Generally yes, provided the trust does not defeat the fixed shares. Trusts are widely used for minors, disabled beneficiaries and tax planning.
The Canadian position
Testamentary trusts are standard for minor beneficiaries. Alter ego and joint partner trusts move assets out of the estate during life.
The Islamic position
The classical analogue is waqf, though a waqf is perpetual and charitable in character. A trust that merely administers an heir's vested share is uncontroversial; one that redirects the share is a different question.
Scholars distinguish sharply between managing a share and reallocating it.
Where the four schools differ
This question turns on one issue in our madhhab register: Is a trust recognised in fiqh, and is waqf the closest thing? — whether the classical law knows an institution like a trust, whether waqf is the nearest analogue, and whether property put into a waqf leaves the estate
Researched positions from our madhhab register — issue trust-and-waqf, reviewed 2026-09-01.
What a valid waqf requires, and what has actually been ruled about trusts. Three conditions do the work, and only one of them is fully agreed. Irrevocability: the Mawsu’a states without qualification that once a waqf has become binding there is no going back on it — “it is not sold, nor pledged, nor given away, nor inherited” — and that a waqf which reserves a power to revoke is, for the Hanbalis and on the sounder Shafi’i view, void altogether. Perpetuity: required for validity by the Hanafis, the Shafi’is and the Hanbalis on the madhhab, “because a waqf is the removal of ownership without limit, so it cannot bear a time-limit, like manumission”; not required by the Malikis, or by the Hanbalis on one alternative, so that a waqf for a fixed term is valid. Leaving the founder’s ownership: the table above. There is also a boundary worth knowing: a waqf that only takes effect on the founder’s death is valid, but it is treated as a bequest of a waqf and is therefore capped at one third of the estate like any other bequest — ‘Umar’s own endowment of Thamgh was made in exactly that form. Equally, a waqf made in the final illness which exceeds the third and which the heirs do not ratify is void as to the excess, and that excess becomes the heirs’ property. Now the contemporary half, kept separate on purpose. A common-law trust is not a waqf: it can be revocable, it usually has no charitable purpose, and it splits legal from beneficial ownership in a way the classical categories do not use. On whether any recognised body has ruled on it, the honest answer from this research is: we found none. The nearest thing is a deliberate silence. AAOIFI issued a revised Shari’ah Standard on Waqf in March 2019, and its scope clause says the standard “will deal neither with detailed rulings of dynasty Waqf nor those related to irsad (state endowment) or financial trust, despite their semblance to Waqf in certain aspects” — and its appendix then defines the financial trust in settlor, trustee and beneficiary terms, so it plainly means the instrument. A standard-setter that identified the trust, acknowledged the resemblance, and declined to rule on it. The International Islamic Fiqh Academy has ruled on waqf repeatedly — Resolution 181 (7/19) holds the texts on waqf broad enough to cover temporary as well as perpetual endowments, and endowments of money, shares, sukuk and benefits — but its official 641-page compilation of all resolutions to 2021 contains no resolution on the Anglo-American trust; every use of the words “trust” and “trustee” there is about amana in mudaraba, zakat collection or sukuk. That gap is the finding. It is not an invitation to reason by analogy on a family’s behalf: a particular trust has to be looked at for what it actually does with ownership, which is the question the classical sources above are asking in every school.
Full positions, evidence and history: Is a trust recognised in fiqh, and is waqf the closest thing? — the issue page.
This is legal information only. For advice on your own circumstances, speak to a lawyer.
Citations & sources
Every factual claim on this page traces to a source below. Details change — check the original source before relying on any figure, fee or legal position. Anything under “further reading” is related material, not a source for what is stated here.
- Surah an-Nisa 4:11 — shares of children and parents — Quran.com
- Surah an-Nisa 4:12 — shares of spouses and uterine siblings — Quran.com
- Surah an-Nisa 4:176 — the kalalah verse — Quran.com
- Shari'ah Standards — AAOIFI
- T3 Trust Guide — Canada Revenue Agency
- Alter ego joint partner trust ontario estate planning — Treadstone Law
- Alter ego joint partner trust ontario probate — Treadstone Law
- What is alter ego trust ontario — Treadstone Law
- Alter ego trust tax on death ontario — Treadstone Law
- Wills & estates practice — Treadstone Law