How are tax-loss harvesting decisions coordinated across accounts and family entities?
We coordinate tax-loss harvesting through one household-level view of taxable accounts, retirement accounts, trusts, partnerships, and controlled entities. The team checks recent purchases, planned trades, cost basis, gains, and investment targets before selling. This helps identify wash-sale risks, maintain portfolio exposure, and document decisions for tax reporting.
Start with a complete ownership map
List every account and entity that could buy or sell the security. Include personal brokerage accounts, joint accounts, IRAs, trusts, family partnerships, private foundations, and entities controlled by a family member. Vanguard explains that wash-sale issues can extend across related accounts, while its reporting generally covers covered shares in the same account. That difference makes consolidated tracking important. Vanguard
Assign one person or team to maintain the map. Record the account owner, tax status, custodian, investment manager, trading authority, and connection to the family. Update it when a new account opens, a trust changes, or an entity adopts a new manager.
Review the 61-day purchase window
Before harvesting a loss, review purchases made during the 30 days before the sale and plan for the 30 days after it. The IRS describes a wash sale as a loss sale followed by an acquisition of the same or substantially identical security during that period. The loss may be disallowed for current tax purposes. IRS Topic 409
Check automatic dividend reinvestment, recurring purchases, model changes, employee stock plans, and trades in retirement accounts. Fidelity notes that a broker may not identify every wash sale when transactions occur in different accounts. Fidelity
So very few family offices, investors and investment management firms are firing on all cylinders here because you're always having to experiment with what works.
Coordinate the trade and its replacement
The investment team, tax preparer, and family office should agree on the purpose of the trade, the loss amount, the replacement security, and the holding period. A replacement should fit the portfolio's approved allocation and risk limits. Record the original security, replacement, trade date, account, lot selection, and review owner.
Vanguard's tax-loss harvesting materials warn that purchases by a spouse or by entities controlled by the client or spouse can affect wash-sale treatment. Vanguard tax-loss harvesting addendum
Reconcile after year end
Collect Forms 1099-B, trust and partnership statements, and internal trade records. Compare realized gains and losses across entities, confirm adjusted basis, and give the tax preparer a schedule showing deferred or disallowed losses. The IRS says most sales are reported on Form 8949 and summarized on Schedule D, with allowable losses potentially carried forward. IRS Topic 409
Keep written approvals and exception notes. This creates a clear record when different family entities have separate investment mandates or custodians.
Related guides
- Tax Coordination With a Multifamily Office: A Practical Guide for Real Estate Families
- Access to Alternatives Through an MFO: A Practical Guide for Families
- Cross-Border Families and Multifamily Offices: A Practical Guide