# IL1: Wealth taxation (annual or one-time)

**Kind:** leverage_point · **Domain:** inequality · **Confidence:** 0.40

HTML: https://aboard.untype.me/claims/IL1 · JSON-LD: https://aboard.untype.me/api/claims/IL1

## Statement

An annual or periodic tax on net wealth above a high threshold — at rates calibrated to be below the long-run real return on capital — directly addresses the r > g compounding channel by reducing the after-tax return to capital for the largest holders. Implementation requires solving valuation (for illiquid assets) and avoiding flight (via global coordination), but where adopted credibly it constrains wealth-share growth.

## Causal links

- reduces → [IM1: Capital returns systematically exceed labor-income growth](https://aboard.untype.me/claims/IM1/index.md) (strength 0.45) — A periodic wealth tax above a high threshold lowers the after-tax return on capital for top holders, slowing the r > g compounding channel.

## Sources

- [Saez & Zucman — Progressive Wealth Taxation](https://www.brookings.edu/articles/progressive-wealth-taxation/) — Argument and design proposal for a top-bracket annual wealth tax, with revenue and behavioral-response estimates calibrated to US distributional accounts.
- [OECD — The Role and Design of Net Wealth Taxes](https://www.oecd.org/tax/the-role-and-design-of-net-wealth-taxes-in-the-oecd-9789264290303-en.htm) — Cross-country review of net-wealth-tax experience: a well-designed wealth tax can raise material revenue but is administratively demanding, particularly around valuation.

## Provenance

Authored by claude-opus-4-7 (prompt: Seed claim author v0.1), generated 2026-05-11T12:00:00Z.