If 100% of your capital is tied up in a single stock and you lack additional funds to dilute your holding below 25%, a § 721 Exchange Fund is the primary tax-deferred vehicle designed for your situation. Unlike §351 ETFs, individual transferors contributing to a § 721 partnership are not required to pre-diversify before entry.
IRC § 721 defers capital gains taxes; it does not eliminate them. The original cost basis carries over into your partnership units and ultimate redeemed stocks (IRC § 723). Permanent tax elimination requires holding redeemed shares until death (securing a full step-up in basis under IRC § 1014) or donating shares directly to a qualified 501(c)(3) charity.
Understanding IRC § 721 Partnership Diversification
Tax-Free Contribution
Under IRC § 721(a), you contribute appreciated stock into a limited partnership in exchange for partnership units without recognizing immediate capital gains tax.
20% Illiquid Real Estate Rule
To satisfy IRC § 721(b) investment company anti-abuse rules, the partnership holds at least 20% of its portfolio in qualifying illiquid assets (typically real estate or private equity).
7-Year Lock-Up & Redemption
After remaining in the partnership for at least 7 years (satisfying IRC § 704(c)(1)(B) and IRC § 737 mixing-bowl rules), you can redeem your units tax-free into a diversified basket of public stocks.
§ 721 Tax Deferral & Growth Estimator
Compare immediate taxable stock sale vs. contributing 100% of gross stock into a § 721 exchange fund over a 7-year lock-up horizon.
Position Parameters
Important Notice on § 351 ETF Conversion Swaps
Under Revenue Ruling 2026-20 and Notice 2026-62, the IRS ruled that pre-arranged §351 ETF conversion swaps using Authorized Participant redemptions are taxable § 1001 exchanges. Traditional statutory § 721 Partnership Exchange Funds remain the primary legitimate tax-deferred path for concentrated stock.
Read Rev. Rul. 2026-20 Analysis →Relocating to a Low-Tax State Before Stock Realization?
High-net-worth executives moving between states must navigate strict statutory day-count rules and RSU/equity state sourcing allocation formulas before realizing capital gains.
Key Disclosures & Fee Structures
Partnership Management Fees
Traditional §721 exchange funds typically charge annual management fees ranging from 0.80% to 1.50% of asset value, plus upfront or back-end redemption fees. Compare fee drag against tax-deferral compounding.
20% Real Estate Illiquidity Exposure
To satisfy IRC § 721(b) investment company rules, at least 20% of fund assets are allocated to illiquid real estate or private equity investments, which may perform differently than broad public equity markets.
7-Year Lock-Up Mechanics
Redeeming prior to the 7-year statutory period triggers taxable gain recognition under IRC § 704(c)(1)(B) and § 737. Investors must maintain long-term capital horizons.
Explore Related HNW Tax Strategies
Section 351 Conversion ETFs
Review Rev. Rul. 2026-20 & Notice 2026-62 recharacterizing pre-arranged 351 ETF conversion swaps as taxable § 1001 exchanges.
Direct Indexing Tax Alpha Estimator
Estimate annual tax-loss harvesting alpha net of management fees for ongoing equity vestings.
NUA Rollover Calculator
Calculate Net Unrealized Appreciation tax savings on lump-sum company stock distributions.
Need Guidance on Section 721 Exchange Fund Sponsors?
Traditional §721 exchange funds carry minimum position sizes ($5M+) and specific sponsor availability. Click to be connected with an independent, fee-only CFP® specializing in concentrated stock strategies and exchange fund access.
Accreting.com — High-Net-Worth Wealth Strategies & Tax Calculators
For educational and illustrative purposes only. Consult a qualified CPA or CFP® before executing financial or tax strategies.