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Most families will never owe a dollar of federal estate tax, which means the money lost in an inheritance is almost always lost somewhere else.

I have never received an inheritance, and estate planning is one of the few corners of finance where I have read a lot more than I have lived. Plenty of readers here will inherit money over the next two decades and plenty of others will be the ones leaving it, so the case for building a plan before anyone needs it is about as strong as it gets.

Cerulli Associates projects that $124 trillion will change hands through 2048, with roughly $105 trillion of that flowing to heirs and the rest to charity. Nearly $100 trillion of it comes from baby boomers and older generations. Not everyone believes the number: Visa’s economics team pegs the boomer-to-heir transfer at closer to $36 trillion over the next 20 years. Either estimate describes the largest handoff of assets in American history.

Almost none of it will be touched by the federal estate tax. The 2026 exemption sits at $15 million per person and $30 million for a married couple, and fewer than one estate in a thousand owes the tax at all. The Center on Budget and Policy Priorities estimates that the estates that do owe will pay an average effective rate of 14.1% in 2026, not the 40% headline rate.

Money still leaks out of inheritances, just not through the door most people are watching. It leaks through inherited retirement accounts that get taxed as ordinary income, through state estate and inheritance tax rules with thresholds as low as $1 million, through a portability election nobody filed, and through heirs who sell appreciated assets without understanding what happened to the cost basis on the date of death.

The inheritance tax rules that matter for most families are income tax rules and state tax rules wearing a different hat. Here is what applies in 2026, what to check first if you just inherited something, and what to set up if you are on the giving side of the transfer.

The Federal Numbers That Actually Matter in 2026

The One Big Beautiful Bill Act, signed in July 2025, canceled the scheduled drop to roughly $7 million and set the exemption at $15 million per person starting January 1, 2026. That amount is now permanent in the sense that it will not revert without new legislation, and it is indexed for inflation each year. The top rate on anything above it stays at 40%.

Form 706, the federal estate tax return, is required only when the gross estate plus lifetime taxable gifts crosses that $15 million line. The return is due nine months after the date of death, with an automatic six-month extension available on Form 4768. An extension to file is not an extension to pay, so interest starts running at the nine-month mark regardless.

Several other federal rules survive intact and do more day-to-day work than the exemption does. The generation-skipping transfer exemption also sits at $15 million per person and runs on a separate track from the estate exemption, which matters for anyone funding trusts for grandchildren. The annual gift exclusion holds at $19,000 per recipient for 2026, unchanged from 2025, or $38,000 for a married couple splitting gifts. Transfers to a non-citizen spouse get their own annual ceiling of $194,000.

Two of these deserve more attention than they get. The unlimited marital deduction lets you leave any amount to a U.S. citizen spouse with no transfer tax, which is why the first death in a marriage rarely produces a tax bill. Direct payments of tuition and medical bills are not gifts at all under Section 2503(e), which means a grandparent can write a $60,000 check to a university every year, on top of the $19,000 annual exclusion, and never file a gift tax return. That pairs well with a 529 plan and matters more each year, given how far college tuition has outrun inflation.

Portability Is Free Money With an Expiration Date

The deceased spousal unused exclusion, or DSUE, is the single most valuable filing most families skip. When the first spouse dies, the executor can elect to transfer that spouse’s unused exemption to the survivor, which is how a couple gets to $30 million instead of $15 million. The election only happens if someone files a Form 706.

Here is the trap. Most estates that would benefit from portability are nowhere near the $15 million filing threshold, so nobody files a return, so the DSUE evaporates. A surviving spouse with a $6 million estate today may look safe, though a business that sells or a portfolio that compounds for 25 years can change that math entirely.

The IRS built a backstop. Rev. Proc. 2022-32 lets estates that had no filing requirement make a late portability election up to five years after the date of death, as long as the return is complete and carries the required statement at the top of page one. Past five years, the only path is a private letter ruling with a real fee attached.

State-level portability is mostly a myth. Hawaii adopted it, most other estate tax states did not, which is why credit shelter trusts are still alive and well in Oregon, Massachusetts, and Minnesota.

Step-Up in Basis Is the Real Prize

For the 99.9% of families that will never owe estate tax, basis is where the planning value sits. Inherited assets generally take a new cost basis equal to fair market value on the date of death under Section 1014. Decades of appreciation on a stock position or a rental property simply disappear for capital gains purposes.

