The ESG Consulting Boom Has Cooled — But the Work Hasn’t

Summary: The ESG consulting boom has entered its correction phase.

Growth continues, but clients now want outcomes they can audit, not slogans they can quote.

The next winners will be consultants who translate ESG into financial, legal, and operational value.

The market is still growing, but ambition is shrinking

The global sustainability consulting market will hit $54 billion by the end of 2025, with 5 percent annual growth.
But the intent has cooled. Only 23 percent of companies now aim to exceed minimum ESG standards, down from 52 percent in 2022 (Moral Money).

Firms are still spending, but they are buying different things.
Boards now demand measurable impact, regulatory assurance, and balance sheet resilience.

ESG goes mainstream

Half of all consulting projects now include an ESG component.
ESG is no longer a practice line, it is a capability that runs through strategy, risk, operations, and finance.

We are seeing:

• Integration, not isolation. ESG specialists are being folded into sector teams, not parked in sustainability hubs.
• Cross-disciplinary demand. Clients expect consultants to connect regulation, finance, and engineering, not deliver slide decks.
• New buyers. CFOs, CROs, and General Counsel are now the ones approving ESG budgets.

For consultancies, this changes who leads, who sells, and who delivers.

Accuracy is the new frontier

46 FTSE 100 firms restated their ESG data in 2025, the second consecutive year.
That signals two truths: ESG is being measured seriously, and most companies are still not ready for that scrutiny.

This is now a delivery market:

• Sustainability assurance through climate data, governance, and internal controls.
• Transition execution with credible, sequenced plans to deliver on commitments.
• Cost of capital impact linking ESG performance directly to funding rates and investor confidence.

What I am hearing from partners focused here

• Boards are hiring consultants to fix transition plans they once over-promised.
• The EU is scaling back disclosure rules, less reporting, more strategy.
• Work has shifted to financed emissions and supply chains where ESG meets balance sheets and contracts.
• ESG reporting is fading, but regulation-driven and finance-linked strategy is growing fast.
• Clients want compliance without breaching fiduciary duty, not sustainability slogans.

In short, firms are moving from climate storytelling to financial accountability.

Europe is leading the next phase

In the UK, the Transition Plan Taskforce and mandatory climate disclosures are reshaping demand for board-level advisory.
Across DACH, consultants report growing work with industrial clients on Scope 3 supply chain alignment and carbon cost modelling.
In the Middle East, ESG remains growth-linked, built into national infrastructure programmes, not CSR budgets.

The centre of gravity has moved, away from purpose and toward performance.

Where the consulting opportunity sits now

• ESG is embedded in transformation, risk, and capital projects, not standalone work.
• Buyers have shifted, finance, risk, and operations now control ESG budgets.
• Regulatory literacy (CSRD, ISSB, UK Transition Plans) is the new consulting differentiator.
• Partners must demonstrate measurable value such as reduced cost of capital, risk mitigation, or investor retention.
• ESG capability is moving into sector P&Ls. The next hires are ESG-literate industry leaders, not generalists.
• Firms that pair strategic insight with technical delivery, especially in data, engineering, or finance, are winning repeat work.

Takeaway

The ESG hype has cooled, but the consulting demand has not.

Growth is slower, expectations are higher, and credibility is the new currency.

ESG is no longer a cause. It is an operating system for how firms run, report, and raise capital.