I Am 55 With a $1.5 Million 401(k). Should I Take a 401(k) Loan to Pay for a Home Improvement Project?

Why It Matters

The decision directly affects retirement wealth accumulation and tax liability, making it a pivotal financial choice for high‑net‑worth pre‑retirees.

Key Takeaways

• $1.5M 401(k) exceeds typical retirement benchmark.
• 401(k) loan interest ~7.75% versus 19.6% credit cards.
• Loan repayment required within five years; job loss triggers taxes.
• Loan doesn’t affect credit score and returns interest to self.
• Alternative: HELOC or 0% intro credit card may be cheaper.

Pulse Analysis

Borrowing against a 401(k) has become a go‑to option for high‑net‑worth individuals who need cash quickly, but the decision hinges on rates, repayment terms, and employment stability. At a typical 7.75 % interest rate—derived from the current Prime Rate of 6.75 % plus a point—the loan is markedly cheaper than the average 19.6 % credit‑card APR. Because the interest is paid back into the participant’s own account, the borrower essentially recaptures that cost, turning the loan into a self‑financed line of credit. However, the loan is capped at $50,000 and must be repaid within five years, or it is treated as taxable income.

The tax implications are the most salient risk. If the borrower leaves the employer before the loan is repaid, the outstanding balance becomes a distribution subject to ordinary income tax—about 22 % for a $150,000 salary in 2026—and may also incur the 10 % early‑withdrawal penalty unless the “rule of 55” applies. Moreover, while the loan does not appear on a credit report, it does suspend new contributions, depriving the account of both fresh dollars and compound growth. For a 55‑year‑old with $1.5 million saved, that lost growth could amount to several hundred thousand dollars over the next decade.

Given the profile—substantial retirement assets, stable employment, and a defined home‑improvement need—a modest 401(k) loan can be justified, especially if the project adds equity and the borrower can maintain regular contributions. Still, alternatives deserve scrutiny. A home‑equity line of credit offers larger borrowing capacity but places the home at risk, while a 0 % introductory credit card can be cost‑free if the balance is cleared before the promo ends. Financial advisers typically recommend running a side‑by‑side cash‑flow analysis to confirm that the loan’s net benefit outweighs the opportunity cost of reduced retirement growth.