11.4 Section 303 Redemptions, Section 6166 Deferrals & QSBS Exclusions

11.4 Section 303 Redemptions, Section 6166 Deferrals & QSBS Exclusions

The Internal Revenue Code provides several specialized statutory relief provisions designed to preserve closely held business continuity, prevent forced asset liquidations at death, and stimulate capital investment in entrepreneurial operating companies. For Certified Private Wealth Advisors (CPWA®), mastering IRC §303 Stock Redemptions, IRC §6166 Estate Tax Installment Deferrals, and IRC §1202 Qualified Small Business Stock (QSBS) Exclusions is vital to structuring high-impact liquidity and tax minimization solutions for affluent business families.

1. IRC §303 Stock Redemptions for Estate Liquidity

When a closely held business owner dies, their estate often faces substantial federal and state estate tax liabilities without possessing liquid cash to satisfy the tax payments. Under general corporate tax principles (IRC §302), a corporation's repurchase of stock from a shareholder is treated as an ordinary dividend distribution to the extent of corporate Earnings and Profits (E&P), taxed at top ordinary or qualified dividend rates.

IRC §303 carves out a crucial statutory exception, treating qualifying corporate stock redemptions as a sale or exchange of a capital asset rather than a dividend distribution.

   ┌────────────────────────────────────────────────────────────────────────┐
   │                IRC §303 Stock Redemption Mechanics & Benefits          │
   ├────────────────────────────────────────────────────────────────────────┤
   │ 1. QUALIFYING STATUTORY EXPENSES                                       │
   │    Redemption is limited to the sum of:                                │
   │    • Federal and state estate, inheritance, and succession taxes       │
   │    • Funeral and allowable administrative expenses (IRC §2053)         │
   │                                                                        │
   │ 2. TAX BASIS STEP-UP ELIMINATES TAXATION                               │
   │    Under IRC §1014, stock receives a stepped-up basis to FMV at death. │
   │    Because Redemption Price = Stepped-Up Basis (FMV):                  │
   │    TAXABLE CAPITAL GAIN = $0! (100% Tax-Free Corporate Cash Extraction)│
   │                                                                        │
   │ 3. NO FULL DISPOSITION REQUIRED                                        │
   │    Unlike §302(b)(3), the estate is NOT required to terminate its      │
   │    entire equity interest; family retains majority corporate control.  │
   └────────────────────────────────────────────────────────────────────────┘

Statutory Qualification Requirements for Section 303

To qualify for Section 303 redemption treatment, four strict statutory hurdles must be satisfied:

1. The 35% Adjusted Gross Estate (AGE) Test (IRC §303(b)(2)(A)): The value of the closely held corporate stock included in the decedent's gross estate must exceed 35% of the Adjusted Gross Estate (AGE):

$\text{Adjusted Gross Estate (AGE)} = \text{Gross Estate} - \text{Allowable IRC 2053/2054 Deductions}$

$\text{Eligibility Test: } \frac{\text{Value of Corporate Stock in Gross Estate}}{\text{Adjusted Gross Estate (AGE)}} > 35\%$

1. The 20% Multi-Entity Aggregation Rule (IRC §303(b)(2)(B)): If the decedent owned stock in two or more corporations, none of which independently satisfies the 35% test, the stocks can be aggregated and treated as a single corporation if the decedent's gross estate includes 20% or more of the total value of outstanding stock of each corporation (including spousal joint interests).
2. Dollar Cap on Redemption: The capital gains exchange treatment applies only up to the aggregate amount of death taxes (federal and state), interest thereon, and allowable §2053 funeral and administrative expenses. Any redemption proceeds exceeding this statutory cap are evaluated under general §302 dividend rules.
3. Shareholder Burden Requirement (IRC §303(b)(3)): Section 303 applies only to redemptions from a shareholder whose interest in the estate is directly reduced by (or legally obligated to pay) the estate taxes and administration expenses. (e.g., stock passing to a surviving spouse under the marital deduction cannot be redeemed under §303 because marital property pays zero estate tax).

2. IRC §6166 14-Year Estate Tax Installment Deferral

Under general tax rules, federal estate tax is due in full nine months after the date of death. When a major portion of the gross estate consists of an active closely held operating enterprise, paying a multi-million-dollar tax bill within 9 months could force a distressed liquidation of the business.

IRC §6166 provides an elective statutory relief mechanism allowing the executor to pay the estate tax attributable to the business interest in installments over up to 14 years (14 years and 9 months from date of death).

   ┌────────────────────────────────────────────────────────────────────────┐
   │                IRC §6166 14-Year Installment Payment Timeline          │
   ├────────────────────────────────────────────────────────────────────────┤
   │                                                                        │
   │ Date of Death                                                          │
   │   │                                                                    │
   │   ├─► 9 Months: File Form 706 & Elect §6166 Deferral                   │
   │   │                                                                    │
   │   ├─► YEARS 1 TO 5 (Years 1–5): INTEREST-ONLY PAYMENTS                 │
   │   │   • Pay annual interest only on deferred estate tax                │
   │   │   • 2% statutory interest rate on 2% portion ($1.9M+ indexed)      │
   │   │   • 45% of regular underpayment rate on remaining deferred tax     │
   │   │                                                                    │
   │   └─► YEARS 6 TO 15 (Years 6–15): 10 ANNUAL PRINCIPAL + INTEREST       │
   │       • 10 equal annual installments of principal                      │
   │       • Plus accrued annual interest on unpaid balance                 │
   └────────────────────────────────────────────────────────────────────────┘

Statutory Qualification Criteria for Section 6166

1. The 35% Adjusted Gross Estate (AGE) Test: The value of an interest in a closely held business must exceed 35% of the Adjusted Gross Estate (AGE).
2. Active Trade or Business Requirement: The enterprise must be an active operating trade or business (manufacturing, wholesale, retail, construction, active services), NOT a passive investment holding company or passive commercial real estate portfolio (Revenue Rulings 2006-29, 2006-34).
3. Closely Held Entity Size Requirements: To qualify as an interest in a closely held business, the entity must satisfy one of the following:
   • Sole Proprietorship: 100% owned by decedent.
   • Partnership / LLC: Decedent owned 20% or more of total capital interest, OR entity had 45 or fewer partners.
   • Corporation: Decedent owned 20% or more of voting stock, OR corporation had 45 or fewer shareholders.
4. The 20% Multi-Entity Aggregation Rule: Interests in two or more businesses can be combined to satisfy the 35% test if the decedent owned 20% or more of the total value of each business included in the gross estate.

Computation of Deferred Estate Tax and the 2% Interest Portion

• Pro-Rata Tax Deferral Limitation: The maximum estate tax that can be deferred is limited to the portion of total estate tax attributable to the closely held business:

$\text{Maximum Deferrable Tax} = \text{Net Estate Tax} \times \left( \frac{\text{Closely Held Business Value}}{\text{Adjusted Gross Estate}} \right)$

• Special 2% Interest Rate Tier: The estate pays a reduced 2% interest rate on the estate tax attributable to the statutory "2% Portion" (the first $1,900,000+ of taxable business value above the Basic Exclusion Amount, indexed annually for inflation). Deferred tax exceeding this threshold bears interest at 45% of the standard IRS underpayment rate.
• Non-Deductibility of Interest: Under IRC §2053(c)(1)(D), interest paid under Section 6166 is not deductible as an administrative expense on Form 706 or Form 1041.

Acceleration Triggers (IRC §6166(g))

All deferred principal and accrued interest become immediately due and payable upon the occurrence of specific acceleration events:

• 50% Disposition Rule: If 50% or more of the value of the business interest is sold, exchanged, distributed, or liquidated (including cumulative redemptions not qualifying under §303).
• Failure to Make Timely Payment: Failure to pay any principal or interest installment within 6 months of the due date.
• Accumulated Undistributed Net Income: If the estate has undistributed net income after Year 4, it must be applied toward accelerating principal payments.

3. Comparison: Section 303 vs. Section 6166

4. IRC §1202 Qualified Small Business Stock (QSBS)

IRC §1202 provides one of the most extraordinary tax incentives in the Internal Revenue Code, allowing non-corporate taxpayers to exclude up to 100% of capital gains realized from the sale or exchange of Qualified Small Business Stock (QSBS).

The One Big Beautiful Bill Act (OBBBA, P.L. 119-21) rewrote §1202 for stock acquired after July 4, 2025. Because most CPWA clients hold founder or early-investor stock issued on both sides of that date, the single most important QSBS question on any client engagement is when was this specific block of stock acquired? Two blocks of stock in the same company can be governed by two different rule sets.

