The One-Third Rule: Wasiyyah, Charity and Gifts in Your NZ Islamic Will

One third is the entire discretionary space in a Muslim's estate plan. Everything else, after funeral costs and debts, flows to heirs in shares fixed fourteen centuries ago, which no preference of yours can redirect. That single number explains most of what makes Islamic wills different from ordinary New Zealand wills, where testators direct everything, and misunderstanding it produces the two most common drafting errors we see in community wills: oversized bequests, and bequests to people who already inherit. Both errors have clean fixes, and the free NZ template already implements them.

Where the rule comes from

The cap descends from the Prophet's answer to Sad ibn Abi Waqqas, who asked whether he could bequeath his wealth away and was permitted one third, with the observation that even a third is much, and that leaving heirs wealthy is better than leaving them dependent. The fatwa literature published by Darul Ifta New Zealand applies the framework directly, citing the relevant hadith in Tirmidhi: bequests to non-heirs and charities are permitted up to one third, and no bequest may be made in favour of an heir who already takes a fixed share, per the Prophet's declaration at the farewell pilgrimage that Allah has given each entitled person their right, so there is no bequest for an heir.

What the third is actually for

• Sadaqah jariyah: ongoing charity, the classic use, from mosque and school endowments to water projects, chosen while you are alive and thinking clearly
• People faraid does not reach: non-heir relatives such as grandchildren orphaned by a predeceased child in many configurations, foster and step relations, and non-Muslim family members who cannot inherit by faraid but can validly receive a wasiyyah, a use many scholars specifically commend
• Institutions and causes: religious bodies, charities and community organisations have no inheritance standing at all; the third is their only door into your estate

Two technical points keep the math honest. The third is calculated on the net estate, after funeral expenses and debts, not on the gross number in your head. And it is a ceiling, not a target: bequeathing less, or nothing, is entirely valid, and the Prophetic guidance leans toward restraint where heirs have need.

The automatic reduction, and why good drafting matters

What happens if your listed bequests add to more than a third? Under classical rules the excess requires the heirs' consent after death, an invitation to exactly the family conflict a will should prevent. The Darul Ifta NZ template solves it structurally: its clause 8 reduces all bequests proportionately and automatically if they exceed the cap, so no heir's consent is ever needed and no bequest silently invalidates the rest. If you draft your own will through a lawyer instead, insist on an equivalent clause; its absence is how careful intentions become courtroom questions.

Hiba: the other lever entirely

The one-third cap governs transfers at death. Transfers during life, hiba, gifts, follow different rules: you may give what you wish, to whomever you wish, including your own children, while you live, subject to fairness expectations between children in the fiqh. The Darul Ifta rulings draw the line cleanly: a transfer completed during life is a gift, a transfer taking effect at death is a bequest, and relabelling one as the other does not change its ruling. Deathbed gifts, in particular, are treated as bequests. This distinction is also practically important in New Zealand, where lifetime giving can reduce exposure to Family Protection Act claims against unequal estate distributions, though anything substantial deserves legal advice for its relationship property and fairness implications.

A worked example in NZD

An estate totals NZD 640,000 gross. Funeral costs come to NZD 12,000 and debts, including a purification amount the deceased had calculated but not yet paid, total NZD 28,000. The net estate is NZD 600,000, so the wasiyyah ceiling is NZD 200,000. The will leaves NZD 100,000 to a mosque building fund, NZD 60,000 to a non-Muslim sister who cannot inherit by faraid, and NZD 40,000 to an orphan sponsorship charity: exactly NZD 200,000, valid in full, with the remaining NZD 400,000 distributed to the heirs in their fixed shares. Had the same will listed bequests totalling NZD 250,000, the automatic reduction clause would scale each gift back by one fifth, to NZD 80,000, NZD 48,000 and NZD 32,000, no heir consent needed, no dispute created.

Notice two practical lessons inside the arithmetic. Debts, including religious debts like unpaid zakat, come out before the third is even calculated, which is one more reason to keep the zakat ledger current while alive rather than leaving executors to reconstruct it. And percentages beat fixed sums in drafting: a will that bequeaths one sixth of my net estate to a named charity scales automatically with the estate's actual size at death, while fixed dollar amounts written years earlier can silently blow through the cap or shrink to token gifts as fortunes change. The Darul Ifta template's proportionate-reduction clause protects against the first failure; thoughtful drafting protects against both.

A final drafting habit worth adopting: name a substitute for every bequest. Charities merge and wind up, and people predecease their benefactors; a bequest whose recipient no longer exists at your death fails and falls into the residue, quietly deleting the sadaqah you planned. One line naming an alternative recipient, or directing the failed gift to a general charitable purpose, keeps your third doing what you intended under circumstances you cannot foresee.

The disciplined summary: fixed shares are not yours to adjust, the third is yours to use well, the reduction clause keeps arithmetic from becoming conflict, and lifetime gifts are the tool for everything the third cannot do. Get the structure right in a valid will this month, using the complete NZ guide, and the estate planning hub for the rest of the toolkit.