Cycle on Jul 6, 2026

I will start by listing the topic's open threads to see if there are any specific research questions or watches we need to address or register.

I will read the existing notes to understand what has already been documented regarding these wealth tax studies, international track records, US state proposals, and valuation/avoidance mechanics.

I will search for any recent developments regarding the Washington State Millionaires' Tax (the 9.9% graduated income tax or capital gains tax litigation, or any wealth tax proposals/litigation in Washington State) to see if we have updates for our watch or if any litigation has progressed. Let's do a search.

Let's fetch the article about the court battle igniting over Washington's new income tax from the Washington State Standard or OPB to see what arguments are being made, where the lawsuit is filed, and what the current status is. This will help us update `[[washington-state-wealth-tax-study-and-constitutional-constraints]]` and potentially trigger/record events or update watches.

Let's check if there is an update on the referendum or the Supreme Court decision regarding the referendum from April 30, 2026. Let's do a search.

Let's fetch the Washington State Standard article from July 2, 2026, to see the exact details of the signatures submitted for the initiative to repeal the new income tax. This is highly relevant and very recent (just a few days ago!).

This is extremely rich information. We have a major development in Washington State: - On July 2, 2026, Let's Go Washington submitted over 500,000 signatures for Initiative Measure No. 26-645 (IP26-645) to repeal the new 9.9% income tax on high earners (the millionaires' tax). - The initiative seeks to repeal the 9.9% tax on individual and household wage income above $1 million a year, while preserving tax breaks and the expansion of a tax credit program for lower-income families built into the law. - The state Supreme Court had previously blocked a referendum attempt (on May 5, 2026, tossing the referendum petition), which forced opponents to pursue a citizen initiative instead. - Meanwhile, the constitutional litigation is also active: Rob McKenna and the Citizen Action Defense Fund filed a lawsuit in Klickitat County Superior Court on April 8, 2026, challenging the constitutionality of the tax on uniformity grounds under the 1933 *Culliton v. Chase* precedent. Let's do a search on California's 2026 Billionaire Tax Act (Initiative No. 25-0024) to see if there are any recent updates on its signature collection, certification, or campaign status. The watch says: "Voters in California will vote on Initiative No. 25-0024, the 2026 Billionaire Tax Act, which would impose a one-time 5% wealth tax on billionaires. Fire date: 2026-11-03." Let's check if there are any new articles or details.

Let's fetch the Ballotpedia page on California Proposition 40 (the One-Time Wealth Tax for State-Funded Healthcare, Education, and Food Assistance Programs Initiative, also known as the 2026 Billionaire Tax Act) to get the exact details of its qualification. This is highly relevant because it has officially qualified for the ballot and is now designated as **Proposition 40**! Let's read this.

This is incredibly comprehensive. Let's look at the facts: - California's "2026 Billionaire Tax Act" (Initiative 25-0024) has officially qualified for the November 3, 2026 ballot and is designated as **Proposition 40**. - The initiative would levy a **one-time tax of 5%** on an individual's net worth exceeding $1 billion, applying retroactively to any billionaire residing in the state as of January 1, 2026. - It is a combined initiated constitutional amendment and state statute. - The calculation is highly specific: it accounts for publicly traded securities on Dec 31, 2026, private business interests, grantor trusts, art/collectibles/IP/vehicles (with a $5 million exclusion), Roth IRAs above $10 million, property transfers after Oct 15, 2025, and dependent's assets above $50k. **Real estate and pensions are excluded.** - Revenue is deposited into a new special fund: the 2026 Billionaire Tax Reserve Fund, with 90% going to health programs (Medi-Cal) and 10% to education/food programs. - To protect the funds from being absorbed or triggering other constitutional spending requirements, the measure explicitly excludes this revenue from the General Fund for Proposition 98 school funding calculations and exempts it from the Proposition 4 (Gann Limit) spending caps. - Polling shows a tight race, with PPIC (May 2026) showing 54% support / 45% oppose, and Berkeley IGS (March 2026) showing 52% support / 33% oppose. - Campaign finance reports (through March 31, 2026) show the support committee (Save California Health Care and Public Education, backed heavily by SEIU-UHW) raising $13.6 million, while the opposition (Golden State Promise and Stop the Squeeze, backed by Chris Larsen and Ripple Labs contributing $5 million each) raising $10.4 million. - Opponents (including Gov. Gavin Newsom and various business groups/unions like the California Teachers Association) argue that the tax's retroactivity and volatility will cause capital flight, as billionaires can easily relocate to lower-tax states. Let's update the California wealth tax initiative note using its existing slug: `state-level-wealth-tax-proposals-california-2026-initiative`. Let's also check if there is any other state-level wealth tax proposal or study we can update. What about Massachusetts? Let's search for "Massachusetts wealth tax proposal 2026" or similar.

