MassMutual Deferred Compensation Plan: 409A Rules, Taxes, and Payouts

A MassMutual deferred compensation plan is a nonqualified arrangement that lets highly compensated employees postpone part of their salary, bonus, or commissions and delay the federal and state income tax on that money until it is actually paid out, usually years later in retirement. The tax deferral is real, but the balance is not held in a protected trust the way a 401(k) is, and the Internal Revenue Code Section 409A rules that govern every election and distribution are strict enough that a single mistake can trigger tax on the entire balance plus a 20% surcharge.¹

How It Differs From a 401(k)

A 401(k) is a qualified plan. It meets the anti-discrimination and funding rules under ERISA and the tax code, so it comes with contribution limits, nondiscrimination testing, and mandatory access for rank-and-file workers. A nonqualified deferred compensation (NQDC) plan skips all of that. It is a contractual promise from your employer to pay you later, and because it does not meet the requirements of Section 401(a), it is not bound by the same limits or rules.² There is no cap on how much you can defer, but the money is not held in a protected trust for you alone.

MassMutual generally administers two flavors. In an elective deferral plan, you choose to set aside a percentage of your salary, bonus, or commissions. In a Supplemental Executive Retirement Plan (SERP), the employer funds the account and typically pays a formula-based benefit at retirement. Some employers offer both.

The Creditor Risk Behind Rabbi Trusts

Many employers informally fund their NQDC obligations by setting aside money in a rabbi trust, which MassMutual may manage. Under the IRS model trust language in Revenue Procedure 92-64, those assets must remain available to satisfy the employer’s general creditors if the company becomes insolvent.³ If your employer cannot pay its debts or files for bankruptcy, the trustee stops making benefit payments and holds the assets for creditors. You become a general unsecured creditor with no priority.

A bankruptcy filing also triggers an automatic stay that suspends all NQDC payments. Any benefits you had already accrued become an unsecured claim, and whether you recover anything depends on how the bankruptcy plays out. This is the single biggest risk of deferring into an NQDC plan, and it is worth weighing seriously before electing large amounts, particularly if your employer’s financial picture is uncertain.

Making Your Deferral Election

Section 409A is unforgiving about when you elect to defer, and the election is irrevocable once the deadline passes. For salary and most other compensation earned over a calendar year, the election must be made before the year the compensation is earned. To defer part of your 2026 salary, you would have needed to submit the election by December 31, 2025.¹ You cannot decide mid-year to start deferring pay you have already begun earning.

Two exceptions soften the rule. If you are newly eligible, you have 30 days from the date eligibility begins to make an initial election, and it only applies to compensation earned after the election date. For performance-based compensation tied to a service period of at least 12 months, you can elect to defer up to six months before the end of the performance period, provided the amount is not yet substantially certain to be paid and is not yet calculable.¹

The election form you submit specifies both the amount you are deferring and how and when you want to be paid in the future. Both pieces are binding.

Vesting and Forfeiture

Money you defer from your own salary or bonus is typically vested immediately, because you already earned it. Employer-funded SERP contributions usually come with a vesting schedule; leave before you vest and the unvested portion is forfeited.

Some plans go further and tie forfeiture to your conduct after leaving. A noncompete clause might require you to give up deferred benefits if you go to work for a competitor within a specified period. The IRS generally disregards noncompete provisions when deciding whether compensation is still at risk for 409A purposes, but the plan document can still enforce them contractually, so you can lose money even where the IRS would not have treated it as at risk. Read the forfeiture triggers before assuming the balance is secure.

How the Money Is Taxed

The headline benefit is delaying federal and state income tax until you actually receive the money. Your original deferred amount and any investment earnings credited to your account are taxed as ordinary income in the year of distribution. If your rate is lower in retirement, you come out ahead.

Payroll taxes run on a different clock. Under the special timing rule in Section 3121(v)(2), FICA is owed at the later of when the services are performed or when the deferred amount is no longer subject to a substantial risk of forfeiture.⁴ For most elective deferrals, that means FICA is due immediately when you earn the compensation, even though the cash is years away. Your employer withholds Social Security tax (6.2% up to the $184,500 wage base for 2026) and Medicare tax (1.45% on all wages, plus the 0.9% additional Medicare tax if applicable) from your other pay.⁵

There is an upside. Under the nonduplication rule, once FICA has been assessed under the special timing rule, the same dollars are not subject to FICA again when distributed.⁴ Distributions will have income tax withheld but no additional Social Security or Medicare tax. For executives already above the Social Security wage base, the real FICA cost of deferring is often just the 1.45% Medicare tax, or 2.35% if the additional Medicare tax applies.

When You Can Get Paid

You cannot withdraw money from an NQDC plan whenever you want. Section 409A limits distributions to six specific events:¹

Separation from service, whether through retirement, resignation, or termination.
Disability that prevents substantial gainful activity.
Death, in which case your beneficiary is paid.
A fixed date or schedule you selected at the time of deferral.
A change in control of the employer.
An unforeseeable emergency that meets the 409A standard.

