How Islamic Inheritance Works: A Plain-English Guide to Fara'id

Islamic inheritance, called Fara'id, is one of the most precisely specified legal systems in the Quran. More verses are devoted to it than to prayer, fasting, or zakat. But for most Muslims encountering it for the first time — usually when a relative dies — the rules can feel impenetrable: prescribed fractions that don't add up cleanly, heirs who block other heirs, special cases named after caliphs.

This guide walks through the system end to end, in plain language, with the Quranic source for every rule. By the end you should be able to read a Fara'id ruling and understand why it says what it says — and where there's legitimate scholarly disagreement.

A note up front: this article is educational. It describes how the classical schools have ruled, and where they differ. For an actual estate distribution, please consult a qualified mufti and an attorney for your jurisdiction.

Why Fara'id is so detailed

Pre-Islamic Arabian inheritance was restricted to adult male warriors. Women, children, and the elderly were typically excluded. The Quran upended this by assigning specific shares to women, parents, and children — fixed in scripture so they couldn't be negotiated away.

That's why the rules are so prescriptive. The point of Fara'id isn't flexibility; it's the opposite. By fixing shares in revealed text, the system ensures vulnerable heirs (a widow, a daughter, a mother) cannot be cut out by custom or pressure.

The six prescribed fractions

Every fixed-share heir receives one of exactly six fractions:

• 1/2, 1/4, 1/8
• 2/3, 1/3, 1/6

These six fractions appear directly in three Quranic verses — An-Nisa 4:11, 4:12, and 4:176 — which together specify the share of every primary heir. For example, 4:12 establishes the husband's and wife's shares:

And for you is half of what your wives leave if they have no child. But if they have a child, for you is one fourth of what they leave… And for them is one fourth of what you leave if you have no child. But if you have a child, for them is an eighth of what you leave…

Notice how the share depends on whether children exist. This is a recurring pattern in Fara'id: a heir's exact share changes based on who else is present. The same person might inherit 1/4 in one family, 1/8 in another, or be cut out entirely in a third.

Who inherits, and in what order

Heirs fall into three broad categories:

1. Fixed-share heirs (ashab al-furud) — Receive one of the six prescribed fractions. Includes spouses, parents, daughters in some configurations, and certain siblings.
2. Residuary heirs (asabah) — Receive whatever remains after fixed shares are distributed. The closest male descendant takes priority. A son is always asabah and is never blocked.
3. Distant kindred (dhawu'l-arham) — Inherit only when no fixed-share or residuary heirs exist. These rules differ across the schools.

Within each category, closer relatives take priority over more distant ones. A son blocks a grandson; a father blocks a paternal grandfather. This blocking is called Hajb, and it's the source of most surprise in Fara'id — perfectly valid heirs may receive nothing because someone closer is alive.

The three rules that handle the edge cases

Three special rules govern the math when prescribed shares don't fit cleanly:

1. Hajb — Blocking

When a closer heir prevents a more distant heir from inheriting. A son blocks his children (the grandchildren). A father blocks the paternal grandfather. Two or more siblings reduce the mother's share from 1/3 to 1/6 even though those siblings themselves may not inherit (they're blocked by the father). Blocking is the most common reason an expected heir gets nothing.

2. Awl — Proportional reduction

When the prescribed shares add up to more than the estate. For example: a deceased wife leaves a husband (1/2), two full sisters (2/3), and a mother (1/6). The fractions total 1/2 + 2/3 + 1/6 = 8/6 = 4/3, which exceeds 100%. Under Awl, every share is scaled down proportionally. The denominator increases from 6 to 8 so the shares fit:

• Husband: 3/8 instead of 1/2
• Two full sisters: 4/8 instead of 2/3
• Mother: 1/8 instead of 1/6

Awl was first applied by Caliph Umar ibn al-Khattab when he encountered exactly this kind of case, and the majority of scholars adopted his ruling.

3. Radd — Surplus redistribution

The opposite of Awl. When prescribed shares add up to lessthan the estate and there are no residuary heirs to claim the remainder, the surplus is redistributed proportionally back to the eligible fixed-share heirs.

