Foreigners contribute only 5.19% of Spain's income tax despite being 14% of the population

Foreigners: 14% of the population, 5% of income tax. Why?

The Tax Agency's 2024 data are stubborn: foreign citizens account for 14.06% of Spain's population but contribute barely 5.19% of total personal income tax revenue. In absolute terms, €6,894 million out of a total of €132,861 million. Their proportional contribution is only 36.9% of what it would be if their fiscal weight matched their demographic weight.

Low-paid jobs and a lower filing obligation

The most immediate explanation is the labour structure of the immigrant population. They tend to hold lower-paid jobs – hospitality, care work, delivery, the informal economy – and a significant share do not even reach the minimum threshold for filing a tax return. According to the data, only 1.4 million foreigners filed an income tax return, compared with the 7.2 million residing in Spain excluding naturalised citizens. The wage gap inevitably translates into a revenue gap.

The debate over the real census and naturalisations

Some analyses question the official figure of 14% foreign population. They argue that counting naturalised citizens as Spaniards underestimates the real weight of immigration. According to demographic projections, the native non-immigrant population would be around 34-36 million, not the 43 million that would result from subtracting 7 million foreigners from 50 million inhabitants. If the immigrant community (including naturalised citizens) were around 30% of the population, their fiscal contribution would be even more disproportionate.

Pensions and net fiscal balance: the pending issue

The official narrative promised that mass immigration would ease the Social Security deficit. However, the income tax data suggest the opposite: low contributions from reduced wages, which do not cover the benefits received (healthcare, education, social services). International studies, such as those conducted in Denmark, conclude that the net fiscal balance of non-EU immigration is negative. In Spain, the absence of an official assessment prevents closing the debate, but the available figures do not point to a net benefit for public coffers.

Bottom line: With these ingredients, that old phrase about immigrants coming to pay for our pensions sounds more like a mantra than a proven reality. The income tax data are just one piece, but they reveal a mismatch that no accounting adjustment will fully paper over.