Family office estate planning is the coordinated legal, tax, and administrative work a centralized family team performs to move significant wealth to the next generation while keeping as much of it as possible out of the federal transfer tax system. For 2026, each person has a $15 million federal estate and gift tax exemption, and every dollar above that is taxed at 40 percent.1Internal Revenue Service. What’s New – Estate and Gift Tax The office’s job is to make full use of that exemption through trusts, gifting programs, business succession structures, and charitable vehicles, and to keep the paperwork clean enough to survive IRS review.
The 2026 Federal Exemption and Portability
Three federal taxes govern generational transfers. The estate tax applies at death, the gift tax applies to lifetime transfers, and the generation-skipping transfer tax targets gifts or bequests that skip a generation to prevent families from bypassing the estate tax by giving directly to grandchildren.2Office of the Law Revision Counsel. 26 USC Chapter 11 – Estate Tax
For 2026, each individual has a $15 million basic exclusion, meaning the first $15 million of combined lifetime gifts and transfers at death passes free of federal estate and gift tax.1Internal Revenue Service. What’s New – Estate and Gift Tax The One, Big, Beautiful Bill, signed into law on July 4, 2025, set that amount by amending the statute directly rather than relying on the prior inflation adjustment.3Office of the Law Revision Counsel. 26 USC 2010 – Unified Credit Against Estate Tax The GST exemption matches at $15 million. Everything above is taxed at a flat 40 percent.
Married couples can effectively double the exemption to $30 million through portability. When the first spouse dies, any unused portion of their $15 million exclusion can transfer to the surviving spouse, but only if the estate files Form 706 within nine months of death, even when no estate tax is owed.4Internal Revenue Service. Frequently Asked Questions on Estate Taxes A six-month extension is available on Form 4768. Skip the filing and the deceased spouse’s unused exclusion is lost permanently. A late portability election is available within five years of death under Rev. Proc. 2022-32 if the estate falls below the filing threshold, but relying on that backup is a gamble no family office should take.
Separately, each person can give up to $19,000 per recipient per year without touching the lifetime exclusion at all.1Internal Revenue Service. What’s New – Estate and Gift Tax A married couple with three children and six grandchildren can move $342,000 out of the taxable estate every year through the annual exclusion alone, with no filing obligation.
State Estate and Inheritance Taxes
Federal planning is only half the picture. Roughly a dozen states and the District of Columbia impose their own estate taxes, several states levy an inheritance tax, and one state imposes both. State exemption thresholds are dramatically lower than the federal amount, with some starting as low as $1 million. A family that owes nothing federally could still face a state bill of 10 to 16 percent on assets above the state threshold. Family offices with property or beneficiaries in multiple states need a jurisdiction-by-jurisdiction analysis of trust situs, real property location, and the decedent’s domicile.
Trusts That Move Assets Out of the Estate
Trusts are the primary mechanism for transferring wealth on the family’s terms. The two broadest categories, revocable and irrevocable, serve fundamentally different purposes.
Revocable Living Trusts
A revocable living trust lets the grantor keep full control during life. They can amend it, change beneficiaries, or dissolve it. At death, the trust becomes irrevocable and distributes assets according to its terms without probate. For a family holding real property in several states, avoiding multiple probates is a significant administrative benefit. The trade-off is that the assets remain in the grantor’s taxable estate, so there is no transfer tax savings.
Irrevocable Trusts
Irrevocable trusts remove assets from the grantor’s taxable estate. That is where the real tax savings happen. Once property goes in, the grantor gives up ownership and control, and a trustee manages the assets according to distribution instructions that might release funds at set ages, provide discretionary income for health and education, or accumulate wealth for decades. A trust protector can be named to oversee the trustee and adjust the trust if tax laws or family circumstances change, preserving the original intent even long after the grantor’s death.
Dynasty Trusts
A dynasty trust extends the irrevocable concept across multiple generations, potentially in perpetuity. The grantor allocates their GST exemption to the trust at funding, and the assets grow, compound, and pass from one generation to the next without triggering estate or GST tax at any level. Many states have modified or abolished the rule against perpetuities, so choosing the right state for trust situs is one of the most consequential decisions in multi-generational planning.