At the time you elect to defer, you also choose the payment form, typically a lump sum or installments over a set number of years. That choice is locked in. You cannot wait until you are near retirement and then switch from lump sum to installments.

Changing a Distribution Election

Section 409A does allow a subsequent election to change the timing or form of payment, but the rules make acceleration effectively impossible. A change must satisfy three conditions: the new election cannot take effect until at least 12 months after you make it; the new payment date must be pushed out at least five additional years from when the original payment would have been made; and any election tied to a fixed-date payment must be made at least 12 months before that first scheduled payment.¹ The five-year delay applies to elections involving separation from service, fixed dates, and change-in-control triggers. It does not apply to death, disability, or unforeseeable emergency distributions.

You can push a payment further out, with lead time. You cannot pull it forward.

The Six-Month Delay for Public Company Executives

If you work for a publicly traded company and are a specified employee, your separation-from-service distribution cannot begin until at least six months after you leave.¹ Payments that would have gone out during that window are accumulated and released in a lump sum when the waiting period ends, with regular payments continuing on schedule after that.

A specified employee is generally anyone who earned more than $235,000 in compensation during the prior year (the 2026 threshold) and is a key employee under the top-heavy plan rules.⁶ If you are a senior executive at a public company in an NQDC plan, you almost certainly qualify. Plan around the six-month gap when budgeting for early retirement or a job change. Death is the only event that overrides the delay.

Unforeseeable Emergency Withdrawals Are Narrow

This is not a general hardship withdrawal. The provision covers a severe financial hardship caused by illness or accident affecting you, your spouse, or a dependent, loss of property due to a casualty like a fire or natural disaster, or other extraordinary circumstances completely beyond your control.¹

Even when you qualify, the distribution is capped at the amount needed to cover the emergency plus the taxes you will owe on the withdrawal. The plan must also consider whether you could resolve the hardship through insurance, liquidating other assets, or other available resources. A savings account that could cover the expense will usually be enough to get an emergency withdrawal denied.

What Happens If the Plan Slips on 409A

Penalties for 409A violations fall on you as the participant, not the employer, and they are severe. If the plan fails to meet the structural or operational requirements of 409A, the entire deferred balance becomes immediately taxable in the year of the violation. On top of that, you owe a 20% additional tax on the amount that should have been included in income. The IRS also charges interest at the federal underpayment rate plus one percentage point, calculated as if the deferred compensation had been taxable in the year first deferred.¹

Together, these can consume close to half of a large deferred balance. That is why the election deadlines, distribution trigger selections, and modification rules are treated as absolute. A missed deadline is a taxable event with a surcharge, not a paperwork problem.

Distribution Form Also Affects State Tax

If you earn your deferred compensation in a high-tax state and retire to one with no income tax, federal law can protect your distributions from being taxed by the state where you earned the money. Under 4 U.S.C. Section 114, no state may impose an income tax on the retirement income of a nonresident.⁷

For NQDC plans there are conditions. Elective deferral plans qualify only if you elect distributions as substantially equal periodic payments over a period of at least 10 years or over your life expectancy.⁷ A lump sum or a short payout does not qualify, and the state where you earned the money can still tax it. Excess benefit plans, which provide retirement benefits above the limits imposed on qualified plans, only need to be paid after your employment ends to qualify.

If a move to a lower-tax state is likely, a 10-year installment election set at the time you first defer can save meaningful state tax. Changing the election later requires the five-year delay and 12-month lead time, so course correction is expensive.

How Distributions Show Up on Your Tax Forms

When a triggering event occurs, MassMutual processes the payment according to your irrevocable election, and the employer withholds federal and state income tax from each payment.

For employees and former employees, distributions are reported on Form W-2. The total appears in Box 1 as wages and again in Box 11, which is designated for nonqualified plan distributions. The IRS uses Box 11 to verify Social Security benefits are calculated correctly, since those dollars were already subjected to FICA in an earlier year.⁸ No additional Social Security or Medicare tax is withheld from the distribution, because those taxes were paid under the special timing rule when the compensation was first deferred.⁴

If you were not an employee when the deferral was made, such as a board director or independent contractor, the reporting uses a 1099 rather than a W-2. Any amounts that become taxable because of a 409A plan failure are reported separately on Form 1099-MISC in Box 15.⁹

1
Office of the Law Revision Counsel. 26 USC 409A – Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
2
eCFR. 42 CFR 413.99 – Qualified and Non-Qualified Deferred Compensation Plans
3
BenefitsLink. Revenue Procedure 92-64
4
Office of the Law Revision Counsel. 26 USC 3121 – Definitions
5
Social Security Administration. Contribution and Benefit Base
6
Internal Revenue Service. Notice 25-67 – 2026 Amounts Relating to Retirement Plans and IRAs
7
Office of the Law Revision Counsel. 4 USC 114 – Limitation on State Income Taxation of Certain Pension Income
8
Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026)
9
Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC