Loans are written into the plan, not into the Roth
There is nothing in the nature of a designated Roth account that creates or blocks a loan. Loans exist because an employer chose to include them in a defined contribution plan and wrote a loan policy to govern them. That policy sets the minimum and maximum amounts, the number of loans you may have at once, the term, the interest rate method, whether repayment is by payroll deduction only, and whether a spouse's consent is required.
The part most people miss is that the policy also decides which money leaves. Some plans let you designate the source — borrow from pre-tax, leave Roth untouched. Others draw pro-rata across every source in your account, which means a loan you think of as "borrowing from my 401(k)" quietly removes Roth dollars too. Others exclude the Roth source from loans entirely. Three plans, three different answers, same question.
So the first thing to read is not an IRS page. It is your plan's loan policy or the loan section of the summary plan description, and then a call to the recordkeeper to confirm how sources are allocated. Everything downstream of that — cost, risk, timing — changes depending on which of those three designs you are standing in.
A plan loan is a payroll product, and payroll ends
Repayment on a plan loan almost always runs through payroll deduction. That is the mechanism. When employment ends, the mechanism ends. Most plans then require the balance in full within a short window, or treat the unpaid amount as distributed. Some plans permit continued repayment after separation by direct payment; many do not, and you cannot tell which without asking.
This is why the term on the paperwork is not the real term. If you take a loan two years before the date you intend to retire, on a term longer than that gap, you have not taken a multi-year loan. You have taken a two-year loan with a balloon payment on your last day of work — and the balloon is due at the exact moment your income stops. Non-residential plan loans are also subject to a maximum term set by statute; confirm the current limit and how your plan applies it before assuming a schedule.
The reversibility line sits here. Up until separation, a loan is a fully reversible transaction — you repay it and the account is whole. After the balance is offset against your account, the money is out, and the only route back is a rollover of the offset amount into another eligible account within the permitted window. That window and the rules for rolling over a plan loan offset are worth confirming against current IRS rollover guidance, because it is the one door that closes on a clock rather than on a decision.
Roth dollars are the most expensive dollars to take out, for a reason that has nothing to do with tax
Suppose the loan is repaid perfectly and on schedule. Nothing was taxed, nothing defaulted. There is still a cost, and it is structural rather than tax-related: the Roth wrapper has a filling rate and a finite number of years left.
You can only put money into a designated Roth account out of a paycheck, up to an annual limit, in years when you are still employed by that plan's sponsor. A loan repayment restores the dollars — but the dollars that were outside the account during the loan were not compounding tax-free, and you cannot buy that time back by contributing extra later, because the annual limit caps what you can add. For someone with two or three working years remaining, the Roth space you have left is the scarcest thing on your balance sheet. Interest you pay goes back into your own account, but it arrives as earnings inside the wrapper, not as a contribution, and its eventual tax treatment follows the same qualified-distribution rules as everything else in the account.
That is the trade to weigh: pre-tax dollars borrowed and repaid cost you growth on money that will be taxed on the way out anyway. Roth dollars borrowed and repaid cost you growth on money that was supposed to come out untaxed for the rest of your life. Same interest rate, different asset.
An unpaid Roth loan is not taxed the way an unpaid pre-tax loan is
When a plan loan is not repaid, the outstanding balance is generally treated as a distribution. For a pre-tax balance, that means the whole amount becomes taxable income in that year. For a designated Roth balance, the shape is different: the account already holds after-tax contributions plus earnings, and a distribution from it is broken into those two components. A non-qualified distribution generally hits only the earnings portion with income tax, and an additional tax may apply on that portion depending on age and circumstances.
This is genuinely favourable relative to a pre-tax default, and it is also the reason people underestimate it. The tax bill is small, so the event feels small. What actually happened is that a permanent piece of your tax-free retirement account left the plan in a year you did not choose, and it can only return through a rollover inside a limited window. The tax is the smallest part of the loss.
Whether the distribution is qualified turns on the five-year clock attached to your Roth account and a qualifying event — both of which have their own rules, and both of which are worth reading directly from current IRS guidance rather than from a recordkeeper's summary screen. The clock is also the thing that behaves unexpectedly when Roth money moves between a plan and a Roth IRA, which is covered separately.
No one in the chain owns the interaction between the loan and the retirement date
The recordkeeper administers the loan. It will tell you the payment, the term, and the balance. It will not ask what year you plan to stop working. The HR team can send you the loan policy but is not tracking your retirement date against your amortisation schedule. A CPA sees the consequence the following spring, on a form, after it is finished. An adviser managing your outside portfolio may never see the plan account at all, and often cannot see the loan source breakdown even if they do.