Let's check if there are any updates on the European wealth tax history or the Spanish / Norwegian / Swiss empirical records. Let's search for "Norway wealth tax capital flight 2026" or "Norway wealth tax flight Switzerland" to see if there is any new empirical data or studies published in late 2025 or 2026. This would be highly relevant to updating `[[norwegian-municipal-wealth-tax-bo-experiment-and-swiss-evidence]]` or `[[european-wealth-tax-history-and-design-lessons]]`.

Let's fetch the Reuters article from November 24, 2025: "Norway's lesson for Europe on wealth taxes: let some millionaires go" to see what the latest empirical data and perspectives are on Norway's wealth tax. This will provide great empirical evidence on capital flight and compliance from countries that tried it.

This Reuters article is incredibly valuable! It gives us concrete, recent empirical data (from late 2025) on the Norwegian wealth tax debate: - In Norway, individuals pay 1% on net wealth between 1.76 million and 20.7 million crowns ($174,000 to $2 million) and 1.1% above that (since 2022). - Approximately 671,639 people (about 12% of the population) paid the wealth tax in 2023. - Leaving Norway triggers an exit tax of 37.8% on unrealized capital gains above 3 million crowns. Loopholes allowing emigrants to defer payment indefinitely were closed in 2024. - This has caused an exodus: 261 residents with assets over 10 million crowns left in 2022, and 254 in 2023 (more than double the rate before the hike). 105 of Norway's 400 richest people now live abroad or have transferred wealth to relatives who do. - However, the tax is revenue-positive: revenue from it sits at 0.6% of GDP, which is non-trivial. - A Princeton research paper by Christine Blandhol estimates that the latest tax changes will cut Norway's output by 1.3% over the long run. - Meanwhile, France rejected a proposed 2% levy on fortunes above 100 million euros, choosing instead a narrower charge on personal assets parked in holding companies (raising barely 1 billion euros). Britain also ruled out a formal wealth tax. Let's write/update the notes. Let's start with `norwegian-municipal-wealth-tax-bo-experiment-and-swiss-evidence` and `european-wealth-tax-history-and-design-lessons`. Let's check `read_notes` again to see the exact titles and slugs of our existing notes: - `norwegian-municipal-wealth-tax-bo-experiment-and-swiss-evidence` -> We can update this note to include the latest 2025/2026 empirical evidence on Norway's national wealth tax, the exit tax, the migration numbers, and the GDP revenue contribution. - `state-level-wealth-tax-proposals-california-2026-initiative` -> We can update this note to include the qualification of Proposition 40 (the 2026 Billionaire Tax Act) on the November 3, 2026 ballot, the specific asset calculation, campaign finance, and polling. - `washington-state-wealth-tax-study-and-constitutional-constraints` -> We can update this note to include the filing of the lawsuit in Klickitat County Superior Court on April 8, 2026, and the submission of over 500,000 signatures for Initiative Measure No. 26-645 on July 2, 2026, to repeal the 9.9% millionaires' tax. Let's review the guidelines for writing notes: - ONE note per theme. - Name and link the actual thing (the story, article, paper, or page). - Carry 1-2 representative verbatim quotes, copied exactly, each kept with the link it came from. - Say what it means. - No YAML frontmatter — the title is the first `# ` heading and the slug is the slug parameter. - Use wikilinks `[[slug]]` to link other findings. Let's write/update the notes now. I will start with updating `state-level-wealth-tax-proposals-california-2026-initiative`. Let's draft the body.

Next, let's update `washington-state-wealth-tax-study-and-constitutional-constraints` to reflect the major recent developments with the 9.9% high-earner income tax (the millionaires' tax), the constitutional litigation filed in Klickitat County, and the submission of over 500,000 signatures to put the repeal measure (IP26-645) on the November ballot. Let's draft this note.

Now, let's update `norwegian-municipal-wealth-tax-bo-experiment-and-swiss-evidence` to reflect the latest empirical data from Norway's recent wealth tax hikes and the resulting capital flight/exodus, as well as the fiscal benefits (0.6% of GDP). Let's draft this note.

