ILO Convention 100 (global)

The treaty behind every equal-value law

Almost every pay equity statute on this site — Iceland's certification regime, Canada's four-factor Acts, the EU Pay Transparency Directive — descends from one source: the ILO Equal Remuneration Convention, 1951 (No. 100). Adopted when most industrial economies still ran openly separate male and female wage scales, it committed ratifying states to a then-radical principle: equal remuneration for men and women workers for work of equal value.

Two provisions carry the weight. Article 1(b) defines the standard — equal value, not merely the same job — which is what gives the Convention its reach across occupational segregation: a female-dominated job and a male-dominated job can be compared if their demands are equivalent. Article 3 supplies the method: where it would assist, "measures shall be taken to promote objective appraisal of jobs on the basis of the work to be performed." That sentence is the international root of compensable-factor job evaluation. The ILO's supervisory bodies have consistently read it as pointing to analytical comparison of jobs on factors such as skill, effort, responsibility, and working conditions — the same four factors that now appear, almost verbatim, in Canadian statute, South African regulation, South Korean law, and the EU Directive. The ILO has also published the practical method itself: Promoting Equity: Gender-Neutral Job Evaluation for Equal Pay, a free step-by-step point-factor guide with gender-bias checklists that remains the template national tools are built on.

A promotional duty — made enforceable by national law

Convention 100 binds states, not employers. It obliges ratifying countries to promote and, insofar as consistent with their wage-setting machinery, ensure the equal-value principle — but it is not self-executing in most workplaces. Its force comes from transmission: constitutions and labour codes adopt the equal-value phrase, courts interpret it through factor comparison, and proactive regimes (Iceland, Canada, Spain) convert the promotional duty into mandatory, auditable job evaluation.

Ratification is nearly universal — roughly 174 of the ILO's 187 member states, making it one of the most widely ratified conventions in the ILO system. The headline absence is the United States, which has never ratified and whose federal Equal Pay Act remains a substantially-equal-work statute rather than an equal-value one.

The compliance gap: ratified but not aligned

Ratification does not equal alignment, and the gap is where Convention 100 still has work to do. Several major economies listed below — Japan, India, Chile, and Mexico — have ratified the Convention yet their domestic statutes guarantee equal pay only for the same or similar work, not work of equal value. In those jurisdictions there is no legal mechanism that forces dissimilar jobs to be compared, and therefore no job-evaluation mandate; the ILO's supervisory committees regularly note the shortfall. For multinational employers, these gap countries are the places where local law alone is not a reliable guide to group-wide pay equity standards.

How point-factor job evaluation connects

Article 3's "objective appraisal of jobs" is a 1951 description of what point-factor evaluation does:

• Equal value made measurable — scoring dissimilar jobs on common factors is the only practical way to say two different jobs are of equivalent value, which is the Convention's central comparison.
• The global common denominator — because nearly every national regime descends from Convention 100, a factor-based methodology aligned to skill, effort, responsibility, and working conditions translates across jurisdictions: it satisfies the strict regimes and exceeds the lagging ones.
• A forward indicator — the direction of travel in national law (the EU Directive most recently) is from the Convention's promotional language toward mandatory, documented evaluation. Employers who build the discipline before their jurisdictions mandate it are early, not exposed.

Convention 100 set the destination seventy years ago. National laws are still converging on it — and analytical job evaluation is the vehicle they keep choosing.

The law

Official tools and downloads for ILO Convention 100 (global)

Government-published job evaluation tools, guides, and templates — each links directly to the official source.

Frequently asked questions

Ratified, but not yet aligned

These countries have ratified Convention No. 100 but their domestic equal pay laws still stop at "same work" — they do not yet require comparing different jobs of equal value: