You can use your 401(k) to pay off student loans, either by taking a loan against your vested balance or by taking an early withdrawal, but each route has costs that can shrink what actually reaches your servicer. A loan keeps the money in your retirement system if you repay on schedule. A withdrawal is permanent and, before age 59½, usually triggers income tax plus a 10% additional tax.
Borrowing From Your 401(k)
A 401(k) loan lets you borrow from your own retirement contributions and pay yourself back with interest, generally through payroll deductions. The cap is the lesser of $50,000 or 50% of your vested balance, though many plans let you borrow at least $10,000 even when that exceeds half your balance. Other outstanding loans from the plan in the past year can reduce this limit.1IRS. IRS 401(k) Plan Fix-It Guide
For a loan used to pay off student debt, repayment typically cannot exceed five years.1IRS. IRS 401(k) Plan Fix-It Guide If you leave the employer or miss payments, the unpaid balance can be treated as a distribution. When that happens before age 59½, you generally owe income tax and the 10% penalty on the taxable portion.2Congressional Research Service. 401(k) Plan Participant Loans
Taking a Withdrawal Instead
A withdrawal permanently removes funds from the plan. Whether you can take one for student loans depends on your plan and your age.
Hardship distributions are limited to an immediate and heavy financial need. The IRS “safe harbor” list of qualifying needs includes tuition, related educational fees, and room and board for the next 12 months of post-secondary education. Paying off existing student loans is not on that list, so whether your plan allows it comes down to the plan’s own rules.3IRS. Retirement Topics – Hardship Distributions – Section: Immediate and heavy financial need
If you have reached age 59½, some plans allow in-service withdrawals while you are still working. You can generally only take the portion of your account in which you are vested.4IRS. When Can a Retirement Plan Distribute Benefits – Section: 401(k), profit-sharing, and stock bonus plans
What It Costs in Taxes and Penalties
Under Section 72(t), an early withdrawal usually carries a 10% additional tax on top of ordinary income tax. On a $30,000 withdrawal that is fully taxable, that penalty alone is $3,000. The taxable portion is added to your gross income for the year, which can also push you into a higher bracket.5IRS. Tax Topic No. 558 Additional Tax on Early Distributions from Retirement Plans Other Than IRAs
There is also mandatory withholding to plan for. If a distribution is eligible for rollover but paid directly to you, the plan administrator generally must withhold 20% for federal income tax. A $30,000 request would arrive as $24,000 in your hands.6Office of the Law Revision Counsel. 26 U.S.C. § 3405 Between the withholding, the eventual tax bill, and the 10% penalty, a large share of the money you pull out never makes it to the loan balance you were trying to clear.