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Kentucky Income Tax Calculator 2026 — Flat 4% Rate
Estimated Kentucky state income tax at common income levels, combined federal + state burden, and the full Kentucky tax bracket table — 2025 rates.
Reviewed for accuracy June 2026 by Gary Sing
State tax type
Flat 4%
State tax at $75k
$3,000
Federal tax at $75k
$8,114
Combined eff. rate $75k
14.8%
Calculate for another state:
Kentucky income tax at common income levels — 2025
Single filer, 2025 federal standard deduction ($15,000). Federal tax uses 2025 IRS brackets.
| Income | Kentucky state tax | State eff. rate | Federal tax | Total tax | Total eff. rate |
|---|---|---|---|---|---|
| $50,000 | $2,000 | 4.0% | $3,962 | $5,962 | 11.9% |
| $75,000 | $3,000 | 4.0% | $8,114 | $11,114 | 14.8% |
| $100,000 | $4,000 | 4.0% | $13,614 | $17,614 | 17.6% |
Single filer. Federal tax computed on gross income minus $15,000 standard deduction using 2025 IRS brackets. State tax estimates are approximate — consult a tax professional for exact liability. Does not include FICA (Social Security + Medicare), local taxes, or deductions beyond the standard deduction.
Kentucky state income tax rate 2025
Flat rate: 4% on all taxable income
Kentucky has a flat 4.0% income tax rate. Kentucky has been reducing its rate from 5%, with the goal of reaching 3.5% if revenue targets continue to be met.
| Income | State tax rate | Note |
|---|---|---|
| All taxable income | 4% | Applied to federal AGI |
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Kentucky income tax — frequently asked questions
Does Kentucky have a state income tax?
Yes. Kentucky has a flat 4% income tax rate that applies to all taxable income.
What is the Kentucky state income tax rate for 2025?
Kentucky has a flat 4% state income tax rate for 2025. This rate applies to all taxable income.
How much Kentucky state income tax do I owe on $75,000?
On a $75,000 gross income (single filer, 2025), estimated Kentucky state income tax is approximately $3,000 (effective rate: 4.0%). Combined with federal income tax of approximately $8,114, total tax is about $11,114 — an overall effective rate of 14.8%.
What is the combined federal and Kentucky state income tax at $100,000?
At $100,000 gross income (single filer, 2025 standard deductions): federal income tax is approximately $13,614, Kentucky state income tax is $4,000, for a combined total of approximately $17,614 — an overall effective rate of 17.6%.
How does Kentucky's income tax compare to other states?
Kentucky's top rate of 4% places it among the lower-tax states nationally. The nine states with no income tax pay $0 in state income tax; the highest-tax states (California at 13.3%, Hawaii at 11%) have the largest state income tax burdens.