You can amend a will without a lawyer in every state, and there are two legal ways to do it: add a short amendment called a codicil, or write a new will that replaces the old one. Whichever route you take, the amendment has to be signed and witnessed with the same formalities as the original will. Miss a step and a probate court can throw the changes out, leaving your estate to be divided under default state rules you never chose.
Codicil or New Will
A codicil is a separate document that changes specific parts of your existing will while leaving the rest intact. It works well for narrow updates: swapping an executor, changing a beneficiary’s name after a marriage, adding a small gift you forgot. If you can describe the change in a sentence or two, a codicil is probably the right tool.
A new will is the better choice when the changes go beyond cosmetic. Divorce, a new child, a business you didn’t own before, a full rethink of who gets what — stacking codicils on an old will invites the kind of confusion that produces probate fights. Multiple codicils written years apart raise the odds of contradictions, and a court reading three or four amendments alongside an original will is far more likely to misread your intentions than a court reading one clean document. A common rule of thumb among estate planners: if you need more than one or two codicils, write a new will.
How to Write a Codicil
Title the document clearly. Something like “First Codicil to the Last Will and Testament of [Your Full Legal Name]” works. Below the title, identify yourself with your full name and address, and reference the original will by the date you signed it. That ties the codicil to the right document and removes any question about which will you are amending.
The body spells out each change in specific language. Vague instructions are the enemy. Instead of “I want to change my executor,” write “I amend Article III to remove John Doe as executor and appoint Jane Smith as executor.” If you are adding a new gift, name the recipient in full and describe exactly what they receive. Every change should point to the exact section or provision of the original will it modifies.
Close with a sentence confirming the rest of the will is untouched. Something like “In all other respects, I ratify and confirm my Last Will and Testament dated [date]” prevents anyone from arguing the codicil was meant to revoke the entire will. Without that language, an ambiguous codicil can be read as replacing provisions you meant to keep.
Signing and Witness Rules
A codicil must be executed with the same formalities as a will. You sign at the end of the document, and every state requires at least two witnesses to watch you sign and then sign the document themselves. The witnesses should also sign in each other’s presence. Louisiana adds a notary to this basic requirement, making it the only state that mandates notarization as part of ordinary execution.
Witnesses need to be “disinterested,” meaning they do not inherit anything under the will or the codicil. This is where do-it-yourself amendments most commonly fail. People ask a spouse, a child, or a close friend who happens to be named as a beneficiary. In most states, an interested witness does not automatically void the document, but it creates a legal presumption that the witness pressured you into making the gift. The witness then has to prove otherwise in court, and if they cannot, they may lose part or all of what you left them. Pick two neighbors, coworkers, or acquaintances who are not named anywhere in your estate plan.
You also need testamentary capacity at the moment you sign. That means you understand what property you own, who your heirs are, and what effect the codicil will have on their inheritance. If someone later challenges the amendment, the question will be whether you met that standard on the day you signed, not whether you were generally competent around that time.
Add a Self-Proving Affidavit
After the witnesses sign, take one more step: have everyone sign a self-proving affidavit in front of a notary public. This sworn statement by the witnesses confirms they watched you sign voluntarily and that you appeared to be of sound mind. Nearly every state recognizes self-proving affidavits, with only a handful of exceptions.
The payoff comes after your death. Without one, your witnesses may need to appear in probate court and testify that the signature is genuine and the signing followed proper procedure. If a witness has moved, become ill, or died, tracking them down or finding a substitute can delay probate for months. The notarized affidavit stands in for that live testimony. Notary fees generally run $5 to $15 per signature, which makes this one of the cheapest forms of insurance in estate planning.
Handwritten (Holographic) Amendments
Roughly half the states recognize holographic wills and codicils. A holographic codicil is one you write entirely by hand and sign yourself, with no witnesses required. Under the Uniform Probate Code, adopted in many states, a handwritten amendment to a typed will can function as a valid holographic codicil as long as the material portions are in your handwriting and you sign it.
Simple in theory, risky in practice. With no witnesses, there is no one to confirm you were of sound mind, that no one was standing over your shoulder, or that the handwriting is even yours. Those are precisely the arguments relatives use to challenge a will, and a holographic codicil gives them room to work. If you go this route, date the document clearly, write in your normal handwriting rather than printing if you usually write in cursive, and be as specific as possible about the changes. A vague note scribbled in the margin of your will almost certainly will not hold up.
