A 401(k) corrective distribution is money your plan sends back to you because contributions to your account crossed a line the IRS draws, either because you personally deferred more than the annual limit or because the plan failed one of the fairness tests it has to pass each year. For 2026, the basic elective deferral limit is $24,500, and going over it forces a refund of the excess plus any investment earnings it produced.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Handling the tax side correctly matters, because a late correction can result in the same dollar being taxed twice with no way to recover it.
Why You Received One
There are three common triggers, and knowing which one applies determines how the refund is taxed.
You Exceeded the Annual Deferral Limit
The IRS caps how much you can defer into all your 401(k)-type plans combined during a calendar year. For 2026, that cap is $24,500. If you’re 50 or older, you can defer an additional $8,000 in catch-up contributions, for a total of $32,500. Under a SECURE 2.0 provision, participants aged 60 through 63 get a higher catch-up limit of $11,250, bringing their total to $35,750.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
This trips up people who change jobs mid-year and contribute to two separate plans. Neither employer sees what you deferred at the other company, so it falls on you to notice the overage and ask one plan to return the excess before the April 15 tax deadline.2Internal Revenue Service. Retirement Topics – What Happens When an Employee Has Elective Deferrals in Excess of the Limits
The Plan Failed a Nondiscrimination Test
Most 401(k) plans have to pass two IRS fairness tests every year. The Actual Deferral Percentage (ADP) test compares the average deferral rate of highly compensated employees (HCEs) against non-highly compensated employees. The Actual Contribution Percentage (ACP) test does the same for matching and after-tax contributions.3Internal Revenue Service. 401(k) Plan Fix-It Guide – The Plan Failed the 401(k) ADP and ACP Nondiscrimination Tests An HCE is generally anyone who earned above the IRS compensation threshold in the prior year or owned more than 5% of the business.
When HCEs defer too much relative to the rest of the workforce, the plan fails, and the fix is a refund to HCEs until the ratios balance. If you’re an HCE who received one of these refunds, you didn’t do anything wrong. The plan’s demographics caused the failure.
Total Contributions Exceeded the Annual Additions Cap
A separate ceiling limits all contributions to your account combined: your deferrals, employer match, profit-sharing, and after-tax contributions. For 2026, that limit is $72,000.4Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs Breaching it also triggers a corrective distribution.
What’s In the Check
The refund is not just the excess itself. The plan also returns any investment gains the excess money earned while it sat in your account, calculated from the deposit date through the end of the relevant period.5Internal Revenue Service. Consequences to a Participant Who Makes Excess Deferrals to a 401(k) Plan For a timely correction of excess deferrals, earnings are figured through the end of the calendar year of the excess. For refunds tied to failed ADP or ACP tests, earnings run through the end of the plan year being tested. The IRS allows several methods for the earnings calculation, including the actual return on your specific investments or, in some cases, the rate of the plan’s best-performing fund.
If the excess lost value while invested, the distribution is reduced. You may receive less than you originally over-contributed.
How a Corrective Distribution Is Taxed
This is where things get complicated. Tax treatment depends on the type of excess and whether the correction is timely.
Timely Refund of Excess Deferrals (By April 15)
If you went over the deferral limit and the plan returns the excess by April 15 of the following year, the principal is taxable income in the year you originally made the deferral. Any earnings on the excess are taxed in the year you actually receive the money.6Internal Revenue Service. 401(k) Plan Fix-It Guide – Elective Deferrals Weren’t Limited to the Amounts Under IRC Section 402(g) for the Calendar Year and Excesses Weren’t Distributed Over-defer in 2026 and receive the refund in March 2027, and the excess principal goes on your 2026 return while the earnings go on 2027.
The April 15 deadline is fixed. It does not move if you file a tax extension.5Internal Revenue Service. Consequences to a Participant Who Makes Excess Deferrals to a 401(k) Plan An extension buys more time to file, not more time for the plan to send you the money.
Late Refund of Excess Deferrals (After April 15)
Miss the April 15 window and the excess gets taxed twice. It’s included in your income for the year you deferred it, same as a timely correction. But because it stays in the plan past the deadline, you lose your cost basis in that money. When you eventually withdraw it in retirement, the plan treats it as though it was never taxed, and you pay income tax on it again.2Internal Revenue Service. Retirement Topics – What Happens When an Employee Has Elective Deferrals in Excess of the Limits There is no mechanism to recover the double-taxed amount. The IRS is explicit that this outcome is intentional.5Internal Revenue Service. Consequences to a Participant Who Makes Excess Deferrals to a 401(k) Plan
Refunds From Failed ADP or ACP Tests
Excess contributions returned because of a failed nondiscrimination test follow different timing. The refunded amount is taxable to the HCE in the year of distribution, not the year the contribution was made.3Internal Revenue Service. 401(k) Plan Fix-It Guide – The Plan Failed the 401(k) ADP and ACP Nondiscrimination Tests Excess aggregate contributions from a failed ACP test are treated the same way.
Roth 401(k) Refunds
If the refund involves Roth 401(k) contributions, the returned principal generally isn’t taxable, because you already paid income tax on those dollars before they went into the plan. Only the earnings portion is taxable in the year you receive it. Your Form 1099-R will pair the corrective distribution code with Code B to flag the Roth source.
No 10% Early Withdrawal Penalty
Whatever your age, corrective distributions from a 401(k) are exempt from the 10% early withdrawal penalty that normally applies before age 59½.7Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions You aren’t raiding your retirement account; the plan is returning money that shouldn’t have been there.
Reading the Codes on Your 1099-R
Your plan administrator reports the refund to you and the IRS on Form 1099-R. Box 7 holds the distribution code, and that code tells you which tax year the income belongs to.8Internal Revenue Service. Corrective Distribution of Excess Contributions
- Code 8: excess contributions or excess deferrals taxable in the current year of the 1099-R.
- Code P: excess contributions or excess deferrals taxable in the prior year. The 1099-R may arrive a year after the contribution, but the income belongs on the earlier return.
- Code B: paired with Code 8 or P when the distribution comes from a designated Roth account.
- Code E: a distribution made under the IRS Employee Plans Compliance Resolution System, used for certain plan-level corrections.
Code P is the one that catches people out. When you see it, the taxable amount belongs on the prior year’s return, not the year you cashed the check.
When You Need to Amend a Return
Two situations commonly force an amendment. First, if your 1099-R carries Code P for a prior year you’ve already filed, and you didn’t include the excess as income on that return, you need to file an amended return to add it. Second, if you over-deferred across two employers, your W-2 for the contribution year couldn’t reflect the excess, because payroll had no way of knowing about deferrals elsewhere, so the wages you originally reported may be too low.
If you already reported the excess deferral as income on the original return for the contribution year, no amendment is needed. The 1099-R that arrives later is a reporting formality. Compare the codes on the 1099-R to what you actually reported before deciding.
How to Keep This From Happening Again
If you contribute to more than one 401(k)-type plan in a single year, add up your deferrals yourself. Neither payroll system sees the other, and you’re the one responsible for flagging the overage.2Internal Revenue Service. Retirement Topics – What Happens When an Employee Has Elective Deferrals in Excess of the Limits If you spot it before year-end, ask the plan to stop your deferrals for the rest of the year. If you spot it after, notify a plan in time for the refund to be processed before April 15. That single deadline is the difference between paying tax on the money once and paying tax on it twice.