His 2.75% Adjustable Mortgage Is Resetting After Seven Years. A $100,000 401(k) Withdrawal at 55 Could Net Just $68,000
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A 55-year-old homeowner locked in a seven-year adjustable-rate mortgage at 2.75%, and that fixed period is ending. He wants to pull $100,000 from his traditional 401(k) and pay down the balance before the new rate kicks in.
Plenty of borrowers face the same reset. The Wall Street Journal reported on October 28 on a Minneapolis-area borrower whose seven-year ARM is resetting. Our homeowner is a separate, hypothetical case. The rate environment explains the pressure: the 10-year Treasury yield sits near 4.8% after spending most of October around 5%.
Why $100,000 Becomes Just $68,000
Say he files jointly and has $105,000 in taxable income before the withdrawal. The 401(k) money counts as ordinary income and sits on top of that, which brings his taxable income to $205,000.
For 2026, the 22% bracket for joint filers covers income from $100,800 to $211,400.
That puts every dollar of the withdrawal at 22%, which works out to $22,000 in federal tax.
Then comes the IRS’s 10% additional tax on early retirement-plan withdrawals, which adds another $10,000. That adds $10,000, and he walks away with about $68,000. If his state taxes income, he keeps less.
Why Age 55 Doesn’t Automatically Avoid the Penalty
The penalty is waived for employer-plan withdrawals only if you leave that job in or after the year you turn 55. IRS Publication 575 gives the example of a worker who separated from service at age 49 and took money out at 55. He still owed the penalty.
Our homeowner left his last employer at 53. Turning 55 does nothing for the money in that old plan, so the full penalty applies. The exception also covers employer plans only. Roll the money into an IRA and it no longer applies.
Will Paying Down the Mortgage Actually Lower His Payment?
Here is an example. He owes $320,000 with 23 years left. At 2.75%, his payment is about $1,566 a month.
If his loan’s rate caps allow a reset to 6.75%, the payment rises to about $2,286, roughly $720 more each month.
On most loans, an extra principal payment cuts the term and leaves the monthly payment the same. Some ARMs recalculate the payment from the remaining balance at each adjustment, so a paydown before the reset would lower it automatically. His loan note says which kind he has.
A recast also recalculates the monthly payment after a lump-sum principal payment. If the lender re-amortizes his remaining $252,000 over 23 years at 6.75%, the payment falls to about $1,800, saving roughly $486 a month compared with the reset without a paydown. Refinancing replaces the loan entirely, which means new closing costs and a new term, priced off today’s higher rates.
Retirement Savings He Won’t Get Back
Left invested at an example 7% annual return, that $100,000 would grow to about $197,000 by age 65.
Taking it out turns it into $68,000 of home equity. That paydown saves interest at his mortgage rate, but he can access the money again only by selling or borrowing.
The trade is expensive for someone who’s only 55. According to Redfin, Americans ages 55 to 69 already hold roughly 35% of the nation’s real estate wealth. Moving more of his net worth into the house leaves him less cash to handle a layoff, a medical bill, or a bad market at 62.
Run These Numbers Before Handing $32,000 to the IRS
In our scenario, the reset adds about $720 a month to his mortgage payment. Using $68,000 to pay down the balance could cut that increase by roughly $486 a month. But he’d sacrifice $32,000 to federal taxes and penalties upfront, a steep price for that monthly relief.
- Get the reset terms in writing. Ask your servicer for the index, the margin, the rate caps, and whether the loan recalculates the payment at adjustment or allows a recast. Check whether the lifetime cap sits well above the current market rate.
- Check your separation date before touching the 401(k). If you left the employer sponsoring the plan before the year you turned 55, the exception won’t protect your withdrawal. Leaving in or after that year can eliminate the penalty, provided the money stays in that employer’s plan.
- Cover the gap with other money first. Pay the roughly $720 monthly increase from cash flow or a taxable brokerage account. If you still want to pay down the loan, a recast with taxable savings gets most of the payment relief without paying the penalty.
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Gerelyn Terzo is the author of dividend investing handbook "Dividend Investing Strategies: How to Have Your Cake & Eat It Too." A veteran financial journalist, she covers agri-finance for outlets like Global AgInvesting and the broader stock market and personal finance for 24/7 Wall Street. She began at CNBC and later helped launch Fox Business in New York. Gerelyn currently resides in Woodland Park, Colorado and dabbles in nature photography as a hobby.
