When a Child Abroad Becomes Trustee: The Control Test and the Twelve-Month Rule
A US trust remains domestic only while United States persons control every substantial decision, so that a child living abroad who serves as trustee, or succeeds as trustee, can make the trust foreign.
By Caroline Esche Ashford, PhD, JD · Law stated as of October 26, 2026
In brief.
- A trust is a United States person only if a US court can exercise primary supervision over its administration and United States persons control all of its substantial decisions (I.R.C. § 7701(a)(30)(E)); every other trust is foreign.
- A child who is neither a US citizen nor a US resident and who makes, or can veto, one substantial decision, as trustee, co-trustee, protector or holder of a power to replace the trustee, makes the trust foreign.
- Where a death, incapacity, resignation or move changes the trust’s residence unintentionally, the trust has twelve months to restore US control and is then treated as never having changed (Treas. Reg. § 301.7701-7(d)(2)).
- A domestic trust that becomes foreign is treated as selling its assets, with gain recognized and loss disallowed, unless a person is treated as owner (I.R.C. § 684); foreign-trust reporting and the throwback rules follow.
- The drafting answers: a US trustee or special trustee holding the substantial decisions, a US successor chain, adviser and protector roles without control, and the child as beneficiary.
- The child’s country applies its own rules to the trust; German law, for example, attaches consequences to a trust managed from Germany.
Part I. The two tests that fix a trust’s residence
A trust is domestic only if a court within the United States is able to exercise primary supervision over its administration, the court test, and one or more United States persons have the authority to control all of its substantial decisions, the control test (I.R.C. § 7701(a)(30)(E)). Any other trust is foreign (I.R.C. § 7701(a)(31)(B)). The tests apply day by day: a trust is a United States person only on the days on which it meets both (Treas. Reg. § 301.7701-7(a)).
A family trust administered in a state normally meets the court test through the regulation’s safe harbor: the instrument does not direct administration abroad, the trust is in fact administered exclusively in the United States, and it has no automatic migration provision (Treas. Reg. § 301.7701-7(c)(1)). The control test is where a child abroad changes the answer. Citizens and residents are United States persons (I.R.C. § 7701(a)(30)(A)), so a child with US citizenship counts as one wherever the child lives; the difficulty arises with a child who holds neither US citizenship nor US residence.
Part II. Substantial decisions and the roles that carry them
Substantial decisions are those that persons are authorized or required to make under the instrument and applicable law and that are not ministerial. The regulation’s list, which is not exhaustive, covers distributions and their timing and amount, the selection of beneficiaries, allocations between income and principal, termination, claims and litigation, the removal, addition or replacement of a trustee, the appointment of a successor trustee, and investment decisions (Treas. Reg. § 301.7701-7(d)(1)(ii)).
Control means the power, by vote or otherwise, to make all substantial decisions, with no other person able to veto any of them (Treas. Reg. § 301.7701-7(d)(1)(iii)). Every person with authority over such a decision counts, not only the trustees. Three trustees who must act unanimously, one of them a nonresident alien, fail the test; acting by majority, with the two US trustees forming the majority, they pass it (Treas. Reg. § 301.7701-7(d)(1)(v), Examples 1 and 2). A nonresident alien who may replace the trustee holds a substantial decision (Treas. Reg. § 301.7701-7(d)(4), Example 4). An investment adviser’s decisions count as controlled by the United States person who hired the adviser if that person can end the adviser’s authority at will (Treas. Reg. § 301.7701-7(d)(1)(ii)(J)).
Table 1. The child’s role and the trust’s classification
| Role given to the child | Effect on US or foreign status | Safer alternative |
|---|---|---|
| Sole trustee | Foreign: the child controls every substantial decision | US individual or corporate trustee; the child as beneficiary |
| Co-trustee, unanimous decisions | Foreign: no decision can be made without the child | Majority vote with a US majority |
| Co-trustee, majority vote, US majority | Domestic while US persons hold the majority | Successor clause that preserves the US majority |
| Holder of the power to remove or replace the trustee | Foreign: the power is itself a substantial decision | Power held by a US person |
| Successor trustee on the parent’s death or incapacity | Foreign from the date of succession unless cured within twelve months | US successor chain ending with a US corporate trustee |
| Investment adviser | Domestic if a US trustee can end the appointment at will | Appointment terminable at will by the US trustee |
| Protector with a veto over distributions | Foreign: a veto over a substantial decision | Protector confined to powers that are not substantial decisions |
Treas. Reg. § 301.7701-7(d)(1) to (d)(4). A child with US citizenship or US residence is a United States person, and none of these roles changes the classification.
Part III. Death, incapacity and the twelve-month period
An inadvertent change is the death, incapacity, resignation, change in residency or other change concerning a person with power over a substantial decision that would change the trust’s residency but was not intended to. The trust then has twelve months to change the persons who control the substantial decisions or their residence. If it does, it is treated as having kept its residency throughout; if not, its residency changes as of the date of the change. A trust prevented by circumstances beyond its control may submit a written statement, and an extension may be granted for reasonable cause (Treas. Reg. § 301.7701-7(d)(2)).
The regulation’s own example is the family case. Three trustees act by majority, and a named successor takes office automatically when one of the US trustees dies; the successor is a nonresident alien, and the surviving US trustee replaces the successor with a US person two months later. The trust remains domestic; had the successor remained in office for twelve months, it would have become foreign as of the date of death (Treas. Reg. § 301.7701-7(d)(2), Examples 1 and 2). The period is written for changes not intended to alter the trust’s residency, and a planned appointment of a child abroad should not rely on it. Nor does it supply a replacement: where no one may appoint a US trustee, the change, by court petition if need be, must still be made within the twelve months.
