Retirement Planning: The Hidden Costs of Paying Off Your Mortgage with Your 401(k)

When it comes to retirement planning, many individuals face a dilemma: should they use their 401(k) savings to pay off their mortgage, or keep their money invested to continue growing their nest egg? While paying off a mortgage can provide a sense of security and peace of mind, it's essential to consider the potential long-term costs of doing so.

The Opportunity Cost of Paying Off Your Mortgage

Paying off a mortgage using 401(k) savings can trigger a significant tax bill, potentially pushing individuals into a higher tax bracket. According to the IRS, a married-filing-jointly household crosses into the 24% bracket at $211,400, the 32% bracket at $403,550, and the 35% bracket at $512,450 for the 2026 tax year. A single filer hits 35% at $256,225. This means that withdrawing $300,000 from a traditional 401(k) to erase a mortgage could result in a substantial tax bill, potentially exceeding $100,000. Moreover, paying off a mortgage using 401(k) savings means permanently removing money from a compounding engine that has been growing for decades. This can result in a significant loss of potential returns, as the money withdrawn from the market no longer participates in the compounding process.

Three iShares Funds to Consider

Fortunately, there are three iShares funds that can help individuals keep their 401(k) savings invested while still providing the emotional cover they were chasing: the iShares Core S&P 500 ETF (IVV), the iShares Core Dividend Growth ETF (DGRO), and the iShares MSCI USA Min Vol Factor ETF (USMV). IVV tracks the S&P 500 at a 0.03% net expense ratio, meaning $9,997 of every $10,000 stays at work. It pays a quarterly distribution, with a trailing 12-month total of $8.19 per share and a most recent payment of $1.995653. Over the past year, the fund is up 19.43%. DGRO, on the other hand, screens for U.S. companies with sustained dividend growth, charges a 0.08% expense ratio, and pays quarterly. Its trailing 12-month distribution totals roughly $1.48 per share, and the payment stream has climbed over the decade, from $0.169024 in September 2014 to $0.330603 in June 2026. Shares are up 14.14% year to date and 19.75% over the past year. USMV is engineered for drawdown anxiety, holding a diversified basket of lower-volatility U.S. equities, with $22.86 billion in net assets spread across defensive names like Johnson & Johnson, Berkshire Hathaway, Coca-Cola, and Verizon, alongside measured technology exposure. Its one-year return of 7.85% trails IVV, which is the point.

Why a Blended Allocation Makes Sense

While paying off a mortgage can provide a sense of security, a blended allocation of IVV, DGRO, and USMV can recreate the calm you were hoping to buy with the payoff. This approach allows individuals to keep their 401(k) savings invested while still providing a growing income stream and a lower-volatility sleeve to help prevent panic-selling during market volatility.

Retirement Planning Doesn't Have to Feel Overwhelming

Retirement planning can be complex, but it doesn't have to feel overwhelming. By finding expert guidance and using tools like SmartAsset's simple quiz, individuals can connect with a vetted financial advisor and create a personalized retirement plan that meets their unique needs and goals.

Conclusion

Paying off a mortgage using 401(k) savings may seem like a smart move, but it can come with significant long-term costs. By considering a blended allocation of IVV, DGRO, and USMV, individuals can keep their 401(k) savings invested while still providing a growing income stream and a lower-volatility sleeve. With the right guidance and tools, retirement planning doesn't have to feel overwhelming.