He Could Spend 16 Years Saving for His First Home. A $50,000 401(k) Loan Offers a Shortcut, Then Puts His Retirement at Risk

An NPR report found that a median-income renter household now needs 16 years to save for a down payment and closing costs. That is twice as long as it took in 2019.

Take a hypothetical 50-year-old renter with $500,000 vested in his 401(k). If he follows that timeline, he buys his first home in his mid-60s, close to the age when his paycheck stops.

Waiting has its own cost. The Case-Shiller national index shows home prices up 2.1% year over year. On a $300,000 starter home, a similar increase would add $6,300 to the price and $1,260 to a 20% down payment, pushing his savings goal further away.

How He Can Borrow $50,000 Without a Tax Bill

The tax code treats any plan loan as a taxable distribution unless it meets an exception. Under 26 U.S.C. § 72(p)(2)(A), the cap is the lesser of $50,000 or the greater of half his vested balance or $10,000. The $50,000 figure shrinks if he has carried other plan loans during the prior year. Half of his $500,000 is far more than $50,000, so the $50,000 ceiling is the one that applies to him.

Plan documents can be stricter than the law. Some plans offer no loans at all, and others refuse to extend home-purchase terms.

A Home Purchase Can Push Repayment Past Five Years

Under IRS rules, a 401(k) loan generally must be repaid within five years. But loans used to buy a home that will become the borrower’s primary residence can have a longer repayment period. Payments still have to be made in substantially equal installments, at least quarterly. His plan determines how long the repayment period can run.

The table uses an example loan rate of 8%. It also assumes an example $300,000 30-year mortgage at 6.5%.

On the 10-year schedule he pays about $22,800 in interest, and all of it goes back into his own account. He repays the loan with after-tax pay. He will then owe tax on that same interest again when he withdraws it in retirement.

A Layoff Can Turn the Loan Into a $16,000 Tax Bill

If he leaves his job, his plan may require him to repay the outstanding loan. If he can’t, the remaining balance could be deducted from his retirement account as a plan loan offset. He can avoid tax by rolling that amount into an IRA, but he has to find the cash himself. The deadline is his tax return due date, including extensions.

Suppose he leaves his job at 50 and the entire $50,000 becomes taxable. If it all falls in the 22% federal bracket, he’d owe $11,000 in income tax plus a $5,000 early-withdrawal penalty. That’s a $16,000 bill before state taxes.

The penalty can be avoided if he leaves his employer during or after the calendar year he turns 55. This is the Rule of 55, which doesn’t apply to IRA withdrawals.

Missed payments while he’s still employed can also trigger a taxable distribution if he doesn’t correct the default within the plan’s permitted period. Unlike certain loan offsets after leaving a job, this kind of distribution can’t be rolled into an IRA.

Cutting Contributions Costs More Than the Loan

The lost investment growth on the borrowed money may be relatively small. Assuming a 9% annual market return, an 8% loan rate and monthly repayments reinvested at 9%, the difference comes to about $5,200 over 10 years.

The bigger risk shows up in his budget. Say he covers the $607 loan payment by cutting his 401(k) contributions by the same amount. At that 9% example return, he gives up about $117,000 over the decade. That money is missing just as he reaches the years when catch-up contributions matter most.

Buy Sooner, But Only If He Keeps Saving

For a buyer with steady income, the loan could make homeownership possible years sooner. The interest goes back into his own retirement account, but the payments must fit his budget without sacrificing contributions. Otherwise, buying sooner could leave him worse off in retirement. Before he borrows:

1. Get the plan’s loan policy in writing. Confirm the maximum term for a principal-residence loan, the interest rate formula, and what happens to the loan if he leaves the job. If the plan only allows a 5-year term, the combined payment rises to $2,910.
2. Make sure the full payment meets his budget. If $2,503 a month works only by cutting his 401(k) deferral, the house costs too much for his retirement plan. A smaller mortgage is the fix.
3. Keep cash that matches the tax risk. Having $16,000 outside the plan could cover the federal taxes and penalty in this scenario. But avoiding that bill entirely through a rollover would require enough money to replace the outstanding loan balance.

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