The objective of this article is to analyze how the self-financed pension replacement rate would be affected by measures such as increasing the contribution rate, raising the retirement age and increasing the density of contributions. For this, simulations are carried out that provide replacement rates under different alternatives. The conclusion is that the first two measures (increase the contribution rate and the retirement age) are necessary and desirable, but if they are not accompanied by an increase in the last (contribution density) the pension issue will remain open, because a significant percentage of the population will continue with very low pensions.