Flat Tax vs. Graduated Tax States: Which Saves You More? (2026)
12 states use flat income tax rates, 28 use graduated brackets. We ran the numbers at every salary level to show which system actually benefits you.
States take two approaches to income tax: flat rates (one percentage for everyone) and graduated brackets (higher rates on higher income). As of 2026, 13 states use a flat tax: Arizona (2.5%), Colorado (4.4%), Georgia (5.19%), Idaho (5.3%), Illinois (4.95%), Indiana (2.95%), Iowa (3.8%), Kentucky (3.5%), Michigan (4.25%), North Carolina (3.99%), Ohio (2.75%), Pennsylvania (3.07%), and Utah (4.65%). The remaining states with income taxes use graduated systems.
At $50,000 income, flat-tax states often look competitive. Illinois charges a flat $2,475 (4.95%). Compare that to California, where graduated brackets yield roughly $1,580 on the same income — California’s lower brackets actually protect low earners. New York charges about $2,650 at $50K. At this income level, graduated systems with low starting brackets beat most flat-tax states.
At $200,000, the picture flips dramatically. Illinois still charges 4.95% — $9,900 total. But California’s graduated brackets push the effective rate to roughly 7.8%, costing $15,600. New York hits about $12,800. Oregon charges around $17,600 at its 9.9% top rate. High earners save thousands in flat-tax states, which is exactly why flat-tax proponents advocate for them.
The distributional impact is clear: flat taxes are regressive in practice. A worker earning $35,000 in Illinois pays the same 4.95% rate as someone earning $500,000 — that’s $1,732 vs $24,750. Both rates are identical, but the burden falls much harder on the lower earner relative to their ability to pay. Graduated systems like California’s charge as little as 1% on the first $10,412, softening the blow for modest incomes.
Some states have tried to split the difference. Arizona flattened its tax from graduated brackets to a single 2.5% rate in 2023, giving high earners a massive cut while modestly reducing rates for everyone else. Georgia moved to a 5.19% flat rate in 2024. Iowa switched from graduated brackets to a flat 3.8% in 2026. Ohio flattened to 2.75% in 2026. The trend toward flat taxes has accelerated, with supporters arguing simplicity and critics arguing regressivity.
For your personal decision, the math is straightforward: if you earn under $60,000, graduated-tax states with low bottom brackets generally charge you less. If you earn over $120,000, flat-tax states almost always save you money — and the savings grow proportionally with income. Use our calculator to compare your exact tax burden across all 50 states and see which system works best for your salary.
Calculations use 2026 IRS federal tax brackets (Rev. Proc. 2025-11), state revenue department publications updated through Mar 14, 2026, and Bureau of Labor Statistics CPI-U annual averages. See our editorial standards and methodology for full sourcing.
Run this analysis on your actual salary.