Domestic Asset Protection Trusts
About 20 states allow a person to create an irrevocable trust, name themselves as a beneficiary, and still shield the trust assets from future creditors. These domestic asset protection trusts require an independent trustee and typically impose a waiting period before protection attaches. They cannot be used to dodge existing debts; funding one after a claim arises invites a fraudulent transfer challenge. In states that do not permit them, similar protection is available through structures that exclude the grantor as a beneficiary.
Strategies for Estates Above the Exemption
The $15 million exemption is generous, but families with estates well above the threshold need additional strategies to reduce the 40 percent tax on the excess.
Grantor Retained Annuity Trusts
A GRAT transfers assets into an irrevocable trust that pays an annuity back to the grantor for a fixed term. If the assets appreciate faster than the IRS-assumed interest rate used to value the annuity, the excess growth passes to beneficiaries at the end of the term with little or no gift tax.5Internal Revenue Service. Forms and Publications: Estate and Gift Tax The technique works best with assets expected to appreciate significantly during the term.
The critical risk is mortality. If the grantor dies before the annuity term ends, the full value of the trust assets gets pulled back into the taxable estate under the retained-interest rules.6Office of the Law Revision Counsel. 26 USC 2036 – Transfers With Retained Life Estate That wipes out the entire tax benefit. Family offices typically structure GRATs with short terms, often two to three years, and roll them in sequence to reduce that exposure.
Family Limited Partnerships
A family limited partnership consolidates assets under a single entity. The senior generation keeps general partnership interests with management control, while transferring limited partnership interests to the next generation. Because limited partners cannot sell their interests on the open market and have no say in management, the transferred interests are worth less than a pro-rata share of the underlying assets. Appraisers apply discounts for lack of marketability and lack of control that can reduce reported value by a combined 25 to 40 percent, depending on the specific restrictions in the partnership agreement.
The IRS scrutinizes these discounts aggressively. Partnerships that exist on paper but function as personal piggy banks, where the senior generation keeps paying personal expenses out of partnership funds, risk being collapsed under the retained-interest rules. When a court finds the original owner never truly gave up control or benefit, the assets come back into the estate at full value and the family loses both the discounts and the planning opportunity. Every transfer of a partnership interest requires a qualified appraisal and a gift tax return on Form 709.5Internal Revenue Service. Forms and Publications: Estate and Gift Tax
Systematic Annual Gifting
The $19,000 annual exclusion is deceptively powerful when used systematically. A family office running a gifting program for both spouses across a large family can transfer hundreds of thousands of dollars per year without filing a single gift tax return. Gifts can go directly to individuals or into irrevocable trusts for their benefit. Layering the annual exclusion with tuition paid directly to educational institutions and medical payments made directly to providers, both unlimited and exempt from gift tax, accelerates the movement of wealth out of the taxable estate considerably.1Internal Revenue Service. What’s New – Estate and Gift Tax
Business Succession When Wealth Is in an Operating Company
When a family’s wealth is concentrated in an operating business, succession is simultaneously an estate planning problem and a business continuity problem. The family office coordinates both sides.
Buy-sell agreements are the foundation. These contracts dictate what happens to ownership interests when a family member dies, becomes disabled, retires, or wants out. A right-of-first-refusal clause keeps shares from leaving the family by giving other family members the first opportunity to purchase any interest that comes up for sale. The agreement also fixes the valuation method for those transactions, which should align with the methodology used for estate and gift tax purposes so the family does not end up defending conflicting numbers to the IRS.
Dual-class share structures let the senior generation distribute economic value broadly while concentrating voting power in the hands of family members who actually run the business. Non-voting shares carry the same dividend and appreciation rights but no management authority. The family office can transfer non-voting shares to the next generation through gifts or trusts, moving wealth out of the taxable estate while the founders keep operational control. Formal corporate resolutions document each change in leadership and share allocation.
Identifying next-generation leaders early is the part of succession planning most families resist. The family office can establish formal roles within the business hierarchy, tie compensation to performance metrics, and set a transition timeline. That formalization reduces the risk of claims about wasted corporate assets or breached fiduciary duties and shields the business from the chaos of an unplanned leadership change.
Philanthropic Vehicles
Charitable giving is both a values statement and a tax planning tool. Family offices typically choose between two structures, each with distinct tax advantages and administrative burdens.
A private foundation gives the family maximum control over grantmaking but comes with real obligations. The foundation must distribute at least 5 percent of its non-exempt assets annually in qualifying distributions.7Internal Revenue Service. Minimum Investment Return It pays an excise tax of 1.39 percent on net investment income. Cash contributions to a private foundation are deductible up to 30 percent of the donor’s adjusted gross income, and contributions of appreciated property are deductible up to 20 percent of AGI.8Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts Those limits are lower than what is available for gifts to public charities.