Part IV. What follows when the trust becomes foreign
The outbound transfer rule
A trust that is not foreign and becomes foreign is treated as having transferred all of its assets to a foreign trust immediately before the change, in a sale at fair market value (I.R.C. § 684(a), (c); Treas. Reg. § 1.684-4(a), (b)). Gain is determined asset by asset, and no loss is recognized or set off (Treas. Reg. § 1.684-1(a)). The rule does not apply to the extent any person is treated as owner under the grantor trust rules (I.R.C. § 684(b)), as with a parent’s revocable trust while the parent lives, and a trust that cures an inadvertent change within the twelve months avoids it (Treas. Reg. § 1.684-4(c)). A living parent who is a US citizen or resident and funded the trust is treated as transferring the contributed property to the foreign trust on the date of the change, and as owner of that portion for each year in which the trust has a US beneficiary (I.R.C. § 679(a)(1), (a)(5)). At the parent’s death, property included in the gross estate generally takes a basis equal to its value at death (I.R.C. § 1014(a)(1), (b)(9)); a trust that becomes foreign years later is taxed on the appreciation since then.
The two foreign regimes and the reporting
While the parent is treated as owner, the trust is a foreign trust with a US owner: the parent is taxed on its income (I.R.C. § 671) and must ensure that it files Form 3520-A by the fifteenth day of the third month after its year end (I.R.C. § 6048(b); Instructions for Form 3520-A). After the parent’s death it is a foreign nongrantor trust, taxed as a nonresident alien individual (I.R.C. § 641(b)) on US-source and effectively connected income only (I.R.C. § 872(a)). Each US person who receives a distribution files Form 3520 (I.R.C. § 6048(c)) by the fifteenth day of the fourth month after the tax year, or the sixth month for individuals living and working abroad (Instructions for Form 3520). A failure costs the greater of USD 10,000 or 35 percent of the gross reportable amount (5 percent for Form 3520-A, borne by the US owner), plus USD 10,000 for each thirty days it continues beyond ninety days after notice (I.R.C. § 6677(a), (b)).
Income the trust accumulates and later pays to a US beneficiary is an accumulation distribution, which bears a partial tax under the throwback rules and a non-deductible interest charge at the underpayment rates, together capped at the distribution (I.R.C. §§ 665(b), 667, 668); except for tax-exempt interest, the distribution loses its character (Instructions for Form 4970). A domestic trust that at any time was foreign remains within the throwback rules (I.R.C. § 665(c)(2)(A)), so bringing the trust back does not end the exposure. These costs fall on the siblings and grandchildren who live in the United States.
Part V. Drafting answers
- A United States person clause. Every substantial decision is reserved to United States persons, and a power that would breach the clause lapses.
- A US trustee or special trustee. Where the family wants the child involved, a US trustee or US special trustee holds the substantial decisions; co-trustees act by majority with a US majority.
- A US successor chain. Named US successors, ending with a US corporate trustee, take office automatically, so that no vacancy falls to the child by default.
- A replacement power. A United States person may replace, without beneficiary consent, any fiduciary whose death, incapacity or move would change the trust’s residency.
- Adviser and protector roles. The child may advise on investments under an appointment the US trustee can end at will. A protector abroad holds no substantial decision; a power to appoint a successor trustee is one unless it cannot be exercised to change the trust’s residency (Treas. Reg. § 301.7701-7(d)(1)(ii)(I)).
- No automatic migration clauses. A clause moving the trust abroad if a US court attempts to supervise it, or shifting a decision when a creditor or agency asserts a claim, defeats the classification (Treas. Reg. § 301.7701-7(c)(4)(ii), (d)(3)).
- The child as beneficiary. A beneficiary without power over a substantial decision does not affect the classification; the trust withholds on US-source income subject to withholding that it distributes to a foreign beneficiary (Treas. Reg. § 1.1441-5(b)(2)).
Part VI. The child’s country
The US classification binds only the United States; the child’s country applies its own rules. Under German law, asset pools managed or seated in Germany are subject to unlimited corporation tax (§ 1(1) No. 5 KStG) and count as domestic persons for inheritance and gift tax (§ 2(1) No. 1 sentence 2(d) ErbStG); in the firm’s view a trust managed by a trustee in Germany can fall within both provisions, and a German-resident trustee is avoided. Independently of the trustee, the income of a foreign family foundation, a category extended to other asset pools, is attributed to a German-resident settlor or, failing one, to German-resident beneficiaries entitled to it (§ 15(1), (4) AStG), and the income tax treaty preserves taxation under part 5 of the Außensteuergesetz, which contains that rule (Article 1(6) of the income tax treaty with Germany, as amended in 2006).
- Map every power.
List each person who makes or can veto a substantial decision, with citizenship and residence.
- Read the succession clauses.
Identify who takes office on the death, incapacity or resignation of the parent and of each trustee.
- Install a US decision-maker.
Appoint a US individual or corporate trustee, or a US special trustee, with a named US successor.
- Give the child a role that does not count.
Beneficiary, investment adviser terminable at will, or minority co-trustee under majority vote.
- Calendar the twelve months.
On any death, incapacity, resignation or move, record the date and appoint a US replacement, with a written statement if more time is needed.
- Check the child’s country.
Review the trust under the law of the child’s residence before the child accepts office.
The firm is led by attorney Caroline Esche Ashford, PhD, JD. A graduate of Columbia University Law School, her practice focuses on international estate planning and the cross-border taxation and administration of estates and trusts, including the planning of trusts for families with members abroad. Dr. Ashford is also licensed to practice law in Germany. She advises in French and German as well as English.
Law and amounts as of October 2026.
This article is general information as of the date stated and is not legal or tax advice. The application of the rules and conventions described depends on the facts of each case.
