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Iowa Will Requirements
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Iowa Will Requirements

Iowa will requirements: full-age and sound-mind capacity, a signed writing, two witnesses who sign together, self-proving affidavits, and no holographic wills.

By Settled Editorial

Iowa will requirements sit in one part of the Iowa Probate Code, and most people want the short answer first. To be valid in Iowa, a will must be in writing, signed by the testator (or by another person at the testator's direction and in the testator's presence), declared by the testator to be their will, and signed by two competent witnesses in the presence of the testator and of each other. The maker must be of full age and sound mind. Iowa does not accept a handwritten will with no witnesses, and it has no ordinary spoken will. (See Iowa Code 633.279 and Iowa Code 633.264.)

Use this page as a planning map, not as a signing kit. Iowa courts apply these rules to the exact facts of each will, and one small signing mistake can put a will at risk in probate. When real estate, a blended family, or a possible dispute is in the picture, talk with a licensed Iowa attorney before you sign.

This guide pairs with the Iowa probate guide for what happens after death, and with the Iowa intestate succession guide for who inherits when no valid will exists.

Who Can Make a Will in Iowa

Two capacity rules come first. Iowa Code 633.264 says any person of full age and sound mind may dispose of their property by will. Full age in Iowa means 18, because the period of minority runs to age 18 under Iowa Code 599.1, and a minor also reaches majority by marriage. (Source: Iowa Code 633.264 and Iowa Code 599.1.)

In plain terms:

  • Age. The maker must be at least 18, or a younger person who has reached majority by marriage.
  • Sound mind. The maker must understand, in a general way, that they are making a will, what they own, and who would normally receive it. Courts call this testamentary capacity. A will signed by someone of unsound mind can be set aside.

Courts judge capacity at the moment of signing, not before or after. A later illness does not undo a will that was valid when the testator signed it.

The Signing Rules Iowa Requires

Iowa Code 633.279 sets the execution rules, and every valid Iowa will has to meet all of them. Here is the checklist the statute draws. (Source: Iowa Code 633.279.)

  1. Writing. The will must be in writing. Iowa has no valid oral will.
  2. The testator's signature. The testator signs the will. If the testator cannot sign, another person may write the testator's name, but only in the testator's presence and at the testator's express direction.
  3. A declaration. The testator declares the document to be their will.
  4. Two competent witnesses. At the testator's request, two competent people sign as witnesses, in the presence of the testator and in the presence of each other.

The two-witness rule is stricter than many people expect. Both witnesses have to sign in front of the testator and in front of each other. A witness who signs later, alone, or in another room breaks the chain and can sink the will at probate. Iowa reads presence broadly: the witnesses and the testator satisfy the rule when they can see and hear each other's acts in real time, whether in the same room or by a live electronic connection. Pick adults who are not receiving anything under the will when you can, and keep them reachable for probate.

Iowa Does Not Allow Handwritten or Oral Wills

A frequent question: does Iowa accept a will you wrote out by hand and never had witnessed? The answer is no. Iowa has no holographic will statute. Iowa Code 633.279 requires two witnesses for a will, and the only carve-out is Iowa Code 633.283, which honors a will that was validly signed under another state's or country's law. A handwritten page with no witnesses, signed only by the maker in Iowa, does not qualify. (Source: Iowa Code 633.283.)

Iowa also has no ordinary spoken will (a nuncupative will). Do not rely on a verbal statement of your wishes, a note in a drawer, or a text message as a stand-in for a signed, witnessed will.

Who Can Serve as a Witness

Iowa Code 633.280 keeps the witness bar low. Any person who is 16 or older and competent to be a witness in Iowa may act as an attesting witness. So a mature teenager can witness, though most people pick adults who will be easy to locate years later. (Source: Iowa Code 633.280.)

Witnesses Who Also Inherit

Here is where Iowa parts ways with some states. A gift to a witness does not void the will, but it can shrink that witness's gift. Under Iowa Code 633.281, if an interested witness (a witness the will leaves property to) is one of only two witnesses, that witness forfeits the part of the gift that is worth more than what they would have received had the testator died with no will. If two other competent and disinterested witnesses also signed, the gift stands in full. A witness who inherits nothing under the will is not treated as interested. (Source: Iowa Code 633.281.)

The safer move is to use witnesses who take nothing under the will. That removes the forfeiture question and any later argument about bias or pressure.

Self-Proving Affidavits

Iowa lets you make a will self-proved, which spares your executor from tracking down witnesses at probate. Iowa Code 633.279 lets the testator and both witnesses swear a short affidavit before a notary, either at the signing or any time later. A self-proved will counts as proof of proper execution and can be admitted to probate without live testimony from the witnesses. (Source: Iowa Code 633.279.)

