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Wasiyyah (Islamic Will) Calculator
The Wasiyyah (Islamic Will) calculator works out the maximum permissible bequest — one-third of the net estate after debts and funeral costs — and how much remains for the legal heirs.
Last updated: June 2026 · Free · No sign-up required
Results
Enter values above and click Calculate to see your result instantly.
Quick reference
| Step | $300k estate example |
|---|---|
| Estate | $300,000 |
| Less debts | −$20,000 |
| Less funeral costs | −$5,000 |
| Net distributable | $275,000 |
| Max wasiyyah (1/3) | $91,666.67 |
description One-third rule
Applies the Islamic limit that a bequest to non-heirs cannot exceed one-third of the net estate.
account_balance Debts first
Deducts debts and funeral costs before the bequest, as required.
family_restroom Heirs’ share
Shows the remainder reserved for the legal heirs.
Interpretation guide
| Order of settlement | Priority |
|---|---|
| 1. Funeral expenses | First charge on the estate |
| 2. Debts (incl. unpaid zakat/mahr) | Before any distribution |
| 3. Wasiyyah (≤ 1/3) | To non-heirs only, by default |
| 4. Fara’id shares | Remaining 2/3+ to Quranic heirs |
Formula & methodology
Formula: Max bequest = (estate − debts − funeral) ÷ 3; heirs receive the remainder
- Enter your gross estate, outstanding debts and expected funeral costs.
- The net estate is computed in the proper settlement order.
- Your intended bequest is compared with the one-third cap; any excess is flagged and the heirs’ share shown.
Worked example: $300,000 estate, $20,000 debts, $5,000 funeral → net $275,000; maximum wasiyyah $91,666.67. An intended $100,000 bequest exceeds the cap by $8,333 unless the heirs consent.
Frequently asked questions
What is the one-third rule in Islamic wills?
From the hadith of Sa’d ibn Abi Waqqas: bequests are capped at one-third of the net estate — "a third, and a third is much". The remaining two-thirds must flow to the Quranic heirs under fara’id.
Can I leave wasiyyah to my children?
By default no — "no bequest to an heir" (hadith): heirs already take fixed shares. A bequest to an heir requires the other heirs’ consent after death; this calculator assumes the standard non-heir wasiyyah.
What is deducted before the third is measured?
Funeral expenses first, then all debts — including religious debts like unpaid zakat, kaffarah and mahr. Only the remainder is divisible, exactly as the calculator sequences it.
What if my intended bequest exceeds one-third?
The excess is invalid unless the adult heirs consent after the death. The tool caps your figure and shows the overage so you can adjust the will now rather than burden the family later.
Do I still need a legal will document?
Absolutely — in most countries intestacy law overrides religious intent unless you execute a valid will. Have an Islamic-wills specialist draft one embedding fara’id and your ≤1/3 wasiyyah.