Example: a deceased man leaves only a mother (1/3) and a daughter (1/2). Together that's 5/6 of the estate, with 1/6 unclaimed. Under Radd, the remaining 1/6 is split between mother and daughter in proportion to their original shares.

Where the four schools differ

The four Sunni schools — Hanafi, Maliki, Shafi'i, Hanbali — agree on the vast majority of Fara'id rulings. But there are well-known cases where they diverge. Three are worth knowing:

Umariatan — when a spouse, parents, and no children remain

Two named cases (after Caliph Umar's ruling). When the heirs are only a spouse, mother, and father:

• Husband + mother + father: husband 1/2, mother 1/3 of the remainder (= 1/6 of total), father takes the rest.
• Wife + mother + father: wife 1/4, mother 1/3 of the remainder (= 1/4 of total), father takes the rest.

The unusual move here is the mother taking 1/3 of what remains rather than 1/3 of the whole estate. The General, Maliki, Shafi'i, and Hanbali schools follow Umar; some minority opinions don't.

Musharakah — the "shared" case

When a husband, mother, two or more maternal half-siblings, and one or more full siblings remain. The maternal half-siblings receive a 1/3 share by Quranic prescription. In the non-Hanafi schools, full siblings (who would otherwise get nothing as residuary heirs after the husband and mother take their shares) join the maternal half-siblings in sharing that 1/3 — because, the reasoning goes, they share the same mother. The Hanafi school disagrees and gives the full siblings nothing.

Grandfather with siblings

When the deceased leaves no father but does leave a paternal grandfather alongside full or paternal-half siblings. Whether the grandfather blocks the siblings (Hanafi) or sharesthe residuary with them (Maliki, Shafi'i, Hanbali, with their own sub-rules) is a genuine difference. The same family can produce noticeably different distributions across the schools.

A worked example: Umariatan in practice

Let's walk through a concrete case. A man dies leaving a wife, his mother, and his father. No children, no siblings. Under the General/Sunni-majority opinion:

1. Wife: 1/4 (no children, by An-Nisa 4:12).
2. Mother: 1/3 of the remainder. The remainder after the wife's share is 3/4. One-third of 3/4 is 1/4 of the total estate.
3. Father: the rest, as residuary. That's 3/4 minus 1/4 = 1/2 of the estate.

Final distribution: Wife 25% (1/4), Mother 25% (1/4), Father 50% (1/2). That's exactly the Umariatan ruling — the mother gets 1/4 of the total, not 1/3 of the total (which would have been 33%).

Run the same scenario in the Hanafi school and you get the same answer. Try a different family — say, the wife has children — and Umariatan no longer applies, because the special case only triggers when there are no descendants.

How FairShare helps

FairShare is an iOS app that runs through these rules for any family scenario you describe. You answer a guided questionnaire — only relevant questions appear — and the app shows the result as a family tree, with the Quranic citation for every share one tap away.

You can switch between the five schools (General, Hanafi, Maliki, Shafi'i, Hanbali) and use a side-by-side Compare Schools view that highlights exactly where they differ for your specific family. Edge cases — Umariatan, Musharakah, Grandfather-with-siblings, Awl, Radd, Hajb — are detected and applied automatically.

FairShare runs entirely on-device, requires no account, makes no network calls, and is free. Get it on the App Store.

Further reading

For a deeper dive, the classical Fara'id treatises are still worth reading:

• Al-Risala by Ibn Abi Zayd al-Qayrawani — covers Maliki Fara'id within a broader fiqh primer.
• Al-Rahbiyya by Ibn al-Mutaqqin — a short, often-memorized Shafi'i Fara'id text used in many traditional study circles.
• Sirajiyya — the classical Hanafi Fara'id text. The English translation by Sir William Jones (1792) is in the public domain.

The contemporary AMJA (Assembly of Muslim Jurists of America) has published accessible English-language fatwas on Fara'id edge cases, useful when a real situation falls outside the standard scenarios.

A final reminder

Fara'id is a beautiful, internally-consistent legal system, and learning it is a worthwhile pursuit. But applying it to a real estate is a serious act with legal and spiritual stakes. Use FairShare and articles like this one to understand a distribution; consult a qualified scholar to executeone.