Planning consequence. The new 3-year and 4-year tiers mean a founder facing an acquisition at month 40 is no longer choosing between "wait 20 more months or pay full freight" — a partial 50% or 75% exclusion is now on the table, which changes rollover, earn-out, and deal-timing negotiations materially.

   ┌────────────────────────────────────────────────────────────────────────┐
   │                IRC §1202 QSBS Core Qualification Requirements          │
   ├────────────────────────────────────────────────────────────────────────┤
   │ 1. DOMESTIC C-CORPORATION ISSUER                                       │
   │    Must be a domestic C-Corp at issuance and throughout holding period.│
   │                                                                        │
   │ 2. ORIGINAL ISSUANCE REQUIREMENT                                       │
   │    Must be acquired at original issue for cash, property, or services  │
   │    (secondary market purchases NEVER qualify).                         │
   │                                                                        │
   │ 3. AGGREGATE GROSS ASSETS CAP AT ISSUANCE                              │
   │    Gross assets (cash + tax basis of property) must not exceed         │
   │    $75,000,000 (stock issued after 7/4/2025) or $50,000,000 (stock     │
   │    issued on or before that date), tested at all times before and      │
   │    immediately after the issuance.                                     │
   │                                                                        │
   │ 4. HOLDING PERIOD                                                      │
   │    Pre-7/5/2025 stock: more than 5 continuous years for any exclusion. │
   │    Post-7/4/2025 stock: >3 yrs = 50%, >4 yrs = 75%, >5 yrs = 100%.     │
   │                                                                        │
   │ 5. 80% ACTIVE BUSINESS IN QUALIFIED TRADE                              │
   │    At least 80% of assets used in active conduct of a qualified trade  │
   │    (strictly excludes professional services, banking, hospitality).    │
   └────────────────────────────────────────────────────────────────────────┘

The Capital Gains Exclusion Percentages and Statutory Caps

For QSBS acquired after September 27, 2010 and on or before July 4, 2025, the exclusion at a full five-year hold is 100% of the capital gain, with 0% Alternative Minimum Tax (AMT) preference and 0% Net Investment Income Tax (NIIT) under IRC §1411. Stock acquired after July 4, 2025 reaches that same 100%/0%/0% outcome at five years, but under OBBBA it can also deliver a partial exclusion earlier: 50% at more than three years and 75% at more than four years.

The dollar ceiling is the greater of an applicable statutory cap or ten times basis:

$\text{Max QSBS Exclusion per Taxpayer per Issuer} = \max(\text{Applicable Dollar Cap},; 10 \times \text{Aggregate Adjusted Basis})$

The applicable dollar cap is $10,000,000 for pre-7/5/2025 stock and $15,000,000 (indexed for inflation beginning in 2027) for post-7/4/2025 stock.

Example — pre-7/5/2025 stock: A founder contributed $2,000,000 of cash basis and sells for $30,000,000 after six years.

• $10M statutory cap versus the 10× basis cap ($10 × $2,000,000 = $20,000,000).
• The taxpayer takes the greater of the two and excludes $20,000,000 of gain entirely from federal tax. The residual $8,000,000 of gain is taxable.

Example — post-7/4/2025 stock: A different founder contributes $500,000 of basis and the company is acquired at month 44. The 10× basis cap is only $5,000,000, so the $15,000,000 statutory cap controls. Because the holding period exceeded four years but not five, the exclusion percentage is 75%, not 100% — the remaining 25% of gain is taxed at the §1202 28% maximum rate plus the 3.8% NIIT.

Exam Trap — the acquisition-date fork. A client who holds two blocks of stock in the same issuer, one bought in 2023 and one bought in an August 2025 follow-on round, is governed by two different rule sets simultaneously: the 2023 block has a $10,000,000 cap and an all-or-nothing five-year clock, while the 2025 block has a $15,000,000 cap and a graduated 3/4/5-year clock. Never apply one block's answer to the other.

Disqualified Service and Financial Businesses (IRC §1202(e)(3))

To prevent conversion of professional compensation into tax-free capital gains, the statute explicitly excludes businesses involving:

• Professional Services: Health, law, engineering, architecture, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage.
• Financial & Real Estate: Banking, insurance, leasing, financing, investing.
• Natural Resources & Farming: Farming, mining, oil, gas, mineral extraction.
• Hospitality: Hotels, motels, restaurants, and similar operating establishments.

