![\"Why](\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2026\/05\/Untitled-design-2024-11-26T140549.423.jpg\")
\t<\/p>\n\t\t<\/p>\n
\u00a9 MariaDubova from Getty Images and c-George from Getty Images Pro<\/p>\n
A 50-year-old I will call Sarah has $750,000 in her 401(k), a daughter starting an expensive nursing program, and a kitchen untouched since 1998. Her plan administrator says she can borrow $50,000 at roughly 8%, with interest paid back to her own account. Against a 21% credit card or a HELOC, it sounds obvious.<\/p>\n
She is not alone. Fidelity data shows 19.5% of 401(k) savers carry a loan balance, jumping to 25.9% for Gen X. With the personal savings rate down to 3.7% from 6.2% two years ago, the temptation is structural.<\/p>\n
I would tell Sarah to leave the money where it is. Here is the math she is not seeing.<\/p>\n
The real cost is forgone compounding<\/p>\n
Sarah compares 8% she pays herself to 21% on a credit card. The real cost is the return that $50,000 would have earned inside the plan over 17 years until age 67.<\/p>\n
SPDR S&P 500 ETF Trust (NYSEARCA:SPY<\/a>), the most common S&P 500 proxy in 401(k) menus, has returned 80% over five years and 259% over ten. Assume 10% annualized forward return. $50,000 left in the account compounds to roughly $253,000 by age 67.<\/p>\n If she takes the loan, repays principal plus interest of about $60,000 over five years, and lets that sit until 67, she ends with closer to $188,000. The gap is about $65,000, even though she repaid every dollar on time to herself.<\/p>\n The contribution trap<\/p>\n A borrower with a five-year repayment of roughly $12,000 a year discovers her take-home is squeezed and quietly cuts her 401(k) deferral. Cut contributions by $8,000 a year and a typical 4% employer match disappears, since most plans only match what you defer.<\/p>\n Over five years that is roughly $55,000 of contributions plus match that never enter the account. Compounded to 67, the foregone balance is around $110,000. Even if Sarah cuts her deferral by half that, the damage easily clears $50,000.<\/p>\n Add the two leaks together and the \u201ccheap\u201d loan has quietly cost her north of $100,000 by retirement. Clark Howard\u2019s framing is cleanest: \u201c401k loans are best used only for a catastrophe, a catastrophic circumstance that there\u2019s no other way to pay for, not a temporary cash flow problem.\u201d<\/p>\n Two landmines that turn a loan into a distribution<\/p>\n Sarah is 50, below the Rule of 55<\/a> cutoff. If she loses her job before fully repaying, most plans demand the outstanding balance by the following October\u2019s tax filing deadline. Miss it, and the unpaid amount becomes a deemed distribution, taxed as ordinary income and hit with the 10% federal penalty.<\/p>\n The second landmine is double taxation on interest. She repays the loan with after-tax dollars, then pays ordinary income tax again when she withdraws that money in retirement. It is not enormous on a single loan, but it is real.<\/p>\n What to do instead<\/p>\n Reprice the actual borrowing decision. A home equity line at current rates, even at 8% to 9%, leaves her 401(k) compounding untouched. The deductibility of HELOC interest used for home improvements can drop the effective rate further. The right comparison is the HELOC against the 21% card and the 401(k) loan together. Sarah\u2019s $50,000 problem is real. The 401(k) loan solves it for 60 months and bills her for the next 17 years. Better answers exist.<\/p>\n
\nProtect the catch-up first. The 2026 employee deferral limit is $24,500, with an $8,000 catch-up once she turns 50. If her 2025 wages exceeded $150,000, that catch-up must land in a Roth 401(k) under the SECURE 2.0 rule effective January<\/a>. Do not let a loan repayment crowd out the catch-up. That bucket is the most tax-advantaged dollar she will contribute this decade.
\nPark the emergency fund where it earns. The FDIC national average 12-month CD is 1.65%, but top online banks routinely pay 3 to 5 times. A six-month buffer in a high-yield account<\/a> is the single most effective vaccine against needing a 401(k) loan.<\/p>\n