A last will and testament is a written, witnessed document that tells a probate court who should receive your property and who should raise your minor children after you die. It also lets you choose the person who will handle your estate. Without one, state law makes both decisions for you using a fixed formula that ignores friendships, charities, and family dynamics entirely. Here is how a last will and testament works from the day you sign it through the day the court closes your estate.
What a Will Decides for You
A will does three main things. It directs how your probate property is distributed, names a guardian for any children under 18, and appoints an executor (sometimes called a personal representative) to carry out your instructions.
Beneficiaries can be family members, friends, charities, or trusts. You identify each one in the document, and the clearer the identification the less room there is for later disagreement. Gifts can be specific items, dollar amounts, percentages, or the entire residue of the estate after debts and specific gifts are paid.
Naming a guardian is one of the strongest reasons young parents need a will. If the other parent cannot serve, a court will otherwise appoint someone without knowing your preferences. The judge is not technically bound by the name in your will, but courts give that choice significant weight and usually honor it unless the person you picked is clearly unfit.
The executor gathers your assets, pays your debts and taxes from the estate, and distributes what remains. They owe a legal duty to manage the estate honestly and in the beneficiaries’ interests. Executors are entitled to compensation, set by statute in some states and by the court or the will itself in others; many who serve for a close family member waive the fee.
What a Will Does Not Reach
A will only governs property that goes through probate. That means assets you own in your name alone with no built-in transfer mechanism, such as a solely titled house, personal belongings, a car, or a bank account with no beneficiary on file.
Several categories of property pass outside the will no matter what the will says:
- Retirement accounts and life insurance pay whoever is listed on the beneficiary designation form. A 401(k), IRA, or policy that still names an ex-spouse will go to that ex-spouse even if your will leaves everything to your children.
- Bank and brokerage accounts with payable-on-death or transfer-on-death instructions go directly to the named person.
- Real estate or accounts held in joint tenancy with rights of survivorship pass automatically to the surviving co-owner.
- Property held in a living trust is distributed under the trust’s terms.
Beneficiary designations win every time. Reviewing them alongside your will is essential; a will update that leaves the forms untouched will not fix the mismatch.
The law also caps how freely you can distribute even the property the will does control. In nearly every state a surviving spouse has an elective share, the right to claim a fixed portion of the estate regardless of what the will says. The traditional elective share is one-third of the probate estate.1Legal Information Institute. Elective Share Percentages and reachable assets vary by state, but the principle is consistent: you cannot cut your spouse out entirely. In the nine community property states, the rule is different: property acquired during the marriage is owned equally, and you can only give away your half.
Adult children can usually be disinherited as long as the will makes the intent clear. Accidental omissions are treated differently. If a child is born or adopted after the will is signed and the document does not account for them, many states presume the omission was unintentional and give that child an intestate share.
If you die without a valid will, intestacy laws distribute your probate assets under a fixed hierarchy: spouse and children first, then parents, then siblings, then more distant relatives, with the property escheating to the state only if no relatives can be found. Intestacy cannot name a guardian, cannot leave anything to a friend or charity, and cannot bend for estranged relationships.
What Makes a Will Legally Valid
State rules vary, but the core requirements overlap. The will must be in writing, signed by the testator, and witnessed. At least two witnesses must watch the testator sign and then add their own signatures. Witnesses serve as proof that the signing was voluntary and that the testator appeared mentally competent.
That mental-competence standard, called testamentary capacity, requires the person to understand that they are making a will, have a general sense of what they own, and recognize their close family members.2Legal Information Institute. Testamentary Capacity The bar is lower than most people assume. Someone with memory lapses, or even a dementia diagnosis, can still sign a valid will if they meet those criteria at the moment of signing.
Choose witnesses who are not named as beneficiaries. Under the Uniform Probate Code an interested witness does not invalidate the will or the gift, but stricter states void the gift to that witness while keeping the rest of the will intact. Uninvolved witnesses avoid the problem entirely.
Most states allow a self-proving affidavit, a sworn statement signed by you and your witnesses before a notary confirming that the will was properly executed. The affidavit spares your witnesses from having to appear in court after your death to verify their signatures, which speeds up probate considerably. Only a few jurisdictions do not recognize it.3Legal Information Institute. Self-Proving Will
A few alternative formats exist, but they are limited. Roughly half of states recognize holographic wills, which are handwritten entirely by the testator and signed but not witnessed; they carry legal weight where accepted but are harder to prove and often vague. A growing number of states now authorize electronic wills, and New York passed its Electronic Wills Act in late 2025 allowing wills to be signed and witnessed by live video, but this area is evolving and most states have not adopted it yet. Oral wills are permitted only in narrow situations, usually for active-duty military personnel or people facing imminent death, and even then typically must be reduced to writing quickly. For almost everyone, a properly witnessed written document is the only reliable option.
