California’s 2026 Billionaire Tax: Why Every Ultra-High-Net-Worth Asset Now Needs a Valuation

California’s proposed one-time 5 percent wealth tax on residents with net worth above $1 billion, measured as of December 31, 2026, would do more than increase a tax bill. It would force ultra-high-net-worth taxpayers, their advisors, and valuation professionals to defend the fair market value of every privately held asset in a net worth calculation. […]