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What Is a Codicil to a Will?
Home→Articles→Estate Planning Terms

What Is a Codicil to a Will?

Read about what a codicil is and how to use it to make amendments, additions, or deletions to an existing will.

SimplyTrustSimplyTrust Editorial·April 16, 2025·Updated September 25, 2025·2 min read

Contents

  • When Should You Use a Codicil?
  • How Does It Work?
  • Keeping Your Estate Plan Current
Estate Planning Terms

Life changes often mean your will needs an update. But rewriting the entire thing isn’t always necessary. Instead, you can use a codicil—a straightforward and legally recognized way to make changes without starting from scratch. (Note: You can also add clarification to your will using a letter of intent, although it’s not a legally binding document like a codicil.)

What Is a Codicil to a Will?

A codicil is a legal document used to make amendments, additions, or deletions to an existing will. Think of it as an official add-on that updates specific parts of your will without replacing the entire document. It ensures your estate plan stays current and reflects your latest wishes while keeping the original will intact.

For example, let’s say you initially left a family heirloom to your cousin but later decided your niece should have it. Instead of drafting a whole new will, you can write a codicil specifying that the heirloom goes to your niece instead.

When Should You Use a Codicil?

Using a codicil is practical when you need to make minor adjustments to your will. Some common reasons for creating a codicil include:

  • Changing the executor of your estate
  • Updating beneficiaries due to life changes like marriage, divorce, or the birth of a child
  • Modifying specific bequests, such as gifts of money or property
  • Adding or removing a guardian for minor children

How Does It Work?

Just like a will, a codicil must meet legal requirements to be valid. This usually involves:

  1. Clearly Identifying the Change: Specifying exactly what part of the will the codicil is modifying.
  2. Proper Execution: Signing the codicil in front of witnesses, following the same formalities as the original will.
  3. Keeping It With the Will: Storing the codicil with the original will to avoid confusion later.

Keeping Your Estate Plan Current

When life circumstances or estate plans change significantly, drafting a new will might be the way to go. (Or, better yet, getting a living or revocable trust that you can update at any time might be the way to go.) 

When making small changes, however, a codicil is a quick, efficient, and cost-effective way to keep a will up-to-date without rewriting everything. It ensures clarity and avoids potential conflicts among beneficiaries. (Or, again, you could just set up a revocable or living trust.)

#codicil