Kentucky Payroll Compliance Guide 2026: Complete Employer Reference

Kentucky Payroll Overview

Kentucky payroll comes with a layer most states don’t have: local occupational taxes. Once you have handled state income tax withholding at the 4.0% flat rate, you have to figure out which city and county taxes apply to each employee based on where they work. That second layer makes Kentucky payroll more demanding than a flat-rate state like Illinois, even though the state math itself is simple.

The state income tax has been moving downward. Kentucky stood at 5% for most of the 2010s, dropped to 4.5% in 2023, and dropped again to 4.0% effective January 1, 2024. Further reductions are possible—Kentucky law ties future rate cuts to revenue performance benchmarks, so the rate may fall to 3.5% in coming years if the state budget supports it. As of 2026, 4.0% is the applicable rate.

SUI rates are reasonable by national standards, though the experienced-rate ceiling of 9.0% is on the higher end. The $11,100 wage base is lower than the national average, which limits your maximum annual SUI liability per employee even at adverse rates.

Kentucky Payroll Taxes: 2026 Rates and Wage Bases

Kentucky State Income Tax Withholding

The state income tax calculation is straightforward: withhold 4.0% of each employee’s taxable wages per pay period. Kentucky’s flat rate means you don’t need to consult brackets or apply different rates for different wage levels. Every dollar of taxable wages faces the same rate.

The Kentucky K-4 Form

Employees complete a Kentucky K-4 (Kentucky’s Withholding Certificate) when starting work, rather than using the federal W-4. The K-4 allows employees to claim a standard withholding allowance and exemptions. If an employee does not submit a K-4, withhold at the default rate with no allowances—meaning the full 4.0% applies to all taxable wages. Employees can update their K-4 at any time during the year.

Kentucky Withholding Filing Frequency

The Kentucky Department of Revenue assigns your filing frequency based on your total annual withholding:

All filings go through the Kentucky Department of Revenue’s KY OneStop Business Portal at onestop.ky.gov. Annual W-2 reconciliation on Form K-3 is due January 31. You must also submit W-2 data electronically if you have 26 or more W-2s.

Kentucky Local Occupational Taxes

This is where Kentucky payroll gets complex. Kentucky is one of only a handful of states that broadly allows local governments to levy occupational taxes (also called payroll taxes or license taxes) on wages. Over 200 Kentucky cities and counties charge these taxes. You must withhold the applicable local rate from employee wages and remit it to the local taxing authority.

Major Jurisdiction Rates

Note that Louisville and Lexington charge both the employer and the employee. The employer-side rate is separate from the employee withholding and represents a direct employer cost, not a pass-through. Budget for both when expanding into these markets.

Work Location Determines the Tax

Local occupational taxes attach to where the work is performed, not where the employee lives. An employee who lives in Oldham County but works in Louisville Metro owes the Louisville occupational tax on wages earned in Louisville. Remote work complicates this—if a Louisville-based employee works from home in Shelby County, you may owe Shelby County’s rate (if any) rather than Louisville’s rate for those hours. Consult the specific local ordinance for each jurisdiction where your employees work.

Registering with Local Tax Authorities

Each taxing jurisdiction has its own registration process, forms, and filing schedule. Louisville Metro has an online portal. Lexington-Fayette uses a separate system. For smaller cities, you may file paper returns quarterly. When opening a new location or hiring employees who will work in a new jurisdiction, identify the local tax authority and register before the first payroll in that location.

Kentucky SUI: Unemployment Insurance

Kentucky SUI is administered by the Kentucky Office of Unemployment Insurance within the Kentucky Education and Labor Cabinet. The taxable wage base in 2026 is $11,100 per employee per year—one of the lower bases in the region.

New Employer Rate and Experience Rating

New Kentucky employers pay SUI at 2.7% on the first $11,100 of wages per employee, capping new-employer SUI cost at $299.70 per employee per year. After accumulating a claim history (typically three years), Kentucky assigns an experience-based rate. The range runs from 0.3% to 9.0%. At the maximum rate and wage base, SUI tops out at $999 per employee per year—significant if you employ many workers.

Your rate reflects your reserve account: the balance of SUI taxes you have paid in minus unemployment benefits charged to your account. Kentucky uses a benefit ratio formula. Employers with clean claim histories work their way toward the minimum. Heavy layoffs or seasonal employment patterns push rates higher.

Quarterly SUI Filing

File SUI returns quarterly through the Kentucky Office of Unemployment Insurance at uiclaims.ky.gov. Returns report total wages and taxable wages per employee, with payment due at filing. Deadlines follow the standard quarterly schedule: April 30, July 31, October 31, and January 31.

Wage Payment Laws and Final Paychecks

Kentucky wage payment rules appear in KRS Chapter 337 (Kentucky’s Wages and Hours Law), enforced by the Kentucky Labor Cabinet. The rules are employer-accessible and relatively straightforward.

Pay Frequency

Kentucky employers must pay wages at least semi-monthly (twice per month). The maximum gap between paydays is 18 days. Exempt salaried employees may be paid monthly. You must inform employees of their payday schedule in writing when they are hired.

Final Paycheck Deadline

Final wages are due on the next regular payday following separation. Kentucky applies the same deadline whether the employee was discharged, laid off, or resigned voluntarily.

