Student loan debt doesn't just squeeze a young physician's monthly budget — new Employee Benefit Research Institute (EBRI) research suggests it can leave a lasting mark on retirement savings that never fully heals. Drawing on five years of 401(k) plan data matched against credit bureau records, EBRI set out to answer a question that's mostly been anecdotal until now: Does carrying student debt actually change how, and how much, people save once they're eligible for a 401(k)? The data span 2019 through 2023 and cover well over 1 million participant-year observations, giving EBRI a far larger and more granular picture than prior survey-based estimates. The answer turns out to be yes, significantly, and the pattern holds up whether you're 28 or 58.