What this means for your will:

  • A self-proving affidavit is optional. A will signed the right way is valid without one.
  • The affidavit does not replace the witnesses at signing. It is an extra sworn, notarized statement by the testator and the same two witnesses.
  • With the affidavit attached, the Clerk of the District Court can usually admit the will even if a witness has since died or moved.

Adding a self-proving affidavit is the simplest way to help a typed Iowa will move through probate without snags.

Does an Iowa Will Need a Notary

Iowa does not require a will to be notarized to be valid. A notary matters only for the optional self-proving affidavit, which speeds up probate but is not part of validity itself. A will signed by the testator and two competent witnesses is valid with no notary at all.

Fixing a Defective Will With a Codicil

If a will was signed with a flaw, a properly signed codicil can rescue it. Under Iowa Code 633.282, when a validly executed codicil clearly identifies the earlier will, the two are read as one instrument and the execution of both is treated as sufficient. Sign any codicil with the same two-witness formality you would use for a new will. (Source: Iowa Code 633.282.)

How an Iowa Will Is Revoked or Revived

A valid will can be undone, and the method matters. Iowa Code 633.284 says a will is revoked only by (1) canceling or destroying it, by the testator or at the testator's direction, with the intent to revoke, or (2) signing a later will. One Iowa wrinkle catches people: if you revoke by canceling the document itself, that cancellation has to be witnessed the same way you would witness a new will. A revoked or invalid will does not spring back on its own either. To bring it back, the testator must re-execute it, or sign a new will or codicil that incorporates the old one by reference. (Source: Iowa Code 633.284.)

Divorce Revokes Gifts to a Former Spouse

Divorce rewrites part of your will by operation of law. Under Iowa Code 633.271, once you divorce or your marriage is dissolved, every provision in the will in favor of your former spouse is revoked, and so is every provision in favor of a relative of that former spouse, unless the will says otherwise. That reaches gifts, appointments of property, and any job you gave them, such as executor or trustee. If you and that spouse later remarry each other, the revoked provisions come back unless you revoked them another way. Because divorce cuts an ex-spouse (and their relatives) out on its own, review your whole plan after any divorce. Your will, your beneficiary designations, and any trust may each follow different rules. (Source: Iowa Code 633.271.)

After You Sign: Store and File the Original

The original signed will is what the court needs, so store it where your executor can find it and tell them where it is. Iowa also puts a duty on whoever holds the will. Under Iowa Code 633.285, after learning of the death, the person with custody of the will must deliver it to the District Court with jurisdiction over the estate. Someone who willfully refuses a court order to hand it over can be held in contempt and can owe damages to anyone hurt by the delay. A safe-deposit box, a fireproof home safe, or your attorney's file all work, as long as the right people know where to look. (Source: Iowa Code 633.285.)

What This Means for Your Plan

If you want an Iowa will that holds up, the clean version usually looks like this:

  1. Confirm the maker is at least 18 (or married) and of sound mind.
  2. Put the will in writing and have the testator sign it, or have someone sign the testator's name at the testator's direction and in the testator's presence.
  3. Have the testator declare it to be their will in front of two competent witnesses, and have both witnesses sign while they and the testator can all see and hear each other.
  4. Use witnesses who take nothing under the will.
  5. Add a notarized self-proving affidavit so the witnesses do not have to appear at probate.
  6. Store the original where your executor can reach it.

A will is one piece of an Iowa estate plan. Many people pair it with documents that work during life and with tools that skip probate. See the Iowa power of attorney guide and the Iowa health care directive guide for the lifetime documents, the Iowa guide to avoiding probate for probate-reduction tools, and the Iowa executor duties guide for the job an executor takes on once a will is admitted. When a signing formality is missed or a will is signed under pressure, these same rules become the grounds to challenge it; see how to contest a will in Iowa. For the full path an estate takes through the District Court, start at the Iowa probate guide or the Iowa county probate directory.

This guide is general information about Iowa wills, not advice for your situation. Confirm anything that affects your estate with the Clerk of the District Court or a licensed Iowa attorney before you sign or rely on a will.

Sources:

It is not legal advice.

Prefer to talk it through? Connect with an estate-planning attorney

Settled Estate is not a law firm and does not give legal advice.

Information current as of July 15, 2026

Settled Estate is not a law firm, and this content is for informational purposes only and does not constitute legal advice. Probate laws and procedures in Iowa can change. Consult with a qualified attorney for advice specific to your situation. Full disclaimer.

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