How to Write a Will: A Step-by-Step Guide

8 min read · Updated June 13, 2026

A will is the most fundamental estate planning document you can have. Yet roughly 68% of American adults have no will at all.¹ Writing one is less complicated than most people assume. This guide walks through each step, the legal requirements that vary by state, and the mistakes most likely to make a will unenforceable.

What a Will Actually Does

A last will and testament is a legal document that directs how your property is distributed after you die, names an executor to carry out those instructions, and — critically — names a guardian for any minor children.² Without one, your state’s intestacy laws decide who gets what, and a probate court appoints a guardian for your children, potentially someone you would not have chosen.³

What a will does not do: it cannot override beneficiary designations on retirement accounts, life insurance policies, or bank accounts set up with a payable-on-death (POD) feature.⁴ Those assets pass directly to the named beneficiary regardless of what your will says.

Legal Requirements for a Valid Will

Requirements vary by state, but the Uniform Probate Code — adopted in whole or in part by about 20 states — sets the baseline most jurisdictions follow.⁵

The testator must:

• Be at least 18 years old (or legally emancipated)⁶
• Be of “sound mind,” meaning they understand what a will is, what property they own, who their natural heirs are, and what they are signing⁷

The document must:

• Be in writing (typed or handwritten)
• Be signed by the testator, or by another person at the testator’s direction if the testator cannot sign⁸
• Be witnessed by at least two adults who are present when the testator signs, and who are not beneficiaries under the will⁹

Notarization: Most states do not require notarization to make a will valid. However, a self-proving affidavit — a notarized statement signed by the witnesses — allows the will to skip the witness testimony step in probate court, which speeds up administration considerably.¹⁰

Holographic wills: About 26 states permit holographic wills — entirely handwritten and signed by the testator, with no witnesses required.¹¹ These are legally valid in those states but carry significant risk: unclear handwriting, missing clauses, and ambiguous language are far more common and harder to challenge after death.

Step 1: Take Inventory of Your Assets

Before writing a single word, list everything you own and how it is titled:

• Real property: Your home, investment properties, vacation property — and how title is held (sole owner, joint tenants, tenants in common)
• Financial accounts: Checking, savings, brokerage accounts, CDs
• Retirement accounts: 401(k), IRA, Roth IRA — note that these pass by beneficiary designation, not will
• Life insurance: Policies and named beneficiaries
• Business interests: Sole proprietorships, LLC membership interests, stock in private companies
• Personal property: Vehicles, jewelry, art, collectibles, furniture
• Digital assets: Cryptocurrency, online accounts, domain names, intellectual property¹²

Step 2: Choose Your Beneficiaries

Decide who receives each asset. You can leave property to:

• Individuals (by name, with their relationship and birth date to avoid ambiguity)
• Charitable organizations (use the full legal name and EIN if possible)
• A trust you have already established

Be specific about personal property. Vague language (“I leave my jewelry to my daughters equally”) creates disputes. A separate personal property memorandum, referenced in the will, lets you update specific bequests without amending the will itself — permitted in many states under the Uniform Probate Code.¹³

Name contingent beneficiaries. If your primary beneficiary dies before you and you have not named an alternate, the asset falls into your residuary estate and is distributed under the general terms of the will.

Step 3: Choose Your Executor

The executor (called a “personal representative” in many states) is the person responsible for filing the will with probate court, notifying creditors, paying debts and taxes, and distributing assets.¹⁴ This is a substantial administrative job that can take 12–24 months for a complex estate.

Choose someone who is:

• Organized and detail-oriented
• Geographically accessible (some states require an in-state executor or a registered agent)
• Capable of remaining neutral if beneficiaries disagree
• Willing — always ask before naming someone

Name at least one successor executor in case your first choice cannot serve.

Step 4: Name a Guardian for Minor Children

For most parents, this is the most important clause in the entire document. The guardian you name is not guaranteed — a probate court makes the final determination based on the child’s best interest — but courts give strong weight to the parents’ expressed wishes.¹⁵

Name both a personal guardian (who raises the children) and a property guardian or trustee (who manages any inherited assets). These can be the same person or different people; often it makes sense to separate the roles.

Step 5: Draft the Document

A valid will must include:

1. Opening declaration: “I, [full legal name], residing in [county, state], declare this to be my last will and testament, and I revoke all prior wills and codicils.”
2. Executor appointment: Name your executor and successor executor, and grant them powers (sell property, open accounts, handle litigation) without requiring court approval for each action.
3. Guardian appointment (if applicable)
4. Specific bequests: Named gifts of particular items or dollar amounts
5. Residuary clause: Disposes of everything not covered by specific bequests — this is the catch-all and one of the most important clauses
6. Survivorship clause: Specifies what happens if a beneficiary dies shortly before or after you (a common approach is a 30-day survival requirement)
7. Signature block and witness attestation

Step 6: Sign It Correctly

Signing errors invalidate more wills than any substantive drafting problem.