5. Advanced QSBS Strategies: Stacking & IRC §1045 Rollovers

High-net-worth advisors leverage advanced estate planning techniques to multiply the statutory per-issuer exclusion ($10,000,000 for pre-7/5/2025 stock, $15,000,000 for stock acquired after July 4, 2025) and to roll over early-stage liquidity events.

   ┌────────────────────────────────────────────────────────────────────────┐
   │                  "QSBS Stacking" via Non-Grantor Trusts                │
   ├────────────────────────────────────────────────────────────────────────┤
   │                                                                        │
   │  Founder owns $50,000,000 of QSBS (Eligible for only $10M exclusion).  │
   │  Founder makes completed gifts of QSBS to 4 Non-Grantor Trusts:        │
   │                                                                        │
   │  ┌───────────────────────┐          ┌───────────────────────┐          │
   │  │   Founder Personally  │          │  Non-Grantor Trust 1  │          │
   │  │   $10M Exclusion Cap  │          │  $10M Exclusion Cap   │          │
   │  └───────────────────────┘          └───────────────────────┘          │
   │             │                                   │                      │
   │  ┌───────────────────────┐          ┌───────────────────────┐          │
   │  │  Non-Grantor Trust 2  │          │  Non-Grantor Trust 3  │          │
   │  │   $10M Exclusion Cap  │          │  $10M Exclusion Cap   │          │
   │  └───────────────────────┘          └───────────────────────┘          │
   │                                                                        │
   │  TOTAL QSBS CAPITAL GAINS EXCLUSION STACKED = $40,000,000 - $50,000,000│
   │  (Saves up to $11.9M in Federal Taxes via Independent Taxpayer Status) │
   └────────────────────────────────────────────────────────────────────────┘

1. QSBS Stacking via Non-Grantor Irrevocable Trusts

Under IRC §1202, the per-issuer dollar exclusion applies per taxpayer ($10,000,000 for pre-7/5/2025 stock; $15,000,000 for post-7/4/2025 stock). An irrevocable non-grantor trust is a separate, distinct taxpayer under IRC Subchapter J. By gifting non-voting QSBS shares to multiple non-grantor irrevocable trusts (e.g., separate trusts for children, grandchildren, or Incomplete Non-Grantor / ING trusts) prior to a sale:

• The founder transfers low-basis QSBS using lifetime unified gift exclusion.
• Under IRC §1202(h)(2)(A), stock received via gift retains its QSBS character and original holding period.
• Upon a liquidity event, the founder and each separate non-grantor trust claim their own independent $10,000,000 capital gain exclusion, stacking exclusions to shield $40M, $50M, or more in capital gains!

2. IRC §1045 Tax-Free Rollover into Replacement QSBS

If an entrepreneur sells QSBS after holding it for more than 6 months but less than the required 5 years, they can defer recognition of capital gain under IRC §1045:

• 60-Day Reinvestment Window: The taxpayer must purchase replacement QSBS in another domestic C-corporation within 60 days of the sale.
• Tacking of Holding Period: The holding period of the original QSBS tacks onto the holding period of the replacement QSBS. Once the combined holding period exceeds 5 years, the subsequent sale qualifies for the full 100% Section 1202 exclusion!

6. Exam Traps & Real-World Client Scenarios

Exam Trap 1: Failing the Section 303 Shareholder Burden Requirement A decedent's estate qualifies under the 35% AGE test for IRC §303. The decedent's will leaves all corporate stock to a surviving spouse under the 100% marital deduction, while the estate tax liability is paid out of the residuary trust for children. The corporation cannot redeem the stock from the surviving spouse under §303 because the spouse's interest was not burdened by the estate tax.

Exam Trap 2: Disqualified QSBS Professional Service Entities An entrepreneur creates an LLC taxed as an S-corporation operating a nationwide medical consulting practice and later converts to a C-corporation. Upon sale for $20M, the owner attempts to claim the Section 1202 exclusion. The exclusion is completely barred because: (1) healthcare and consulting are explicitly disqualified trades under §1202(e)(3), and (2) conversion creates initial basis hurdles.

Exam Trap 3: Section 6166 50% Disposition Acceleration An estate successfully defers estate taxes under Section 6166. In Year 4, the family sells a 55% majority interest to a strategic buyer to raise cash. The sale triggers immediate statutory acceleration under IRC §6166(g), making 100% of all unpaid deferred estate taxes and accrued interest due within 6 months.