Stock Options, RSUs, and Medicare IRMAA: How Equity Compensation Affects Your Premiums
For executives and tech employees, equity compensation — RSU vesting, stock option exercises, ISO dispositions — can create large income spikes in the years just before Medicare enrollment. Because IRMAA surcharges are based on income from two years prior, equity income at age 63 or 64 directly sets Medicare premiums at 65 and 66. A single RSU vest of $150,000 on top of a working salary can add $2,884–$4,619/year in Medicare surcharges — for two years. Here's how each compensation type flows into IRMAA MAGI and what you can do about it.
How each equity compensation type enters IRMAA MAGI
IRMAA MAGI equals your Adjusted Gross Income (AGI, Form 1040 Line 11) plus tax-exempt interest (Form 1040 Line 2a). Each equity comp type flows into AGI differently — and the differences create real planning opportunities.2
| Equity type | IRMAA MAGI impact at triggering event | Notes |
|---|---|---|
| RSU vest | Full FMV at vest — ordinary income | FMV of shares on vest date reported as W-2 compensation under IRC § 83(a). Flows directly into AGI. Subsequent sale of vested shares creates capital gain or loss (basis = FMV at vest).3 |
| NQSO exercise (Non-Qualified Stock Option) | Spread (FMV − exercise price) — ordinary income | Spread reported on W-2 as compensation in the exercise year. Fully in AGI. Holding shares after exercise creates capital gain or loss on subsequent sale (basis = FMV at exercise).3 |
| ISO exercise (Incentive Stock Option) — shares held | $0 regular income at exercise | ISO exercise creates no W-2 income and no immediate AGI impact. The spread is an AMT preference item — it increases Alternative Minimum Taxable Income (AMTI) but NOT IRMAA MAGI, which is based on regular AGI only.4 |
| ISO qualifying disposition (sold after holding period) | Entire gain — long-term capital gain | If shares are held 1+ year from exercise AND 2+ years from grant date, the full gain at sale is LTCG. LTCG counts toward IRMAA MAGI — but at preferential rates (max 23.8% combined vs. up to 40.8% for ordinary income). You control which tax year the income appears in.4 |
| ISO disqualifying disposition (sold before holding period) | Spread at exercise — ordinary income | If sold within 1 year of exercise OR within 2 years of grant, the spread at exercise is W-2 ordinary income — same IRMAA treatment as NQSOs. Any additional appreciation above the spread is capital gain. |
| QSBS (IRC § 1202) exclusion | Excluded portion — does NOT count | Under the OBBBA (July 2025), up to $15M of qualifying small business stock gain is excluded. Excluded gain never enters AGI and has no IRMAA impact. Gain above the exclusion is capital gain and counts toward MAGI.5 |
The timing trap: equity income at 63–64 hits premiums at 65–66
Medicare's two-year look-back creates a precise timing problem for executives and tech workers with equity schedules that extend into their early 60s.
Worked example — Sarah, age 64, retiring tech executive:
| Income source (2024, age 63) | IRMAA MAGI |
|---|---|
| Base salary (partial retirement year) | $95,000 |
| RSU vest — final tranche at retirement | $180,000 |
| NQSO exercise — exercised remaining options at separation | $75,000 |
| Total IRMAA MAGI (2024) | $350,000 |
| Result: Single filer at $350,000 MAGI falls in IRMAA Tier 4 ($205,001–$500,000). 2026 surcharges: +$6,354/year — $529.50/month extra. Two-year total: $12,708. Sarah retired in 2024, and in 2025 her income may be near zero — but that won't affect premiums until 2027. She pays Tier 4 surcharges for her first two full years of Medicare regardless. | |
Can she appeal? SSA-44 appeals are available for qualifying life-changing events including work stoppage and work reduction. If Sarah's elevated 2024 income was directly caused by retirement (options exercised because they would otherwise expire at separation, RSUs accelerated at departure), SSA may accept an appeal to use 2025 income instead. A voluntary multi-year option exercise unrelated to a specific income reduction event is less likely to qualify. This is fact-specific — see the IRMAA appeal guide for the SSA-44 process and qualifying event analysis.6
The ISO planning advantage
ISOs are more favorable than RSUs and NQSOs for IRMAA planning — though the advantage requires active management:
- At exercise, no MAGI impact. The ISO spread goes into AMT calculations, not regular AGI. You can exercise ISOs to build a position without triggering IRMAA in the exercise year. This is the opposite of RSUs, where the vest date is the taxable event regardless of whether you sell.
- You control when the income appears. With a qualifying disposition, the income event is the sale — not the exercise. Exercise at 62, hold through the qualifying period, sell in a year when your other income is low. You determine which IRMAA look-back year receives the gain.
