think a virtual finance director model is well-suited to ESG work for smaller businesses. An outsourced FD who already understands the business, its data flows, and its strategic context is far better placed to build a credible ESG reporting framework than a specialist consultant parachuted in with no knowledge of the underlying numbers.

Here is where the transformation narrative runs into a reality check. Industry surveys suggest that around 86% of accountancy firms now offer some form of business advisory services. Yet advisory work accounts for only around 8% of total fee income across the sector. That is a striking mismatch — and it tells you that offering a service and genuinely delivering it at scale are very different things.

Most firms have advisory capability. Far fewer have made it central to what they charge for. The reasons are understandable: compliance work is recurring, predictable, and relatively straightforward to price. Advisory engagements are more varied, harder to scope in advance, and require a different client conversation. ESG consulting sits squarely in that harder category.

The practical implication for SMEs is that you cannot assume your accountant has meaningful ESG advisory experience just because they mention it on their website. The right questions are: have they helped clients build ESG reporting frameworks before? Do they understand which frameworks are relevant to your sector and size? Can they help you distinguish between disclosures that genuinely reflect how you manage environmental and social risks — and box-ticking exercises that meet the letter of a requirement without conveying anything useful?

Those distinctions matter, because the consequences of getting ESG reporting wrong are increasingly real.

One of the more honest observations from practitioners who have engaged closely with ESG reporting is that the hesitancy in the profession is not irrational. Accountants are cautious by training — and ESG carries risks that compliance work typically does not.

The most significant is greenwashing: disclosures that technically satisfy a reporting requirement but present a misleading picture of how a business actually manages environmental or social risks. When an accountant puts their name to financial statements, there is a well-established framework for what assurance means. ESG is still developing equivalent standards, and the gap between what a disclosure says and what it means in practice can be wide.

There is also a cost question. Building robust ESG data collection typically requires new systems, additional staff time, and in some cases external assurance. For larger businesses, those costs are offset by improved risk management and more efficient resource use. For smaller firms, the cost-benefit calculation is less clear-cut, and implementation pain is real — particularly when regulatory expectations shift over time, as they tend to do.

Our view is that accountants who engage with ESG advisory work need to be honest with clients about these limitations, rather than treating sustainability consulting as a straightforward upsell. Done well, it adds genuine value. Done carelessly, it creates liability and erodes trust — neither of which serves anyone.

If you run an SME and you are trying to work out what ESG means for you practically, the starting point is not a comprehensive sustainability report. It is an honest conversation about where your reporting obligations currently sit, where they are heading, and what your clients, funders, or supply chain partners are already asking for.

For most smaller businesses in 2026, formal ESG disclosure requirements are not yet a live compliance issue — but they are approaching, and the data infrastructure takes time to build. The businesses that will handle the transition most smoothly are those that start tracking relevant metrics now, even informally, rather than scrambling to retrofit a reporting framework when a requirement arrives.

A good accountant should be helping you think about this in the context of your actual business — not selling you a generic ESG package, but asking which environmental or governance metrics are genuinely material to your operations, your sector, and your stakeholders. That is a strategic conversation. Using your accounting data more strategically is the foundation — ESG reporting is, in many ways, an extension of that same discipline applied to a broader set of business risks.

So yes, ESG is creating real demand for strategic advisory work. Whether your accountant is genuinely equipped to deliver it — rather than just positioned to offer it — is worth asking directly.