How to Make a Will in 2026: A Step-by-Step Guide

What a Will Does (and What It Cannot Do)

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 names a guardian for any minor children. That last part is the one people forget. A will is where you write down who raises your kids if you and your co-parent are gone, and that single decision is often the most important reason to have one.

The numbers say most people haven't gotten around to it. A 2025 Wills and Estate Planning Study from Caring.com found that roughly three-quarters of American adults cite the same few reasons for not having a will: they haven't gotten to it, they don't think they have enough assets, or they assume it's expensive and difficult. None of those hold up well. Writing a basic will is something many people finish in a single afternoon.

Here's the part that surprises people: a will controls fewer of your assets than you'd expect. It only governs probate assets, meaning property that passes through the court process after death. Several major categories move outside your will entirely, no matter what the document says:

• Retirement and life insurance beneficiary designations. Your 401(k), IRA, and life insurance policy pass directly to whoever you named on the account. If your will says one thing and your beneficiary form says another, the form wins.
• Payable-on-death (POD) accounts. Bank accounts with a POD feature pass straight to the named person.
• Jointly held property with right of survivorship. A home you own jointly with your spouse passes automatically to the surviving owner.
• Trust assets. Anything held in a trust operates under the trust's own terms, outside the will.

A will also doesn't avoid probate. Assets that pass through a will go through the probate process, a court-supervised procedure that can take months. And a will takes effect only when you die. It does nothing while you're alive.

One quick distinction that trips people up. A will is not the same as a living will. Your will says how your assets go to your beneficiaries after you pass. A living will (a type of advance healthcare directive) describes the medical treatments you do or don't want if you're incapacitated and can't speak for yourself. Different documents, different purposes, and most complete plans include both.

Legal Requirements for a Valid Will in 2026

You can write a legally valid will in all 50 states, and the core requirements are more straightforward than the legalese suggests. To make a will, the testator (the person creating it) must:

• Be at least 18 years old, or legally emancipated.
• Be of sound mind, also called testamentary capacity.
• Sign voluntarily, without coercion or undue influence from anyone.

"Sound mind" has a specific legal meaning. At the time you sign, you generally need to understand three things: the nature and extent of your property, who your natural heirs are (the people who'd normally inherit, like a spouse and children), and the effect of signing the document. You don't need a perfect memory. You need to understand what you're doing.

Then there's witnessing. Most states require at least two competent adults to watch you sign and then sign the will themselves. A key rule: witnesses generally should not be beneficiaries. A witness who inherits under the will can create a conflict that some states resolve by voiding that person's gift. Pick neutral witnesses.

Many of these baselines come from the Uniform Probate Code, a model law adopted in whole or in part by about 20 states. It's why the requirements feel similar across much of the country. But similar is not identical, and the details of signing, witnessing, and notarizing vary by state. Confirm your own state's rules before you sign.

A self-proving affidavit is worth adding. This is a notarized statement, signed by you and your witnesses, that confirms the will was properly executed. It doesn't make the will more valid. It simplifies probate, because the court can accept the will without tracking down your witnesses to testify later. In many states, that one extra step saves your executor real time and hassle.

Comparing Will Types

How to Write a Will Step by Step

The process breaks into six concrete steps. Move through them in order and you'll have a document a court can enforce.

Step 1: Inventory what you own. Before you write a word, get a clear picture of your assets. List real estate, bank accounts, investment and brokerage accounts, vehicles, and valuable personal property like jewelry, art, or collections. Note approximate values and whose name is on each title or account. This inventory becomes the backbone of the will, and it also flags which assets pass outside the will (joint property, POD accounts, retirement plans).

Step 2: Choose your beneficiaries. Name the people or organizations who receive your property, using full legal names and relationships, for example, "my daughter, Jane T. Smith." Decide between specific bequests ("I leave my car to my brother") and dividing everything by percentage. Then add a residuary clause, which sweeps any leftover or unnamed assets to a chosen beneficiary. Without one, those assets can end up in probate limbo, distributed under state default rules instead of your wishes.

Step 3: Appoint an executor. Your executor shepherds the estate through probate: paying final debts and taxes, managing property during the process, and distributing assets to beneficiaries. Choose someone organized and trustworthy, and it helps to spell out the scope of the role rather than leaving it implied. Naming a backup executor is smart in case your first choice can't serve.

Step 4: Name a guardian for minor children. If you have kids under 18, this is often the whole reason you're writing a will. Name a guardian, and name a backup. Without this, a probate court appoints a guardian under your state's rules, potentially someone you would not have chosen.

Step 5: Draft and sign with the right formalities. Write the document, then sign it in front of the required witnesses (usually two non-beneficiary adults). Add a notarized self-proving affidavit if your state allows it. Getting the signing formalities right is where DIY wills most often fail, so slow down here.

Step 6: Store it safely and tell people where it is. A perfectly drafted will helps no one if your executor can't find it. Keep the signed original somewhere secure and accessible, and tell your executor and family where it lives. In 2026, more plans also include digital asset instructions, covering online accounts, crypto, and password access, so your executor isn't locked out of your digital life.

The Risks of a Do-It-Yourself Will

A DIY will fails quietly, and it fails at the worst possible moment. The document sits in a drawer looking complete for years. The problems only surface in probate, after you're gone, when your family is the one paying to untangle them in time, money, and stress.

The most common failure points are boring and avoidable:

• Improper witnessing. Too few witnesses, or a beneficiary signing as a witness, can void the will or a specific gift.
• Ambiguous language. Vague phrasing about who gets what invites disputes that a judge has to resolve.
• Missing residuary clause. Leftover assets fall to state intestacy rules, the opposite of the clarity you wanted.
• Conflicts with beneficiary designations. A will that contradicts your retirement or life insurance forms loses that fight, sometimes sending money to an ex-spouse you forgot to update.

Some situations raise the stakes considerably. Blended families, where you want to provide for both a current spouse and children from a prior relationship, are easy to get wrong with generic language. The same goes for business ownership, larger estates, and assets spread across more than one state, each of which adds legal wrinkles a template won't catch. And any plan involving minor children deserves a careful second look.

You don't need an attorney to write a will. But professional review generally reduces the chance of errors a court can void. Think of that review not as an expensive luxury but as buying two things at once: clarity for you and enforceability for the people you're leaving it to.

When to Work With a Professional and How Neptune Helps

Here's a simple test for whether guided help is worth it. If your situation includes any of the following, working with a professional usually pays for itself: complex or multi-state assets, a blended family, minor children, business interests, or a desire to fit your will into a broader financial plan. A basic will for a simple estate might genuinely be an afternoon project. The moment real complexity enters, the calculus changes.

This is where Neptune comes in. Neptune manages the full end-to-end process, pairing couples and families with experienced estate planning attorneys, CFPs, and CPAs (each with 20+ years of experience) and shepherding everything from start to finish. You're not handed a template and left to guess. You're guided through the decisions with people who do this every day.

A big part of that is helping partners align before anything gets drafted. Neptune uses guided education and structured conversations so you and your partner can talk through your wishes, get on the same page, and walk into drafting with clarity instead of question marks. Couples who plan together, grow together.

A will is one piece of a fuller estate plan. A complete plan typically coordinates several documents: your will, a healthcare directive (living will), a power of attorney, your beneficiary designations, and, where it fits, one or more trusts. Neptune coordinates all of it so the pieces work together instead of contradicting each other. That's the real value of end-to-end management.

Making a will isn't a defensive move against a bad outcome. It's an act of partnership and clarity, a way to write down your wishes for the people you love while you can do it thoughtfully and together.