- LTCG character on qualifying disposition. When you do sell (qualifying disposition), the full gain is long-term capital gain. It counts toward IRMAA MAGI — but LTCG tax rates (max 23.8% including NIIT) are far lower than ordinary income rates (max 40.8%).
- AMT trade-off at exercise. Large ISO spreads can trigger significant AMT liability in the exercise year, which may create a cash-flow problem even though there's no regular income. An AMT credit offsets regular tax in future years — but doesn't eliminate the exercise-year cash cost.
Bottom line: ISOs give you more timing flexibility than RSUs or NQSOs — but only if you plan ahead. Exercising ISOs in a low-income year and timing the qualifying disposition sale for another low-income year (without crossing IRMAA tiers) is the optimal sequence. Disqualifying dispositions eliminate the advantage entirely.
2026 IRMAA brackets (set on 2024 MAGI)
Surcharges are per person. Married couples each pay based on their combined household MAGI.1
| 2024 MAGI — single | 2024 MAGI — married filing jointly | Added Part B + D per person/year |
|---|---|---|
| $109,000 or less | $218,000 or less | $0 |
| $109,001–$137,000 | $218,001–$274,000 | +$1,148/yr |
| $137,001–$171,000 | $274,001–$342,000 | +$2,884/yr |
| $171,001–$205,000 | $342,001–$410,000 | +$4,619/yr |
| $205,001–$500,000 | $410,001–$750,000 | +$6,354/yr |
| Above $500,000 | Above $750,000 | +$6,936/yr |
Calculate your equity compensation IRMAA impact
Enter your base income for the year (salary, dividends, expected Social Security, pension) and the equity income event you're modeling. Both ordinary income (RSU vest, NQSO exercise) and capital gain (ISO qualifying disposition) count toward IRMAA MAGI equally.
Five strategies to reduce equity compensation IRMAA exposure
1. Front-load or back-load vesting around the look-back window
The look-back years that affect Medicare premiums at 65 and 66 are your ages 63 and 64 — specifically, your tax returns from those years. If you have negotiating leverage over your RSU grant or option exercise schedule — leaving an employer, accelerating vesting, or negotiating a departure package — try to concentrate vesting into years before 63 (when you're far from Medicare) or accept that you'll vest after 65 (when IRMAA exposure exists regardless). The worst-case scenario is a large RSU tranche vesting right at 63 or 64, spiking the exact year SSA will use for your first Medicare year. This is worth modeling explicitly before signing any equity amendment.
2. Spread NQSO exercises over multiple years
Unlike RSUs (where the vest date is the taxable event), you typically choose when to exercise NQSOs — within the option window, often 10 years from grant or 90 days from separation. Rather than exercising all remaining options in one calendar year, spread exercises over 2–3 years and stay within a single IRMAA tier per year. The gap between IRMAA tiers is $28,000 (single, $109K→$137K threshold) to $34,000 (single, $137K→$171K). Staying $25,000–$30,000 below the next bracket threshold in a high-income year can save $1,736/year per person for two years — $3,472 total — by keeping you in the lower tier. Model each potential exercise year against your full income picture before executing.
3. Use ISOs strategically: exercise early, sell deliberately
If you hold ISOs, exercise them in a low-income year rather than waiting until you're near Medicare enrollment age. Exercising at 58–60 (when your salary is your main income and you're far from the IRMAA look-back window) doesn't create regular income. Once you've held the shares 1+ year from exercise and 2+ years from grant, you can time the qualifying-disposition sale for whatever year has the most IRMAA room — perhaps after retirement, in a gap year before RMDs begin. This decouples the AMT cost (paid in the exercise year) from the IRMAA cost (paid in the sale year), giving you more levers to pull. Early ISO exercise also starts the qualifying-period clock sooner.
4. Coordinate equity exercise years with Roth conversion years
If a given year will already be a high-MAGI year because of an unavoidable RSU vest or large NQSO exercise, avoid also doing a large Roth conversion in that year. You're already paying IRMAA on that year's income — stacking a Roth conversion on top drives you into an even higher tier without changing the IRMAA tier you're already paying. Instead, use the low-income years — the gap between a large equity-income year and when RMDs begin at 73 — to convert Roth at lower effective rates and in IRMAA-safe brackets. The sequencing goal: batch your large-income events into as few look-back years as possible, and use the remaining years for Roth conversions.
