Playing Catch-up with Health Savings

We use comprehensive tax data to study how saving behavior responds to the Health Savings Account (HSA) “catch-up” contribution provision, which raises HSA contribution limits for individuals aged 55 and older. Using a regression discontinuity design, we find a sharp increase in contributions among those previously near the limit and smaller increases among unconstrained savers. Induced contributions are not immediately withdrawn and do not appear to crowd out retirement savings. Responses are strongest among payroll contributors and long-term savers. However, married couples do not appear to coordinate their HSA behavior to take advantage of the complex spousal rules governing catch-up contributions. Our findings highlight how tax incentives shape HSA saving and suggest that tax-advantaged account design meaningfully affects household financial behavior.