2025 Kentucky Income Tax Brackets
Kentucky (KY) levies a flat income tax rate of 4.0% for 2025. Brackets apply to taxable income after the state standard deduction.
Single Filer · 2025
Also applies to married filing separately in most states.
| Rate | Taxable income |
|---|---|
| 4.0% | $0 and up |
Married Filing Jointly · 2025
Flat rate applies to all filing statuses
| Rate | Taxable income |
|---|---|
| 4.0% | $0 and up |
Effective rate at common income levels (single)
Effective rate = total Kentucky income tax owed divided by gross income, after the state standard deduction. Federal tax and FICA are not included here.
| Gross income | Kentucky tax | Effective rate | Marginal rate |
|---|---|---|---|
| $50,000 | $1,874 | 3.7% | 4.0% |
| $75,000 | $2,874 | 3.8% | 4.0% |
| $100,000 | $3,874 | 3.9% | 4.0% |
| $150,000 | $5,874 | 3.9% | 4.0% |
| $250,000 | $9,874 | 3.9% | 4.0% |
Run a full calculation
Combine federal + Kentucky income tax and FICA into a single take-home estimate for your situation.
Open Income Tax CalculatorFrequently Asked Questions
The top Kentucky bracket is 4.0%, beginning at the first dollar of taxable income.
At $100,000 of gross income (single filer), the Kentucky effective income tax rate is approximately 3.9% — about $3,874 in state tax after the $3,160 standard deduction.
The Kentucky standard deduction for 2025 is $3,160 for single filers and $3,160 for married filing jointly.
Flat rate applies to all filing statuses in Kentucky for 2025.
Kentucky publishes annual inflation adjustments to bracket thresholds through its Department of Revenue. Rate changes typically require legislative action. Verify the latest figures against the current year instructions.
Kentucky 2025 income tax brackets from official state Department of Revenue publications, cross-checked against the Tax Foundation's State Individual Income Tax Rates and Brackets report. Effective-rate calculations use the standard deduction and progressive bracket math; itemized deductions, credits, and locality taxes are not included. Not tax advice; consult a qualified tax professional before filing.