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.
For a side-by-side comparison of every state’s income tax rates, see state income tax rates by state 2026 and best and worst states for taxes 2026. Federal income tax applies on top of state taxes — see 2026 federal income tax brackets to calculate your combined liability.
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