The general conclusion of the empirical literature is that in-market consolidation generates adverse price changes, thereby harming consumers. Previous studies, however, look only at the short-run pricing impact of consolidation, ignoring all effects that take a longer time to materialize. Using a database that includes detailed information on the deposit rate paid by individual banks in local markets to different categories of depositors, we investigate for the first time the long-run pricing effects of M&As. We find strong evidence that, although in the short run consolidation generates adverse price changes, these are only a temporary phenomenon. In the long run efficiency gains dominate over the market power effect of mergers, leading to more favorable prices for consumers.