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

A will is one of the most important documents you'll ever create, and most people put it off for years. Not because it's expensive. Not because it's complicated. Mostly because sitting down to think about your own death is uncomfortable in a way that's easy to defer.

But here's what actually happens when you avoid it: a judge makes decisions your family should be making. Your kids might not go to the guardian you'd choose. Your assets might not reach the people you intend. And the people you leave behind face a much harder process at the worst possible time.

This guide covers exactly what a will needs to be legally valid, the five decisions you need to make before you write one, the honest trade-offs between DIY and hiring an attorney, the mistakes that invalidate wills, and what to do after it's signed.

What Makes a Will Legally Valid

The basic requirements are consistent across most states, with a few variations.

You must be of legal age. In most states, that's 18. Some states allow minors who are married or in the military to create a will.

You must be of sound mind. This is called "testamentary capacity." It means you understand what a will is, what you own, who your family members are, and what you're deciding. This is a low bar — not intelligence or wisdom, just basic awareness. If there's any concern about cognitive decline, getting a will in place sooner rather than later is important.

The will must be written. Oral wills are not valid in most states. Handwritten (holographic) wills are valid in about 25 states, but they carry more legal risk and are more easily challenged.

It must be signed. You must sign your will, or direct someone else to sign it in your presence if you're physically unable.

It must be witnessed. Almost every state requires two adult witnesses who watch you sign the will and then sign it themselves. Witnesses should not be people who stand to inherit under the will — that can complicate things.

Notarization: A will does not need to be notarized in most states to be valid. However, making your will "self-proving" — which requires a notary — simplifies the probate process significantly because the witnesses don't need to be located later to verify their signatures. It's worth the extra 20 minutes.

A few states have their own quirks. Louisiana requires a notary. Vermont requires three witnesses. If you've recently moved, make sure your will meets the requirements of your current state.

The 5 Decisions You Need to Make Before You Write Anything

Before you sit down with an attorney or open an online will tool, work through these five questions. They're the substance of your will — everything else is just paperwork.

1. Who is your executor?

The executor (called a personal representative in some states) is the person responsible for carrying out your will. They'll file it with the court, notify creditors, manage your assets during the probate process, and distribute what's left to your beneficiaries. This is a real job that takes real time — often 40–100 hours over 12–18 months.

Choose someone organized, trustworthy, and willing to do the work. Your spouse is the common choice, but consider whether they'd be emotionally and practically able to handle this immediately after losing you. A sibling, close friend, or adult child can also serve. Name a backup in case your first choice is unable or unwilling to serve.

2. Who is the guardian for your minor children?

If you have kids under 18, this is the most important decision in your will. Who would raise your children if you and your co-parent both died?

Think carefully. The right person is someone who shares your values, has the energy and willingness to take on the responsibility, and ideally has a relationship with your kids. Geographic location matters — uprooting children across the country adds trauma on top of trauma. Financial capacity matters too — you can address this with life insurance, but it's worth discussing with whoever you choose.

Naming a guardian in your will doesn't guarantee a court will honor it, but courts give it significant weight. Without a named guardian, the decision belongs entirely to a judge.

3. Who are your beneficiaries?

Your beneficiaries are the people or organizations who receive your assets. Be specific. "My children equally" sounds clear but can create complications — what if one predeceases you? What if a child has special needs and direct inheritance would affect their government benefits?

Name primary and contingent beneficiaries. Decide whether beneficiaries receive their share outright or in trust (a trust within your will, called a testamentary trust, is common when minor children are involved — it keeps assets managed until kids reach an age you specify, like 25 instead of 18).

4. Are there specific bequests you want to make?

Specific bequests are gifts of particular items — your grandmother's ring to your daughter, your car to your son, a cash amount to a charity. If these matter to you, list them explicitly. Items with emotional value but no clear intended recipient are common sources of family conflict after a death.

Be thoughtful about physical items. If you leave your house to three children jointly, they all have to agree on what to do with it — sell, rent, or one buys out the others. Leaving specific items to specific people tends to work better than leaving everything jointly.

5. What happens to the rest?

The "residuary estate" is everything that isn't specifically bequeathed — the remainder after debts, taxes, expenses, and specific bequests are handled. Most wills leave the residuary estate to a spouse, or divided among children. Name a contingent beneficiary for the residuary estate as well, in case your primary beneficiary predeceases you.

DIY vs. Hiring an Attorney

Both paths can produce a valid will. The question is which is right for your situation.

DIY tools (LegalZoom, Trust & Will, and similar services) work well if your situation is straightforward: you're married with kids, your assets are mostly in your own name, and you want a simple distribution plan. Expect to pay $100–$400 for a basic will package. These tools walk you through the five decisions above, generate a legally formatted document, and give you clear instructions for signing and witnessing it correctly.

The risks: DIY tools are only as good as the information you put in. They're not lawyers and don't give advice. A common DIY mistake is failing to properly execute the will (wrong number of witnesses, witnesses who are beneficiaries, missing signatures) which can invalidate it entirely. Another risk is tax implications — if your estate is large enough that estate taxes are a concern, or you have complex assets like a business, DIY is insufficient.

An estate planning attorney is worth the cost ($500–$2,000 for a basic will package) if: you have significant assets, you have children from a prior relationship, you own a business, you have a child with special needs, your state's rules are unusual, or you just want the peace of mind of having a professional review your situation. An attorney will also notice things you might not — like the fact that your beneficiary designations on retirement accounts contradict your will.

A useful middle ground: use a DIY tool to get clear on what you want, then bring that to an attorney for a review.

Common Mistakes That Invalidate a Will

These are the errors that actually cause wills to be thrown out or successfully challenged.

Improper execution. The most common invalidating mistake. Missing witnesses, witnesses who didn't watch you sign, witnesses who are also beneficiaries, or a signature that doesn't match the one on file. Follow the signing procedure exactly.

Not updating after major life changes. A will that leaves everything to a spouse you later divorced may still be valid — but in some states, divorce automatically revokes provisions benefiting an ex-spouse. A will written before your second child was born may create a dispute about whether that child was intentionally excluded. Review and update your will after any major life change: marriage, divorce, birth, death, significant changes in assets.

Ambiguous language. "My jewelry to my daughters" sounds fine until you have three daughters and one piece of jewelry they all want. Be specific.

Failing to account for digital assets. Cryptocurrency, online businesses, and digital accounts are assets. If your will doesn't address them — including how to access them — they may be lost.

A will that contradicts beneficiary designations. Your will cannot override the beneficiary on your IRA or life insurance policy. If your will says your daughter gets everything but your ex-spouse is still listed as beneficiary on your 401(k), your ex-spouse gets the 401(k).

What Happens After the Will Is Signed

Signing the will is not the finish line — it's the beginning of keeping it current.

Store it safely. The original signed will should be in a fireproof safe at home or with your attorney. Your executor should know where it is. Keep a photocopy for reference, but make clear it's a copy.

Tell the right people. Your executor needs to know they've been named and where to find the will. You don't need to share the contents with everyone — but your executor should know their role.

Review it every 3–5 years, or immediately after: marriage or divorce, the birth or adoption of a child, the death of a named beneficiary or executor, a major change in assets, or a move to a different state.

Coordinate with your other documents. A will is one piece of an estate plan. Make sure your beneficiary designations, power of attorney, and healthcare proxy are in sync with what your will says — otherwise, you may have a well-drafted will that doesn't actually accomplish what you intended.

Getting a will in place is something you do once and update occasionally. The hardest part is making the time. Once it's done, you'll wonder what you were waiting for.