The article presents an insight into the old age pension system in Spain. The introduction is followed by such a topic paragraphs as: the general information about the country, the historical development of its pension system, the present situation and challenges, and foreseen changes. There, the author's goal was to present both past and present solutions employed by the Spanish pension system, in search for ideas worth consideration in international comparisons. In the summary, the author highlights as a particular Spanish approach, on the background of other countries, the fact of existing in the Spanish reality the special old age pension system for domestic servants.