Is Deferred Compensation Taxable? Federal, State, and 409A Rules

Yes, deferred compensation is taxable. Every dollar you defer is eventually subject to federal income tax at ordinary rates, and most states tax it too. What changes with the type of plan is the timing. Money in a non-qualified plan is generally taxed when it’s paid to you or when your right to it becomes unconditional, while contributions to a qualified plan like a 401(k) are taxed when you withdraw the funds. Payroll taxes run on a separate clock that can trigger years before you see any of the money.

Non-Qualified Plans: When Income Tax Is Due

A non-qualified deferred compensation plan lets you postpone part of your pay, usually until retirement or a set future date. The IRS decides when that pay becomes taxable using the constructive receipt doctrine. Income is taxable when it’s credited to your account or otherwise made available to you without meaningful restrictions, whether or not you’ve cashed it out.

The restriction that keeps deferred pay out of your current-year income is called a substantial risk of forfeiture. As long as your right to the money depends on a real future condition, typically staying employed for a set number of years or hitting performance targets, the amount is not yet taxable. Once that condition is satisfied and your right to the payment is guaranteed, or once the money is actually paid, the amount is ordinary income on that year’s return and taxed at your regular federal rate.

Payroll Taxes Follow a Different Clock

Social Security and Medicare taxes on non-qualified deferred compensation are due at the later of two dates: when you perform the services that earn the pay, or when your right to the pay is no longer subject to a substantial risk of forfeiture.¹ That’s often years before the money is actually paid.

The Social Security portion is 6.2% and applies only up to the annual wage base, which is $184,500 in 2026.² If your other wages already exceed the cap in the year the deferred amount is counted, no additional Social Security tax is owed on the deferred piece. The Medicare portion is 1.45% and has no cap, so it applies to the entire deferred amount.¹

An additional 0.9% Medicare surtax applies to wages above $200,000 for single filers, $250,000 for joint filers, and $125,000 for married filing separately.³ These thresholds are not indexed for inflation. Because the deferred amount is combined with your other wages for payroll tax purposes in the year it’s counted, a large deferral can push you over the surtax line.

Once payroll taxes are paid under this timing rule, a non-duplication provision prevents the same dollars from being taxed again. The original deferred amount and any earnings it generates are exempt from further Social Security and Medicare tax when the money is eventually paid to you.¹

Qualified Plans: 401(k), 403(b), and Similar Accounts

Qualified retirement plans work differently. Traditional pre-tax contributions to a 401(k), 403(b), or similar employer plan reduce your gross income in the year you make them, so you pay less income tax now. The money grows tax-deferred inside the account, and you owe nothing on dividends or investment gains while the funds stay invested.⁴

Withdrawals in retirement are taxed as ordinary income at whatever bracket applies that year. For 2026, the elective deferral limit for 401(k), 403(b), and governmental 457 plans is $24,500. Participants age 50 and older can add an $8,000 catch-up contribution, and those ages 60 through 63 qualify for an enhanced catch-up of $11,250.⁵

Payroll taxes on qualified plans are handled up front. Pre-tax contributions are still counted as wages for Social Security and Medicare in the year you earn them, even though income tax on them is deferred.⁴ Because FICA is already paid, your qualified plan distributions in retirement are not hit with Social Security or Medicare tax.

Required Minimum Distributions

You cannot postpone qualified plan withdrawals forever. Required minimum distributions start at age 73 if you were born between 1951 and 1959, and at age 75 if you were born in 1960 or later.⁶ Each year’s amount is calculated from your account balance and life expectancy, and the withdrawal is taxable income except for amounts attributable to after-tax or Roth contributions that have already been taxed.⁷

Early Withdrawal Penalty

Take money out of a qualified plan before age 59½ and you generally owe a 10% additional tax on top of ordinary income tax on the distribution.⁸ Common exceptions include separation from service in or after the year you turn 55 (employer plans only, not IRAs), a series of substantially equal periodic payments based on life expectancy, disability that prevents substantial gainful activity, unreimbursed medical expenses above the deductible threshold, and payments to a former spouse under a qualified domestic relations order.

The 10% penalty applies to 401(k), 403(b), and IRA distributions. Governmental 457(b) plans are not classified as qualified retirement plans under the statute that imposes this penalty, so native 457(b) distributions are not subject to the 10% tax even before age 59½.⁹ Amounts rolled into a 457(b) from a 401(k) or other plan type keep their original penalty exposure. All 457(b) distributions are still taxed as ordinary income regardless of age.

State Income Tax on Deferred Compensation

Most states with an income tax treat both qualified plan distributions and non-qualified payouts as taxable income. State rates run from 0% in states with no income tax to more than 13% in the highest-tax states. Some states offer partial exclusions for retirement income, such as exempting the first several thousand dollars of annual distributions or excluding government and military pensions entirely.

If you move states after retirement, federal law limits how far your former state can reach. Under 4 U.S.C. § 114, no state may impose income tax on the retirement income of a nonresident. The protection covers distributions from qualified trusts, 403(b) annuities, IRAs, governmental 457 plans, and non-qualified plan payments that meet certain periodic payment requirements.¹⁰ Only the state where you live when the distribution is made can tax it.

What Happens if a Non-Qualified Plan Violates Section 409A

Section 409A sets strict rules on when and how non-qualified deferred compensation can be paid. If the plan is designed or operated in a way that violates those rules, the tax consequences fall on you, not the employer. All deferred compensation under the plan for the current year and prior years becomes immediately taxable to the extent it’s vested and hasn’t already been included in your income.¹¹

On top of regular income tax, the IRS adds a flat 20% additional tax on the amount pulled into income, plus a premium interest penalty at the federal underpayment rate plus one percentage point, running from the year the compensation was first deferred (or later vested) through the year it’s included in income.¹¹ Together, those penalties can eat a large share of the deferred balance.

A Note on Creditor Risk

Whether you ever get to pay tax on a non-qualified deferral depends on your employer staying solvent. By design, these plans are unfunded: the employer promises to pay you later, but no assets are legally set aside exclusively for you. If your employer files bankruptcy, you are a general unsecured creditor. A rabbi trust can informally hold the money and shield it from a change in management, but the assets inside it must remain reachable by the company’s general creditors in insolvency. Placing plan assets in an offshore trust or otherwise walling them off from creditors triggers the same immediate taxation and penalties described above.¹¹

How the Taxable Amount Shows Up on Your W-2

Distributions from a non-qualified plan, including payments from a rabbi trust, appear in Box 1 as part of your total wages and again in Box 11, which is designated for non-qualified plan distributions.¹² Regular income tax withholding applies.

If your plan runs afoul of Section 409A, the resulting income inclusion is reported in Box 1 and flagged separately in Box 12 with Code Z. That code tells you and the IRS the amount is subject to the 20% additional tax and premium interest penalty, and you’ll need to calculate and report those on the return for the year the code appears.¹²

1
Office of the Law Revision Counsel. 26 USC 3121 – Definitions
2
Social Security Administration. Contribution and Benefit Base
3
Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates
4
Internal Revenue Service. 401(k) Plan Overview
5
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
6
Internal Revenue Service. Retirement Topics – Required Minimum Distributions (RMDs)
7
Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs
8
Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts
9
Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions
10
Office of the Law Revision Counsel. 4 USC 114 – Limitation on State Income Taxation of Certain Pension Income
11
Office of the Law Revision Counsel. 26 USC 409A – Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
12
Internal Revenue Service. 2026 General Instructions for Forms W-2 and W-3