Vacation Payout at Separation

Kentucky does not mandate payout of accrued vacation or PTO at separation. Your written policy governs. If your policy promises payout, it is enforceable as a wage claim. If your policy says accrued leave is forfeited upon resignation or termination, that forfeiture clause holds up—provided employees received clear written notice of the policy.

Overtime and FLSA

Kentucky has its own overtime law under KRS 337.285, but it largely mirrors the federal FLSA standard: overtime at 1.5× the regular rate for hours worked over 40 in a workweek. The white-collar exemption threshold follows federal FLSA: $684 per week ($35,568 annually) for bona fide executive, administrative, and professional employees.

Kentucky adds one nuance: the state law covers some employees who fall outside federal FLSA coverage, particularly certain agricultural workers and small employers that the FLSA exempts. If you employ any workers who might fall into a federal FLSA gap, the Kentucky state overtime law may still apply to them.

Kentucky Minimum Wage 2026

Kentucky minimum wage is $7.25 per hour, matching the federal floor. Like Kansas, Kentucky state law ties the state minimum to the federal rate. Local governments in Kentucky have no authority to set higher local minimum wages.

Tipped Employees

The tipped employee minimum wage in Kentucky is $2.13 per hour in direct wages, with the employer applying a tip credit of up to $5.12 per hour. Tips must bring the total to at least $7.25. If they don’t, the employer makes up the shortfall. Kentucky law follows the federal tip credit structure.

New Employer Registration

New Kentucky employers register with three state agencies before the first payroll: Kentucky Department of Revenue for income tax withholding, Kentucky Office of Unemployment Insurance for SUI, and any applicable local tax authorities where employees will work.

Federal EIN

Apply at irs.gov/ein before anything else. Free, immediate online issuance. You need the EIN to register with all state and local agencies.

Kentucky Withholding Registration (KDOR)

• Where: Kentucky OneStop Business Portal at onestop.ky.gov
• What you get: Kentucky Withholding Account Number, assigned deposit frequency, access to online filing
• Information needed: Federal EIN, entity type, ownership info, first date Kentucky wages paid

Kentucky SUI Registration

• Where: uiclaims.ky.gov
• Trigger: Once you pay $1,500 in wages in a quarter or employ one or more workers for 20 weeks in a year
• What you get: Kentucky UI Employer Account Number, new-employer rate of 2.7%

Local Tax Registration

For each city or county where your employees work, contact the local tax administrator directly. Louisville Metro Revenue Commission registers employers at louisvilleky.gov. Lexington-Fayette Urban County Government handles its own registration. Many smaller jurisdictions use a paper-based process. Do this before the first payroll in each new location.

New-Hire Reporting

Report new hires and rehires within 20 days of hire date to the Kentucky New Hire Reporting Center at newhire.ky.gov or by phone/fax. Required information: employee name, address, SSN, start date, and employer FEIN and name.

Required Workplace Postings

• Kentucky Wages and Hours poster (Labor Cabinet)
• Kentucky Unemployment Insurance poster
• Kentucky Workers’ Compensation coverage notice
• Federal FLSA/minimum wage poster (DOL)
• FMLA poster (DOL, for employers with 50+)
• OSHA rights poster
• EEOC notice (employers with 15+)

Kentucky Payroll Compliance Calendar 2026

Frequently Asked Questions

What is Kentucky’s state income tax rate for 2026?

Kentucky has a flat 4.0% state income tax on all taxable wages. The rate dropped from 4.5% in 2023 to 4.0% in 2024. Kentucky law allows further reductions in future years if state revenues meet defined benchmarks. As of April 2026, the rate is 4.0%.

Do Kentucky employers have to withhold local occupational taxes?

Yes—if your employees work within a Kentucky city or county that levies an occupational tax. Over 200 jurisdictions charge these taxes. Louisville Metro charges employees 2.2%; Lexington charges 2.25%. The tax applies based on where work is physically performed, not where the employee lives. Employers must register with each local tax authority separately.

What is the Kentucky SUI rate for new employers in 2026?

New employers pay 2.7% on the first $11,100 per employee per year, capping at $299.70 per employee. After three years of claim history, Kentucky assigns an experience rate between 0.3% and 9.0%.

When must Kentucky employers pay a terminated employee?

Final wages are due on the next regular payday after separation. This applies to both voluntary resignations and employer-initiated terminations. Kentucky does not require same-day or accelerated payment on discharge.

What is the minimum wage in Kentucky for 2026?

Kentucky minimum wage is $7.25 per hour, equal to the federal floor. Tipped employees can be paid $2.13 per hour in direct wages if tips bring the total to at least $7.25. No Kentucky city or county sets a higher local minimum.

Does Kentucky have a paid family leave program?

No state paid family or medical leave program exists in Kentucky. Federal FMLA covers eligible employees at companies with 50 or more workers, providing up to 12 weeks of unpaid leave. Any paid leave comes from employer-provided PTO, short-term disability insurance, or voluntary benefits.

How do Kentucky local occupational taxes work for employees who work in multiple locations?

Allocate wages to each location where the employee actually performs work, then apply that jurisdiction’s rate to the wages earned there. If an employee splits time between Louisville and a location outside Louisville Metro, withhold 2.2% only on the Louisville wages. Remote work adds complexity—check the specific local ordinance to determine how telecommuting wages are treated in each jurisdiction.