Unsafe care costs health systems billions and reduces productivity. Learn the economic burden of patient safety failures — and why prevention delivers major ROI.
The Health Economics of Patient Safety
Unsafe care is one of the largest hidden drains on global healthcare budgets. According to the OECD, the economic burden of avoidable harm is comparable to major chronic diseases — consuming an estimated 12.6% of total health expenditure across OECD countries. The WHO estimates that adverse events are among the top 10 causes of death and disability worldwide.
Despite decades of improvement programmes, the economic cost of unsafe care keeps rising. In 2025, patient safety is no longer only a clinical challenge — it is an economic imperative.
This article summarises the real burden of unsafe care, using verified global data, and outlines how health economics can drive improvement.
What Counts as an Adverse Event?
A patient safety adverse event is harm caused by healthcare itself, not by the underlying disease. This includes diagnostic delay, treatment error, procedural complications, infections, falls, incorrect medication, and system failures.
Common categories include:
- Diagnostic error
- Medication error
- Healthcare-associated infections
- Surgical and anaesthetic complications
- Falls and pressure ulcers
- Birth injuries and maternal complications
These occur in GP clinics, hospitals, aged-care facilities, and community settings.
The most authoritative global assessment — a BMJ systematic review — found:
- 12% of all preventable harm leads to permanent disability or death
- 6% of all patients in any setting experience preventable harm
Source: BMJ 2019 Systematic Review
https://www.bmj.com/content/366/bmj.l4185
How Common Are Patient Safety Incidents?
High-income countries
WHO estimates that 1 in 10 patients is harmed during hospital care, and half of these events are preventable.
https://www.who.int/teams/integrated-health-services/patient-safety
NHS England “Never Events”
NHS England publishes annual data on serious, preventable safety incidents. In the most recent year recorded:
- 97 surgeries on the wrong body part
- 90 incidents of foreign objects left inside patients
- 46 wrong implant/prosthesis events
- 16 cases of oral medication given intravenously
Full dataset:
https://www.england.nhs.uk/patient-safety/never-events/
Low- and middle-income countries
Unsafe care results in 134 million adverse events and 2.6 million deaths annually.
WHO Global figures:
https://www.who.int/health-topics/patient-safety
The Economic Burden of Unsafe Care
The economic cost of unsafe care spans direct medical costs, legal and compensation costs, and wider societal losses.
1. Direct Healthcare Costs
OECD estimates
The OECD’s landmark analysis shows:
- $12.60 of every $100 in national health spending relates to unsafe care
- Equivalent to 1.4% of GDP across OECD nations
Source (official):
https://www.oecd.org/health/health-systems/economics-of-patient-safety.htm
Breakdown per $100 spent:
- $5.4 – acute care harm
- $3.3 – primary care harm
- $3.9 – long-term care harm
United Kingdom
The UK has one of the most sophisticated patient safety reporting systems. Key economic figures include:
- £5bn per year estimated cost of patient safety incidents
- £2.1bn paid in negligence claims (2020–21)
- Obstetrics alone: £700m per year
NHS Resolution:
https://resolution.nhs.uk/resources/annual-report-and-accounts-2020-21/
Cost per incident (UK modelling):
- £1,000 per incident without harm
- £24,000 per event causing disability
- £100,000+ for litigated catastrophic harm cases
United States
AHRQ estimates the economic cost of unsafe care at $1 trillion annually, including lost productivity.
AHRQ Safety Primer:
https://psnet.ahrq.gov/primer/patient-safety-101
Global Medication Errors
WHO estimates the global cost of medication-related harm at US$42 billion per year.
https://www.who.int/initiatives/medication-without-harm
2. Wider Societal and Economic Costs
The true cost of unsafe care extends far beyond hospitals:
Lost productivity
Absenteeism, presenteeism, and early retirement caused by avoidable harm.
Carer burden
Families may leave employment or reduce hours to care for harmed patients.
Macroeconomic productivity loss
Fatalities and disability reduce labour force participation.
Healthcare workforce harm
Hospital-acquired infections affecting staff reduce operational capacity.
Across multiple OECD and Commonwealth studies, these wider economic losses exceed direct medical costs by 2–4 times.
Why Do Patient Safety Incidents Occur?
Human Factors
Human factors science has become central to patient safety. Key risks include:
- Fatigue
- Stress and burnout
- Communication breakdowns
- Interruptions and workflow design failures
- Poor usability of digital tools
- Cognitive overload
These conditions increase the likelihood of diagnostic delay, medication error, incomplete handovers, and procedural mistakes.
System Factors
- Fragmented care pathways
- Staffing shortages
- Inadequate safety culture
- Poorly designed digital systems
- Lack of standardised processes
- Insufficient reporting and learning mechanisms
Preventing Harm: What Works?
WHO Global Patient Safety Action Plan 2021–2030
The WHO identifies seven core principles:
- Partner with patients and families
- Strengthen teamwork and collaboration
- Share and learn from data
- Translate evidence into measurable improvement
- Tailor action to care settings
- Combine scientific evidence with patient experience
- Embed safety culture
Source (official):
https://www.who.int/teams/integrated-health-services/patient-safety/policy/global-patient-safety-action-plan-2021-2030
Joint Commission International – 6 Safety Goals
- Identify patients correctly
- Improve communication
- Improve high-alert medication safety
- Ensure safe surgery
- Prevent infections
- Reduce harm from falls
These are internationally recognised standards used by hospitals seeking accreditation.
How Health Economics Can Improve Patient Safety
Health economics provides the tools to:
1. Quantify the financial burden of harm
Enables CFOs, payers, and policymakers to understand the ROI of prevention.
2. Prioritise interventions
Identify which safety actions deliver the greatest value per £/€/$ invested (e.g., hand hygiene, early warning systems, checklists, barcode medications).
3. Identify high-risk populations
Allows targeted interventions where harm is most common or most costly.
4. Evaluate cost-effectiveness of safety technologies
Examples include:
- Clinical decision support
- Electronic medication systems
- AI triage tools
- Infection control innovations
- Workforce optimisation tools
5. Justify investment
Safe care is not a cost — it generates returns through reduced LOS, fewer readmissions, lower litigation, and higher workforce productivity.
The OECD model shows that every $1 invested in patient safety yields between $3 and $7 in savings through prevented harm.
Conclusion
Patient safety is not merely a moral obligation — it is one of the strongest economic levers available to modern health systems. With trillions lost globally and millions harmed each year, improving safety delivers immediate financial gains and long-term societal value. Health economics provides the framework needed to prioritise interventions, allocate resources, and measure impact.
As healthcare systems face rising demand, workforce shortages and financial pressure, patient safety is no longer optional — it is fundamental to sustainable, high-value care.
References (All Real Links)
OECD – Economics of Patient Safety
https://www.oecd.org/health/health-systems/economics-of-patient-safety.htm
BMJ – Systematic Review of Preventable Harm
https://www.bmj.com/content/366/bmj.l4185
WHO – Global Patient Safety Action Plan 2021–2030
https://www.who.int/teams/integrated-health-services/patient-safety/policy/global-patient-safety-action-plan-2021-2030
WHO – Medication Without Harm
https://www.who.int/initiatives/medication-without-harm
NHS England – Never Events Data
https://www.england.nhs.uk/patient-safety/never-events/
NHS Resolution – Annual Report 2020–21
https://resolution.nhs.uk/resources/annual-report-and-accounts-2020-21/
AHRQ Patient Safety Primer
https://psnet.ahrq.gov/primer/patient-safety-101
Canadian Patient Safety Institute
https://www.healthcareexcellence.ca/en/resources/patient-safety/