CSRD Social Reporting: A Practical Guide to ESRS S1 — Own Workforce

When companies hear "CSRD," most immediately think carbon emissions and climate targets. But the Corporate Sustainability Reporting Directive covers far more than the environment. Social reporting — how you treat your people — is equally prominent in the European Sustainability Reporting Standards.

ESRS S1 (Own Workforce) is often the most data-intensive social standard, and for good reason: it asks companies to disclose how they manage working conditions, diversity, pay equity, health and safety, and worker engagement. For many companies, this is where the real compliance challenge lies — not because the concepts are new, but because the data has never been pulled together in one place.

This guide breaks down what ESRS S1 requires, how to approach data collection, and the practical steps to get your social reporting right.

What Does ESRS S1 Cover?

ESRS S1 applies to your own workforce: employees and non-employee workers (contractors, temps, agency staff) who are part of your operations. It doesn't cover supply chain workers — that's ESRS S2 (Workers in the Value Chain).

The standard is organised around four sub-topics:

1. Working conditions — employment terms, wages, work-life balance, job security
2. Equal treatment and opportunities — diversity, gender pay gap, inclusion, anti-discrimination
3. Other work-related rights — freedom of association, collective bargaining, privacy
4. Health and safety — occupational health, workplace incidents, safety management systems

Each sub-topic includes a mix of qualitative disclosures (policies, processes, actions) and quantitative metrics (headcount breakdowns, incident rates, pay ratios).

Key Disclosures You Need to Prepare

Policies and Due Diligence

ESRS S1 starts with governance. You need to disclose:

• Whether you have policies covering each sub-topic (and if not, why not)
• How those policies align with international standards — particularly the UN Guiding Principles on Business and Human Rights and the ILO Fundamental Conventions
• Your due diligence process for identifying and mitigating negative impacts on your workforce
• How workers or their representatives are engaged in developing these policies

If your double materiality assessment identified own workforce as a material topic, you're required to report against S1. If it's not material, you still need to explain why you reached that conclusion.

Workforce Composition

This is where the data gets granular. Required breakdowns include:

• Total headcount by gender, country, and employment type (permanent, temporary, full-time, part-time)
• Number of non-employee workers (contractors, agency staff) with similar breakdowns
• Turnover rates — voluntary and involuntary, broken down by gender
• New hires during the reporting period

Companies operating across multiple countries face a particular challenge here. HR systems often store data differently by jurisdiction, and definitions of "contractor" vs "employee" vary. Start your data collection process early — this data doesn't materialise overnight.

Working Conditions

Under working conditions, key disclosures include:

• Adequate wages — whether all workers earn at least an adequate wage (aligned with applicable benchmarks, not just minimum wage)
• Social protection coverage for employees
• Working hours and policies on overtime, flexible work, rest periods
• Work-life balance policies — parental leave, carer's leave, and actual uptake rates

The adequate wage disclosure is particularly tricky. "Adequate" doesn't mean "legal minimum." ESRS S1 asks whether wages cover basic needs, and companies need a methodology for assessing this — especially across countries with different cost-of-living levels.

Equal Treatment and Diversity

This sub-topic addresses:

• Gender pay gap — reported as the difference in average gross hourly earnings between male and female employees, expressed as a percentage
• Diversity metrics — board composition, management composition, and overall workforce by gender and age group
• Disability inclusion — percentage of employees with disabilities (where legally permitted to collect)
• Anti-discrimination and harassment — policies, training, number of reported incidents

For companies that haven't run a formal gender pay gap analysis before, this can be a significant project. It requires clean payroll data, consistent job-level classifications, and a methodology that accounts for valid pay differences. Don't underestimate the time required.

Health and Safety

Health and safety disclosures require:

• Whether you have an occupational health and safety management system (and whether it's certified, e.g. ISO 45001)
• Work-related injuries — number of fatalities, recordable incidents, and high-consequence injuries, plus rates per million hours worked
• Work-related ill health — number of cases, types of conditions
• Coverage of your H&S system — percentage of workers covered
• Training on health and safety topics

Companies in high-risk sectors — construction, manufacturing, logistics — typically have mature safety reporting. But many services-sector companies have never tracked these metrics systematically.

How to Approach ESRS S1 Data Collection

Step 1: Map Your Data Sources

Most S1 data lives across multiple systems:

Data Type	Typical Source
Headcount & demographics	HRIS (Workday, SAP SuccessFactors, BambooHR)
Payroll & compensation	Payroll systems, local providers
Health & safety incidents	EHS platforms, incident logs
Training records	LMS or manual records
Diversity data	Self-declaration surveys, HR records
Contractor data	Procurement, vendor management systems

The biggest gap companies find is non-employee worker data. If you use staffing agencies, the agency holds the data. Build relationships early and specify what you need contractually.

