How does a nonqualified deferred compensation plan work?

"Nonqualified" means the plan does not meet the requirements for a qualified retirement plan such as a 401(k). It gets none of the protections those plans get: no trust held for employees, no ERISA funding rules, and no IRS contribution cap. In exchange the employer can offer it only to whomever it chooses, and the amounts can be large.

Legally, an NQDC plan is a contract. Your employer promises to pay you a certain amount in the future, and in return you give up the right to receive it now. Because you cannot touch the money and have no secured claim to it, the IRS lets you postpone the income tax until it is actually paid.

Section 409A of the Internal Revenue Code, added in 2004 after executives at failing companies pulled their deferred pay out early, sets the rules every such plan has to follow. It covers when you may elect to defer, when money may be paid, and what happens when a plan breaks those rules. Bonus deferral plans, supplemental executive retirement plans (SERPs) and 401(k) "restoration" or "excess" plans all fall under it.

One exception keeps ordinary bonuses out: pay that arrives within two and a half months after the end of the year it vests counts as a short-term deferral and is outside 409A entirely.

Plans covered by ERISA that pay retirement income must generally be funded and offered broadly. The way around that is the "top-hat" exemption, which applies to an unfunded plan maintained for a select group of management or highly compensated employees. The IRS describes the same limit for non-governmental 457(b) plans.

In practice eligibility is set by salary band or job grade, often somewhere above $200,000 of pay or at the director level and up. Board members can also defer their fees under similar arrangements.

A common design pairs the plan with the 401(k). The 401(k) can only count pay up to an annual IRS compensation cap, so an executive earning $600,000 loses part of their employer match on the pay above it. A restoration plan credits that missing match to an NQDC account instead.

The statute is precise about when you can choose to defer. Under 409A(a)(4)(B), the election must be made no later than the close of the taxable year before the year in which you perform the services. For a calendar-year employee, a deferral of 2027 salary has to be elected by December 31, 2026, which is why enrollment windows open in the autumn.

Two exceptions loosen that. Someone newly eligible may elect within 30 days of becoming eligible, but the regulations limit that election to pay for services performed after it is made. And performance-based compensation, such as a bonus tied to a performance period of at least 12 months, can be elected as late as six months before that period ends, provided the amount is not yet readily ascertainable.

Once the year starts, the election is irrevocable for that year. You cannot stop a salary deferral in June because you need the cash, short of a narrow cancellation after an unforeseeable emergency or a hardship withdrawal from your 401(k). Each year is a fresh election, and many plans track each year's deferral as its own "class year" account with its own payout choice.

You choose the payout timing and form at the same moment you elect the deferral. Section 409A(a)(2) allows payment only on six events:

• separation from service
• disability
• death
• a specified time or fixed schedule set at deferral
• a change in ownership or effective control of the company
• an unforeseeable emergency

Most plans offer two main choices. An in-service or fixed-date distribution pays on a date you name, for example January 2031, whether or not you still work there, which suits a known expense such as college tuition. A separation distribution pays when you leave, either as a lump sum or in annual installments, often up to 10 or 15 years.

Specified employees, broadly the top 50 officers and certain owners at a publicly traded company, face an extra rule: separation payments cannot start until six months after leaving, per 409A(a)(2)(B)(i).

Changing your mind later is possible but expensive in time. A redeferral election cannot take effect for 12 months, must be made at least 12 months before a fixed-date payment, and must push the payment back by at least five years. Someone scheduled to receive a 2031 payout who wants it later must elect by early 2030 and accept a date no earlier than 2036. Accelerating a payment is prohibited outside a short list of exceptions in the regulations.

To keep the tax deferral, the plan must be unfunded. Your account is a liability on the employer's books and the assets behind it remain the employer's property.

Many employers set money aside in a rabbi trust, which protects you if management changes its mind or the company is taken over by a hostile owner. It does not protect you from insolvency. The IRS states plainly that rabbi trust assets remain available to the employer's general creditors and that participants rank below them in bankruptcy. Section 409A(b) adds that moving the assets offshore, or locking them away only when the employer's finances weaken, makes them taxable to you immediately.

So deferring a large share of your pay is a concentrated credit bet on one company, made by someone whose salary, bonus and often equity already depend on that same company. Employees with deferred balances at Lehman Brothers learned in 2008 what an unsecured claim recovers. Checking the employer's credit rating and balance sheet belongs in the decision every year, and spreading payouts across shorter windows can reduce how much is ever at stake.

Income tax and payroll tax run on different clocks. IRS Publication 15-A says amounts deferred under a nonqualified plan are wages for Social Security, Medicare and FUTA when the services are performed or when the right to the money stops being subject to a substantial risk of forfeiture, whichever is later. A salary deferral that is vested immediately is hit with FICA that year.

Federal income tax, by contrast, is due only when the money is paid, at your ordinary rate in that year, and the employer withholds on it as wages. Publication 15-B covers taxable and excluded fringe benefits more broadly and supplements the payroll rules in Publications 15 and 15-A, where the deferred compensation detail lives.

The early FICA hit is usually good news. Under the non-duplication rule, an amount taxed at deferral is not taxed again when paid, and neither are the earnings credited on it at a reasonable rate. For an executive whose salary already exceeds the Social Security wage base, the deferral costs only the 1.45% Medicare tax plus the 0.9% Additional Medicare Tax.

The danger is a plan that breaks 409A. Under 409A(a)(1)(B), every vested amount deferred under it for that year and earlier becomes taxable immediately, plus an additional 20% tax and interest at the underpayment rate plus one percentage point. The penalty falls on the employee, not the employer, even when the employer drafted the defect.

