In academic and business literature, suppliers providing solutions to their business-to-business (B2B) customers are often described as achieving increased customer retention, higher sales volumes, and enhanced cross-selling. Yet there is limited empirical evidence to support the positive impact of solutions on these customer-related outcomes. Moreover, it is unclear whether suppliers obtain similar outcomes from buyers at different relationship life-cycle stages. This paper aims to address these two gaps and tests the contingency role of the relationship life-cycle in driving future customer outcomes. It proposes that there is a positive effect for solutions provided to recent customers (labeled as “accelerator” role) rather than to established ones (labeled as “leverage” role). Results from a longitudinal analysis of the sales database of a North American company providing solutions to its customers empirically support the “accelerator” role of solutions.