Faraid · Grandchildren
Grandson (son's son)'s Share of Inheritance in Islam: Residuary, standing in for a son
A son's son inherits as a residuary heir in place of a son when the deceased left no living son. He is blocked by any son of the deceased, and like a son he takes twice the share of a son's daughter at his level.
Real estates combine heirs — the calculator resolves the precise fractions for your family
Direct answer
How much does a grandson (son's son) inherit in Islam?
A son's son inherits as a residuary heir in place of a son when the deceased left no living son. He is blocked by any son of the deceased, and like a son he takes twice the share of a son's daughter at his level.
A son's son inherits as a residuary heir in place of a son when the deceased left no living son. He is blocked by any son of the deceased, and like a son he takes twice the share of a son's daughter at his level.
- Deceased left a living son → Blocked
- No son; grandson present → Residue (like a son)
- Grandson(s) with granddaughter(s) at same level → 2:1 ratio
- Combined heirs trigger blocking, ʿawl, and radd — use the Faraid calculator
- U.S. intestacy does not produce these shares — an Islamic will is required
The Grandson (son's son)'s Quranic Share by Situation
The basis is Surah An-Nisa 4:11 (by analogy). The share depends on which other heirs survive the deceased:
| Situation | Share | Note |
|---|---|---|
| Deceased left a living son | Blocked | A nearer son excludes the grandson through sons. |
| No son; grandson present | Residue (like a son) | Steps into the son's residuary role. |
| Grandson(s) with granddaughter(s) at same level | 2:1 ratio | Each grandson takes twice each granddaughter's share. |
When the Share Changes or Is Blocked
A son's son is blocked by any son of the deceased and by a nearer son's son. Only descendants through sons inherit by Faraid — a daughter's children are not Quranic heirs (they may be provided for via the optional bequest).
Example: a man's son predeceases him, leaving a grandson; the man then dies leaving a wife and that grandson
The wife takes 1/8 (a descendant exists). The grandson, standing in for his late father, takes the entire remaining 7/8 as the residuary heir — exactly as a son would have. Note that under U.S. and Islamic law alike, careful drafting matters here, since some systems would skip the grandson.
Want this resolved for your own family? Run it through the Faraid calculator — it applies blocking, ʿawl, and radd automatically.
Why U.S. Law Won't Deliver This Share
Whether a grandchild inherits when their parent predeceased the grandparent varies confusingly across U.S. states (per stirpes vs. per capita). An Islamic will removes the ambiguity and ensures a son's son inherits in the grandfather's place as Faraid intends.
An Islamic will is the only way to make sure the grandson (son's son)'s Quranic share is honored instead of your state's default intestacy rules. ShariaWiz builds scholar-reviewed, state-specific Islamic wills and trusts — an Islamic will from $199, with a built-in Faraid engine.
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Shares of other heirs
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Reviewed by: HalalWallet Editorial Team
Last reviewed: 2026-07-01
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