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Most talent management tools do integrate with the HRIS and payroll you already run, and the connection is a set of data flows moving in specific directions rather than a single switch. The foundational flow runs from the HRIS into the talent tool: employee names, jobs, locations, employment status, and the reporting hierarchy that decides who reviews whom, synced on a schedule so the tool always works against the current roster [1][2][4]. Results then travel the other way, with completed reviews, ratings, and pay recommendations written back toward the HRIS and payroll, and the compensation handoff is the highest-stakes link because an approved increase that reaches payroll with the wrong number or the wrong effective date becomes a pay error [7]. Where performance and compensation are native modules of the HRIS suite itself, as in Workday or BambooHR, there is no integration to build because talent and payroll already share one worker record [8][9]. Standalone tools such as Lattice, 15Five, and Culture Amp connect through a certified connector, an open API with webhooks, unified-API middleware, or a flat file, and the failure you plan for is org-hierarchy drift rather than a broken pipe [3][5][6].