New on FinoLib · Volume V: Personal Finance
I have just published a new article on FinoLib, my free finance education library: Estate Tax Rate: Why It Is a Flat 40% Above the Exclusion. It is part of Volume V: Personal Finance. It is part 3 of a 3-part guide. Below is a summary of the topic in plain, expert language, so you can follow the idea even before you open the full article.
A closer look
Every legal document in this Part transfers assets; none of them transfers the judgment needed to manage those assets well. A letter of instruction — not a legal document, simply a plain explanation of where accounts are held, who to contact, and why certain decisions were made — paired with teaching heirs the fundamentals in this volume before they’re needed, is what lets a legacy outlast the person who built it. Some add an ethical will, a letter about the values behind the money. Talk in stages: an allowance teaches a child trade-offs; adult heirs need to know where the documents are and why you divided things as you did.
Accounts for children. A UTMA or UGMA custodial account is an irrevocable gift that an adult manages until the child takes control at an age set by state law; a teen with earnings can also have a custodial Roth IRA (1.7). Under the kiddie tax, a child’s unearned income above $2,700 in 2026 is taxed at the parent’s rate (children under 18, 18-year-olds whose earned income is no more than half their support, and full-time students aged 19 to 23 under the same support test).
A worked example
Worked Example — Give Now or Leave Later?
Stock worth $100,000 cost the parent $20,000. Given now, the child keeps the $20,000 basis; a sale at $100,000 taxes an $80,000 gain: $80,000 × 15% = $12,000. The gift exceeds the $19,000 annual exclusion by $81,000, so a gift tax return is due, though no tax (12.4). Left at death, the basis steps up to $100,000 (11.7: Windfalls and Inheritances: What to Do When a Large Sum Arrives) and an immediate sale owes $0. So give cash or high-basis assets while alive, and keep low-basis stock for heirs or charity.
Under the hood
Under the Hood: Why the Tax Is a Flat 40% Above the Exclusion
The rate table in 26 U.S.C. § 2001(c) tops out at “$345,800, plus 40 percent of the excess over $1,000,000.” The exclusion works as a credit equal to the tax on $15,000,000: $345,800 + 40% × ($15,000,000 − $1,000,000) = $5,945,800 in 2026. Every lower bracket sits below $1 million, so the credit absorbs them all and each dollar above the exclusion is taxed at exactly 40%. Section 2001(b) computes the tax on the taxable estate plus “adjusted taxable gifts,” less gift tax already paid, which is why taxable gifts use up the same exclusion.
Decision rule
Every adult: a durable POA, a healthcare proxy, a HIPAA authorization, and a primary and contingent beneficiary on every account and policy, reviewed within 30 days of a marriage, divorce, birth or death. If you have a minor child, sign a will naming a guardian now.
The costliest mistake
Leaving an ex-spouse on an employer plan’s beneficiary form. A divorced parent who has not remarried leaves everything to two children by will but never changes the forms on a $200,000 401(k) and a $150,000 employer group life policy. ERISA requires each plan to pay the name on file, even over a waiver in the divorce decree (Kennedy, 2009). The ex-spouse receives $200,000 + $150,000 = $350,000; the children get only the probate estate. Some courts later let an estate sue the ex-spouse to enforce the decree’s waiver, but that is slow, costly and uncertain.
Why It Matters
At these thresholds, the overwhelming majority of American households will never owe a dollar of federal estate tax. What far more households actually face: a separate annual gift exclusion of $19,000 per recipient in 2026 (rising to $38,000 for a married couple who elect to split gifts), which doesn’t touch the lifetime exemption at all and is a useful tool for moving money to family members gradually — and state-level estate or inheritance taxes, which exist in 16 states and…
Money Move
Write a one-page letter of instruction this year: every account and institution, where the will, POA and directives are kept, whom to call first, and why you chose your executor and agents. Tell the people named where it is, and update it at each annual review.
Recap
A beneficiary form, not the will, controls an IRA, a 401(k) or a life insurance policy, so an outdated form generally beats a newer will; the will governs everything else, through probate, whose cost is often put at 3%–7% of the estate as a rough rule of thumb, and which takes months.
What the full article covers
The full article includes worked examples, a look under the hood at the mechanics, a clear decision rule, the one mistake that costs people the most, a recap, a reveal-on-click quiz and the official sources behind every figure.
Volume V: Personal Finance
Read the full article on FinoLib
The complete article, Estate Tax Rate: Why It Is a Flat 40% Above the Exclusion, with every worked example, diagram, quiz and source, is free to read in Volume V, Personal Finance on finolib.com.
Explore the Finance Education Series: Vol. II — Capital Markets · Vol. I — Global Economy · Vol. III — Finance Encyclopedia · Vol. IV — Finance Careers · Vol. V — Personal Finance