Inside TIAA’s massive IT transformation to fuel business growth

TIAA's multi-year IT transformation initiative (TETRIS) successfully modernized legacy systems across two phases, reducing tech debt by 50% and enabling 87 business use cases that accelerated product launches by 35% and expanded market reach to 185,000+ non-English speaking customers. By shifting from pure technology modernization to business outcome-driven prioritization and maintaining transparent metrics with leadership, TIAA achieved what many large transformations fail to do—demonstrating clear ROI while positioning the organization for future competitive advantage in a rapidly evolving market. IT leaders should adopt TIAA's phased approach that balances infrastructure modernization with measurable business impact and establish realistic, flexible metrics that maintain stakeholder alignment throughout multi-year transformation initiatives.