IRMAA After a Business Sale: The Medicare Premium Surcharge Nobody Warns You About

Your M&A attorney will not mention it. Your investment banker won't either. If you're 63 or older when you sell — or already on Medicare — a $3M+ business sale will almost certainly lock you into the highest Medicare premium tier for the next two years, adding up to $13,872 per person in extra premiums. Here's how it works and what can be done before closing.

What IRMAA is and why a business sale triggers it

IRMAA — Income-Related Monthly Adjustment Amount — is a Medicare surcharge applied to Part B and Part D premiums for beneficiaries whose income exceeds certain thresholds.¹ It is not a tax; it is a premium add-on that SSA calculates based on your Modified Adjusted Gross Income (MAGI) from two years prior.

For 2026 Medicare premiums, SSA uses your 2024 tax return. For 2028 premiums, SSA will use your 2026 tax return. If you sell a business in 2026 and recognize $5M in capital gains, that $5M flows into your 2026 MAGI — and determines your 2028 Medicare premiums.

Capital gains, installment sale proceeds, and depreciation recapture all count toward MAGI for IRMAA purposes. There is no capital-gains rate carve-out — a dollar of long-term gain counted toward MAGI is the same as a dollar of ordinary income for IRMAA calculations. Even a modestly sized business sale typically pushes the seller into the highest IRMAA tier.

2026 IRMAA tiers: how the surcharge scales

The table below shows 2026 Medicare Part B and Part D surcharges by MAGI tier, based on 2024 tax returns.² The base Part B premium in 2026 is $202.90 per month.³

Tier brackets and surcharge amounts are from CMS 2026 announcement (November 2025). Part D surcharges are added on top of each plan's own premium. Full table at CMS.gov.

Why nearly every business sale hits the top tier

The top IRMAA tier triggers at $500,000 MAGI for a single filer and $750,000 for married filing jointly. Nearly every business sale in the $3M–$50M range blows past these thresholds in a single year:

• $3M asset sale with $2.5M net gain: MAGI ≈ $2.5M+ → top tier
• $10M stock sale, C-corp with $2M basis: MAGI ≈ $8M capital gain + other income → top tier
• $5M QSBS stock sale, $3M excluded: $2M non-excluded QSBS gain + depreciation recapture → still likely top tier

The only scenarios where a business sale avoids the top tier: the gain is almost entirely covered by QSBS exclusion, the deal uses a pre-sale CRT that removes gain from the owner's MAGI, or the proceeds are structured into an installment sale that genuinely keeps annual recognized gain below $500K.

Who specifically needs to worry

IRMAA planning is most time-sensitive for owners who are:

• Already on Medicare (age 65+). The elevated 2026 MAGI affects 2028 premiums. You have two years of top-tier surcharges starting 24 months post-sale.
• Age 63–64 at the time of sale. You'll enroll in Medicare in 2028 or 2029. A sale in 2026 at age 63 means the 2026 MAGI is exactly in the 2-year window that determines your initial Medicare premiums.
• Age 62 or younger. The 2-year lookback will have passed by the time you enroll in Medicare (age 65+). The business sale itself won't trigger IRMAA — unless your investment income and ongoing earnings independently keep MAGI elevated.

A married couple where one spouse is 65 and the other is 63 faces a compound problem: the 65-year-old gets hit immediately (elevated 2026 MAGI → elevated 2028 premiums), and the 63-year-old enrolls in Medicare in 2028, also subject to top-tier surcharges in their first year.

Five strategies that reduce IRMAA exposure

1. QSBS exclusion — the cleanest fix

Gain excluded under IRC § 1202 (QSBS) is not included in MAGI at all.⁴ A C-corp founder who excludes $15M in QSBS gain under post-OBBBA rules has $15M fewer dollars contributing to MAGI in the sale year. If the entire gain is excluded (or if gain above the exclusion cap is small), IRMAA may be avoided entirely. This is the only strategy that both eliminates the capital gains tax and reduces IRMAA simultaneously.

2. Pre-sale charitable remainder trust (CRT)

If you contribute appreciated business stock to a CRT before the binding commitment, the CRT — not you — sells the stock. The CRT is tax-exempt; the gain doesn't appear in your MAGI.⁵ In exchange, you receive an income stream from the trust over your lifetime. The CRT contribution must occur before the sale is effectively committed — the binding-commitment rule under Rev. Rul. 78-197 applies strictly. Pre-LOI is the safest window. The charitable remainder is irrevocable, so this requires genuine charitable intent.

3. Pre-sale DAF contribution of appreciated stock

Direct contribution of business stock to a donor-advised fund (DAF) before the sale closes removes that stock's appreciation from your MAGI entirely — the DAF sells the stock tax-exempt and you never recognize the gain.⁶ Unlike a post-sale cash contribution (which gives only an itemized deduction that doesn't reduce MAGI for IRMAA purposes), a pre-sale stock contribution actually eliminates the gain from your income. Timing constraint: same as CRT — before the binding commitment.

