Estate planning basics: what a will controls, what passes outside probate, and when the federal estate tax starts

Estate planning is the set of documents and choices that decide who controls your affairs while you live, who receives your assets at death, and which instrument governs each one. Estate planning has a reputation as a tax problem. For most households it isn’t. The tax part is real but small — a federal estate tax return is not even required until the estate plus lifetime taxable gifts exceed $15,000,000 for a 2026 death, and the Congressional Research Service reported that taxable estates were about 0.07% of deaths in 2019. The part of estate planning that touches nearly everyone is simpler and more immediate: deciding who decides, who gets what, and which document actually controls each asset. That framing is the whole subject, and the rest of this article is the mechanics.

What are the core estate-planning documents?

Four documents do most of the work in every state, with a fifth optional:

• A will. Distributes the property it covers at death, names the person (the executor, or personal representative) who administers the estate, and nominates a guardian for minor children where needed.
• A durable power of attorney for finances. Lets someone you name handle money matters if you cannot. It is “durable” because it survives your incapacity — and it ends at death.
• A health care proxy and a living will (advance directive). Names someone to make medical decisions when you cannot, and records what care you do and don’t want. These also end at death.
• A revocable living trust — optional depending on the state and the asset mix. Holds property during your life; at death the trust’s terms distribute it, and a properly funded trust can keep those assets out of the probate process.

Two points are worth slowing down on. First, the power of attorney is a while-living document; the will is a at-death document; they are not alternatives to each other. Second, the document nobody thinks about is the set of beneficiary designations on retirement accounts, life insurance, and payable-on-death accounts — which bring us to the most common surprise in this whole area.

For a closer look at what each document controls while you are alive — the healthcare documents in particular — see Wills and Advance Directives: Who Decides When You Cannot.

What does a will control — and what doesn’t it?

A will controls probate property: assets held in your sole name with no beneficiary designation and no co-owner with survivorship rights. Everything else is routed by another instrument:

• Beneficiary designation. The form on file with the plan administrator or insurer controls who receives the account. It is a contract with the custodian, not part of the will.
• Survivorship title. Joint property with right of survivorship passes to the surviving owner outside the will — though the federal estate tax and the title paperwork can still reach it, so “outside the will” is not the same as “outside the law.”
• Trust assets. Property already titled in the name of a trust follows the trust’s terms.

The practical consequence: a will cannot override a beneficiary designation. If the will says the IRA goes to one person and the IRA’s beneficiary form names someone else, the form wins. This is why an estate-plan review starts with pulling every beneficiary form, not with drafting clauses.

What happens if you die without a will?

When there’s no will, state intestacy statutes supply the defaults — who inherits, in what order, and with what spousal share. The specifics vary by state; the typical pattern is a surviving spouse and children first, then more distant relatives, with the probate court appointing an administrator when the will didn’t name anyone.

The important distinctions that survive the absence of a will:

• Property passing by beneficiary designation, survivorship title, or trust passes the same way as it would have with a will — intestacy only fills the gap for probate property.
• A will’s other functions disappear entirely: no chosen executor, no nominated guardian for minor children, and no room for a charity, a stepchild, or an unmarried partner the default list doesn’t mention.

That last point is the reason young adults with few assets often still need a will: the value is mostly in the appointments, not the property.

What is probate — and what it isn’t

Probate is the state court process that validates a will (or confirms there isn’t one), appoints the personal representative, and supervises the payment of debts and the transfer of property to heirs. It is a state-law process: procedures, court names, and timelines vary by state, and many states offer simplified or small-estate procedures for modest estates.

Two things are true at once, and conflating them causes most of the confusion about estate planning:

• Probate is a state process with its own rules, and its cost and delay vary by state.
• The federal estate tax is a separate federal system — it has its own return, its own threshold, and its own definitions, and it applies to estates whether or not probate was ever involved. The IRS’s estate-tax FAQ makes the point directly: the gross estate for federal purposes will likely include non-probate as well as probate property. Avoiding probate does not avoid the estate tax; they are different questions answered by different layers of law.

How does the federal estate tax work?

