The Difference Between a Prenup and a Will
Published on: 24 Mar 2025
When it comes to protecting your financial future, two legal tools often come up: prenuptial agreements (prenups) and wills. While both documents help manage your assets, they serve very different purposes. One focuses on your rights during and after marriage, while the other outlines what happens to your assets after death.
If you're getting married, have children, or own property or investments, understanding the difference between a prenup and a will is essential. This guide breaks down what each document does, how they work together, and why having both may be the smartest decision for your long-term financial security.
What Is a Prenup?
A prenuptial agreement is a legally binding contract signed before marriage. It sets the terms for how finances, property, and debts will be handled during the marriage and in the event of divorce or legal separation.
A prenup can:
- Protect assets you owned before the marriage
- Determine how marital property will be divided in divorce
- Assign responsibility for debts
- Address spousal support or alimony
- Clarify ownership of businesses or family inheritances
The primary goal of a prenup is to give both spouses control over how financial matters are handled if the relationship ends.
What Is a Will?
A will is a legal document that specifies how your assets should be distributed after your death. It can also name guardians for your children and designate someone to manage your estate.
A will can:
- Leave assets to specific people or charities
- Name a guardian for minor children
- Appoint an executor to carry out your wishes
- Ensure family heirlooms or personal items go to the right individuals
A will only takes effect after you pass away. Its purpose is to make sure your wishes are honored and to avoid legal battles over your estate.
When Each Document Takes Effect
A prenup becomes effective once you’re legally married and is mainly used to guide what happens if the marriage ends—either by divorce or legal separation.
A will, on the other hand, only becomes active upon your death. It has no effect during your lifetime and is primarily about how your estate is handled after you're gone.
What They Cover
Prenups focus on marriage-related financial matters. These include the division of assets and debts, business interests, income, real estate, and support obligations if the marriage ends.
Wills focus on end-of-life planning. They cover the distribution of property, management of your estate, and care of minor children.
Prenups typically do not replace or override a will, but they can work together—especially when it comes to limiting a spouse’s rights to your estate.
Can They Be Updated?
Yes, both prenups and wills can be updated. A prenup can be modified at any time after marriage as long as both spouses agree in writing. This is helpful if your financial situation changes, such as starting a business or buying a home together.
Wills can also be updated as often as you like, typically through a document called a codicil or by drafting a new will. It's a good idea to review and update your will after major life events like marriage, having children, or acquiring new assets.
Do You Need Both a Prenup and a Will?
Absolutely—especially if you want full control over your financial life. A prenup ensures that your finances are clearly defined during your lifetime and in the event of divorce. A will ensures that your assets go to the right people when you pass away.
If you’re entering a second marriage, have children from a previous relationship, or own a business or family inheritance, having both documents is especially important. A prenup can prevent your spouse from claiming property you want to leave to your children, while a will ensures those instructions are followed after your death.
Real-Life Scenarios
Imagine you're entering a second marriage and want to leave your house to your children from your first marriage. A prenup can confirm that your spouse won’t claim the house in a divorce, and a will can direct that it goes to your children when you pass.
Or consider a couple where one partner owns a business. A prenup can protect the business from being split in a divorce, while a will can pass the business to a sibling or partner rather than the spouse.
How prenups.ai Helps
At prenups.ai, we make it easy to create a customized, legally valid prenuptial agreement that reflects your unique situation. Whether you want to protect your property, manage debt, or establish clear expectations for the future, our platform simplifies the process and ensures legal compliance with your state’s laws.
You can pair your prenup with a will prepared by an estate planning tool or attorney for a complete financial plan that covers every stage of life.
Final Thoughts
A prenup and a will serve two different—but equally important—functions. A prenup gives you and your partner financial clarity during marriage and protection in case of divorce. A will ensures that your assets go to the right people after you’re gone.
Together, these documents offer a comprehensive way to protect your future, your family, and your financial legacy.
📌 Start your prenuptial agreement today with prenups.ai and take the first step toward building a secure financial future.