Writing a New Will to Replace the Old One
When the changes are substantial enough to start over, the new will must be a complete, standalone document. It should cover everything: who gets your property, who serves as executor, who becomes guardian of any minor children, and any other instructions you want to leave. Do not write a new will that just references changes to the old one; a court will treat that as a codicil, and a confusing one.
The most important sentence in the new document is the revocation clause. “I revoke all prior wills and codicils” tells the court that this is the only document that matters. Without that clause, a court may try to read the old and new wills together as complementary. Newer provisions generally control when they contradict older ones, but “generally” is not the word you want governing your estate.
Once the new will is signed and witnessed, physically destroy every copy of the old will and any codicils. Shred them, burn them, or both. An old will sitting in a filing cabinet is an invitation for a disappointed heir to submit it to probate court and argue it was never revoked. Retrieve and destroy any copies stored with an attorney, a bank, or a family member.
Life Events That May Already Have Changed Your Will
Before you draft a codicil, check whether your existing will is still valid at all. Certain life events alter or void parts of a will by operation of law, regardless of what the document says.
In most states, getting married automatically revokes an existing will unless the will was explicitly written in anticipation of the marriage. If you made a will as a single person and then married without updating it, you may effectively have no will. Your spouse would inherit under state intestacy rules, which may or may not match what you would have chosen.
Divorce usually does not revoke the whole will, but it does void any provisions naming your ex-spouse as a beneficiary, executor, or trustee. Your ex is treated as if they died before you. If your will left everything to that spouse with no backup named, that portion passes as though you had no will.
The birth or adoption of a child after you sign your will can also trigger protections. Many states have “pretermitted heir” statutes that give an after-born child a share of your estate even if the will does not mention them. The purpose is to prevent accidental disinheritance, but the effect is that your planned distribution can be rearranged.
If any of these events apply to you, do not just amend. Confirm the existing will is still legally valid, because you may need to write an entirely new one.
What Happens If Your Amendment Fails
When a codicil fails because of improper execution, the court ignores it and enforces the original will as written. That is the best case. The worse outcome is when an invalid codicil creates enough ambiguity to bring the entire will into question.
If both documents are thrown out, your estate passes under state intestacy law. Every state has a default scheme. Typically a spouse gets the largest share, children split the remainder, and if there are neither, the estate works up to parents, siblings, and more distant relatives. Anyone you intended to provide for who is not a blood relative or legal spouse gets nothing. Charities, friends, stepchildren who were never formally adopted, and unmarried partners are shut out.
Intestacy is also slower and more expensive. The court appoints an administrator instead of an executor you chose, and that administrator often has to post a bond. Those costs come out of the estate.
Storing the Documents
A codicil must be physically kept with the original will. The two work as a single legal unit. If the probate court sees the will but not the codicil, the amendment will not be enforced. Clip or staple them together and keep them in the same place.
Many people default to a safe deposit box, and it creates a practical trap. When the box holder dies, the bank typically freezes access until a court-appointed personal representative appears with a death certificate and legal authorization. Some states allow a judge to order limited access just to search for a will, but even that requires a filing. If the will is the document your executor needs to get appointed, and the executor cannot reach the will without being appointed, you have built a loop.
Better options: a fireproof safe at home where your executor knows the combination, or filing the will directly with your local probate court, which some jurisdictions allow for a small fee. Whichever you pick, tell your executor exactly where to find the document. Courts in most states presume that a will known to exist but not found after death was intentionally destroyed, which means your estate would be treated as if you never wrote one.
When to Hire a Lawyer Anyway
Some situations genuinely call for professional help. If your estate approaches the federal estate tax threshold of $15 million per individual in 2026, the tax planning alone justifies the cost.1Internal Revenue Service. What’s New — Estate and Gift Tax Married couples can shield up to $30 million combined, but only with the right planning written into the will itself.
Other situations where a lawyer earns the fee: property in more than one state, an attempt to disinherit a spouse in a community property state (where you cannot will away their half of jointly owned assets), a blended family with competing interests, or a business that needs succession planning. Writing your own codicil to change an executor or add a small gift is well within reach. When a mistake could cost your family tens of thousands of dollars in unnecessary taxes or litigation, the few hundred dollars for a lawyer starts to look cheap.