Step 2: Establish Definitions

"Employee" means different things in different countries. Before you start pulling data, align on definitions:

• What counts as a non-employee worker for your purposes?
• How do you define voluntary vs involuntary turnover?
• What's your threshold for a recordable workplace incident?
• How do you calculate adequate wage benchmarks?

Document these definitions. Your auditor will ask for them.

Step 3: Address the Sensitive Data Question

Collecting diversity data — gender identity, disability status, ethnicity — is legally complex. GDPR and local laws impose strict limits on what personal data you can collect and how. Key principles:

• Self-declaration is the gold standard — never infer diversity characteristics
• Collection must be voluntary with clear purpose limitation
• Data should be aggregated to prevent individual identification
• Check local laws in every jurisdiction — some countries prohibit certain categories entirely

If you can't collect certain data legally, ESRS S1 accepts an explanation of why data is not available. This is better than collecting it improperly.

Step 4: Set Baselines and Targets

ESRS S1 asks not just for current metrics but for targets related to material impacts. Examples:

• Reduce the gender pay gap to below 5% by 2028
• Achieve zero workplace fatalities (ongoing)
• Increase female representation in senior management to 40% by 2030
• Ensure 100% of workers earn an adequate wage by 2027

Targets should be time-bound, measurable, and connected to your material impacts. They also need to be realistic — setting unreachable targets undermines credibility.

Common Pitfalls in Social Reporting

Treating S1 as an HR exercise only. Social reporting requires collaboration between sustainability, HR, legal, procurement, and finance. Don't silo it.

Ignoring non-employee workers. Contractors, temps, and agency workers are explicitly in scope. Companies that report only on direct employees will face audit findings.

Inconsistent data across countries. A company with operations in 15 countries will have 15 different HR systems, payroll providers, and legal definitions. Centralising this data takes time. Plan for at least two reporting cycles to get it clean.

Skipping the narrative. Numbers without context are meaningless. If your gender pay gap is 18%, explain why. What structural factors contribute? What actions are you taking? Auditors and stakeholders want the story behind the data.

Confusing diversity reporting with DE&I marketing. ESRS S1 asks for specific, auditable metrics — not a statement about how much you value diversity. Keep it factual.

How ESRS S1 Connects to Other Standards

Social reporting doesn't exist in isolation:

• ESRS S2 (Workers in the Value Chain) covers supply chain labour practices — the upstream counterpart to S1
• ESRS S3 (Affected Communities) and S4 (Consumers and End-users) round out the social pillar
• ESRS G1 (Governance) includes related disclosures on corporate culture, whistleblowing, and anti-corruption
• Overlaps with the EU Taxonomy social objectives and the Corporate Sustainability Due Diligence Directive (CSDDD), which imposes binding obligations on human rights due diligence

Companies using GRI Standards will find significant overlap — GRI 401 (Employment), GRI 403 (Occupational Health and Safety), GRI 405 (Diversity and Equal Opportunity) map closely to S1 sub-topics.

Getting Started: A Practical Checklist

If you're approaching ESRS S1 for the first time, here's where to begin:

1. Check your materiality assessment — confirm that own workforce topics are material and which sub-topics apply
2. Inventory your policies — map existing HR policies to S1 requirements and identify gaps
3. Audit your data — what do you already track? What's missing? Where does it live?
4. Engage HR and legal — align on data collection scope, definitions, and GDPR considerations
5. Start with what you have — report what you can in year one and build towards completeness
6. Set meaningful targets — connect them to your material impacts, not to industry buzzwords
7. Talk to your consultant — if this feels overwhelming, a CSRD consultant with social reporting experience can save months of trial and error. You can also compare options to find the right fit for your organisation's size and complexity.

Final Thoughts

Social reporting under ESRS S1 isn't fundamentally difficult — most companies already manage their workforce. The challenge is systematising, quantifying, and disclosing what's been managed informally until now.

Start early. The data gaps in social reporting are often wider than in environmental reporting, precisely because nobody's been required to report this way before. Companies that invest in building the right data infrastructure now will find subsequent reporting cycles dramatically easier — and more useful for actual decision-making.

The CSRD isn't just about compliance. Done well, ESRS S1 reporting gives leadership a clear picture of workforce health, risk, and opportunity. That's worth having, directive or not.