Kentucky has a 4.0% flat income tax rate — straightforward and lower than most neighboring states.
Kentucky Income Tax Rate for 2026
| Tax Type | Rate |
|---|---|
| Kentucky income tax | 4.0% (flat) |
Kentucky simplified its tax system in 2018, moving from progressive brackets to a single flat rate.
Kentucky Tax Calculator Examples
Example 1: $75,000 Single Filer
| Component | Calculation |
|---|---|
| Gross income | $75,000 |
| Standard deduction | -$3,160 |
| Taxable income | $71,840 |
| Kentucky tax (4.0%) | $2,874 |
| Effective rate | 3.83% |
Example 2: $150,000 Married Filing Jointly
| Component | Calculation |
|---|---|
| Gross income | $150,000 |
| Standard deduction | -$5,920 |
| Taxable income | $144,080 |
| Kentucky tax (4.0%) | $5,763 |
| Effective rate | 3.84% |
Kentucky Standard Deduction (2026)
| Filing Status | Standard Deduction |
|---|---|
| Single | $3,160 |
| Married Filing Jointly | $5,920 |
| Married Filing Separately | $2,960 |
Note: Kentucky’s standard deduction is much smaller than the federal deduction.
Kentucky Retirement Income Exclusion
Pension Exclusion
Kentucky allows an exclusion for retirement income:
| Tax Year | Exclusion Amount |
|---|---|
| 2026 | Up to $31,110 |
Qualifications:
- Must have retired under a plan requiring 5+ years of service
- Applies to pensions, 401(k), IRA distributions
- Kentucky state, local, and federal pensions qualify
Social Security
Fully exempt — Kentucky does not tax Social Security benefits.
What Income is Taxed in Kentucky?
Taxed:
- Wages and salaries
- Self-employment income
- Interest and dividends
- Capital gains (taxed as ordinary income)
- Retirement income (above exclusion)
- Rental income
Not taxed or exempt:
- Social Security — Fully exempt
- First $31,110 of qualifying pension income
- Kentucky municipal bond interest
- Railroad retirement benefits
Kentucky vs. Neighboring States
| State | Top Income Tax Rate |
|---|---|
| Kentucky | 4.0% (flat) |
| Indiana | 3.05% + local |
| Ohio | 3.5% |
| West Virginia | 5.12% |
| Tennessee | 0% (no income tax) |
| Virginia | 5.75% |
| Illinois | 4.95% (flat) |
Kentucky’s flat 4% is competitive in the region.
Local Income Taxes
Kentucky cities and counties can levy local taxes:
| Location | Local Rate |
|---|---|
| Louisville | 2.2% |
| Lexington-Fayette | 2.5% |
| Other cities | 0.5% - 2.5% |
Total rate in Louisville: 4% state + 2.2% local = 6.2%
Filing Kentucky State Taxes
| Filing Requirement | Details |
|---|---|
| Form | Form 740 |
| Due date | April 15 (with federal) |
| E-file | Yes, through KY DOR |
| Extension | Automatic if federal extension filed |
Kentucky Tax Credits
Family Size Tax Credit
Credit based on modified gross income and family size:
- Phases out at higher incomes
- Reduces tax liability
Child and Dependent Care Credit
- Based on federal credit
- Reduced by income thresholds
Kentucky Sales Tax
- State rate: 6%
- No local sales tax option
- Groceries exempt
Kentucky Property Tax
- Average effective rate: ~0.83% (below national average)
- Homestead exemption for 65+
- Relatively low compared to region
Tips to Reduce Kentucky Taxes
- Claim pension exclusion — Up to $31,110 exempt
- Consider local taxes — Louisville/Lexington add 2%+
- Max retirement contributions — 401(k), IRA reduce taxable income
- HSA contributions — Triple tax advantage
- Capital loss harvesting — Offset gains
- Itemize if beneficial — Compare to small standard deduction
Kentucky Tax Authority
Kentucky Department of Revenue
- Website: revenue.ky.gov
- Phone: 502-564-4581
- For refunds, returns, and questions
Bottom Line
Kentucky has a 4.0% flat income tax — simple and competitive regionally. The state offers a $31,110 pension income exclusion and full Social Security exemption, making it attractive for retirees. However, local income taxes in major cities like Louisville (2.2%) and Lexington (2.5%) can significantly increase effective rates. Kentucky’s small standard deduction ($3,160 single) means less up-front tax reduction.
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