I regularly sit in boardrooms where executives can recite their carbon intensity down to the second decimal place, yet they stare blankly when I ask about the health risks actively degrading their workforce. That isn't just a reporting weakness; it is a massive blind spot in how an organisation understands its own operational resilience, productivity, and long-term value.
The "S" in ESG Has a Glaring Measurement Problem
ESG reporting has undoubtedly matured, but what I see repeatedly is the "S" pillar lagging behind, bogged down in HR policies, workforce demographics, training hours, and headline safety figures. These indicators matter, but they do absolutely nothing to tell us if our employees actually the physical and psychological capacity have to perform sustainably over time.
The gap is becoming incredibly difficult to defend. Take the Health and Safety Executive's recent estimates: in 2024/25, 1.9 million workers in Great Britain suffered from work-related ill health. Dig into that, and you'll find 964,000 cases of work-related stress, depression, or anxiety, alongside 511,000 reports of work-related musculoskeletal disorders. We are haemorrhaging capacity, resulting in an estimated 40.1 million working days lost, with the financial drain of workplace injuries and ill health hitting £22.9 billion in 2023/24 (HSE, 2025).
Stop viewing these as mere occupational health statistics. They are blaring indicators of workforce capacity, management quality, and business continuity. Yet, too many ESG reports still treat health as a narrow compliance box to tick, rather than a vital source of enterprise risk intelligence. That distinction is critical because human sustainability is not the same as offering a wellbeing app or publishing an employee assistance programme. It means engineering working conditions where people can remain healthy and economically active without the business externalising the cost of poor work design onto employees, their families, the NHS, or the wider economy.
Stop Treating Health as a Perk: It’s an Enterprise Risk
The most potent workforce health data bridges the gap between employee experience and business exposure. Absence is a highly visible output, but it only scratches the surface. Presenteeism, reduced functional capacity, delayed recovery times, avoidable turnover, and escalating benefit claims; these are the red flags of underlying health risks that hit long before they appear in financial reporting.
Look at the Office for National Statistics data: the UK lost 148.8 million working days to sickness or injury in 2025, breaking down to an average of 4.4 days per worker. The overall sickness absence rate sat at 2.0%, but for workers with long-term health conditions, that rate doubled to 4.0%, compared to just 1.0% for those without (ONS, 2026).
Relying on a single absence-rate figure is a dangerous game. I've watched companies celebrate stable aggregate absences while completely missing a spike in mental-health issues in their sales division, musculoskeletal risks on the factory floor, or a concentration of long-term conditions in an ageing workforce. Company-wide averages create false reassurance.
For HR leaders, the question shouldn't just be how many days are lost, but exactly where capacity is draining, among which groups, for what reasons, and with what recovery trajectory. For Finance, it's about whether those losses are accurately baked into workforce planning, revenue forecasts, and cost-to-serve assumptions. And for Risk, it's about whether the organisation has identified exposures that could threaten liability, continuity, reputation, or insurance costs. This is exactly where workforce health data belongs in ESG: not tucked away as an employee-benefit appendix, but presented as hard evidence of how you manage a material social and operational risk.
Moving From Passive Disclosure to Decision Intelligence
Pushing for better disclosure does not mean we start publishing sensitive individual medical records. Responsible reporting demands strict aggregation, anonymisation, clear governance, and an absolute firewall between population-level insights and individual employment decisions.
The real question I always ask leadership teams is: can your organisation spot the patterns and actually act on them? We need useful indicators like absence by cause and business unit, duration and recurrence of absence, return-to-work velocity, occupational health referral outcomes, and access to preventative support.
The reporting architecture is already dragging us in this direction. GRI 403: Occupational Health and Safety 2018 demands disclosures on health and safety management systems, work-related injuries, and ill health, while emphasising proactive worker health promotion and hazard management (GRI, 2018). Similarly, the International Sustainability Standards Board is beating the same drum; IFRS Foundation analysis shows that human-capital-related metrics feature across 71% of industries covered by SASB Standards, with workforce health and safety among the principal topics (IFRS Foundation, 2024).
For UK organisations, the message is blunt: you don't need to invent workforce health as a reporting concept. You just need to operationalise it, tie it to materiality assessments, and present it in a form that senior decision-makers can actually use.
What This Means for the Boardroom
If you're in HR, health intelligence must actively drive how you design jobs, workload controls, and hybrid-working arrangements, rather than sitting solely within benefits administration. We aren't trying to medicalise management; we are trying to pinpoint and eliminate preventable sources of workforce friction.
For Finance, the priority is to treat health-related capacity loss as a hard planning variable. Labour costs aren't limited to salaries, they include the bleeding costs of replacement labour, overtime, recruitment, training, delayed delivery, and the massive opportunity cost of management time. Until you link these effects to workforce health data, your business cases for prevention will always look flimsier than they should.
For Risk and Insurance, the real value lies in understanding your exposure long before a policy renewal or a claim escalation. A generic statement that your company "supports employee wellbeing" is effectively useless; you need credible data on health and safety controls, incident history, work-related ill health, and return-to-work processes to provide a true picture of risk management. While the data should support underwriting, its main job is better risk control.
Finally, this is a glaring governance issue. If a board scrutinises climate metrics every quarter but only looks at workforce health data after a serious incident, their ESG oversight is structurally unbalanced. The social pillar requires the exact same discipline we readily apply to environmental and financial risks.
Five Concrete Steps to Close the Gap
- Define workforce health as a material risk: Embed workforce health, functional capacity, and work-related ill health into your organisation's double-materiality or enterprise-risk assessments. This must consider both your impact on workers and their health's potential impact on business performance.
- Establish a common data model: Break down the silos. Pull relevant, properly governed data from HR, occupational health, employee benefits, health-risk assessments, and safety. Nail down consistent terms, ownership, and reporting intervals before you even attempt to build a dashboard.
- Report leading and lagging indicators: Absence and claims are purely lagging measures. Pair them with leading indicators like workload risk, manager training, access to occupational health, early intervention, and ergonomic assessments to build a genuinely useful account of prevention and resilience.
- Segment the analysis: Slice your health trends by business unit, role, location, and age band. Use this segmentation to identify unequal exposure and direct your investments, never to label individuals or make discriminatory employment decisions.
- Put the metric on the board agenda: Give direct accountability to the Audit, Risk, ESG, or Remuneration committee. Require a regular, unvarnished view of workforce health right alongside your financial, safety, and climate indicators. Every material trend needs an owner, a specific intervention, and a metric to prove if that intervention actually worked.
The next phase of ESG reporting will be judged by the hard evidence you produce, not the number of commitments you publish. Workforce health is one of the clearest tests of that credibility. A business that cannot explain how health risks affect its capacity, productivity, and resilience does not yet have a complete view of its social performance. The missing metric isn't another employee survey score. It is a governed, decision-ready picture of whether the workforce can remain healthy enough to sustain the strategy. So, go pull your latest ESG report. If your workforce health data isn't standing shoulder-to-shoulder with your carbon metrics, you are operating blind. Stop treating human sustainability as a peripheral HR exercise and start managing it like the critical operational asset it is.