1. Print the final document
2. Read through it one final time before signing
3. Sign at the end in the presence of both witnesses simultaneously
4. Have each witness sign in your presence and in the presence of each other
5. Do not sign in advance and present a pre-signed will to witnesses — this can void the document in many states¹⁶
6. If you want a self-proving affidavit, a notary must also be present to notarize the witness signatures

Step 7: Store It Safely and Tell the Right People

A will that cannot be found is effectively useless. Store the original in a fireproof safe, a bank safe deposit box, or with your attorney.¹⁷ Many states also permit filing a will with the probate court during your lifetime for safekeeping.

Tell your executor where the original is located. If you keep it in a safe, make sure at least one trusted person knows the combination or has access.

Do You Need an Attorney?

You are not legally required to hire an attorney to write a will. Simple estates — a primary residence, savings accounts, straightforward family situation — are often well served by reputable online tools such as those offered by LegalZoom, Nolo, or Trust & Will.

However, consider an estate planning attorney if you have:

• A blended family or children from multiple relationships
• A child or beneficiary with special needs (a will alone may disqualify them from Medicaid or SSI)
• A taxable estate (over $13.99 million federally in 2025, or lower state thresholds in Massachusetts, Oregon, and others)¹⁸
• Business interests, complex real estate holdings, or assets in multiple states
• A non-citizen spouse

An attorney’s fee for a basic will typically ranges from $300 to $1,000 depending on your location and the complexity of your estate.¹⁹

Common Mistakes That Invalidate Wills

• Missing or interested witnesses: A beneficiary who also serves as a witness can void their own bequest in many states
• Unsigned or undated documents: Courts have refused to admit wills found on computers that were never printed and signed
• Handwritten changes: Writing on a printed will after signing does not update it — it can void the entire document; use a formal codicil instead
• Outdated beneficiary information: Wills that name a deceased beneficiary with no alternate create probate complications
• Failure to update after major life events: Marriage, divorce, new children, and significant asset changes all require will review²⁰

References

1. Caring.com, “2024 Wills and Estate Planning Study,” caring.com/caregivers/estate-planning/wills-survey/
2. Cornell Law School Legal Information Institute, “Will,” law.cornell.edu/wex/will
3. Cornell Law School Legal Information Institute, “Intestate succession,” law.cornell.edu/wex/intestate_succession
4. Internal Revenue Service, “Retirement Topics — Beneficiary,” irs.gov/retirement-plans/plan-participant-employee/retirement-topics-beneficiary
5. Uniform Law Commission, “Uniform Probate Code,” uniformlaws.org/committees/community-home?CommunityKey=a539920d-c477-44b8-84fe-b0d7b1a4cca8
6. Uniform Probate Code § 2-501, uniformlaws.org
7. In re Estate of Kumstar, 487 N.E.2d 271 (N.Y. 1985); Cornell LII, “Testamentary capacity,” law.cornell.edu/wex/testamentary_capacity
8. Uniform Probate Code § 2-502(a)
9. Uniform Probate Code § 2-502(a)(3)
10. Uniform Probate Code § 2-504, “Self-proved will”
11. Uniform Law Commission, “States that allow holographic wills,” uniformlaws.org
12. Revised Uniform Fiduciary Access to Digital Assets Act (RUFADAA), uniformlaws.org/committees/community-home?CommunityKey=f7237fc4-74c2-4728-81c6-b39a91ecdf22
13. Uniform Probate Code § 2-513, “Separate writing identifying devise of certain types of tangible personal property”
14. Cornell Law School Legal Information Institute, “Executor,” law.cornell.edu/wex/executor
15. American Bar Association, “Guardianship,” americanbar.org/groups/real_property_trust_estate/resources/estate_planning/guardianship/
16. In re Will of Ranney, 124 N.J. 1 (1991); note on simultaneous execution requirement
17. American Bar Association, “Where to Keep Your Will,” americanbar.org
18. Internal Revenue Service, “Estate Tax,” irs.gov/businesses/small-businesses-self-employed/estate-tax
19. Nolo, “How Much Does It Cost to Make a Will?” nolo.com/legal-encyclopedia/how-much-does-a-will-cost.html
20. American Bar Association, “When Should You Update Your Estate Plan?” americanbar.org

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