Comparing a 2% Wealth Tax, the Buffett Rule, and a 15% Minimum Tax

These three tax concepts are often discussed together because they all seek to increase taxes paid by the wealthiest individuals or the largest corporations. However, they target very different things. A wealth tax targets accumulated assets, the Buffett Rule targets high-income individuals whose effective tax rates are unusually low, and the 15% minimum tax targets highly profitable corporations.

1. The 2% Wealth Tax

A wealth tax is levied annually on an individual's net worth rather than their income. Net worth generally includes stocks, bonds, business interests, real estate, and other assets minus liabilities.

Example

Net Worth: $100 million

Tax Rate: 2%

Annual Wealth Tax: $2 million

Advantages

• Raises revenue from a very small number of extremely wealthy households.
• May slow the concentration of wealth.
• Can tax large unrealized gains that might otherwise avoid taxation for years.
• Could fund public investments without raising taxes on most households.

Disadvantages

• Difficult to value private businesses and illiquid assets annually.
• Can encourage tax avoidance and relocation strategies.
• May reduce incentives for investment and entrepreneurship.
• Can require taxpayers to sell assets or borrow money even when cash flow is limited.
• May face constitutional and administrative challenges.

2. The Buffett Rule

Named after investor Warren Buffett, the Buffett Rule was proposed to ensure that wealthy taxpayers do not pay lower effective tax rates than middle-class workers simply because much of their income comes from investments rather than wages.

Under the proposal, households earning more than $1 million annually would pay a minimum effective federal tax rate of approximately 30%.

Example

Income: $10 million

Current Effective Tax Rate: 17%

Current Tax: $1.7 million

Required Under Buffett Rule: $3 million

Additional Tax Due: $1.3 million

Advantages

• Targets situations where investment income is taxed more lightly than wages.
• Generally easier to administer than a wealth tax because income is already reported.
• Addresses perceived fairness concerns without requiring annual asset valuation.
• Affects only high-income taxpayers.

Disadvantages

• Does not directly address accumulated wealth.
• Could reduce incentives to invest if capital gains become less tax-advantaged.
• Revenue potential is smaller than some wealth-tax proposals.

3. The 15% Corporate Minimum Tax

The Corporate Alternative Minimum Tax requires certain highly profitable corporations to pay at least 15% of adjusted financial statement income even if deductions and credits would otherwise reduce their liability below that level.

Example

Book Income: $10 billion

Regular Tax Liability: $1.1 billion (11%)

Minimum Required Tax: $1.5 billion (15%)

Additional Tax Due: $400 million

Advantages

• Targets corporations reporting large profits while paying relatively little tax.
• Reduces the impact of certain deductions and tax preferences.
• Can increase government revenue without directly raising the statutory corporate tax rate.

Disadvantages

• May discourage investment in certain situations.
• Creates additional compliance complexity.
• Could ultimately be passed on to workers, consumers, or shareholders in some form.

Side-by-Side Comparison

Feature	2% Wealth Tax	Buffett Rule	15% Minimum Tax
What Is Taxed?	Net Worth	Income	Corporate Profits
Who Pays?	Ultra-Wealthy Individuals	High-Income Households	Large Corporations
Annual Asset Valuation Needed?	Yes	No	No
Targets Wealth Concentration?	Directly	Indirectly	No
Main Administrative Challenge	Valuation of Assets	Defining Effective Tax Rates	Calculating Book Income
Main Goal	Reduce Wealth Concentration	Tax Fairness	Prevent Very Low Corporate Tax Rates

Economic Perspective

The wealth tax is the most aggressive approach because it taxes accumulated assets regardless of whether they produce income. The Buffett Rule is more moderate because it focuses on ensuring that very high-income households pay at least a minimum effective tax rate. The 15% corporate minimum tax operates on a separate track by targeting large corporations rather than individuals.

Many economists who oppose a wealth tax nonetheless support some version of a minimum tax because income and profits are generally easier to measure and enforce than total wealth. Conversely, advocates of a wealth tax argue that income-based approaches fail to fully address the growing concentration of wealth among a small number of households.

Bottom Line

If the policy objective is to directly reduce large fortunes, a wealth tax is the most direct mechanism. If the objective is simply to ensure that wealthy taxpayers do not pay unusually low effective tax rates, the Buffett Rule may accomplish that goal with fewer administrative difficulties. If the concern is large corporations paying very little tax despite reporting large profits, the 15% corporate minimum tax is the targeted solution.