Raise top 4 income tax brackets by 1 point
Increase the four highest individual income tax brackets by one percentage point each. Applies above the 24% bracket threshold.
Why this matters
Rationale
A modest rate increase confined to the top four marginal brackets affects roughly the top 5 percent of filers. The framework prefers a deeper change (45 to 50 percent top rate plus new top brackets at the 0.5, 0.1, and 0.01 percent thresholds), but this is the milder CBO option closer to the Biden-era proposals.
Counter-argument
Critics argue that even small top-rate increases reduce investment incentives and encourage income shifting to capital. The empirical literature finds the behavioral response on the intensive margin (hours worked, business formation) to be modest at this scale, though the literature on tax avoidance and income shifting is contested.
Source: CBO Options 2025-2034 (re-estimated to 2026-2035 by CRFB)