The Optional One-Third: What You Can Actually Do With Your Wasiyyah

Of all the moving parts in an Islamic estate plan, the one-third is the part people tend to light up about. The fixed shares can feel a little like math homework: necessary, precise, not exactly exciting. But the one-third is different. The one-third is yours to direct. It’s where your values, your gratitude, and your sense of legacy get to speak.

And in my experience, it’s the most underused tool a Muslim has. Plenty of people know it exists. Far fewer have actually decided what to do with it.

 

Where the one-third comes from

The bulk of a Muslim’s estate is governed by faraid, the fixed shares we’ve written about elsewhere. But Islam carves out room, up to one-third of the net estate, for a wasiyyah: a bequest you choose yourself. The ceiling traces back to a well-known hadith. When Sa’d ibn Abi Waqqas, gravely ill, asked the Prophet (peace be upon him) whether he could give away most of his wealth, he was told no, and even one-third, the Prophet said, is plenty, adding that it is better to leave your heirs well-off than to leave them dependent on others.

So one-third is a ceiling, not a target. You can leave less. Many people do. But that space is yours to use deliberately, and it’s a gift the tradition specifically built in.

 

The one rule you can’t break: no bequest to an heir

Before the fun part, the single firm boundary. The one-third cannot be used to give more to someone who is already an heir. The Prophet (peace be upon him) said that Allah has already appointed each person who has a right their due, “and no bequest must be made to an heir.”

In practice, that means you can’t use the wasiyyah to quietly hand your spouse, your son, your daughter, or your parents an extra slice on top of their fixed share. Their share is already settled by faraid. (Most scholars allow an exception only if every other heir freely consents after your death, not something to build a plan around.) The one-third is meant to reach the people and causes that the fixed shares leave out.

 

So who, and what, can it go to?

This is where it gets meaningful. The one-third can become ongoing charity, sadaqah jariyah, the kind that keeps earning reward long after you’re gone: a contribution to your masjid, a water well, a scholarship fund, a share in a waqf endowment. For many people this is the heart of their legacy, the part of the estate that keeps doing good in their name.

It can also reach the relatives faraid leaves out. A non-Muslim parent or sibling, who under classical rules does not inherit, can be remembered through the one-third. So can grandchildren whose own parent passed before you, and who therefore don’t take a share directly, a situation that breaks a lot of hearts, and one the wasiyyah is well suited to soften.

And it can recognize the people who simply mattered. An adopted or foster child you raised but who isn’t a Quranic heir. A loyal friend. A caregiver who showed up when it was hard. A debt of gratitude you always meant to repay. Sponsoring someone’s Hajj, supporting an orphan, funding a cause you believe in. Within that one-third, these choices are yours to make.

 

Making Your Wasiyyah Actually Stick In Illinois

Here’s where intention meets paperwork. A wasiyyah that lives only in your heart, or in a note in a drawer, is not something an Illinois probate court will carry out. To be enforced, your bequest has to sit inside a valid Illinois will or trust, properly signed and witnessed, with charities and individuals named clearly enough that there’s no ambiguity about who receives what.

This is exactly the kind of thing that’s straightforward when it’s done right and a genuine mess when it’s improvised. We draft the one-third into your plan so that your charitable and personal bequests are honored under Illinois law and your fixed shares still flow correctly under faraid, the two halves working as one document.

One more practical word: a wasiyyah isn’t something you set once and forget. Charities merge or close, relationships change, the cause that mattered most to you at forty may not be the one that matters at sixty. I tell clients to revisit the one-third whenever they review the rest of their plan, every few years, or after any big change in the family. It takes ten minutes and it keeps your intentions current.

If you’ve never decided what your one-third should do, I’d gently encourage you to sit with that question. It’s a rare chance to put your values on paper in a way that outlasts you. When you’re ready to make it real and enforceable, that’s what we’re here for.