The cost of poor occupational safety and health is spread across items that rarely appear on the same statement: penalties, compensation claims, production downtime, replacement of personnel, insurance premiums and the working time absorbed by administrative tasks. Estimates presented in 2017 by the European Agency for Safety and Health at Work (EU-OSHA), the International Labour Organization and a group of research institutes put the cost of work-related injury and illness at 3.9% of global GDP, around EUR 2,680 billion a year, and at 3.3% of GDP in the European Union, around EUR 476 billion.
For an EHS manager who has to defend a budget, aggregate figures set the terms of the discussion and go no further. What follows is where those costs land inside a single company, what the evidence says about the return on prevention, and the four quantities that make the case measurable in house.
Where the cost lands inside the company
- Workforce contraction. An adverse event takes qualified people off the line, temporarily or permanently, and the organization pays for replacement, induction and the output that was not delivered. The composition of the aggregate figures explains why much of this stays invisible in the annual accounts: the same estimates attribute 86% of work-related deaths worldwide, and 98% of those in the EU, to occupational illness rather than to accidents, with occupational cancer the largest single cost item in most European countries and musculoskeletal disorders the second. Those costs mature years after the exposure that produced them, and by then they are read as ordinary turnover and absence.
- Litigation and compensation. Alongside enforcement penalties, the company faces civil claims from workers, legal fees and the cost of investigations and proceedings. Each of them also absorbs management time long after the event itself.
- Downtime and productivity. Equipment or areas placed out of service, a line stopped, a malfunction traced back to an inspection that was omitted or carried out poorly: each generates lost hours and contractual penalties for missed deliveries. Degraded operating conditions carry a quieter cost as well, because error and defect rates rise where controls are weak.
Where documented compliance becomes market access
- Supplier qualification. ISO 45001 requires the organization to control the activities it outsources and to coordinate health and safety with its contractors, so a client’s own certification turns into a documentation requirement for its contractors and for the suppliers of the processes it outsources. Large clients, general contractors and third-party prequalification schemes go further and ask for training records, inspection evidence and incident history before a company is admitted to an approved supplier list. They ask for the same evidence again at every renewal, which is where an undocumented system becomes expensive.
- Access to technical skills. Injury rates and visible structural gaps also weigh on the recruitment and retention of specialized technical staff, and where they do the company pays for the difference through turnover.
- Rating and cost of capital. Where banks and insurers weigh health and safety governance in their risk models, the record of an organization follows it into the price of credit and of cover. Experience rating works in the same direction, and in several national insurance schemes a documented prevention program is the condition for a rate reduction, so the evidence an organization keeps has a direct effect on what it pays.
What prevention returns
The institutional reference is the study Calculating the International Return on Prevention for Companies, published in 2013 by the International Social Security Association (ISSA) with DGUV and BG ETEM. It draws on interviews with 337 companies in 19 countries and puts the return at 2.2 for every unit invested, per employee and per year. The figure rests on the values that company representatives themselves assigned to the costs and the benefits of prevention, so it reads as an expert assessment rather than as accounting evidence.
A systematic review published in BMC Public Health in August 2026 covers 112 studies carried out between 2003 and 2024 on workplace health prevention and promotion programs, a perimeter that includes occupational health, ergonomics and lifestyle interventions and leaves safety management proper outside. It reports a positive cost-benefit ratio in 89% of cases and a median return of 3.1 for every unit invested, with the highest values in ergonomic interventions (5.2), which is the part of that perimeter closest to the daily work of an EHS function. The return also rises with the duration of the program, which matters for budgeting: the ratio describes a practice maintained over years rather than a single purchase.
The ISSA coefficient is a gross benefit-to-cost ratio, while the review reports its 1:3.1 as a return on investment. Both express the benefit obtained for each unit invested, and neither is a net margin. Both are also scenario values, drawn mostly from high-income countries and calculated from the employer’s point of view, so for an individual company they work as a reference point, while the demonstration rests on quantities measured in house.
The four quantities to measure before adopting a system
Aggregate data defines the perimeter of the discussion. The return is measured on indicators the company already holds, and recording them before adoption provides the term of comparison.
- Hours per month spent collecting and consolidating safety data. How many people, for how long, to produce the picture that management receives.
- Requirements overdue in the period. How many due activities sit past their deadline, and by how many days on average.
- Recurring audit findings. How many findings concern the same subject in two consecutive audits, which is the most direct indicator of a corrective action left open.
- Duplicated information. How many data items are held in more than one system or file, and what it costs to keep them aligned.
Four measurable items, which together say how much resource the control effort consumes and how much risk remains uncovered. A saving percentage is credible when it rests on this baseline.
Conclusions
Management that joins the structural level to the operational one moves safety from the cost register to the asset register, and the evidence of that shift sits in the numbers the company records about itself.
For anyone who has to justify the spend internally, the practical criterion is to present the four quantities as measured today, state which of them the system makes continuously readable, and fix the date of the next measurement.
How 4HSE makes these quantities readable
In 4HSE the prevention activities, that is training, personal protective equipment, health surveillance, maintenance and procedures, sit in the same environment as the personnel records and the events, each with a date, an owner and its documentary evidence. From that base the quantities behind the business case can be read directly: which requirements are assigned and which are missing, how many activities were carried out and documented against those planned for the period, how much time separates the recording of a nonconformity from its closure, which findings keep coming back. The data is available in the platform and exportable in standard formats for analysis in management control.
The system is configured on the standard the organization actually works to, whether an international management standard or a national framework, so the same configuration holds across sites in different countries.
References and further reading
Institutional and scientific references
- EU-OSHA (European Agency for Safety and Health at Work), ILO (International Labour Organization), the Finnish Ministry of Social Affairs and Health, the Finnish Institute of Occupational Health (FIOH), the WSH Institute Singapore and ICOH — Global estimates of the cost of poor occupational safety and health, presented at the XXI World Congress on Safety and Health at Work, Singapore, 2017. Work-related injury and illness account for 3.9% of global GDP, around EUR 2,680 billion a year, and for 3.3% of GDP in the European Union, around EUR 476 billion. Occupational illness accounts for 86% of work-related deaths worldwide and 98% of those in the EU, with occupational cancer the largest cost item in most European countries and musculoskeletal disorders the second. The euro figures come from a conversion at the 2016 ECB reference rate.
- ISSA (International Social Security Association), with DGUV and BG ETEM — Calculating the International Return on Prevention for Companies: costs and benefits of investments in occupational safety and health. Final report, DGUV Report 1/2013, from a project started in 2010. Interviews with 337 companies in 19 countries, with a return on prevention of 2.2 per unit invested, based on the costs and benefits reported by the companies themselves. An interim summary of the same project, published in 2011, reports 300 companies in 15 countries, which is why the 2013 final report is the version cited here.
- Llamas P., Martín Estévez M. I. — Return on investment in workplace health prevention and promotion: a systematic review (2003–2024), BMC Public Health, 2026. Review of 112 international studies, with a positive cost-benefit ratio in 89% of cases, a median return of 3.1 and the highest values in ergonomic interventions (5.2).
Further reading on 4HSE
