How to Write a Will in 2026: Why an Attorney Makes All the Difference

What Is a Will and Why Is Writing One So Important?

A will is a legal document that says who inherits your property, who will care for your minor children, and who will manage the process after you pass away. It does not avoid probate on its own, but it tells the probate court exactly what you want.

Without a will, state law decides everything. Property goes to relatives in a fixed order, the court appoints an administrator, and chosen partners or stepchildren may inherit nothing. Neptune covers the consequences in what happens if you die without a will.

For couples specifically, writing a will also locks in three quiet but important wins. It names a guardian for any minor children. It pairs cleanly with a trust to keep assets out of probate. And it lets the surviving spouse make decisions in months instead of years.

If you have not started yet, you are in good company. The same surveys show that just 20 percent of adults under 30 have a will. That gap is closing fast as younger couples take ownership of their estate plan.

How to Make a Will Step by Step in 2026

Here is the will writing guide most attorneys use in 2026.

Step 1: Decide what kind of will you need. Most adults need a simple will (a "last will and testament"). Couples with significant assets, minor children, blended families, or business interests usually pair the will with a trust. For a side-by-side view, see trust vs will.

Step 2: List your assets and debts. Include real estate, bank accounts, investment accounts, retirement accounts, life insurance, business interests, vehicles, and personal property of value. Note which assets already have beneficiary designations, because those usually pass outside the will.

Step 3: Choose your beneficiaries. Decide who inherits what. Be specific about cash amounts, real estate, sentimental items, and percentages of the residual estate.

Step 4: Name a guardian for minor children. This is one of the most overlooked steps. Without a named guardian, the court decides. Neptune covers this in who becomes guardian if both parents die.

Step 5: Choose your executor. Pick a primary executor and at least one backup. The executor will manage the estate through probate.

Step 6: Decide on a trust if needed. If you have minor children or assets you want managed over time, consider a testamentary trust inside the will or a separate revocable living trust. The Neptune guide on trusts for children is a good primer.

Step 7: Draft the will. You can use an estate planning attorney, an online platform, or a state-specific template. Each choice has trade-offs.

Step 8: Sign it in front of witnesses. Most states require two adult, disinterested witnesses. The will is then signed, dated, and (recommended) attached to a self-proving affidavit.

Step 9: Store the original safely. Use a fireproof safe at home, a secure law firm vault, or your state's probate registry. Tell your executor where to find it.

Step 10: Review every few years and after major life events. Marriage, divorce, a new child, a move to a new state, or the death of a beneficiary are all triggers to update.

That is essentially the full set of steps to write a will in plain language.

What Are the Witness and Notary Rules When You Write a Will?

The legal formalities are smaller than most people think, but they are unforgiving. Get them wrong, and the will may be tossed out.

A self-proving affidavit is a separate page, signed in front of a notary, in which you and your witnesses swear the will was signed properly. It is not required, but it is one of the most useful add-ons because it lets the probate court accept the will without dragging your witnesses back to testify years later.

In short, witnesses make the will valid. A self-proving affidavit makes it easy to prove later.

Should You Write Your Own Will or Use an Attorney?

This is the most common question couples ask. Both paths can produce a valid will, but the trade-offs are real.

For couples with shared assets, a home, a child on the way, or any complexity at all, an attorney-drafted plan is usually worth it. The cost of a mistake during probate or guardianship is far higher than the cost of getting it right the first time.

For a deeper view, Neptune covers the differences between core estate planning tools in trust vs will and revocable trust vs irrevocable trust.

What Are the Most Common Will Writing Mistakes to Avoid?

Even careful people make the same mistakes when how to make a will turns into "let me just knock this out tonight." The most expensive ones include:

• Using only beneficiary designations and skipping the will. Beneficiary designations cover individual accounts. They do not cover real estate, personal property, or guardianship of children.
• Failing the witness rule. The two most common errors are using a beneficiary as a witness and forgetting to sign in front of both witnesses at the same time.
• Naming only one executor with no backup.
• Forgetting to name a guardian for minor children.
• Listing specific assets without considering that they may be sold, lost, or change form before death.
• Ignoring digital assets like crypto, password vaults, and online accounts.
• Not coordinating the will with retirement accounts and life insurance. Beneficiary designations on those accounts override the will.
• Storing the only signed copy in a place no one can find.

If you have any of these gaps, the will may still be valid, but probate becomes much harder for the people you leave behind.

How Often Should You Update a Will?

A will is not a one-and-done document. Most attorneys recommend a review every three years, and an update after any major life event.

Outdated wills cause some of the most painful estate disputes, especially when an ex-spouse is still listed, a deceased beneficiary is still named, or a guardianship choice no longer fits the family.

For couples in particular, the moment you have children is the moment to write or update a will. The Neptune piece on estate planning for married couples with young children is a useful starting point.

How Neptune Helps Couples Write a Will Together

Neptune helps couples build an estate plan together with an independent, highly qualified estate planning attorney. The plan typically includes a will, a revocable living trust if appropriate, healthcare directives, financial powers of attorney, and a guardianship choice for any minor children.

The attorney’s conversations ensure the documents meet your state's witness and notary rules, and that they coordinate cleanly with retirement and insurance beneficiaries.

Neptune does not provide legal advice and is not a law firm. It facilitates structured preparation between you, your partner, and your attorney.

You can learn more on the Neptune estate planning page.

Final Thoughts

The hardest part of writing a will is starting. The actual document is shorter and simpler than most people expect, and the formalities are easy to meet with the right help. For couples, doing it together is the move. It aligns with guardianship, with inheritance, and with the people you trust to carry out your wishes.

If you and your partner want to build that plan with two qualified attorneys working for each of you, you can start on the Neptune estate planning page.