Kentucky uses a flat state income tax rate of 4% on all taxable income. The state recently transitioned from a progressive system to a flat tax, simplifying withholding calculations and reducing rates for most workers.
Kentucky Flat Tax Rate
| Taxable Income | Tax Rate |
|---|---|
| All income | 4% |
Kentucky moved to a flat 4% rate in 2024, down from the previous 5% rate. Based on Kentucky Department of Revenue guidelines.
What You'll See on Your Paystub
A Kentucky worker's paystub includes both federal income tax withholding and state deductions:
| Deduction | Rate | Notes |
|---|---|---|
| Federal Income Tax | Varies | Based on W-4 and income |
| Social Security | 6.2% | Up to $181,200 wage base |
| Medicare | 1.45% | No wage limit |
| Kentucky State Income Tax | 4% | Flat rate on all taxable income |
Kentucky Standard Deduction
Kentucky provides a standard deduction:
| Filing Status | Standard Deduction (2026) |
|---|---|
| All Filers | $3,160 |
Kentucky uses a single standard deduction amount for all filing statuses, which is lower than the federal amount. You may benefit from itemizing if you have significant deductions.
Local Occupational Taxes
Many Kentucky cities and counties levy local occupational license taxes (often called "payroll taxes"):
| Location | Local Rate | Combined Rate |
|---|---|---|
| Louisville/Jefferson County | 2.2% | 6.2% |
| Lexington/Fayette County | 2.25% | 6.25% |
| Covington | 2.5% | 6.5% |
| Bowling Green | 1.85% | 5.85% |
Kentucky's local occupational taxes are based on where you work, not where you live. Your employer withholds this tax along with state income tax.
Louisville Metro Workers
Louisville is Kentucky's largest city:
- UPS Worldport (largest automated package handling facility)
- Humana headquarters
- Ford truck plants
- Healthcare (Norton, Baptist Health)
- 2.2% local occupational tax
Lexington Workers
Lexington is the heart of the Bluegrass region:
- University of Kentucky (major employer)
- Horse industry (breeding, training, sales)
- Toyota manufacturing nearby (Georgetown)
- Healthcare systems
- 2.25% local occupational tax
Northern Kentucky Workers
Northern Kentucky is part of the Cincinnati metro area:
- Cincinnati/Northern Kentucky International Airport (CVG)
- Many residents work in Ohio
- Covington and Newport have local taxes
- Amazon Air hub at CVG
Kentucky-Ohio Border Workers
Kentucky and Ohio do not have a reciprocity agreement:
- Live in KY, work in OH: File returns in both states; KY gives credit for OH taxes paid
- Live in OH, work in KY: File returns in both states; OH gives credit for KY taxes paid
Cincinnati-area workers crossing the river should plan for filing in both states. Ohio also has local income taxes in many cities, adding complexity.
Reciprocity Agreements
Kentucky has reciprocity agreements with several states:
- Illinois: KY residents working in IL pay KY taxes only
- Indiana: KY residents working in IN pay KY taxes only
- Michigan: KY residents working in MI pay KY taxes only
- Ohio: No reciprocity—file in both states
- Virginia: KY residents working in VA pay KY taxes only
- West Virginia: KY residents working in WV pay KY taxes only
- Wisconsin: KY residents working in WI pay KY taxes only
Kentucky has reciprocity with most neighbors except Ohio. File an exemption form with your employer if you work in a reciprocity state.
Bourbon and Distillery Workers
Kentucky's bourbon industry is a unique employer:
- Jim Beam, Maker's Mark, Wild Turkey, Woodford Reserve
- Distillery workers follow standard withholding rules
- Tourism-related jobs at distillery visitor centers
- Warehousing and bottling operations
Coal Industry Workers
Eastern Kentucky has a significant coal mining heritage:
- Mining jobs have declined but remain present
- Severance taxes on coal (separate from income tax)
- Economic transition programs in coalfield counties
Retirement Income
Kentucky offers some tax benefits for retirees:
- Social Security benefits are fully exempt
- Up to $31,110 exclusion for retirement income (pension, 401k, IRA)
- Kentucky state/local government pensions may be fully exempt
- Military retirement qualifies for the exclusion
Kentucky's $31,110 retirement income exclusion helps reduce taxes for retirees. This excludion applies per person, so married couples can exclude up to $62,220.
Military Personnel
Kentucky has military presence:
- Fort Knox (Army, home of U.S. Bullion Depository)
- Fort Campbell (Army, straddles KY-TN border)
- Active duty pay taxed based on legal residence
- Military retirement qualifies for the $31,110 exclusion
Kentucky vs. Neighboring States
| State | Tax Structure | Top Rate |
|---|---|---|
| Kentucky | Flat | 4% |
| Kentucky (with local) | Flat + Local | 6%+ |
| Tennessee | None | 0% |
| Indiana | Flat | 3.05% |
| Ohio | Progressive + Local | 3.5% + local |
| West Virginia | Progressive | 5.12% |
| Virginia | Progressive | 5.75% |
Comparing Take-Home Pay
Here's how a $75,000 annual salary compares in the region:
| Location | Effective Rate | Annual State/Local Tax |
|---|---|---|
| Kentucky (Louisville) | ~6.0% | ~$4,500 |
| Kentucky (no local tax) | ~3.8% | ~$2,875 |
| Tennessee | 0% | $0 |
| Indiana | ~3.05% | ~$2,290 |
Kentucky's flat 4% state rate is competitive, but local occupational taxes in major cities significantly increase the total burden. Rural Kentucky workers without local taxes pay some of the lowest rates in the region.
Key Takeaways
- Kentucky has a flat 4% state income tax rate
- Local occupational taxes add 1.5-2.5% in most cities
- Reciprocity with IL, IN, MI, VA, WV, WI (but not Ohio)
- Social Security is fully exempt
- $31,110 retirement income exclusion per person
- Local taxes are based on work location, not residence