Selling Your Business and Medicare IRMAA: How the Sale Year Affects Your Premiums

The year you sell your business, your MAGI — the income figure that sets Medicare Part B and Part D surcharges — typically spikes. Every dollar of the sale, whether capital gain or ordinary income, counts toward IRMAA. A business owner who closes a $1.2M asset sale at age 63 with $80K of base retirement income will often land in IRMAA Tier 5, paying an extra $6,936/year per person in Medicare premiums for at least two years. The planning window to reduce that impact is usually 12–24 months before the sale closes.

How business sale income flows into IRMAA MAGI

IRMAA MAGI = AGI (Form 1040, Line 11) plus tax-exempt interest (Line 2a). Business sale proceeds enter AGI in two forms, both of which count toward IRMAA at 100%:²

• Ordinary income — §1245 recapture on depreciated equipment, §1250 recapture on real property, §751 "hot assets" in partnerships (unrealized receivables, substantially appreciated inventory). Reported on Form 4797. Taxed at ordinary income rates and fully in MAGI.
• Capital gain — allocated goodwill, covenant not to compete, customer lists (if treated as capital assets), and gain on appreciated stock or membership interests. Reported on Schedule D. Even if taxed at the preferential 0%/15%/20% rate, capital gains enter AGI in full and count toward IRMAA MAGI without any reduction.

Unlike a home sale (where IRC §121 excludes up to $500K from AGI) or QSBS stock (where §1202 can exclude the entire gain), most small business sales have no AGI exclusion. The full taxable gain — ordinary and capital combined — lands in MAGI and sets surcharges for the following two years.

The two-year look-back trap near age 65

IRMAA surcharges for a given year are set using your MAGI from two years prior. This creates a predictable window of maximum damage for business owners who sell between ages 63 and 65:¹

Selling at 63 or 64 while also stopping work means your final working-year income (still elevated) combines with the business sale proceeds in the same MAGI year. That double-income year is the exact year SSA looks back to for first-year Medicare premiums. The compounding is severe.

2026 IRMAA surcharge table

These thresholds use your 2024 MAGI to set 2026 Medicare premiums. A business sale in 2024 flows here.³

For married couples, both spouses pay the surcharge based on the joint MAGI. A $600K business sale that pushes household MAGI from $250K to $850K moves both spouses to Tier 5, adding $13,872/year in combined surcharges for two years — $27,744 total — on top of any capital gains tax owed.

Calculate your business sale IRMAA impact

Enter your base retirement income and the anticipated sale proceeds. The calculator separates capital gain from ordinary income (recapture), and shows your IRMAA tier before and after the sale.

The installment sale: the most effective IRMAA tool for business owners

Under IRC §453, a business owner can elect to receive sale proceeds over multiple years, reporting gain in proportion to payments received each year rather than in a single lump sum.⁴ This is the most direct structural tool for reducing business sale IRMAA — it spreads the MAGI event across multiple look-back years instead of concentrating it in one.

Installment sales are available for most asset and stock transactions. They are not available for publicly traded securities (which don't apply to closely held businesses) and have restrictions on sales to related parties. The election must be made at the time of the sale on Form 6252 — it cannot be undone after filing.

Worked example: lump sum vs. 5-year installment

The installment election also defers capital gains tax, which may compound the financial benefit beyond IRMAA savings. The trade-off: you accept counterparty risk (the buyer needs to keep paying over the installment period) and lose the use of proceeds up front. Interest must be charged on the deferred balance at IRS applicable federal rates (AFR); below-AFR seller financing is recharacterized as imputed interest income. A business attorney and CPA should structure the note terms.

One important limit: ordinary income components of the sale — §1245 recapture, §751 hot assets — cannot be deferred under installment sale rules. They are recognized in full in the year of the sale regardless of when the payment is actually received. So an asset sale with $200K of equipment recapture means $200K of ordinary income hits MAGI in year one, while only the capital gain portion can be spread.