That leaves one person holding the only fact that makes the decision safe or unsafe: you. And the fact is a date. Not "roughly when I retire" — the date the last payroll deduction can physically be taken.
This is the pattern behind most transition damage. Every individual decision was defensible in isolation. A loan at a reasonable rate is defensible. Retiring at the age you planned is defensible. The failure sat in the seam between them, and no professional in the chain had both halves on the same page. When you are checking who you are relying on for the outside pieces, it is worth confirming how they are registered and paid before assuming the plan account is inside their scope.
The real comparison is not the interest rate
People compare a plan loan to a home equity line or a card by rate. Rate is the least informative number here. What differs is what each option does under stress and what each one takes from you permanently.
A plan loan carries an acceleration trigger tied to employment, which is precisely the variable most likely to change in the years before retirement. A home equity line is not accelerated by leaving a job, but underwriting typically looks at income, so opening one after retirement is a different exercise than opening one while employed. Selling from a taxable account triggers gains but nothing accelerates and nothing defaults. Cash from savings costs the least in mechanics and the most in buffer. Each of these has a different worst case, and the worst cases are what matter in a year when your income structure is changing.
There is also a sequencing question that only exists in a narrow window. Loan access lives with the plan, so a rollover to a Roth IRA ends it. If a rollover is already in motion and a cash need is on the horizon, those two decisions are one decision, and the order is not reversible once the money has left the plan.
What to actually do
- Pull the plan's loan policy or the loan section of the summary plan description and read three specific things: whether the designated Roth source is loanable, whether loans are drawn pro-rata across sources, and whether repayment can continue after separation from service.
- Write down the date of your last expected payroll cycle, not the year you plan to retire, and compare it to the loan's final scheduled payment. If the loan outlasts the paycheck, treat the difference as a balloon payment coming due on that date.
- Ask the recordkeeper in writing what happens to an outstanding balance on separation: full repayment window, offset, or continued direct payments — and get the answer from the plan, not from a general article.
- Confirm the current rules for rolling over a plan loan offset amount, including the time limit, directly from IRS rollover guidance, so you know the size of the recovery window before you need it.
- Separate the tax question from the space question. Price the tax on a possible non-qualified distribution, then separately count how many remaining years of paychecks you have to refill the Roth account under the annual limit.
- Lay the plan loan beside your other funding routes and compare them on what triggers acceleration or default, not on the stated interest rate.
- If a rollover of the designated Roth account to a Roth IRA is under consideration in the same period, decide the loan question first — the rollover permanently removes the borrowing option.
How this shows up
Someone two years from an intended retirement takes a plan loan on the longest term the policy allows, on the reasoning that a longer term means a smaller payment. The plan requires full repayment shortly after separation. The retirement date arrives, the balance is offset, a portion of it is taxable earnings, and a permanent slice of the tax-free account is now outside the wrapper. The rate was fine. The calendar was the problem.
A participant intends to borrow only against pre-tax money and leave the Roth alone. The plan allocates loans pro-rata across all sources. Roth dollars leave alongside pre-tax dollars, and the participant discovers this on a statement months later, when the question of which dollars were out of the market is no longer answerable in a useful way.
A retiree completes a rollover of a designated Roth account into a Roth IRA, then faces an unexpected expense the following quarter. The IRA cannot lend. The plan that could have lent no longer holds the money. Neither decision was wrong on its own; they were made in an order that could not be undone.
Frequently Asked Questions
No. IRAs cannot lend money to their owners, and a Roth IRA is an IRA. The only borrowing-like feature that exists in the IRA world is the ability to roll over a distribution within a limited period, which has strict rules and per-year restrictions. Confirm those rules against current IRS rollover guidance before treating a distribution as a short-term bridge.
Generally not. Source allocation is set by the plan's loan policy, not by participant preference, and the recordkeeper administers what the document says. Your options are to accept the allocation, borrow a smaller amount so that fewer Roth dollars are involved, or fund the need somewhere else.
No. Loan repayments are not contributions, so they do not use up your annual limit — and they do not create extra room either. The dollars come back, but the years those dollars spent outside the account cannot be replaced by contributing more later, because the annual limit caps what you can add.
The unpaid balance is generally settled against the account, which reduces what passes to your beneficiaries, and the tax character of that reduction follows the Roth basis-and-earnings split. Beneficiary withdrawal rules are separate and depend on who inherits. Both pieces are worth confirming against current IRS beneficiary guidance rather than assumed.
They are different instruments with different permanence. A loan is reversible while you are employed and accelerates when employment ends. A withdrawal, if the plan even permits one, is not reversible and permanently reduces the tax-free wrapper. Which cost matters more depends on facts about your timing and income that no general answer contains.