Donor-advised funds carry higher deduction limits: 60 percent of AGI for cash and 30 percent for appreciated assets contributed to a sponsoring public charity. There is no minimum annual distribution, and the administrative burden is far lighter because the sponsor handles compliance. The trade-off is less control over how and when the money is granted. Families who want a named foundation with a board of relatives making grant decisions accept the higher costs. Families focused on tax efficiency and simplicity often use donor-advised funds instead.
Charitable remainder trusts and charitable lead trusts layer charity into the broader estate plan. A CRT pays income to the family for a term of years and passes the remainder to charity. A CLT reverses that structure, paying charity first. Calibrated against current interest rates, either can dramatically reduce the taxable value of a transfer.
The Family Office’s Own Structure
The office itself has to be built before it can execute any of this. Most family offices organize as limited liability companies or limited partnerships because pass-through structures avoid the double taxation of a traditional corporation and separate the family’s personal assets from liabilities arising from office operations. The choice also affects how the office handles employment taxes and deducts operating expenses against investment income.
Governance flows through a family council with representatives from different branches. A written charter or family constitution spells out voting rights, dispute resolution procedures, and how new leadership gets appointed. Counsel reviews these documents against corporate formalities and fiduciary standards. Families that skip this step regret it when a transition happens faster than expected.
The SEC Family Office Exclusion
A single family office providing investment advice only to family members can avoid registering with the SEC as an investment adviser. The office must meet three conditions under the family office exclusion: it provides advice only to “family clients,” it is wholly owned by family clients and exclusively controlled by family members or family entities, and it does not hold itself out to the public as an investment adviser.9U.S. Securities & Exchange Commission. Family Office: A Small Entity Compliance Guide
“Family clients” is broader than most people assume. It includes lineal descendants of a common ancestor no more than ten generations removed, their spouses, key employees who participate in investment activities, and entities created for tax or estate planning purposes that are wholly owned by those individuals.9U.S. Securities & Exchange Commission. Family Office: A Small Entity Compliance Guide Charitable organizations funded exclusively by family clients also qualify.
Multi-family offices that advise unrelated families generally cannot satisfy the exclusion and must register as a registered investment adviser under the Investment Advisers Act of 1940. Even a single family office can lose the exclusion by bringing in an outside family’s assets or publicly marketing its services, so documentation of who the office actually serves has to be kept clean.
Valuation, Filings, and Penalties
Valuation disputes are where the IRS and wealthy estates fight most often, and the penalties for getting it wrong are steep. An understatement of estate or gift tax attributable to a substantial valuation misstatement triggers a 20 percent accuracy-related penalty on the underpaid tax. If the misstatement is gross, the penalty doubles to 40 percent.10Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
These penalties land most often on discounted valuations of family limited partnership interests and closely held business shares. The IRS treats these discounts as legitimate in principle but often abused in practice, and it has dedicated resources to challenging them. The best defense is a qualified, independent appraisal by someone with no financial interest in the outcome, documented thoroughly enough to survive a tax court challenge. Detailed workpapers explaining the legal and economic basis for every discount are what keeps a 20 or 40 percent penalty from landing on top of the tax itself.
The filing deadlines are non-negotiable. Form 706 for estate taxes is due within nine months of the decedent’s death, with a six-month extension available on Form 4768.4Internal Revenue Service. Frequently Asked Questions on Estate Taxes Form 709 for gift taxes is due by April 15 of the year following the gift.5Internal Revenue Service. Forms and Publications: Estate and Gift Tax Missing the estate return deadline does not just create penalties; it can forfeit the portability election and cost the surviving spouse up to $15 million in unused exemption.
Under every strategy discussed here sits the same requirement: a complete and current asset inventory. Deeds, subscription agreements, operating agreements, brokerage statements, life insurance policies, and every existing will, trust, and power of attorney need to be gathered, and each asset record has to reflect how the asset is titled. Titling errors are one of the fastest ways to undermine an otherwise sound plan. Original cost basis records matter just as much, because when property later transfers by sale, gift, or death, the tax consequences depend on what was paid for it and how long it has been held. Missing basis records force reconstructions that invite IRS scrutiny and generally produce worse outcomes than the actual history would have supported.