The QSBS §1202 exclusion: C-corp owners' escape hatch

Qualified Small Business Stock (QSBS) under IRC §1202 allows shareholders in qualifying C-corporations to exclude gain from federal income entirely — meaning that excluded gain does not enter AGI and has zero IRMAA impact. This is the only common mechanism that can fully eliminate business sale income from IRMAA MAGI.⁵

The One Big Beautiful Bill Act (OBBBA, July 2025) expanded §1202 significantly. Two regimes now exist:

Critical limitations: §1202 applies to C-corporations only — S-corps, LLCs, and partnerships do not qualify. The corporation must meet active business requirements in a qualified trade or business (healthcare, law, and accounting are excluded fields). The taxpayer must have acquired the stock at original issuance and held it for the required period. And the gain exclusion applies to federal income only — some states (California notably) do not conform to §1202 and tax the gain at full state rates.

IRMAA consequence of a qualifying exclusion: If a single filer excludes $1.2M of QSBS gain from income, that $1.2M never enters AGI and therefore never enters IRMAA MAGI. A business owner who would have been in IRMAA Tier 5 ($6,936/year) with a fully taxable sale pays no IRMAA surcharge at all if the exclusion covers the entire gain. The Medicare planning value of holding C-corp stock to qualify is substantial for owners near Medicare age.

SSA-44 appeal: when it applies to a business sale

Form SSA-44 allows you to ask SSA to use your current year's income instead of the two-year look-back MAGI if you experienced a qualifying life-changing event.⁶ The seven qualifying events include work stoppage and work reduction — which means retirement from the business can qualify.

The key distinction for business owners:

• SSA-44 may apply if you sold the business because you retired. SSA looks at whether work stopped, not why you received income. If you stopped working in the sale year, you can file SSA-44 and show your lower projected MAGI for the current year (post-retirement). SSA will use that lower income to set your premiums rather than the sale year's spike.
• SSA-44 does not apply if the sale was a financial decision unrelated to retiring — for example, you sold a passive investment LLC while remaining employed, or you sold a business unit while continuing to operate the rest of the business.
• What SSA-44 does not fix: It reduces premiums for years 2 and 3 after the event, using your estimated current-year MAGI. If the installment sale is already spreading income across years, SSA-44 may have diminishing value (because the annual installment income may itself trigger IRMAA). Model the two strategies together, not independently.

The practical timing: file SSA-44 as soon as you retire and stop receiving business income. Bring evidence of the work stoppage (final paycheck, corporate dissolution, sale closing statement). SSA will recalculate premiums retroactively to Medicare enrollment if approved.

Five strategies to reduce business sale IRMAA exposure

1. Elect installment sale at closing

The primary tool. Spread the capital gain portion over 3–10 years via IRC §453 to keep MAGI below IRMAA thresholds in each installment year. Must be elected at closing on Form 6252. Ordinary income recapture still hits in year one. Requires a creditworthy buyer willing to accept seller financing — factor this into negotiation.

2. Time the sale to a low-income year

If you have flexibility on closing date, avoid the year you take your first large RMD, a Roth conversion, or finish a high-earning working year. A business sale in a quiet income year — the year you've already retired, have minimal RMDs, and deferred Social Security — stacks on a lower base. Every dollar of lower base income reduces which IRMAA tier the sale triggers.

3. Use Roth conversions before the sale, not after

The years between ages 60–63, before the sale MAGI spike and before Medicare enrollment, are typically the best window for Roth conversions. Converting IRA funds to Roth in low-income years reduces future RMDs — which would otherwise stack on top of business sale income in the same MAGI year. Converting $200K/year at ages 60–62 can eliminate $600K of future RMD income that would have appeared in the MAGI years affected by the business sale. See the Roth conversion IRMAA guide for bracket math.

4. File SSA-44 if the sale coincides with retirement

If you stop working in the year of the sale, file Form SSA-44 with projected current-year income. SSA will compare your post-retirement MAGI to the sale-year spike and may grant a lower IRMAA bracket for the current year. Works best when installment sales are not already controlling income (since lower annual installments may mean the SSA-44 appeal doesn't produce meaningful savings).

5. Consider a charitable vehicle for highly appreciated assets

If a portion of the business value is in assets that could be donated, Qualified Charitable Distributions from an IRA (up to $111,000/person/year if age 70½+) can reduce the MAGI base in the same look-back year, creating headroom for sale proceeds to land in a lower IRMAA tier.⁷ For those considering philanthropy as part of exit planning, charitable remainder trusts (CRTs) can also be funded with appreciated business interests before the sale, deferring gain recognition and converting the asset to an annuity stream — though CRT income also counts toward MAGI in each distribution year. This is a complex strategy that requires legal and tax coordination well before the sale closes.