Autocratic leaders differ considerably in how they consolidate power, but what gives rise to these variations remains under-theorized. This article studies how informal political constraints associated with retired leaders shape intra-elite power dynamics. We argue that ageing leaders' efforts to manage the succession problem create an important yet impermanent check on the power of subsequent leaders. To test this argument, we use the massive text corpus of Google Ngram to develop a new measure of power for a global sample of autocratic leaders and elites and employ a research design that leverages within-incumbent variations in former leaders' influence for identification. We show that incumbent leaders' ability to consolidate power becomes more limited when operating in an environment where influential former leaders are present. Further analyses suggest that the presence of former leaders is most effective in reducing incumbents' ability to appoint or remove high-level military and civilian personnel unilaterally. These findings have implications for our understanding of the dynamics of power-sharing and institutional change in autocracies.