The 2008 reform of the pension system introduced a series of measures aimed at strengthening its three pillars: the redistribution pillar, the mandatory savings pillar and the voluntary savings pillar. One of these measures made it mandatory for self-employed workers to contribute to the pension system. Since the measure was first introduced in 2012, and up to the 2017 tax year, 1,017,360 individuals had been benefited, with an average of 248,254 individuals per year. The average coverage in this period was 26%. 95% of individuals included in this measure had contributed for 2 or less periods since its introduction.

67% of the individuals who contributed had already contributed at least once in the year in which they generated income, i.e. the measure complemented their social security savings. Moreover, in the years of evaluation, an average of 14% of individuals who did not stop contributing had not been previously affiliated to the pension system.

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