Policymakers and analysts are increasingly considering adjustments to the U.S. tax system aimed at addressing wealth inequality and fiscal challenges, with some proposals targeting billionaires directly, while others focus on corporate taxation. Recent debates have highlighted a variety of approaches, including a forthcoming vote in California on a one-time 5 percent wealth tax imposed on residents with assets exceeding $1 billion, alongside proposals by some Senate Democrats advocating for taxes on unrealized capital gains of the ultra-wealthy.
Critics of wealth taxes and unrealized capital gains levies point to significant obstacles, including legal challenges and the risk that high-net-worth individuals might relocate to avoid new taxes. California’s planned wealth tax, for example, is presented as a one-time measure intended to minimize such flight risk, but many affected billionaires worry the tax might establish a precedent for recurring levies. This mobility issue, known as tax competition, complicates efforts to tax wealth effectively at the state level.
An alternative, widely discussed among experts, is raising the federal corporate income tax. Currently set at a statutory rate of 21 percent, with effective rates often much lower for many companies, analysts advocate for increasing this rate by six to nine percentage points, targeting fewer than 2 percent of corporations but capturing over 95 percent of corporate taxable income. Proponents argue this approach could generate roughly $4 trillion over a decade—equivalent to approximately 0.9 percent of GDP—especially when combined with base-broadening reforms aimed at closing loopholes.
Supporters of increasing the corporate tax contend it addresses several fiscal and political goals. Unlike wealth taxes, which are subject to significant constitutional scrutiny, the corporate tax has long-standing legal backing and is broadly progressive, impacting mainly the largest and most profitable companies. It also covers income that might escape other tax categories, including returns on equity held by foreign investors and tax-exempt entities such as university endowments and retirement funds.
Compared to other advanced economies, the United States collects substantially less in corporate taxes—approximately 2 percent of GDP less—despite hosting many of the world’s most successful public companies. A targeted corporate tax increase on the largest firms could close a considerable portion of this gap. Additionally, proposed international tax reforms aim to impose higher minimum taxes on the foreign income of U.S. multinationals, reducing incentives for offshoring and aligning the country with global efforts to curb tax competition.
Beyond revenue generation, raising the corporate tax could serve as a pro-competition measure by focusing on large dominant firms and provides a flexible mechanism to tax excess profits arising from developments such as artificial intelligence deployment or geopolitical events, without requiring policymakers to anticipate technological or market shifts.
Experts emphasize that the corporate tax’s constitutionality is well established, pre-dating the personal income tax ratification in 1913, in contrast to questions surrounding wealth taxes and unrealized gains levies. As the federal government faces growing fiscal pressures and calls for equitable taxation intensify, a measured increase in the corporate tax rate is gaining attention as a viable policy option to tax the most profitable companies effectively while circumventing some pitfalls of other proposals.