Article · Training & Careers · 19 August 2026
UK HSE vs OSHA vs ISO 45001: The Three Systems, Side by Side
The UK HSE, the US OSHA, and the ISO 45001 are the three systems the HSE career works in — and the three are different: the UK is the law, the US is the standard, and the ISO is the system. This article is the three side by side: the law, the regulator, the duty, the difference, and the international career.
The UK HSE: the law, the regulator, the duty
The UK system is the law, and the law is the HSWA 1974. The Health and Safety at Work Act 1974 is the parent: the duty of the employer, the duty of the employee, and the test that is the so far as is reasonably practicable. The HSWA is the UK, and the UK is the law.
The regulator is the HSE (the Health and Safety Executive) for the high-risk industry, and the local authority for the low-risk. The enforcement is the prosecution — the court, and the unlimited fine. The qualification that follows the law is the NEBOSH, and the law is the duty.
The US OSHA: the standard, the citation, the general duty
The US system is the standard, and the standard is the OSHA 29 CFR 1910. The OSHA (the Occupational Safety and Health Administration) is the regulator that writes the standard, and the standard is the citation. The OSHA is the US, and the US is the standard.
The standard is the 1910 (the general industry) and the 1926 (the construction), and the general duty clause is the catch-all: the workplace free from the recognized hazard. The enforcement is the citation and the fine — the administrative, not the court. The qualification that follows the standard is the OSHA 10, the 30, and the 500-hour.
The ISO 45001: the system, the clause, the audit
The ISO 45001 is the system, and the system is the international. The ISO 45001:2018 is the occupational health and safety management system: the clause 4 to the clause 10, the PDCA, and the audit. The ISO is the system, and the system is the certificate.
The clause is the requirement, the PDCA is the logic, and the audit is the check — the stage 1, the stage 2, the surveillance, the recertification. The certification body is the accredited one, and the certificate is the three years. The 45001 is the system that the 9001 and the 14001 sit beside, on the Annex SL.
The side-by-side: the law, the standard, the system
The three systems, side by side:
| UK HSE | US OSHA | ISO 45001 | |
|---|---|---|---|
| What it is | The law (the HSWA 1974 + the regulations) | The standard (the 29 CFR 1910/1926) | The management system (the clause, the PDCA) |
| The regulator | The HSE + the local authority | OSHA + the state plan | The certification body (the audit) |
| The enforce | The prosecution, the improvement notice | The citation, the fine (the serious, the willful) | The certificate, the surveillance audit |
| The risk | The MHSWR (the 5-step) | The general duty + the standard | The clause 6.1 (the risk and the opportunity) |
| The chemical | The COSHH 2002 | The HazCom 2012 (the GHS) | The clause 6.1.2 (the aspect) |
| The report | The RIDDOR 2013 | The OSHA 300 log | The clause 10.2 (the incident) |
| The emergency | The Fire Safety Order 2005 | The 1910.38 (the EAP) | The clause 8.2 (the emergency) |
| The scope | The UK (the law) | The US (the standard) | The world (the system) |
The career: the international
The three are the career, and the career is the international. The UK HSE is the UK and the Commonwealth: the law, the duty, and the NEBOSH. The US OSHA is the US and the standard: the citation, the fine, and the OSHA 30-hour. The ISO 45001 is the world: the clause, the certificate, and the lead auditor.
The HSE professional who knows the three works in the three — the UK site on the law, the US site on the standard, and the international site on the system. The three are the career, and the career is the international one.
Need the sign-off, not just the article?
The article is the preparation; the sign-off is the professional. For the statutory assessments, the audits, the ISO 45001 implementation and the training that comes with them, ask Muhammad Umer — 8+ years across Iraq, KSA and Pakistan, and the programme runs through umer-hse.pro. One message gets the written scope.
Common questions
UK HSE vs OSHA vs ISO 45001 — answered
What is the difference between UK HSE and OSHA?
The UK HSE is the law (the HSWA 1974 + the regulations, the HSE regulator, the prosecution, the unlimited fine). The US OSHA is the standard (the 29 CFR 1910/1926, the citation, the fine, the general duty clause). The UK is the law that is the duty; the US is the standard that is the enforcement.
What is the difference between OSHA and ISO 45001?
The OSHA is the US standard that is enforced (the 29 CFR, the citation, the fine) — the regulator writes it, and the regulator enforces it. The ISO 45001 is the international management system that is certified (the clause 4 to 10, the PDCA, the certificate) — the organisation builds it, and the certification body audits it. The OSHA is the must; the 45001 is the market.
Is OSHA used in the UK?
No — OSHA is the US. The UK is the HSE and the HSWA 1974 (the law + the regulation, the prosecution). The US employer who sends the worker to the UK works on the UK law; the UK employer who sends the worker to the US works on the OSHA standard. The ISO 45001 is the one that travels with the site.
What is the ISO 45001?
The international occupational health and safety management system standard, published in 2018. The clause 4 to the clause 10 (the context, the leadership, the planning, the support, the operation, the performance, the improvement), the PDCA, and the certificate (the three years). The 45001 is the system the organisation certifies to — and the certificate is the client, the tender, and the international market.
What is the general duty clause?
The OSHA catch-all: the employer must provide the workplace free from the recognized hazard that is causing or likely to cause the death or the serious harm — even where the specific standard does not cover the hazard. The general duty clause is the US answer to the UK so far as is reasonably practicable.
Which is better: UK HSE, OSHA, or ISO 45001?
The three are not the competitors — they are the three layers. The UK HSE is the law (the duty), the US OSHA is the standard (the enforcement), and the ISO 45001 is the system (the management). The HSE professional who knows the three works in the three — and the international career is the one that holds all three.
Keep reading
Related articles
NEBOSH IGC: What It Is, the Three Papers, and How to Pass
What is NEBOSH IGC? The full form, the three papers (IGC 1, 2, 3), the syllabus, the cost, the time, and the s
Training & Careers · 19 August 2026How to Plan an HSE Career: The Path From Zero to the Role
How to plan an HSE career: the path from zero to the HSE officer role
Risk Assessment · 19 August 2026Hazard vs Risk: The Difference, Explained With Examples
Hazard vs risk, explained: what each term means in health and safety, the difference between hazard and risk w
THE HEALTH AND SAFETY is an education and knowledge network. The articles are free and open; the professional assessments and the training run through umer-hse.pro.
Safety disclaimer
The articles on this blog are practical guidance, built to the UK baseline with the US equivalents named in the text. They do not replace a competent person assessment for high-risk work, a statutory assessment, or the advice of your insurer. Where a duty has legal force — the fire risk assessment, the risk assessment, the COSHH register — the responsible person owns it. Read the article as the preparation, and take the sign-off from the competent person.