To complete an ADP 401(k) loan payoff, log in to your ADP participant portal, generate a payoff quote showing the exact balance owed on a specific date, and send that amount by ACH transfer or mailed check before the quote expires. Paying the loan in full keeps the balance from being reported as a taxable distribution and preserves the money as retirement savings.
Get a Payoff Quote From Your ADP Portal
The payoff quote is the document that tells you exactly what you owe, including interest accrued since your last payroll deduction. You generate it through the same site where you check your balance. Depending on how your employer’s plan is set up, that could be mykplan.com, adptotalsource.voyaplans.com, or the main ADP retirement portal.
After logging in, look for a section labeled “Loans” or “Loan Details.” The payoff quote calculates the total needed to close the loan on a given date. Interest accrues daily, so the number changes slightly day to day. Quotes are typically valid for a limited window, often 30 days, after which you need a fresh one.
If the payoff option is not visible online, call ADP directly. ADP Retirement Services answers at 800-929-2170. The mykplan Participant Call Center runs from 8 a.m. to 9 p.m. ET at 1-800-695-7526. Before you call or log in, have three things in front of you: your Social Security number, the Plan ID that identifies your employer’s program, and the Loan ID assigned to your borrowing. Those identifiers make sure the payment lands in the right account.
Submit the Payment by ACH or Check
ADP plans generally accept payoffs through two channels: ACH transfer from a linked bank account, or a mailed check. Payroll deduction handles your regular scheduled payments, but a lump-sum payoff outside that cycle uses one of these direct methods. The ADP TotalSource plan, for example, processes repayments through payroll deduction or ACH.
If you mail a check, use the address printed on the payoff quote or listed in your portal. That is a processing center or lockbox, not ADP’s corporate headquarters, and sending payment anywhere else can delay processing by weeks. Write your Plan ID and Loan ID on the memo line or the accompanying coupon so the payment is matched to your account.
A cashier’s check is the safest option for a mailed payoff. It clears immediately on receipt, which removes any risk of a bounced payment triggering a default. Most major banks charge between $8 and $15 to issue one. A personal check works, but expect a longer hold before the plan credits your account. Either way, keep a copy of the check or the transfer confirmation in case there is any dispute about when payment arrived.
Processing usually takes five to ten business days after the payment arrives. Watch the participant dashboard for the loan status to change from “Active” to “Paid” or “Closed.” Save the plan’s confirmation notice with your tax records.
Partial Prepayments Are Not Allowed
If you were hoping to chip away at the balance rather than pay it all at once, ADP’s system will not accommodate that. Under the ADP TotalSource plan, participants can prepay in full at any time without penalty, but partial principal-only payments are not permitted. Your scheduled repayments continue on the original amortization until you either pay off the entire balance or reach the end of the term. This is a plan administration rule rather than an IRS requirement. Some other recordkeepers allow partial prepayments, but with ADP the choice is all or nothing.
Pay It Off Before You Leave the Employer
This is where most people run into trouble. When you separate from the employer that sponsors your 401(k), payroll deduction stops. Most plans then require full repayment of the outstanding balance immediately or within a short window, commonly 60 to 90 days after your separation date. The exact deadline is set by your plan, so check the loan policy or summary plan description.
If you know you are about to leave, paying off the loan before your last day is the cleanest path. Once payroll deduction ends, you are working against a deadline that varies by plan and is easy to miss. If you cannot pay it off before leaving, request the payoff quote and send funds during whatever grace period your plan provides.
The Cure Period
Under Treasury regulations, a missed installment does not violate the repayment rules if you make it up by the end of the calendar quarter following the quarter in which it was due. A payment due in February can be cured by June 30. That regulatory cure period sets an outer boundary; your plan can impose a shorter one, and after separation the plan’s own deadline usually controls.
What Happens if You Don’t Pay It Off
An unpaid 401(k) loan becomes taxable income in the year of the default or offset. The plan reports the unpaid balance on Form 1099-R, and you owe federal income tax on the full amount at your ordinary rate.
The mechanics differ depending on when the default occurs. A deemed distribution happens when you default on scheduled payments while still employed (or within the cure period). The IRS treats the unpaid balance as if you received it, but the loan technically stays on the books. A plan loan offset is different: the plan actually reduces your account balance to repay the loan, which typically happens at separation. The offset is a real distribution, not just a paper one.
The 10% Early Withdrawal Penalty
If you are younger than 59½ when the default or offset occurs, a 10% additional tax applies on top of ordinary income tax under IRC Section 72(t). One important carve-out is the “Rule of 55”: if you separate from service during or after the calendar year you turn 55, distributions from that employer’s plan are exempt from the 10% penalty. The exception covers only the plan sponsored by the employer you actually left, not IRAs or plans from prior employers. So at 56, an offset would still be taxed as income but would not carry the extra 10%.
Rolling the Offset Into an IRA
If the plan offsets your account for an unpaid loan after you leave, you can still avoid the tax bill by rolling that amount into an IRA or another eligible retirement plan. You have to come up with the cash yourself, since the plan already took the money from your account, but depositing an equal amount into an IRA replaces the offset and preserves its tax-deferred status.
The rollover deadline depends on whether the offset is a “qualified plan loan offset,” or QPLO. A QPLO is an offset that happens because you separated from service (or the plan terminated) and the loan was in good standing immediately before that event. For a QPLO, you have until your tax return due date, including extensions, to complete the rollover. That typically means April 15 of the following year, or October 15 with an extension. If the offset does not qualify as a QPLO, for instance if the loan was already in default before you left, the standard 60-day rollover window applies.
A Completed Payoff Avoids All of This
A loan paid off in full does not generate a 1099-R, does not trigger income tax, and does not carry a penalty. The money stays in your account and continues to grow tax-deferred. That is the whole reason the payoff quote and the timing around it matter: getting the exact number, sending the exact amount, and confirming the plan has closed the loan.