A Muslim's will (Wasiyyah) may allocate at most one-third of the estate to people or causes outside the fixed heirs — the remaining two-thirds must follow Faraid. Calculate your maximum permissible bequest below.
The Prophet ﷺ told Sa'd ibn Abi Waqqas (may Allah be pleased with him), who wished to leave his entire wealth in charity:
الثُّلُثُ، وَالثُّلُثُ كَثِيرٌ
"One-third, and one-third is a lot." (Sahih al-Bukhari & Sahih Muslim) — meaning a Muslim may bequeath up to one-third of their net estate to non-heirs (for example a charity, a distant relative, or a friend), while the remaining two-thirds is reserved for the fixed heirs under Faraid. A bequest to someone who is already a Quranic heir generally requires the other heirs' consent.
Maximum permissible bequest (⅓)
$0
Reserved for heirs under Faraid (⅔)
$0
⅓ — up to non-heirs
⅔ — fixed heirs (Faraid)
Disclaimer: This is general educational guidance, not a legally binding will. Bequest rules can vary by school of thought (madhhab) and require the other heirs' agreement in certain cases (e.g. leaving a share to an existing heir). Please prepare your actual will with a qualified Islamic scholar and, where relevant, a solicitor familiar with your local succession law.