W-2 Box 11 Nonqualified Plans: Boxes 1, 3, 5 and Code Y/Z

Box 11 on your W-2 shows distributions you received during the year from a nonqualified deferred compensation plan or a nongovernmental section 457(b) plan. That same amount is already inside your Box 1 wages, so for most people no separate entry is needed on the 1040. The figure is there for the Social Security Administration, not for the IRS.

What Box 11 Reports

Box 11 is narrower than it looks. It reports actual distributions paid to you during the year from a nonqualified plan or a nongovernmental 457(b) plan. Governmental 457(b) distributions do not belong here; those go on Form 1099-R instead.¹

The number in Box 11 is not additional income on top of Box 1. It is a subset of Box 1, flagged separately. You report the full Box 1 amount as wages on your return and do nothing extra with the Box 11 figure itself. It is informational.

A nonqualified deferred compensation plan is an arrangement to pay part of your compensation in a future year, outside the qualified plan rules that govern something like a 401(k). The timing and taxation of these arrangements are controlled by Section 409A of the Internal Revenue Code.² If you have a Box 11 amount, you are almost certainly a participant in one of these plans.

Why the Number Is There

Box 11 exists so the Social Security Administration can tell current-year earnings apart from money you earned in a prior year but are only now receiving.¹ That distinction matters for the Social Security earnings test, which can reduce benefits for people collecting Social Security before full retirement age when their current earnings exceed a threshold.

Consider a retiree who receives a $200,000 lump sum from a nonqualified plan. Without Box 11, the SSA would look at Box 1 and see $200,000 of apparent current-year earnings, potentially cutting benefits sharply. With Box 11 completed, the SSA knows that money was earned in earlier working years and shouldn’t count against the current earnings limit.

How Box 11 Fits with Boxes 1, 3, and 5

Distributions in Box 11 always appear in Box 1 as well. The relationship with Box 3 (Social Security wages) and Box 5 (Medicare wages) is different, and this is where confusion tends to start.

Nonqualified deferred compensation follows a special FICA timing rule under Section 3121(v)(2). FICA applies at the later of when you performed the services or when the compensation vested (stopped being subject to a substantial risk of forfeiture), not when you actually receive the money.³¹⁴

The practical result: by the time a distribution shows up in Box 11, the FICA on that money was generally collected years earlier when it vested. The distribution itself typically triggers no additional Social Security or Medicare tax.

When Box 11 Is Blank Even Though You Had a Distribution

Several situations cause Box 11 to stay empty even when nonqualified plan activity clearly occurred. The W-2 instructions spell them out:¹

You had amounts vest during the year but received no actual distribution. Vested amounts go into Boxes 3 and 5, not Box 11.
You had both a distribution and newly vesting deferrals reported in Boxes 3 or 5 during the same year. In that case the employer is instructed to leave Box 11 blank and file Form SSA-131, the Employer Report of Special Wage Payments, which gives the SSA the detail it needs. This is common when someone vests in a lump sum and starts drawing distributions in the same year they retire.⁵
The plan had a Section 409A failure. That income is reported in Box 12 Code Z and included in Box 1, but Box 11 stays at zero.
The distribution went to a beneficiary after the employee’s death. Those payments are reported on Form 1099-MISC rather than a W-2.
Special wage payments like accumulated sick pay or vacation pay do not go in Box 11 even though they may represent prior-year work.

If your Box 11 is empty and you know a distribution happened, check Box 12 for Code Z and ask your employer whether Form SSA-131 was filed. A blank Box 11 does not necessarily mean anything is wrong.

Box 12 Code Y and Code Z

Two codes in Box 12 relate directly to nonqualified plans.

Code Y reports current-year deferrals under a Section 409A plan, including earnings on current and prior-year deferrals. Reporting Code Y is optional for employers, so plenty of W-2s omit it even when deferrals occurred.¹

Code Z is the one that changes your tax return. It reports income that became taxable because the nonqualified plan failed to satisfy Section 409A’s requirements. The Code Z amount is included in Box 1, and it carries an additional tax penalty on top of your regular income tax.¹ A common mix-up: Code Z income does not go in Box 11. Box 11 is for distributions, not for penalty income from a plan failure.

What Happens When You See a Code Z Amount

A Section 409A failure means the plan didn’t meet 409A’s rules on deferral elections, distribution timing, or plan operation. When that happens, all compensation deferred under the plan for the current year and all preceding years becomes immediately taxable, except amounts still subject to a substantial risk of forfeiture or amounts already included in income in an earlier year.²

On top of ordinary income tax, the statute adds:

A flat 20% additional tax on all compensation forced into income by the 409A failure.
Premium interest at the federal underpayment rate plus one percentage point, calculated as though the compensation should have been included in income back when it was first deferred or first vested. For the quarter beginning April 2026, the federal underpayment rate is 6%, putting the 409A premium rate at 7%.²⁶

Employers do not withhold the 20% tax through normal payroll, so you have to calculate and report it. On the 2025 Schedule 2, Line 17h is the designated line for income from a nonqualified deferred compensation plan that fails to meet Section 409A. The 20% additional tax reports there and flows to your Form 1040; the interest component is calculated separately and reported on the same schedule. Form 5329, which some sources point to, is not the right form: it handles additional taxes on IRAs and other qualified tax-favored accounts, not 409A failures.

If you find a Code Z amount on your W-2, working with a tax professional is worth the cost. The interest calculation requires reconstructing hypothetical underpayments across multiple prior tax years, and mistakes get expensive fast.

The Short Version for a Normal Box 11

If Box 11 has a number and Box 12 shows no Code Z, you have received a distribution from a nonqualified or nongovernmental 457(b) plan, that distribution is already inside your Box 1 wages, and your only job on the tax return is to report Box 1 accurately. The Box 11 figure itself is for the SSA. FICA on that money was almost certainly handled years ago when the amount vested. Nothing further is required from you on the federal return.

1
Internal Revenue Service. General Instructions for Forms W-2 and W-3
2
Office of the Law Revision Counsel. 26 USC 409A – Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
3
eCFR. 26 CFR 31.3121(v)(2)-1 – Treatment of Amounts Deferred Under Certain Nonqualified Deferred Compensation Plans
4
Social Security Administration. Contribution and Benefit Base
5
Social Security Administration. SSA-131 (Employer Report of Special Wage Payments)
6
Internal Revenue Service. Internal Revenue Bulletin: 2026-08