Does deferred compensation count toward IRMAA? Yes, and the payout election decides when

The answer: every dollar counts

Medicare's income-related monthly adjustment amount (IRMAA) is set from a single number: modified adjusted gross income. Social Security's definition is short: "your total adjusted gross income and tax-exempt interest income" (SSA, Medicare premiums). A distribution from a nonqualified deferred compensation plan is taxable compensation in the year you receive it, so it sits inside AGI, and therefore inside IRMAA MAGI, dollar for dollar.

There is no partial treatment to argue for. You never paid income tax on the deferred amounts going in, so there is no after-tax basis to recover coming out, and nothing in the Code excludes NQDC from income the way a qualified charitable distribution excludes an IRA gift. If the plan pays you $400,000, your IRMAA MAGI for that year rises by $400,000. For the full mechanics of the formula, and the short list of items that do and do not reach it, see the companion guide to MAGI for IRMAA.

Why NQDC lands in MAGI in full

"Deferred compensation" here means a top-hat or executive plan governed by IRC §409A: an unfunded promise by your employer to pay you salary or bonus you chose to defer, plus any credited earnings, at a later date. Because the money stays an asset of the employer until it is paid, you are not taxed on it until it is paid. That is the whole point of the arrangement, and it is also why the payout is fully taxable when it arrives.

How it is reported depends on your relationship with the payer. For a current or former employee, distributions are wages: they appear in box 1 of Form W-2 and again in box 11 ("Nonqualified plans") so the IRS can see what part of the year's wages came from the plan (IRS Instructions for Forms W-2 and W-3). For a nonemployee director, deferred fees are paid out on a Form 1099, generally Form 1099-NEC, with Form 1099-MISC used for certain 409A amounts (IRS Instructions for Forms 1099-MISC and 1099-NEC). Either way, the number reaches line 1 or Schedule 1 of your return, and from there it reaches AGI.

Two adjacent cases are worth separating. A governmental 457(b) plan is also called "deferred compensation," is reported on Form 1099-R, and counts in full for the same reason. The exception is a Roth 457(b): qualified Roth distributions are excluded from income and do not reach MAGI at all, the same logic covered in whether Roth withdrawals count as income.

Taxed when paid, not when deferred

One source of confusion is that NQDC is taxed in two different years for two different taxes. Income tax applies when the money is paid. Social Security and Medicare payroll tax generally applies earlier, when the compensation is earned or vests, under the "special timing rule" in Treas. Reg. §31.3121(v)(2)-1. The IRS's NQDC audit technique guide (Publication 5528) covers both regimes.

So a retiree may see a W-2 with large box 1 wages and little or no FICA withheld. That is expected. The payroll tax was settled years ago; the income tax, and the IRMAA consequence, belong to the payout year.

The two-year lookback and your first Medicare year

IRMAA does not use this year's income. Social Security generally uses the federal return from two years earlier, so income received in 2026 sets 2028 premiums. The full mechanics, including what happens when that return is not yet on file, are covered in the guide to how to avoid IRMAA.

For NQDC, the lookback creates a specific trap. Many plans pay on separation from service, which for most executives means retirement. Retire at 63 and start payouts immediately, and the first payout year is the lookback year for age 65: your very first year on Medicare. Someone who has never paid an IRMAA surcharge can start Medicare in the top tiers because of a payout election made a decade earlier.

A related timing detail applies to public companies. If you are a "specified employee" (broadly, one of the top-paid officers), §409A requires separation-related payments to wait six months after you leave (§409A(a)(2)(B)(i)). Retire in September and a payment that looks like it belongs to this year can land in next year's return instead, and so in a different premium year. Check the plan document before building a projection around a calendar year.

The payout election is the real lever

Under §409A, the time and form of payment must be fixed when you first elect to defer, which is generally before the start of the year in which you earn the compensation. The plan document typically offers a menu: a lump sum at separation, a lump sum at a fixed date, or annual installments over five, ten or fifteen years. Whatever you chose then is, by default, what happens.

Changing it later is possible but deliberately hard. A subsequent deferral election under Treas. Reg. §1.409A-2(b) must:

• be made at least 12 months before the originally scheduled payment date;
• not take effect until at least 12 months after it is made; and
• push the payment out at least five years beyond the original date (except for payments on death, disability or unforeseeable emergency).

Acceleration is the other direction, and it is largely prohibited: the regulations allow payments to be brought forward only in narrow listed cases (Treas. Reg. §1.409A-3(j)). You cannot pull a payout into a low-income year because it would suit your Medicare premiums.

One consequence is easy to miss. Converting a scheduled lump sum into installments is itself a change in the form of payment. Unless the plan treats each installment as a separate payment, the new schedule generally has to start five or more years after the original date. For a lump sum due at 65, that means installments starting no earlier than 70. That can still be worth doing, but it is a decision to make with the plan administrator and a tax adviser well over a year in advance. A violation of §409A makes the deferred amount immediately taxable, with a 20% additional tax on top.

