Refers to individuals who are working. The notion of work applies to all activity carried out with remuneration or benefit, that is, all remunerated work in the context of an employer-employee relationship or all independent work. It can equally be applied to an unpaid job in the family (family support).

The population engaged in work activity is also classified in relation to hours dedicated weekly to working.

- Overemployed: People in continuous employment who have worked 45 or more hours in the week that the survey refers to.

- Strictly employed: People who work between 15 and 44 hours per week who are mainly in an on-going job.

- Underemployed: People in an ongoing job who habitually work less than 15 hours per week.

- Marginally employed: Includes people basically engaged in non-work activity and who have a minimum participation during the week in marginal work activities, such as family support, seasonal work or occasional work, who declare that they are not seeking more work.

- Quasiunemployed: those people in a work situation similar to that of the marginally-employed, but distinguishing themselves in that they state that they are seeking work.