A codicil to a will is a separate legal document that amends an existing will without replacing it. Instead of rewriting your entire estate plan to change one detail, you sign a codicil that adds, removes, or modifies specific provisions and leaves the rest alone. During probate, the court reads the two documents together as a single combined instrument, and the codicil controls wherever its language conflicts with the original will.
When a Codicil Is the Right Tool
Codicils work best for targeted changes to a will that is otherwise still accurate. Swapping out an executor who has moved away or become unable to serve is a classic use. So is redirecting a specific gift, like leaving a piece of jewelry to a niece instead of a cousin, or adjusting a cash bequest to reflect what you can actually afford to give.
Other common situations include updating a beneficiary’s legal name after a marriage, revising burial or memorial instructions, or adding a bequest for a newly acquired asset you want a particular person to have. If the change is narrow enough that the rest of your will still reflects your wishes, a codicil keeps things simple.
When to Write a New Will Instead
Codicils have a shelf life. One codicil attached to a will is manageable. Two starts to create complexity. Three or more, and you are building a patchwork that invites confusion and contradictions, and every inconsistency between documents is a potential dispute during probate.
Certain changes are also too significant for a codicil to handle well. Changing the primary beneficiary of your estate, disinheriting someone who was previously included, or restructuring how assets are divided among multiple heirs all deserve a fresh will. These changes affect the entire architecture of your estate plan, and trying to accomplish them through a one-page amendment leaves too much room for misinterpretation.
A new will replaces everything that came before it and gives the probate court a single, self-contained document with no cross-referencing. If you find yourself wondering whether a particular change is big enough to justify a new will, that uncertainty is usually the answer. The additional cost of drafting a new will is modest compared to the legal fees your heirs would face sorting out conflicting documents in court.
Legal Requirements for a Valid Codicil
A codicil carries the same legal weight as a will, and the law holds it to the same execution standards. You must be of sound mind when you sign it, meaning you understand what you own, who your beneficiaries are, and what the codicil does. You also cannot be acting under pressure or manipulation from someone else.
In most states, a valid codicil must be:
- In writing. Oral amendments to a will are not enforceable.
- Signed by you. Your signature confirms the changes are intentional. If you are physically unable to sign, most states allow someone else to sign in your presence and at your direction.
- Witnessed. At least two witnesses must watch you sign the codicil, then sign it themselves in your presence and in each other’s presence. Witnesses should have no financial stake in your estate; a person who stands to inherit under the will or codicil can create grounds for a legal challenge.
A handful of states also recognize holographic codicils, which are handwritten and signed by you but do not require witnesses. The key requirement is that the material terms be in your handwriting. If your state does not recognize holographic documents, an unwitnessed codicil is worthless regardless of how clearly it expresses your wishes. Rules vary by jurisdiction, so check your state’s requirements before relying on a handwritten amendment.
What to Include in the Document
A codicil needs to do three things clearly: identify itself, identify the will it modifies, and spell out the change. Including the original will’s execution date is the simplest way to make the connection unambiguous, especially if you have signed more than one will over the years.
Beyond that identification, the document should include your full legal name, a clear description of the specific provision being changed, and the new language replacing it. If you are revoking a section, say so directly. If you are adding a new bequest, describe the asset and the recipient with enough detail that there is no room for confusion. The codicil should also include a statement confirming that all other provisions of the original will remain in effect. This “republication” language tells the court that the will and codicil work together as one unified document speaking from the date of the codicil.
Self-Proving Affidavits
During probate, a court normally needs to confirm that a will or codicil was properly signed and witnessed. That can mean tracking down your witnesses to testify, which becomes a real problem if they have moved, forgotten the details, or died. A self-proving affidavit eliminates this step.
A self-proving affidavit is a notarized statement, signed by you and your witnesses at the time of execution, confirming that all legal formalities were followed. When the court sees this affidavit attached to your codicil, it can accept the document without requiring live witness testimony. Most states recognize self-proving affidavits.
Adding one is straightforward. After you and your witnesses sign the codicil, all of you appear before a notary public, verify your identities, and sign the affidavit under oath. The notary completes a certificate and applies an official seal. The affidavit should then be securely attached to the codicil. If you are already going through the formality of a signing ceremony, this step costs little extra effort and can save your executor significant time and expense down the road.
Signing and Storing the Codicil
Treat the signing as a deliberate event, not something done casually at a kitchen table. Gather your two witnesses, have them watch you sign and date the codicil, and then have each witness sign in your presence and in the presence of the other witness. If you are adding a self-proving affidavit, a notary should be present at the same ceremony.
After execution, store the codicil with the original will. Physically attaching it to the will is the safest approach. If the two documents are stored separately, there is a real risk the codicil will never be found. Your executor would then submit only the original will for probate, and your estate would be distributed according to provisions you deliberately changed. If your will is held by an attorney, a court clerk’s office, or in a safe deposit box, the codicil belongs in the same location.
Revoking a Codicil
Changing your mind about a codicil is straightforward. The most common approach is to write a new codicil that expressly revokes the earlier one. You can also execute an entirely new will, which automatically revokes all prior wills and codicils. Either way, the replacement document needs to meet the same execution formalities as the codicil it replaces.
You can also revoke a codicil through a physical act: tearing, burning, or otherwise obliterating the document, as long as you do so with the clear intent to revoke it. If someone else performs the act, they must do it in your presence and at your direction. Simply misplacing a codicil or crossing out a word does not reliably revoke it, and a court may still try to enforce a damaged document if the intent to revoke is unclear. The cleanest revocation is always a written one.
Marriage and Divorce Are Different
Most states automatically revoke any provisions in your will that benefit a former spouse once a divorce is finalized. This typically includes gifts of property, appointments as executor or trustee, and powers of appointment granted to the ex-spouse. The law treats the former spouse as though they disclaimed those provisions or predeceased you. Relatives of your former spouse named in the will may also lose their bequests, depending on your state’s rules.
Marriage can trigger different effects. Some states revoke an existing will entirely when you marry, while others give a new spouse the right to claim a share of the estate as though you died without a will. Either way, marriage and divorce are not situations where a codicil is enough. They warrant a complete review of your estate plan and, almost always, a new will.
What a Codicil Typically Costs
If you hire an estate planning attorney to draft and oversee the execution of a codicil, expect to pay somewhere between $150 and $500 for a simple amendment. The range depends on your location, the attorney’s experience, and how complex the change is. Attorneys in major metropolitan areas charge more, and a codicil that requires careful coordination with trust documents or tax planning will cost more than one that simply swaps an executor’s name.
Online legal services and DIY templates are cheaper, often under $100, but no one reviews your specific situation for errors or unintended consequences. A codicil that contradicts your will in ways you did not anticipate can cost your heirs far more to litigate than the attorney fee you saved. For straightforward changes to a simple will, a template may be fine. For anything involving trusts, tax implications, or multiple beneficiaries, professional help is worth the investment.