Probate: How the Will Gets Carried Out
After you die, the will enters probate, a court-supervised process for validating the document and distributing the estate.
Filing and Appointment
The executor files the original will with the probate court in the county where you lived. The court checks that it meets legal requirements, including proper signatures and witnessing. With a self-proving affidavit attached, this step moves quickly. Without one, witnesses may need to give testimony or sworn statements. Once satisfied, the court formally appoints the executor and issues Letters Testamentary, the document that proves the executor’s authority to act for the estate.4Legal Information Institute. Letters Testamentary
Administering the Estate
With Letters Testamentary in hand, the executor inventories the probate assets and their values, notifies known creditors, and publishes a notice in a local newspaper for any unknown ones. Most states give creditors a window of several months to file claims. The executor uses estate funds to pay legitimate debts, funeral expenses, and taxes.
Once obligations are settled, the executor distributes the remaining assets to beneficiaries as the will directs, then files a final accounting with the court showing everything that came in and went out. When the court approves that accounting, it issues an order closing the estate.
How Long It Takes and What It Costs
Simple, uncontested estates can wrap up in under a year. More complex estates, or those involving disputes, tax issues, or hard-to-value property, routinely take 18 months to two years. Contested wills stretch longer. Court filing fees to open probate vary but generally run a few hundred dollars.
Every state offers a simplified procedure for small estates. Thresholds range widely, from as low as $10,000 in some states to over $180,000 in others. If the estate qualifies, heirs can often use a small estate affidavit, a sworn document presented directly to banks or other institutions, to transfer assets without court supervision, cutting the process to weeks instead of months.
Changing or Revoking a Will
You can change or cancel your will at any time, as long as you still have testamentary capacity. Marriage, the birth of a child, or a significant shift in your finances are all reasons to revisit the document.
For small changes, a codicil is a separate document that amends specific provisions while leaving the rest intact. It must be signed and witnessed with the same formalities as the original. For anything more than a minor tweak, drafting a new will is cleaner. The new will should include language revoking all prior wills and codicils.
A will can also be revoked by physically destroying it with the clear intent to cancel it. Tearing it up or burning it works, but only if you did it on purpose; an accidental house fire does not revoke your will.
In almost every state, a finalized divorce automatically revokes any provisions benefiting your ex-spouse, including gifts, executor appointments, and powers of appointment. The will is read as if your ex-spouse died before you. A legal separation that does not end the marriage generally has no effect. Even so, updating the will after divorce is the right move, since it lets you actively redirect those assets rather than depending on a default rule.
When Someone Challenges a Will
A will can be challenged in court, though successful contests are uncommon. The law presumes a properly executed will is valid, and the challenger has to prove otherwise. The most common grounds are:
- Lack of testamentary capacity at the time of signing.2Legal Information Institute. Testamentary Capacity
- Undue influence, meaning someone in a position of trust pressured the testator into provisions that did not reflect their true wishes. Courts look at whether the influencer had a confidential relationship, the opportunity to exert pressure, and something to gain.
- Fraud, where the testator was deceived into signing or into including specific provisions.
- Improper execution, meaning the signing or witnessing did not meet state requirements.
Proving undue influence or fraud is difficult by design. These claims rely on circumstantial evidence, since the testator is not around to testify, and an unjust-looking distribution alone is not enough.
Some wills include a no-contest clause, which threatens to disinherit any beneficiary who challenges the will and loses. Most states enforce these clauses, though they are interpreted strictly.5Legal Information Institute. No-Contest Clause Several states carve out exceptions for challenges brought in good faith with probable cause, and a few refuse to enforce the clauses at all. They deter frivolous contests better than they deter beneficiaries with real evidence.
Cost and Storage
A simple attorney-drafted will typically costs between $300 and $500. Wills involving minor children or more complex distributions run $500 to $1,500. Estate planning packages that bundle a will with a power of attorney and healthcare directive tend to run $1,000 to $2,500. Online will-making services usually cost $50 to $300 and work best for straightforward situations. A holographic will costs nothing but paper, with the risks noted above.
The original signed will is the document that matters in probate. Copies are sometimes accepted, but a missing original creates a presumption in many states that you revoked the will on purpose. Store the original in a fireproof safe at home and make sure at least one trusted person knows where it is and how to reach it. A bank safe deposit box protects the document physically, but if you are the only person authorized to open it your executor may need a court order to retrieve it, delaying the very process the will is supposed to start. Some states let you file your will with the local court for safekeeping during your lifetime, which guarantees it will be available when needed.