This study assesses whether workplace pensions help individuals overcome knowledge barriers to saving for retirement. Using administrative data from Canada and exploiting unique features of the pension system, I find compelling evidence that each $1 contributed to workplace pensions partially crowds out other retirement saving by approximately $0.50—among interior savers—in a regression kink design, centering on unionized workers for methodological reasons. Further analysis indicates that active versus passive decisions are influenced by education, exploiting compulsory schooling reforms for identification. I conclude by showing that pension and education reform are both viable mechanisms for boosting saving from a life cycle perspective.