4. Qualified Opportunity Zone (QOZ) investment

Investing capital gains into a Qualified Opportunity Zone Fund within 180 days of the sale defers recognition of the gain.⁷ Under the OBBBA (enacted July 2025), the deferral is now a rolling 5-year hold rather than the prior fixed December 31, 2026 deadline. The deferred gain is excluded from your MAGI in the year of sale, which reduces the 2-year-later IRMAA impact. After a 10-year hold, the QOZ appreciation itself is excluded. The limitation: QOZ investment must be made within 180 days of sale, and you're accepting concentrated risk in a single fund for 5–10 years.

5. Installment sale for smaller transactions

An IRC § 453 installment sale spreads gain recognition across the years payments are received. If annual installment proceeds plus other income stay below the relevant IRMAA threshold ($500K single for the top tier), the installment structure directly reduces IRMAA exposure. For example: $1.5M gain spread over 6 years = $250K recognized per year — below the top tier, and potentially below all IRMAA tiers if other income is modest. The limitation: this only works at deal sizes where annual installments are manageable. A $10M gain spread over 10 years still leaves $1M/year recognized — firmly in the top tier.

The SSA-44 appeal: what actually works

SSA allows Medicare beneficiaries to appeal IRMAA using Form SSA-44 if they experienced a qualifying life-changing event that caused their income to drop after the 2-year-old tax return SSA is using.⁸

The eight qualifying events are: marriage, divorce or annulment, death of a spouse, work stoppage, work reduction, loss of income-producing property (only via disaster, fraud, or theft — not voluntary sale), loss of pension income, and employer settlement or plan closure.

A business sale by itself does not qualify. However, if the sale coincided with your retirement — you stopped working and your current-year income is substantially lower than the 2-year-old return — the work stoppage qualifier applies. You can file SSA-44 with a current-year income estimate showing reduced income and request that SSA use that estimate rather than the elevated sale-year return. Processing typically takes 30–90 days; the adjustment, if approved, runs prospectively.

The practical implication: if you're retiring as part of the transaction, document the retirement separately and initiate the SSA-44 appeal early. If you continue receiving investment income, consulting fees, or board compensation above $192,000 MFJ after the sale, the appeal is less effective because current income still exceeds lower IRMAA tiers even without the sale proceeds.

When to bring a specialist into this analysis

IRMAA planning intersects with deal structure (QSBS, CRT, QOZ all require pre-LOI positioning), post-sale income strategy (Roth conversion timing, investment income level), and estate planning (spousal income splitting decisions). The strategies that matter most require action 6–24 months before closing — not after.

An exit-planning specialist who understands both the transaction tax layer and the ongoing retirement-income layer can model IRMAA exposure across sale scenarios, identify the structures that reduce MAGI, and coordinate with your CPA and M&A attorney. Most tax advisors focus on the sale-year return; IRMAA planning requires looking two years forward.

Sources

1. Social Security Administration — Medicare Premiums. IRMAA definition, 2-year lookback mechanism, and how SSA determines surcharge amounts from IRS-provided MAGI data.
2. Kiplinger — Medicare Premiums 2026: IRMAA Brackets and Surcharges for Parts B and D. Complete 2026 IRMAA bracket table for Parts B and D, single and MFJ filing status.
3. CMS — 2026 Medicare Parts A & B Premiums and Deductibles. Official CMS announcement (November 2025): 2026 Part B standard premium $202.90/month, annual deductible $283. Confirms IRMAA top-tier Part B total of $689.90/month and +$487.00 surcharge. 2026 brackets are based on 2024 MAGI.
4. IRC § 1202 — Partial Exclusion for Gain from Certain Small Business Stock (LII / Cornell Law). QSBS exclusion eliminates gain from gross income; excluded gain therefore does not appear in MAGI for IRMAA purposes.
5. IRC § 664 — Charitable Remainder Trusts (LII / Cornell Law). CRT is tax-exempt on gain from contributed property; distributions to the non-charitable beneficiary retain character in a four-tier ordering rule (ordinary income, capital gains, other income, return of corpus).
6. IRC § 170 — Charitable Contributions (LII / Cornell Law). Contribution of appreciated property to a donor-advised fund qualifies as a charitable deduction; the donor does not recognize gain on the contributed property.
7. IRC § 1400Z-2 — Special Rules for Capital Gains Invested in Opportunity Zones (LII / Cornell Law). Gain invested in a QROF is excluded from gross income until the earlier of disposition or the applicable deferral period. Updated by OBBBA (2025) with rolling 5-year deferral and permanent program extension.
8. SSA Form SSA-44 — Medicare Income-Related Monthly Adjustment Amount — Life-Changing Event. Lists the eight qualifying events, documentation requirements, and instructions for filing an IRMAA appeal based on a significant income reduction.

IRMAA surcharge amounts verified against CMS November 2025 announcement and Kiplinger 2026 IRMAA table. Top-tier Part B surcharge of +$487.00/month and Part D surcharge of +$91.00/month are CMS-published figures. Intermediate tier values cross-referenced against Kiplinger (see source 2). SSA-44 qualifying events verified against the current Form SSA-44 (December 2025 edition). Values current as of May 2026; CMS adjusts IRMAA tiers annually in November.