A prenup and a last will both help protect the people you love, but they do different jobs. Your prenup sets rules for property during marriage. Your will says what you want to happen to property that is yours after you die. I think of it this way: the prenup helps draw the boundary around your estate; the will helps direct what happens inside that boundary.
That distinction matters in Indonesia, where inheritance rules are not one-size-fits-all. The applicable rules may depend on your circumstances, including whether the Civil Code or Islamic inheritance rules under the Compilation of Islamic Law (KHI) apply. So let’s look at what a will can do that a prenup generally cannot.
Name the People or Organizations You Want to Receive Your Property
Under Article 875 of the Indonesian Civil Code, a will is a revocable statement of what someone wants to happen after death. That makes a will the more direct tool for saying, “I want this person to receive this asset,” or “I want this organization to receive a gift.”
A prenup can help establish which property belongs to you or your spouse. It might set out separate-property arrangements, for example. But it is not a substitute for naming who should receive your property when you die. If you want your sibling, close friend, or a charitable organization to receive something, a properly prepared will is the tool designed for that purpose.
There’s an important limit: you cannot always leave everything to anyone you choose. Under the Civil Code, Article 913 protects certain close relatives through the legitime portie, or reserved share. In other words, a will gives you a say, not unlimited control.
Specify Gifts and Instructions for After Your Death
A will can be more precise than “my family can sort it out.” Depending on the inheritance rules that apply, you may be able to name a beneficiary for a particular asset or make a broader appointment to receive part of your estate. That can reduce uncertainty, especially when you own several kinds of property or want different people to receive different things.
A prenup can set rules about ownership and management between spouses. Under the Marriage Law article 35 and 36, property acquired during marriage is generally joint property, while property owned before marriage and gifts or inheritances are generally under each spouse’s control, unless the parties decide otherwise. Transactions involving joint property require both spouses’ consent.
That framework helps answer, “Whose property is this?” A will helps answer, “Who should receive my property after I die?” You need the first answer before the second can work properly. You can only direct property that is legally yours to give.
Put your wishes into a document that can be changed
A will is built around the testator’s wishes and, under Civil Code Article 875, can be revoked. That gives you a way to update your plans when life changes: a new child, a divorce, a new business, or a change in your relationship with a beneficiary.
A marriage agreement is a contract between spouses, not a unilateral estate-planning note. Under Article 29 of the Marriage Law, as interpreted by the Constitutional Court decision number 69/PUU-XIII/2015, spouses may make a written agreement before or during marriage by mutual agreement, with the required formalities. That flexibility is useful, but it is still about the spouses’ legal and property arrangements. It does not turn the agreement into a will or let one spouse unilaterally rewrite the other’s inheritance rights.
Name Someone to help Carry Out Your Instructions
Under the Civil Code, a will may also appoint an executor to help carry out the testator’s wishes. That can be useful when the estate includes several assets, multiple beneficiaries, or practical steps that need coordination.
A prenup cannot do that job. It can set property rules between spouses, but it does not appoint someone to administer your estate after your death. The executor’s role also does not erase legal limits or replace any required court or testamentary process. Think of it as naming a coordinator, not giving that person unlimited authority.
Make a limited bequest under Islamic inheritance rules
For Muslims whose inheritance is governed by the KHI, a will is called a wasiat. Articles 194–196 of the KHI, circulated under Presidential Instruction number 1 of 1991, set out key requirements: the person making the will must meet the stated age and capacity requirements, act voluntarily, and own the property being left. A will may be made orally before two witnesses, in writing before two witnesses.
The KHI generally limits a will to one-third of the estate. A larger amount requires the heirs’ agreement, and a bequest to an heir also requires the agreement of all heirs. So a will can create a route for a limited gift to someone who would not otherwise inherit, but it cannot simply override the KHI’s inheritance rules.
For Muslim couples, KHI Article 47 separately addresses marriage agreements about property, including arrangements for combining or separating assets, as long as they do not conflict with Islamic law. That’s another example of the difference: the agreement deals with marital property; the wasiat deals with a post-death bequest.
The Key Takeaway
Your prenup can help define what belongs to you and your spouse. Your will can say what you want done with your share after you die, identify beneficiaries, make permitted gifts, and appoint someone to help carry out your instructions. Neither document is a magic wand: reserved shares, the one-third limit under the KHI, formal requirements, and the applicable inheritance regime all matter.
I’d treat the prenup and will as complementary, not interchangeable. First clarify ownership. Then make a will that fits the inheritance rules that apply to you. For an actual estate plan, have an Indonesian lawyer at Wijaya & Co review both documents together; a technically valid will that tries to give away property you do not own is a recipe for a family dispute.
My name is Asep Wijaya, writing for Wijaya & Co. We orchestrate to assist you navigate. Thank you for reading my posts.