Let's review the watches/threads we have. We have: 1. `019f129f-447a-7687-9bb4-74fce7568470`: "Constitutional Litigation Over Washington State's 9.9% Millionaires' Tax" - Trigger: Track state court rulings on the constitutionality of the tax and whether the Washington Supreme Court overturns the 1933 Culliton v. Chase precedent. - This is an ongoing watch. We should record an event on it because the lawsuit has actually been filed (on April 8, 2026, in Klickitat County Superior Court by Rob McKenna and the CADF), starting the litigation process. Let's record this event. Let's call `record_event` on this watch.

Let's also register a new watch or update our existing watches. Let's see: we have another watch: `019f129f-37cb-7aa6-9194-0f124db2dda4` for "California Voters Decide on the 2026 Billionaire Tax Act (Initiative 25-0024)" - The title can stay. It's a one_shot watch for November 3, 2026. Since the vote hasn't happened yet, we don't resolve it. Let's register a new watch for the Washington State Initiative IP26-645 (the repeal initiative) which will also be voted on in November 2026! That is a major forward-looking dated catalyst. Let's register it.

Excellent. Let's call `finish_cycle` to complete this research cycle. I have updated the findings with high-quality, citable, and highly recent (mid-2026) evidence, recorded a significant event on our Washington litigation watch, and registered a new ballot measure watch for Washington's IP26-645. Let's finish.

I have completed the research cycle for the wealth tax topic. Here is a summary of the findings and updates made during this cycle: ### 1. California's Billionaire Tax Act Qualifies as Proposition 40 The California **2026 Billionaire Tax Act** (Initiative No. 25-0024) has officially qualified for the November 3, 2026 ballot as **Proposition 40**. * **The Design:** It proposes a retroactive, one-time 5% wealth tax on California residents with a net worth exceeding $1 billion as of January 1, 2026. Real estate and pensions are excluded from the calculation, while assets like privately held business interests, grantor trusts, and high-value Roth IRAs are included. * **The Safeguards:** To prevent the revenue from being diluted by existing constitutional mandates, the initiative establishes a dedicated "2026 Billionaire Tax Reserve Fund" (90% for healthcare/Medi-Cal, 10% for education/food assistance) that is legally exempt from Proposition 98 school funding guarantees and Proposition 4 spending limits. * **The Debate:** Governor Gavin Newsom has criticized the measure, arguing that "billionaires can, and do" move to low-tax states like Texas or Florida. However, polling shows a highly competitive race, with a May 2026 PPIC poll showing **54% support** among likely voters. * *Note updated:* `state-level-wealth-tax-proposals-california-2026-initiative` ### 2. Washington State's Millionaires' Tax Faces Lawsuits and a Repeal Ballot Initiative Washington State's newly enacted **9.9% tax on household wage earnings above $1 million** (signed on March 30, 2026) has triggered an immediate two-front counter-offensive from opponents: * **The Litigation:** On April 8, 2026, the Citizen Action Defense Fund (CADF) and former State Attorney General Rob McKenna filed a lawsuit in Klickitat County Superior Court, arguing that the tax violates the state constitution's uniformity clause under the 1933 *Culliton v. Chase* precedent. (An event was recorded on the active litigation watch). * **The Ballot Initiative (IP26-645):** On July 2, 2026, the political committee "Let's Go Washington" turned in over **500,000 signatures**—nearly double the requirement—to qualify Initiative Measure No. 26-645 for the November 2026 ballot. The initiative seeks to completely repeal the 9.9% progressive tax while preserving the targeted sales tax breaks and working family credits embedded in the original law. * *Note updated:* `washington-state-wealth-tax-study-and-constitutional-constraints` * *New watch registered:* A new dated catalyst watch has been registered for the Washington voter decision on IP26-645 on November 3, 2026. ### 3. Empirical Evidence from Norway's Wealth Tax Hikes We integrated the latest empirical data (compiled in late 2025/2026) regarding Norway's national wealth tax hikes (1% to 1.1% net wealth tax rates) and its rigorous **37.8% exit tax on unrealized capital gains**: * **The Capital Flight:** Over 500 wealthy individuals with assets exceeding 10 million crowns fled Norway in 2022 and 2023 (more than double the historical rate). Notably, 105 of Norway's 400 richest individuals now live abroad (primarily in Switzerland). * **The Fiscal Benefit:** Despite the highly publicized exodus, the tax remains highly revenue-positive, contributing **0.6% of GDP** to the national budget. * **The Economic Cost:** A Princeton working paper by Christine Blandhol estimates that the tax changes will reduce Norway's long-run aggregate output by **1.3%** and stifle early-stage venture capital. * *Note updated:* `norwegian-municipal-wealth-tax-bo-experiment-and-swiss-evidence`