Grantor Trust
Last updated 17 July 2026
A grantor trust is a United States income tax classification under which the grantor is treated as owning some or all of a trust's assets for federal income tax purposes. The grantor reports the corresponding income, deductions, and credits personally rather than the trust being treated as a separate taxpayer for those items. A trust can be a grantor trust in whole or in part.
Revocable trusts are generally grantor trusts while the grantor retains the power to revoke. Certain irrevocable trusts are also intentionally drafted to trigger grantor trust status through retained powers or interests. Income tax classification is separate from legal ownership and from whether trust property is included in the grantor's estate.
Why it matters for family offices
When an irrevocable trust is outside the grantor's estate but remains a grantor trust for income tax, the grantor's payment of tax can allow trust assets to grow without that tax expense. Under current United States federal treatment, payment of tax the grantor is legally required to pay is generally not an additional gift. The result depends on the trust's terms, retained rights, reimbursement provisions, and current law.
Administration must follow the classification. The office and tax advisers identify which items belong on the grantor's return, whether the trust has separate filing obligations, and how transactions between the grantor and trust are treated. State or non-US treatment may differ from the federal result.
How it shows up in practice
Suppose an irrevocable trust owns an investment portfolio that earns interest and realises gains. The trustee receives account statements, but the trust is intentionally treated as wholly owned by the grantor for US federal income tax. The family office provides the income detail to the grantor's accountant and records tax payments by the grantor separately from trust distributions.
Before the trustee reimburses the grantor for tax, advisers review whether the deed permits reimbursement and what effect it may have. The office does not infer estate or asset-protection consequences from the grantor trust label alone. It keeps the tax classification linked to the specific powers and documents that support it.
Related terms
Grantor (Settlor)
The individual or entity that creates a trust and transfers assets into it, also known as the settlor, trustmaker, or trustor depending on jurisdiction. The grantor defines the trust's terms: who benefits, who serves as trustee, and how assets may be used. In many UHNW structures, the founding generation acts as grantor of the trusts that will carry wealth forward.
Revocable Trust
A trust the grantor can amend or dissolve at any time during their lifetime, commonly used to avoid probate and direct how assets pass at death. Because the grantor retains full control, revocable trusts offer no estate tax savings or asset protection. Their value lies in privacy, continuity, and smooth administration when the grantor dies or loses capacity.
Irrevocable Trust
A trust that cannot be unwound by the grantor once assets are transferred in, permanently removing those assets from the grantor's ownership. That permanence is what delivers the benefits: estate tax reduction, creditor protection, and multi-generational control. Most sophisticated wealth transfer structures, from dynasty trusts to GRATs and insurance trusts, are irrevocable.
Tax Planning
The legal structuring of a family's affairs, through entity choice, residency, timing, and jurisdiction, to minimise tax liabilities across income, capital gains, wealth, and inheritance taxes. For UHNW families with assets and members in multiple countries, tax planning is a continuous, coordinated exercise rather than an annual event. It sits at the intersection of investment strategy, wealth structuring, and estate planning.
Trust
A legal arrangement in which one party (the settlor) transfers assets to another (the trustee) to hold and manage for the benefit of designated beneficiaries. Trusts are foundational tools in UHNW wealth planning, used for succession, asset protection, tax efficiency, and privacy. Family offices frequently administer multiple trusts across several jurisdictions.
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