The federal estate tax is a tax on the transfer of property at death. The mechanics that matter:

• The gross estate is everything the decedent owned or held certain interests in at death, valued at fair market value — cash and securities, real estate, life insurance, business interests, trusts and annuities.
• A return is required when the gross estate, increased by the decedent’s adjusted taxable gifts and any pre-1977 specific gift tax exemption, is valued at more than the filing threshold for the year of death — $15,000,000 for a 2026 death, per the IRS’s filing-threshold table. The figure is set by statute and moves over time: the $15 million for 2026 comes from Public Law 119-21 (signed July 4, 2025), which the IRS’s gift-tax FAQ describes as raising the basic exclusion to $15,000,000 for calendar-year 2026 gifts, and CRS describes as subsequently indexed for inflation. For any other year of death, the IRS table is the authoritative list.
• Most estates file nothing. The IRS notes that most relatively simple estates — cash, publicly traded securities, small amounts of other easily valued assets, with no special deductions or elections or jointly held property — do not require a filing.
• The taxable estate is subject to a 40% rate, per the CRS overview.
• Deductions reduce the taxable estate: debts and mortgages, estate administration expenses, property passing outright to a surviving spouse (the marital deduction — it must pass outright, and the unlimited deduction requires a U.S.-citizen spouse, with a qualified domestic trust as the route for a noncitizen spouse), property left to qualifying charities, and some losses during administration.
• Lifetime gifts count against the same exclusion. The gift tax and the estate tax share one unified exclusion, so large taxable gifts made during life use up part of what would otherwise remain at death. See the gifting basics below.

The person administering the estate also has their own federal duties. Publication 559 for survivors, executors, and administrators walks through them: the personal representative notifies the IRS of the fiduciary relationship on Form 56, files the decedent’s final income tax return, files the estate’s income tax returns if required, and — before anything is distributed to heirs — makes sure the estate’s debts and taxes are settled.

What are the three gifting levers people actually use?

If an estate is anywhere near the exemption — or a family simply wants to help while it can watch — these are the mechanics that matter, per the IRS’s gift-tax FAQ:

• The annual exclusion. For 2026 it is $19,000 per recipient; if you give two children $19,000 each, the exclusion applies to each gift. Married couples can each use their own exclusion (so up to $38,000 per donee from two spouses).
• Direct tuition or medical payments to the school or provider are excluded from the taxable-gift rules entirely — no annual-exclusion arithmetic required.
• Gifts to a spouse are on the IRS’s list of gifts that are not taxable gifts (and gifts to qualifying charities are deductible).

One trap worth naming: the gifting decision interacts with the basis step-up. Inherited assets generally take a new basis at fair market value at death, while a gift carries the giver’s basis over — so a lifetime gift of appreciated property can convert a future capital gain into an immediate one. The interaction is worked through in capital gains basics; the short version is that tax-efficient gifting prefers cash and high-basis assets, and inheriting appreciated assets usually beats receiving them as gifts.

The one-hour version

If you do nothing else:

1. List the assets that would pass by designation (retirement accounts, life insurance, payable-on-death accounts) and check who is named today. Fix anything stale — an ex-spouse, a deceased parent, a minor child who generally cannot take direct control of inherited assets.
2. Check survivorship titles on the house and joint accounts, remembering that survivorship beats the will.
3. Get the four core documents in place: will, durable financial power of attorney, health care proxy and living will — plus a revocable trust if your state’s probate costs or your asset mix make it worth it, which is a state-specific question.
4. Tell the right people where the documents are. A perfect will nobody can find isn’t one.

Where does ‘varies by state’ matter most?

The federal estate and gift tax rules are uniform. Almost everything else in this picture is state law: what makes a will valid (signing formalities and witnesses), who inherits without a will, how probate runs and what it costs, whether a trust meaningfully avoids probate in that state, how community-property rules change what a married couple owns and what passes, and whether the state levies its own estate or inheritance tax with separate, lower thresholds.

The federal threshold being high is not the same as the whole tax picture being empty. Your state’s court self-help resources and your state’s tax or revenue department are the right places to check the layer that applies to you — and for estates near any threshold or with blended families or business assets, a session with an estate attorney in your state is where the state-specific answers get actual numbers.

This article explains general federal estate and gift tax mechanics and general U.S. estate-planning structure. It is not legal or tax advice, and it is not specific to your situation. State law governs most of the documents described here; consult a qualified attorney or tax professional in your state before acting.