State tax can work in your favour. A federal law, 4 U.S.C. 114, bars a state from taxing a former resident on retirement income paid in substantially equal installments over at least 10 years, so an executive who moves from California to Texas and takes a 10-year installment payout generally owes California nothing on it.

Your NQDC account does not usually hold real fund shares in your name. The employer credits it with notional or "phantom" returns that track investments you pick from a menu, often similar to the 401(k) lineup: index funds, target-date funds, a stable value option, sometimes company stock.

The employer may or may not invest real money the same way to hedge its liability; often it buys corporate-owned life insurance in a rabbi trust. Either way your return is a promise, measured by the funds you chose, and you can usually rebalance those choices daily without affecting the deferral or payout rules.

Two habits are worth avoiding. Tracking company stock stacks market risk on top of the credit risk you already carry. And treating the balance as a bond allocation because it feels conservative ignores that it can be worth nothing in a bankruptcy.

Walnut does not see an NQDC account, because it is a bookkeeping entry at your employer rather than a brokerage account. For the accounts you do connect, it reads your positions, compares each holding's one-year return with the S&P 500 and gives a keep, trim or exit read, and any trade happens only with your approval at your own broker. Walnut is not an investment adviser, has no cost basis or tax-lot data, and is no substitute for a tax professional on a deferral decision.

The 401(k) is a qualified plan. Assets sit in a trust for you, are protected from the employer's creditors, follow you when you leave, and can roll into an IRA. In 2026 you can defer $24,500, with an $8,000 catch-up at 50 and $11,250 at ages 60 to 63, according to IRS release IR-2025-111.

An NQDC plan has no IRS limit, cannot roll anywhere, offers no loans, and its payout dates are fixed years in advance. It also has no 10% early withdrawal tax and no required minimum distributions, because the payout schedule you elected does the same job.

The usual order of operations is to fill the 401(k), including any match, first, and to use an NQDC plan only for income beyond that. Deferring into the riskier plan while leaving the protected one unfilled has the sequence backwards.

The 457(b) is a deferred compensation plan too, but written into a different section of the code, and it comes in two forms that behave very differently.

A governmental 457(b), offered by states, cities, school districts and public universities, holds assets in trust for participants. It shares the $24,500 limit for 2026, allows the age-50 catch-up and a special catch-up in the three years before normal retirement age, can offer a Roth option, and can be rolled to an IRA. Distributions after leaving the job escape the 10% additional tax at any age. Functionally it is much closer to a 401(k).

A non-governmental 457(b), offered by tax-exempt employers such as hospitals and private universities, must remain unfunded, restricted to a select group of management or highly compensated employees, and its assets stay subject to the employer's general creditors. It carries the same unsecured-creditor risk as a corporate NQDC plan, plus a dollar limit the corporate plan does not have, and the IRS notes it allows no age-50 catch-up and no loans. Amounts above that limit at a tax-exempt employer typically go into a 457(f) plan, which taxes the money once it vests rather than when paid.

Dana is a single filer earning a $400,000 salary in 2026 and expecting a $150,000 bonus. In the autumn of 2025 she elected to defer $100,000 of the bonus into her employer's NQDC plan, to be paid in five annual installments starting the year after she separates from service. She expects to retire at 60, in 2036.

Tax in 2026. Her taxable income lands well inside the 35% federal bracket, which for single filers runs from $256,225 to $640,600 in 2026. Deferring $100,000 postpones $35,000 of federal income tax. Because the amount is vested and her salary is already past the Social Security wage base, FICA at deferral is Medicare only: 1.45% plus 0.9%, or $2,350.

Growth. She tracks a stock index fund on the plan menu. If it returns 6% a year for ten years, the account reaches about $179,085. No FICA is due on that growth under the non-duplication rule.

Payout. Five installments of roughly $36,000 to $43,000 each, with the unpaid balance still earning returns. If her other retirement income keeps her in the 24% bracket, she pays income tax around that rate on each installment instead of 35%. On the original $100,000 alone, the bracket gap is worth roughly $11,000.

Comparison. Taking the bonus as cash would have left about $62,650 after 35% income tax and Medicare, to invest in a taxable account where dividends and gains are taxed along the way. The deferral wins on paper if her rate falls and her employer survives. If tax rates rise, if she ends up in the same bracket, or if the company fails before 2041, the math changes, and in the last case she could recover cents on the dollar.

Picking a payout date for the tax benefit and forgetting the liquidity. Money promised for 2036 cannot be reached in 2030 for a house or a job change, and redeferral only moves it later.

Deferring more than the employer's credit justifies. A small or highly leveraged company is a poor place to park several years of income.

Choosing a lump sum at separation by default. A large single payment can push you back into the top bracket in the very year you hoped to be in a lower one, and it gives up the 10-year state tax protection.

Assuming a job change lets you move the money. Leaving triggers the separation payout you elected years ago, on that schedule, with no rollover option.

Election, distribution and penalty rules are in 26 U.S.C. 409A and its regulations at 26 CFR 1.409A-2. FICA and withholding timing are in IRS Publication 15-A, which Publication 15-B supplements for fringe benefits. 457(b) rules are on the IRS pages for 457(b) plans and non-governmental 457(b) plans. 2026 limits come from IRS release IR-2025-111 and brackets from the IRS 2026 inflation adjustments. Walnut is informational and is not an investment adviser. This guide is educational, not personalized tax or investment advice, and a deferral election is worth reviewing with a tax professional.