Why this is not a Roth conversion problem

Much IRMAA planning advice assumes the big income events are voluntary. A Roth conversion is: you choose the amount in November, having estimated your MAGI, and stop a dollar under the threshold. NQDC works the other way round. The amount and year were usually fixed years ago, and the plan will pay on schedule whether or not it suits your premiums.

That reverses the order of planning. With NQDC, the payout schedule is the fixed input, and everything else, including conversions, capital-gains realisation, when you claim Social Security and IRA withdrawals, has to be arranged around it. An executive with $150,000 a year of NQDC installments from 65 to 74 has, in effect, already used most of the lower IRMAA tiers for those years, and a conversion strategy that ignores that will cost more than it looks.

Lump sum vs. installments: an illustration

Take a married couple, both on Medicare from 65, with $140,000 a year of other MAGI (pension, taxable Social Security, IRA withdrawals and dividends) and a $600,000 NQDC balance. The table applies the 2026 married-filing-jointly IRMAA brackets from the IRMAA guide to every year for simplicity and ignores investment growth inside the plan.

Illustrative, not a projection. Surcharges use 2026 Part B and Part D amounts from CMS, multiplied by 12 months and two enrollees. Future thresholds and surcharges will differ (the lower thresholds are inflation-indexed; the top $750,000 joint threshold is not), and installment amounts will vary with plan earnings. It ignores income tax, state tax and the credit risk of an unfunded plan. Not a recommendation for your circumstances.

Three conclusions hold up beyond these particular numbers. First, spreading smooths the hit but does not always shrink it. The five-year installment costs almost as much in total IRMAA as the lump sum, because five smaller surcharges add up to nearly one large one. IRMAA tiers are capped at the top, so a lump sum that lands in the highest tiers can sometimes be cheaper on IRMAA alone. Second, the real IRMAA win comes from staying under a threshold, which is what the ten-year schedule does: $60,000 a year keeps this couple at or below $218,000. Third, payouts before 63 are invisible to Medicare, which is why starting installments at retirement at 61 moves two of the five payments out of scope entirely.

IRMAA is also rarely the biggest number. Spreading $600,000 over several years usually saves far more in federal income tax, by keeping the money out of the 35% and 37% brackets, than it changes in Medicare premiums. The two should be modelled together; the IRMAA calculator shows where a given MAGI lands against each tier, and the retirement tax calculator prices the income-tax side across a full retirement.

What you can still do once the schedule is locked

If the payout years are fixed, the levers move to everything around them:

• Keep discretionary income out of payout years. Do Roth conversions, gain harvesting and large IRA withdrawals in the gaps: before 63, or in years after installments end.
• Pay for living expenses from sources outside MAGI. Taxable-account basis, Roth money and cash reserves do not add to MAGI. In a payout year, spend those first.
• Watch the threshold, not the bracket. If an installment leaves you just under a tier, a small capital gain can cost a full year's surcharge. If it puts you well into a tier, extra income up to the next threshold carries no additional IRMAA.
• Use QCDs once you are 70½. A qualified charitable distribution reduces MAGI directly, which can offset part of a late installment.
• Consider a subsequent deferral while there is still time. If a payment is more than a year away and the five-year push-out suits your plans, it remains the one lever that changes the payout itself.

Does an SSA-44 appeal help?

Sometimes, and not in the way people hope. Retirement counts as a "work stoppage" life-changing event under 20 CFR §418.1205, so someone whose salary stopped can ask Social Security to use a more recent year's income instead of the two-year-old return (POMS HI 01120.005). The appeal replaces the old year's income with an estimate for the new year, and that estimate must include any NQDC you expect to receive. If the payouts fall in the new year, the appeal may not help much. It helps most when the salary years are behind you and the payout years are modest. The form itself is covered in the guide to appealing IRMAA with Form SSA-44.

NQDC, NUA and other company-benefit payouts

NQDC is one of several employer benefits that turn into a large block of ordinary income at a time the plan document partly controls. The closest comparison on this site is net unrealized appreciation, where a lump-sum distribution of employer stock from a 401(k) is taxed as ordinary income on the plan's cost basis in the year it is distributed. The mechanism is different: NUA lets the appreciation escape ordinary treatment, and NQDC has no such escape. The planning lesson is the same, though. The distribution year can be the largest income year of your retirement, it feeds straight into a Medicare premium two years later, and the decisions that shape it are made before the money moves.

For an executive with both, sequencing matters: an NUA distribution and a lump-sum NQDC payout in the same year stack in a single MAGI figure. Separating them by even one calendar year can change which tier each one lands in.