Lu, Timothy JunMitchell, Olivia SUtkus, Stephen PYoung, Jean A2023-05-232023-05-232015-04-012019-06-26https://repository.upenn.edu/handle/20.500.14332/44159Tax-qualified retirement plans seek to promote saving for retirement, yet most employers permit pre-retirement access by letting 401(k) participants borrow plan assets. This paper examines who borrows and why, and who defaults on their loans. Our administrative dataset tracks several hundred plans over 5 years, showing that 20% borrow at any given time, and almost 40% do at some point over five years. Employer policies influence borrowing behavior, in that workers are more likely to borrow and borrow more in aggregate, when a plan permits multiple loans. We estimate loan default “leakage” at $6 billion annually, more than prior studies.Opinions and conclusions expressed herein are solely those of the authors and do not represent the opinions or policy of the SSA, any other Federal agency, or any institution with which the authors are affiliated. Opinions and errors are solely those of the authors and not of the institutions providing funding for this study or those with which the authors are affiliated. © 2015 Jun, Mitchell, Utkus, and Young. All rights reserved. All findings, interpretations, and conclusions of this paper represent the views of the authors and not those of the Wharton School or the Pension Research Council. © 2015 Pension Research Council of the Wharton School of the University of Pennsylvania. All rights reserved.D14, D04, D09, H24, J2retirement plan loanretirement wealthhousehold debtloan defaultconsumptionbuffer-stockEconomicsWorking Paper