Gifting that same asset during life does the opposite. The recipient inherits the donor’s original basis, which on a house bought in 1988 might be a rounding error against today’s value. That is why holding the most appreciated assets until death, rather than giving them away, is often the better answer even for families with zero estate tax exposure.

Community property states go further. In Arizona, California, Texas, Washington, and the other community property jurisdictions, the entire community property interest gets stepped up when the first spouse dies, not just the deceased spouse’s half. A couple in a common law state gets half the benefit on the same portfolio.

The step-up has hard limits. Assets classified as income in respect of a decedent, which covers traditional IRAs, 401(k)s, 403(b)s, annuities, installment notes, and uncollected compensation, get no basis adjustment at all. That single exception is responsible for most of the tax paid on ordinary inheritances.

Inherited Retirement Accounts Are Where the Bill Shows Up

Retirement accounts are the asset that actually costs heirs money, and the rules got stricter in 2025. The SECURE Act killed the stretch IRA for most beneficiaries and replaced it with a 10-year rule: the account must be emptied by December 31 of the tenth year following the year of death, with every traditional-account dollar taxed as ordinary income on the way out.

The 2024 final regulations added a second layer that took effect for the 2025 distribution year. If the original owner died on or after their required beginning date, meaning they had already started taking their own RMDs, the beneficiary must take an annual required distribution in years one through nine and still empty the account in year ten. If the owner died before that date, there is no annual requirement, only the year-ten deadline.

The 10-year clock is not reset by any of this. Someone who inherited in 2021 still faces a 2031 deadline, not 2035. The IRS waived penalties for missed distributions from 2021 through 2024 and does not require beneficiaries to make them up, which softened the landing without extending the runway.

A narrow group of eligible designated beneficiaries escapes the 10-year deadline entirely and can still stretch distributions over a life expectancy.

• A surviving spouse who rolls the account into their own IRA follows their own schedule beginning at age 73, with no 10-year clock at all.
• A minor child of the decedent stretches until age 21, then gets 10 years from that birthday.
• A disabled or chronically ill beneficiary stretches over life expectancy for as long as that status holds.
• A beneficiary who is less than 10 years younger than the owner, often a sibling or a partner, also stretches over life expectancy.

Everyone else, which in practice means most adult children, grandchildren, nieces, nephews, and friends, is on the 10-year clock.

Roth accounts follow the same 10-year deadline, without the annual distribution requirement and without the tax bill, provided the account’s five-year clock has been satisfied. An inherited Roth is the best version of this asset by a wide margin, which is one more argument for thinking carefully about which accounts you fund and in what order while you are still alive.

The practical move for a taxable inherited IRA is bracket management. Emptying a $600,000 account in year one can push a two-earner household into the top brackets, trigger IRMAA surcharges on Medicare premiums, and phase out credits, while spreading it across ten years often keeps every dollar in the 22% or 24% band. If federal estate tax was actually paid on the estate, the beneficiary also gets an income tax deduction under Section 691(c) for the estate tax attributable to those IRD assets. Almost nobody claims it, because almost nobody knows it exists.

Business owners who inherit a plan they also administer should check the account type before anything else, since the distribution rules for a SEP IRA and a Solo 401(k) are not identical for beneficiaries.

Inheritance Tax Rules Vary by State, and That Is Where Real Bills Start

Twelve states and the District of Columbia impose their own estate tax in 2026, and the thresholds bear no relationship to the federal number. An estate worth $3 million owes nothing to the IRS while facing a six-figure bill in Oregon, Massachusetts, or Minnesota.

Thresholds verified against state revenue department sources as of August 1, 2026.

A true inheritance tax, paid by the recipient rather than the estate, exists in five states: Kentucky, Maryland, Nebraska, New Jersey, and Pennsylvania. Iowa completed its phase-out effective January 1, 2025. Rates depend on the relationship, not the size of the estate. Pennsylvania taxes transfers to children at 4.5% and to siblings at 12%, while New Jersey exempts children and grandchildren entirely and taxes unrelated beneficiaries up to 16%.

Ohio has neither tax, which makes it one of the cleaner states in the country to die in. Ohio residents still need to check the state where each heir lives and the state where any real estate sits, because both can create a filing obligation.

