How Much Money Would Taxing the Rich Raise?

Quick Look: Revenue from Taxing the Rich

How Much Revenue Are We Talking About?
Revenue Breakdown by Proposal
Why Estimates Vary So Much?
The Avoidance Gap: Realistic Revenue
FAQ

I’ve spent years digging into tax projections, and here’s the blunt truth: the answer depends entirely on how you tax them. The Congressional Budget Office (CBO) and the Joint Committee on Taxation (JCT) have modeled dozens of proposals. The range is enormous—from $200 billion over a decade to over $3 trillion. That’s a 15x difference. So let’s cut through the noise.

  Key takeaway: The most aggressive proposals (like a wealth tax on billionaires) could raise roughly $2.5–$3 trillion over 10 years, while moderate income tax hikes on the top 1% add about $500 billion–$1 trillion. But real-world factors like avoidance slash those numbers by 30–50%.

Revenue Breakdown by Proposal

I’ve compiled estimates from official sources like the CBO, JCT, and the Tax Foundation. Each uses a different baseline and behavioral assumptions. Here’s the cheat sheet:

Proposal	10-Year Revenue Estimate	Source / Year
Biden’s 2025 Budget (top marginal rate 39.6%, capital gains at 39.6%)	$1.2 trillion	CBO, 2024
Wealth tax of 2% on net worth >$50M, 3% >$1B (Warren-style)	$2.75 trillion	Penn Wharton Budget Model, 2021
Billionaire Minimum Income Tax (25% on unrealized gains)	$360 billion	White House OMB, 2022
Returning top rate to 39.6% (from 37%)	$250 billion	Tax Foundation, 2023
Estate tax reform (lower exemption, higher rate)	$180 billion	CBO, 2023

Notice something? The wealth tax dwarfs income tax hikes. That’s because the ultra-rich hold most of their wealth in stocks and assets, not wages. But wealth taxes are a nightmare to administer. I’ve spoken with tax attorneys who say valuation alone is a mess—how do you value a private company or art collection? The OECD estimates compliance costs for wealth taxes run 2–3% of revenue, eating into the total.

Why Estimates Vary So Much?

Three reasons, and they matter more than most people realize.

1. Behavioral Response Assumptions

When you announce a wealth tax, billionaires don’t just sit there. They hire lawyers, move assets offshore, or even renounce citizenship. The CBO’s “microsimulation” models assume a relatively low avoidance response (maybe 10% leakage). The JCT’s dynamic scoring often shows higher leakage—up to 30%. I side with the JCT here: real-world evidence from European wealth taxes shows massive capital flight. France’s wealth tax (ISF) lost about 0.3% of GDP in capital outflows annually. If you applied that to the US, the revenue would shrink by 35% over a decade.

2. Definition of “Rich”

“Tax the rich” sounds great until you define it. Top 1%? That starts at around $600,000 in income (single filer) — but many are doctors or small business owners who are asset-rich but cash-poor. Tax them too hard and you hit investment. The top 0.1% ($2.8M+ income) is where the real money sits. A wealth tax on the top 0.1% alone would raise about 60% of what a top 1% wealth tax would, because the 0.1% hold 70% of the wealth. I’ve seen models that target only billionaires—say, the 800 or so US billionaires. That raises about $400–$600 billion over 10 years, less than many expect.

3. Dynamic vs. Static Scoring

Static scoring assumes no change in behavior. Dynamic scoring accounts for reduced investment and slower growth. The Tax Foundation’s dynamic model shows that raising the top income rate to 39.6% would actually reduce GDP by 0.1%–0.2%, leading to lower tax revenue from other sources. That shaves off about 10–15% of the static estimate. So that $250 billion income tax hike becomes $215 billion in reality. Not nothing, but less.

The Avoidance Gap: Realistic Revenue

Let me walk you through a realistic scenario. Suppose we implement a wealth tax of 2% on net worth above $50 million, with a 3% surcharge above $1 billion. Static estimate: $2.75 trillion. But:

Avoidance (offshoring, valuation tricks): -30% → $1.93 trillion
Compliance and litigation costs: -5% → $1.83 trillion
Economic drag (reduced investment): -10% → $1.65 trillion
Phase-in delays and grandfathering: -5% → $1.57 trillion

So a real-world take is closer to $1.5–$1.7 trillion over 10 years. Still a lot of money—enough to fund universal pre-K for a decade or double cancer research funding. But not the $3 trillion headline.

  My take: Taxing the rich isn’t a magic money tree. But even after accounting for avoidance, the numbers are big enough to meaningfully fund public investments. The key is choosing the right mix—income tax hikes plus closing stepped-up basis loophole, plus a moderate wealth tax—to minimize avoidance while maximizing revenue.

I personally think the most underrated reform is taxing unrealized capital gains at death (closing the “step-up in basis” loophole). The CBO says that alone would raise about $120 billion a year. Combine that with a billionaire minimum tax, and you get steady, hard-to-avoid revenue. I’d rather design a system that billionaires can’t dodge than chase a big headline number.

Frequently Asked Questions

If we tax billionaires at 100% of their income, how much would we get?

Surprisingly little—about $200–$300 billion a year. Most billionaires report modest salaries (a few million) while their wealth grows tax-free. The 100% rate would mainly hit their W-2 income, not their stock gains. You’d need a wealth tax to really tap their net worth.

Could a wealth tax actually decrease total revenue by causing a recession?

That’s the extreme scenario. Moderate wealth taxes (like the one in Switzerland, which raises about 1% of GDP) haven’t caused recessions. But a high-rate wealth tax could trigger capital flight. I’ve seen estimates that a 5% wealth tax would cause a 2% GDP drop over a decade, wiping out about $400 billion in other tax revenue, making the net gain only 60% of the static number.

What about taxing corporate profits—isn’t that taxing the rich indirectly?

Partially. The Tax Policy Center finds that about 75% of the corporate tax falls on capital owners (shareholders), who are disproportionately wealthy. Raising the corporate rate from 21% to 25% would raise about $600 billion over 10 years, but it also hits middle-class retirement accounts. Not a clean solution.

Why do progressives and conservatives disagree so much on the numbers?

Progressives use static scoring and low avoidance assumptions; conservatives use dynamic scoring and high avoidance. The truth lies in the middle. I’ve read hundreds of pages of JCT reports—their “central” estimate often splits the difference. But neither side fully accounts for how the rich will adapt. For example, after France introduced the wealth tax, billionaires moved to Belgium. You can’t model that perfectly.

How does the US compare to other countries’ results?

Countries with wealth taxes (Switzerland, Norway, Spain) raise between 0.2% and 1.2% of GDP. For the US, 1% of GDP would be about $270 billion per year. The US could hit the upper end because we have a higher concentration of wealth. But enforcement would be tougher—our billionaires are more mobile. I’d expect a US wealth tax to raise about 0.6–0.8% of GDP, or $150–$200 billion annually.

This article was fact-checked against CBO, JCT, Tax Foundation, and OECD reports.