Myth: The Left Wants to Tax Everyone at 90%
The widespread belief that crossing into a higher tax bracket means you take home less money is simply wrong. Marginal tax rates apply only to the income above each threshold — and history shows that high top rates coexisted with robust economic growth.
“"If I get a raise that puts me in a higher tax bracket, I'll actually take home less money — and high tax rates on the wealthy destroy the incentive to work, invest, and grow the economy."”
Marginal tax rates apply only to the dollars earned above each bracket threshold, not to all of your income. Getting a raise never causes your take-home pay to decrease. Meanwhile, the decades of highest top marginal rates in U.S. history — the 1950s and 1960s — also produced the fastest sustained economic growth, undermining the core claim that high rates choke the economy.
The most persistent misconception about income taxes is the 'bracket penalty' myth — the idea that crossing into a higher tax bracket causes your overall take-home pay to drop. This is factually incorrect. The U.S. uses a progressive, marginal tax system, meaning each bracket's rate applies only to the slice of income that falls within that bracket. If you earn $91,000 in 2024 and cross from the 22% into the 24% bracket (which begins at $89,075 for single filers), only the roughly $1,925 above that threshold is taxed at 24%. Every dollar you earned before that threshold continues to be taxed at its original, lower rate. A raise will always increase your net take-home pay — no exceptions.
To make this concrete with numbers: imagine two workers, one earning $88,000 and one earning $91,000 in 2024. The second worker is technically 'in the 24% bracket,' but their effective federal income tax rate on the full amount is considerably lower than 24% because the vast majority of their income was taxed at 10%, 12%, and 22%. The extra $3,000 in income does trigger some tax at 24%, but the net result is still more money in their pocket — not less. The confusion likely stems from conflating marginal rates (the rate on the last dollar earned) with effective rates (the average rate across all income), which are always lower for any taxpayer earning across more than one bracket.
American history offers a powerful counterargument to the claim that high top marginal rates destroy economic vitality. During the 1950s under President Eisenhower — a Republican — the top federal marginal income tax rate was 91%. Yet the U.S. economy grew at an average of roughly 4.1% per year in real terms during that decade. The 1960s, when the top rate was reduced to 70% under the Kennedy-Johnson tax cuts, still produced 4.4% average annual real GDP growth. These were the two fastest-growing decades in modern American economic history, occurring precisely when top rates were at their highest. This doesn't prove high rates cause growth, but it thoroughly disproves the claim that they prevent it.
Economists Peter Diamond (MIT, Nobel laureate) and Emmanuel Saez (UC Berkeley) published a landmark 2011 analysis in the Journal of Economic Perspectives estimating the revenue-maximizing top marginal income tax rate at approximately 70%. Their research accounts for behavioral responses — the degree to which high earners reduce reported taxable income in response to higher rates — and finds that the current top rate of 37% leaves substantial revenue on the table. Critically, they also found that high marginal rates can reduce economically wasteful behavior: when executives face very high rates on extracted income, they have stronger incentives to reinvest profits back into the business (which is deductible) rather than pulling cash out as personal compensation, which can actually encourage productive investment rather than discouraging it.
The 2017 Tax Cuts and Jobs Act reduced the top marginal rate from 39.6% to 37% and cut the corporate rate from 35% to 21%, at a projected ten-year cost of roughly $1.5 trillion in reduced federal revenue. Proponents predicted a surge in investment and growth that would pay for itself. The Congressional Budget Office and most independent economists found no such surge materialized — GDP growth in the years following the cuts was not meaningfully different from the pre-cut trend, and the national debt increased substantially. Warren Buffett, one of the wealthiest Americans, illustrated a related structural distortion when he noted that his effective federal tax rate of approximately 17.4% was lower than his secretary's effective rate of about 30% — because most of his income comes from capital gains, which are taxed at preferential rates far below ordinary income brackets. The marginal rate debate cannot be separated from these structural preferences that disproportionately benefit the highest earners.
A marginal tax rate applies ONLY to the income above that bracket's threshold — getting a raise never causes your take-home pay to decrease.
In 2024, the 24% bracket begins at $89,075 (single filers). If you earn $91,000, only ~$1,925 is taxed at 24% — the rest is taxed at lower rates.
The top U.S. marginal income tax rate was 91% in the 1950s under President Eisenhower. The economy grew at an average of 4.1% per year that decade.
Nobel laureate Peter Diamond and economist Emmanuel Saez calculated the revenue-maximizing top marginal rate at approximately 70% — nearly double the current 37%.
The 2017 Tax Cuts and Jobs Act cut the top rate from 39.6% to 37% at a cost of ~$1.5 trillion. Independent analyses found no measurable GDP growth improvement attributable to the cut.
Warren Buffett's effective federal tax rate (17.4%) was lower than his secretary's (~30%) because capital gains income — the primary income type for the ultra-wealthy — faces preferential rates outside the ordinary bracket system.
Sources
Clear explainer from a nonpartisan research organization on how the U.S. progressive bracket system functions, including worked numerical examples demonstrating that marginal rates apply only to income above each threshold.
Official IRS dataset documenting U.S. top marginal income tax rates going back to the inception of the federal income tax, confirming the 91% rates of the 1950s and the full history of rate changes.
Peer-reviewed analysis in the Journal of Economic Perspectives by Nobel laureate Peter Diamond and Emmanuel Saez, estimating the revenue-maximizing top marginal rate at approximately 70% after accounting for behavioral responses to taxation.
CBO analysis of the macroeconomic and fiscal impacts of the Tax Cuts and Jobs Act, finding that growth effects did not offset the law's substantial revenue cost and that GDP growth did not deviate meaningfully from pre-cut trends.
Official BEA GDP data used to calculate decade-average real growth rates, enabling direct comparison of economic performance across different top marginal rate regimes throughout U.S. history.