New York deserves its own warning. Exceed the $7.35 million exemption by more than 5% and the exemption vanishes completely, taxing the estate from the first dollar. An estate of $7.35 million owes nothing while an estate just over $7.7 million can owe hundreds of thousands. Families near that line sometimes add a charitable bequest, known as a Santa Clause, that keeps the estate under the cliff and leaves heirs with more than they would have received otherwise.

Two more state-level traps are worth knowing. New York adds gifts made within three years of death back into the taxable estate, so federal-only gifting strategies can backfire. Connecticut is the only state with its own gift tax, mirroring the federal system.

Closely Held Businesses and the Liquidity Problem

A family business creates the one scenario where estate tax genuinely threatens the asset itself. The estate owes cash within nine months while the value sits in something nobody can sell quickly, and forced sales rarely happen at fair prices. This is the situation Section 6166 was written for.

If the closely held business interest exceeds 35% of the adjusted gross estate, the executor can elect to pay the estate tax attributable to that business over as long as 14 years: five years of interest-only payments followed by ten annual installments of principal and interest. The interest rate on the first slice of deferred tax is a subsidized 2%, with the balance charged at 45% of the standard underpayment rate.

The election is easy to lose. It has to be made on a timely filed Form 706, each business interest must independently qualify before values can be aggregated to clear the 35% test, and selling too much of the business later can accelerate the entire balance. Estates that miss the threshold sometimes use a Graegin loan instead, borrowing from a third party to fund the tax with deductible interest.

Any owner in this position should know what the business is actually worth before the estate does. Getting familiar with how small businesses are valued turns an abstract estate planning conversation into a real number, and it usually changes the plan.

What to Do in the First 90 Days After Inheriting

Start with an inventory that captures date-of-death fair market value for every asset, because that figure becomes the new basis and it gets much harder to document three years later. Appraisals for real estate and closely held interests are worth the cost.

• Flag every retirement account immediately, identify whether the owner had reached their required beginning date, and calendar the year-ten deadline.
• Confirm whether a Form 706 was filed and whether portability was elected, especially when a surviving spouse is involved. The five-year clock on a late election is running.
• Check the decedent’s state of residence and any state where they owned real property for a separate filing requirement.
• Resist the urge to liquidate in year one. Selling appreciated assets right after a step-up produces almost no gain, while emptying an IRA in a single year produces the largest tax bill available.
• Hire a CPA and an estate attorney who do this work regularly. The fee is a rounding error against a mishandled IRA or a missed portability election.

Family dynamics do more damage than the tax code in most estates. Anyone thinking about buying out a sibling’s share of a house or a business should treat it as an actual transaction with documented terms, the same discipline that keeps a family loan from ending a relationship.

If You Are the One Leaving the Money

Beneficiary designations beat your will every time. The IRA form filled out in 2004 controls that account regardless of what the trust says, and a stale designation naming an ex-spouse or a deceased parent is the most common and most preventable failure in estate planning. Review every account, every policy, and every transfer-on-death registration this year.

Annual gifting still compounds. A married couple with three adult children can move $114,000 out of the estate each year using the $19,000 exclusion, with no gift tax return, plus unlimited direct payments for tuition and medical bills. Life insurance held inside an irrevocable trust keeps the death benefit out of the taxable estate entirely, since ownership rather than payment determines inclusion.

Larger or more complicated estates have a deeper toolkit, including spousal lifetime access trusts, grantor retained annuity trusts, and dynasty trusts in states with favorable rules. None of these are do-it-yourself projects, and the ones built off a template usually fail at exactly the moment they are needed.

The most valuable thing you can leave is a plan that has been explained out loud. Tell your heirs where the documents are, who the advisors are, what the beneficiary designations say, and why you structured it the way you did. Every advisor who has settled estates will tell you the same thing: the families that fight are the ones learning the plan for the first time at the funeral.

The permanent $15 million exemption has quietly changed what estate planning is for. It used to be about staying under a threshold. Now it is about basis, retirement account sequencing, state residency, and beneficiary paperwork, and those are all levers you can pull while you are alive. If you have been putting off the conversation because you assumed you were not wealthy enough for it to matter, that assumption is the expensive part. Pick a Saturday, pull up your financial freedom number, and start with the beneficiary designations.

This article is for educational purposes and is not tax, legal, or investment advice. Tax figures verified as of August 1, 2026 against IRS and state revenue department sources. Consult a CPA or estate attorney licensed in your state.