5. Assess SSA-44 eligibility before your first premium notice arrives
If your elevated look-back year income was directly caused by a qualifying life-changing event — specifically work stoppage or reduction (retirement) — you may be able to file SSA-44 to ask SSA to use your current-year income instead. The key question is causation: were the option exercises or RSU vests a consequence of your retirement (e.g., options would otherwise expire at separation, accelerated vesting triggered by departure), or were they planned well in advance of your retirement date? The former is a stronger SSA-44 argument; the latter usually is not. File promptly — before your first IRMAA premium notice — and include documentation showing the link between the employment event and the income spike.6
Related guides
- What counts as IRMAA MAGI — full breakdown of every income source including muni bond interest and 0%-rate capital gains
- Capital gains and IRMAA — investment sales, the 0%-rate trap, and timing strategies
- Roth conversions and IRMAA — bracket cliffs, pre-65 conversion windows, and QCD coordination
- RMDs and Medicare premiums — how growing distributions stack with equity income in the same year
- How to appeal IRMAA (SSA-44) — qualifying life events, the application process, worked examples
- 7 strategies to reduce IRMAA surcharges — the full playbook
Model your equity compensation and Medicare timing with a specialist
Equity comp IRMAA planning sits at the intersection of stock option tax strategy, Medicare timing, and Roth conversion sequencing — three disciplines that most generalist advisors treat separately. A fee-only advisor specializing in Medicare-aware retirement income planning can model your specific option schedule, vesting calendar, and IRMAA look-back years together — identifying the combination of exercise timing, ISO holding decisions, Roth conversion windows, and SSA-44 eligibility that minimizes your total Medicare cost over the first five years of enrollment.
Sources
- CMS: 2026 Medicare Parts A & B Premiums and Deductibles (November 2025). IRMAA single thresholds: $109K / $137K / $171K / $205K / $500K. MFJ: $218K / $274K / $342K / $410K / $750K. Part B surcharges: $81.20 / $202.90 / $324.64 / $446.38 / $487.00/month. Part D surcharges: $14.50 / $37.40 / $60.30 / $83.10 / $91.00/month. 2026 premiums are based on 2024 MAGI (two-year look-back). Verified May 2026.
- IRS Publication 17: Your Federal Income Tax. IRMAA MAGI equals AGI (Form 1040, Line 11) plus tax-exempt interest (Line 2a). All income in AGI — wages, capital gains, dividends — flows into IRMAA MAGI in full. There is no adjustment in IRMAA MAGI for the AMT or for preferential capital gains rates.
- IRS Tax Topic 427: Stock Options. IRC § 83(a) governs property received for services. For RSUs, FMV at the vest date is W-2 ordinary income. For NQSOs, the spread at exercise (FMV minus exercise price) is W-2 ordinary income. Both appear in Box 1 of Form W-2 and are included in AGI. Subsequent sale of acquired shares produces capital gain or loss (basis equals the amount included in income).
- IRS Tax Topic 427: Stock Options. Under IRC § 422, ISOs receive special treatment: no regular income is recognized at exercise. The spread is an AMT preference item (increases AMTI) but does not enter regular AGI. IRMAA MAGI uses regular AGI, not AMTI — so the ISO exercise spread does not directly increase IRMAA MAGI. Qualifying disposition (held 1+ year from exercise AND 2+ years from grant): full gain is long-term capital gain at sale. Disqualifying disposition: spread at exercise is W-2 ordinary income, same as NQSO.
- One Big Beautiful Bill Act (OBBBA), signed July 2025. Permanently raised the IRC § 1202 QSBS exclusion limit to $15M (from $10M). Tiered exclusion percentages for qualifying stock issued after OBBBA enactment: 50% at 3-year hold, 75% at 4-year hold, 100% at 5-year hold. Excluded gain does not appear in AGI and has no IRMAA MAGI impact. Gain above the $15M exclusion limit is long-term capital gain and counts toward MAGI. Source: Tax Foundation OBBBA analysis, July 2025. Verified May 2026.
- SSA Form SSA-44 and Instructions. Seven qualifying life-changing events for IRMAA appeal include work stoppage and work reduction. Option exercises tied directly to a retirement or involuntary employment separation may qualify if the income reduction was caused by the event. Voluntary option exercises unrelated to a qualifying employment event generally do not qualify. SSA evaluates each case individually; documentation linking the equity income to the employment event strengthens the appeal.
IRMAA brackets and surcharges reflect 2026 rules per CMS November 2025 announcement. Two-year look-back means 2026 premiums are determined by 2024 MAGI. Tax treatment of equity compensation reflects IRC §§ 83, 422, and 1202 as in effect under current law including the OBBBA (July 2025). Consult a licensed tax and financial advisor for guidance specific to your situation. Values verified May 2026.
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