The Last Tax

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The book in one paragraph

The Last Tax: How Wealth Taxes Could Technically Work (4D4 Labs Press, July 4, 2026) proposes replacing every federal tax, meaning income, payroll, corporate, capital gains, and estate taxes, with a single proportional tax on the wealth a person controls, recorded on a public ledger. Congress does not set the rate. The rate is federal spending divided by the total wealth on the ledger, about four percent a year at current levels, and it falls whenever the country gets wealthier or Congress spends less. Roughly nine in ten American households would pay less than they do today. The author, Dan Shaffer, is a data engineer, not an economist, and the book is written as an engineering document: the constraints are listed, the mechanisms are specified in ten appendices, and the places where a constraint wins are flagged rather than hidden.

The proposal in one sentence

Replace every federal tax with one proportional tax on the wealth a person controls, recorded on a public ledger and enforced through the duty of control.

The formula

Your tax = (Your wealth / Total ledger wealth) x Federal spending

At about $7 trillion of federal spending over about $175 trillion of US household wealth, that is roughly 4 percent a year. Once foreign-controlled US assets are on the ledger, the same spending works out to roughly 3 percent. The rate is a result, not a policy choice, and every household can see what a new program costs them.

Three ideas the book rests on

  1. The wealth test. Wealth is anything that can be exchanged, assessed, and separated from its controller. Skills, labor, and health are not wealth and are never taxed.
  2. The duty of control. Liability follows control, not nominal ownership. Follow the chain up through every trust, holding company, and shell until you reach a human whose control cannot be overridden. That human is on the ledger and pays. No corporation, trust, or fund ever signs the ledger.
  3. The public ledger. Registration is the strongest ownership claim the legal system recognizes. Wealth above a de minimis threshold that nobody registers can be registered by anyone who can demonstrate control and is willing to bear the duty. Hiding an asset weakens your claim to it.

The numbers

Every figure below is the book’s own (Chapters 8 and 15). Each one can be reproduced in the public calculator at thelasttax.com/calculator/, which runs the household arithmetic on any numbers.

  • A teacher earning $58,000 with $117,000 in savings pays about $4,680 a year instead of about $13,700.
  • A founder controlling $8.3 billion pays about $332 million instead of about $25 million.
  • Roughly nine in ten American households (net wealth below about $1.5 million) pay less than they do today. The crossover point is about $1.5 to $2 million of net wealth.
  • Because the employer’s half of the payroll tax disappears too, a worker gains twice: nothing comes out of the paycheck, and the employer stops paying a tax on every dollar of wages.
  • The transition takes six years: two years of infrastructure and voluntary registration, then four years of parallel operation in which nobody pays more than they do today, with off-ramps at each stage.
  • The government goes first. Federal spending goes on the same kind of ledger before any citizen is asked to register an asset.

The hard questions, in the order critics raise them

  • Constitutional? Not under current law, and the book says so. Appendix A is a full amendment text modeled on the 16th Amendment, which overturned Pollock the same way.
  • Valuation? If a bank will lend against it, it can be valued. The ledger collects the valuations lenders, insurers, and assessors already produce, with event-triggered updates and a Judgment Layer for disputes (Chapter 11).
  • Capital flight? The tax follows the wealth, not the owner’s address. Land, US businesses, and US-enforced property rights cannot emigrate (Chapter 12).
  • Privacy? Norway has published tax records since 1863. Chapter 13 covers what happened, and what did not.
  • Liquidity? Primary residence deferral up to $500,000 of home equity as a lien at Treasury plus 1 percent, payment timing options, use-value assessment for farms and operating businesses, and three-year averaging so a market crash does not spike the rate.
  • Didn’t this fail in Europe? The European wealth taxes sat on top of the existing code, carried long lists of exemptions, and followed the owner’s address, so a change of address was enough to escape them. This design replaces the code, exempts nothing, and follows the wealth where it sits. Appendix F compares the two approaches country by country.

How it differs from the wealth taxes in the news

  • It replaces the code instead of adding to it. The billionaire taxes proposed in Congress and on California’s November 3, 2026 ballot add a new tax to the existing system. This design abolishes the income, payroll, corporate, capital gains, and estate taxes and puts one tax in their place.
  • One rate on everyone’s wealth and none on anyone’s wages. There are no brackets and no exemptions, so there is nothing for anyone to plan around, and a teacher’s savings are in the base too.
  • The tax follows the wealth, not the owner. Moving abroad does not remove a person’s US assets from the ledger.
  • The ledger is the enforcement. Registration is the ownership claim; an unregistered asset above the threshold is open to a claim by anyone who can demonstrate control and is willing to bear the duty.
  • It is unconstitutional today, and says so. The amendment is written out in full.

About the author

Dan Shaffer is a data engineer and the founder of 4D4 Labs, a boutique data engineering studio in Cleveland, Ohio. Over fifteen years he has designed data pipelines, automation systems, and analytics platforms across healthcare, finance, ecommerce, and government-facing systems, work that exposed him to the machinery behind property taxation, public records, assessments, and government data workflows. Before that he managed a Domino’s Pizza in Ohio, where he learned what it feels like to work for a paycheck the tax system reaches before you do. The Last Tax began as an engineering question: if counties can track every acre of land, and banks can value every asset they lend against, why does the federal tax system pretend it cannot see wealth?

The Last Tax is his first book.

Review copies, questions, and interviews

  • Review copies. Reviewers, editors, academics, and producers can request a PDF or a print copy at contact@thelasttax.com. Say where you write or publish.
  • Questions. The author answers questions in writing, at whatever length the piece needs, and the answers may be quoted. Written questions to contact@thelasttax.com reach him directly.
  • Interviews. The author does his best thinking on paper and has a strong preference for written exchanges. Interview requests are answered with full written responses to any set of questions.
  • Corrections. Mistakes are logged as errata at thelasttax.com/errata. If you find one, please send it.

Quoting

  • Quote with attribution: Dan Shaffer, The Last Tax: How Wealth Taxes Could Technically Work (4D4 Labs Press, 2026).
  • To reprint more than a quotation, including any chapter, appendix, or table, write to contact@thelasttax.com.
  • The cover images, the author photo, and the one-page summary below may be used in coverage of the book.

Facts

Title The Last Tax
Subtitle How Wealth Taxes Could Technically Work
Author Dan Shaffer
Publisher 4D4 Labs Press, Cleveland, Ohio
Publication date July 4, 2026 (first edition)
Formats and prices Hardcover $34.99, paperback $24.99, ebook $7.99. Audiobook in production.
ISBNs Hardcover 979-8-9960017-1-2. Paperback 979-8-9960017-0-5. Ebook 979-8-9960017-2-9. Audiobook 979-8-9960017-3-6.
Library of Congress Control Number 2026911739
Length 325 pages, 6 by 9 inches. Sixteen chapters, ten appendices, chapter endnotes, bibliography. About 87,000 words.
Where to buy thelasttax.com/buy lists every store. Amazon carries all three formats; the ebook is also at Apple Books, Kobo, Barnes & Noble, Bookshop.org, and other stores. Libraries and bookstores can order either print edition by ISBN.
Read first Chapter 1 is free in full at thelasttax.com.
Calculator thelasttax.com/calculator/ estimates any household’s tax under the proposal and under today’s code.

Downloads

Contact

contact@thelasttax.com reaches the author directly.

4D4 Labs Press, Cleveland, Ohio.