Kentucky Payroll: Employer Tax and Software Guide

Kentucky has one of the simplest state income tax calculations in the country and one of the most fragmented local ones. I build HR software for small businesses, and if another founder asked me where Kentucky payroll gets hard, I would point past the state rate to the local fees underneath it.

This guide covers what the Commonwealth requires from employers, the local layer that state registration does not cover, and how 10 payroll providers price the work at 10, 25, and 50 employees. The state side is a flat 3.5 percent rate with no brackets, one withholding certificate, and one set of returns. That part takes an afternoon to set up.

Then you meet the occupational license fee. Roughly 170 Kentucky cities and 87 counties tax the wages earned inside their boundaries, and not one of those returns goes to the Department of Revenue. Each jurisdiction registers you separately, sets its own rate, and picks its own filing rhythm. Send a Louisville crew two days a week into a neighboring county that levies the fee, and you file with three governments that share nothing.

Kentucky also has seven reciprocity agreements, five of them with states on its border. It adds a seventh-day overtime rule that has no federal counterpart and a final paycheck deadline that runs on whichever date falls later. Put those rules together, and Kentucky stops being the easy state its flat rate suggests.

What Kentucky requires from employers

Kentucky imposes two state-level payroll obligations: income tax withholding and unemployment contributions, each run by a different agency. There is no state disability insurance, no paid family leave premium, and no statewide paid sick leave mandate, which makes the state side genuinely light compared with most of its peers.

State income tax withholding

The rate is a flat 3.5 percent of taxable income for tax year 2026, confirmed by the Kentucky Department of Revenue. House Bill 1 from the 2025 legislative session dropped it from 4.0 percent effective January 1, 2026.

A further step down to 3.0 percent for 2027 depended on revenue conditions, and the Office of State Budget Director reported that the state missed them by about $7.6 million. Its September 2026 review found the conditions unmet again, so 3.5 percent is the working number until the General Assembly says otherwise.

The calculation is short. Annualize the wages for the pay period (multiply them by the number of pay periods in a year), subtract the Kentucky standard deduction, apply 3.5 percent, then divide the result by that same number of pay periods.

The standard deduction is $3,360 for 2026, up $90 from $3,270, and the Department resets it each year under Kentucky Revised Statutes (KRS) 141.081. There are no personal exemptions and no separate schedules by filing status, so the whole state calculation fits on one line of a withholding worksheet.

The state withholding certificate is Form K-4. It is not a copy of the federal Form W-4, and it does not carry allowances. Its main job is to let an employee claim an exemption from Kentucky withholding, including the reciprocity exemption, or ask for extra withholding.

Deposit schedules and returns

The Department of Revenue (DOR) assigns filing frequency from annual Kentucky withholding liability, and the thresholds are low enough that a growing employer moves through several of them.

Form K-1 covers every period that does not end on December 31. Form K-3 covers the period ending December 31 and carries the annual reconciliation in the same document. A return is due for each period even when nothing was withheld.

Electronic filing and payment are required at every filing frequency. Only an employer the Department has granted an electronic filing waiver may send paper returns.

A 25-person Kentucky company averaging $55,000 in salary generates roughly $45,000 of annual Kentucky withholding, which lands in the monthly tier and within sight of the twice-monthly threshold. Withholding statements, meaning Forms W-2, W-2G, and the 1099 series, are due to the Department by January 31 along with Form K-5 where it applies.

Unemployment insurance contributions

Unemployment insurance is an employer-only cost in Kentucky, with nothing withheld from employees. According to the Kentucky Office of Unemployment Insurance, the taxable wage base is $12,000 per employee for 2026, up from $11,700 in 2025 and $11,400 in 2024.

The wage base is the part of each employee's yearly wages that the tax applies to. Kentucky raised it in $300 steps until it reached $12,000, the statutory ceiling in KRS 341.030, and no surcharge has been assessed since 2016.

Rate Schedule A applies for 2026, as it has every year since 2019. Where you fall on it depends on your reserve ratio, which is roughly the contributions you have paid in minus the benefits charged to your account, taken as a share of your taxable payroll.

The published rate tables in the Office of Unemployment Insurance's employer guide show Schedule A running from 0.30 percent for employers with a reserve ratio of 8.0 percent or more up to 2.40 percent at the bottom of the positive band. Once the reserve ratio turns negative, the rate jumps to 6.50 percent and tops out at 9.00 percent.

The $12,000 base sits below most states' wage bases, which caps what you can owe per employee at a level most employers can absorb.

The construction rule is the exception worth flagging. Under KRS 341.272, a new employer in the contract construction trades pays the maximum rate rather than the 2.7 percent new employer rate. That is a difference of roughly $756 per employee per year before experience rating (a rate set by the employer's own record) applies.

Pay frequency, final pay, and the seventh day

KRS 337.020 requires wages to be paid at least semimonthly, and it adds a second condition employers routinely miss: each payment must include all wages earned through a date no more than 18 days before payday. That rules out a monthly payroll, and also a semimonthly cycle with a long processing lag. An employee absent on payday must be paid within six days of asking for the wages.

Final pay follows KRS 337.055, which uses one deadline for quits and terminations alike. All wages earned are due no later than the next normal pay period following separation, or 14 days after the separation date, whichever occurs last. The later date controls. That matters most when someone leaves just before a scheduled payday, because the deadline then falls after that payday, not on it.

Minimum wage, registration, and new hire reporting

Kentucky's minimum wage is $7.25 per hour under KRS 337.275, and it has not moved since July 1, 2009. The statute lifts the state rate automatically only if the federal rate rises; the rate is not indexed to inflation, and no increase is scheduled.

Tipped employees follow the federal structure: a $2.13 cash wage plus a tip credit of up to $5.12, the share of the minimum wage that tips can cover, with the employer making up any shortfall.

Registration runs through two agencies. The Department of Revenue issues the withholding account number and sets filing frequency; the Office of Unemployment Insurance issues the employer identification number and assigns the contribution rate. Workers compensation coverage is a separate requirement, and the local occupational license accounts covered in the next section are separate again.

New hires and rehires go to the Kentucky New Hire Reporting Center within 20 days of the hire date under KRS 405.435. The new hire reporting obligation covers rehires after a break in service as well as first-time employees, and the rehires are the part seasonal employers tend to miss.

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The local layer that state registration does not cover

Kentucky local governments levy occupational license fees on wages earned inside their boundaries, and none of those returns pass through the Department of Revenue. Registering for state withholding and unemployment leaves this entire obligation untouched.

The scale is the point. A presentation delivered to a Kentucky legislative committee in October 2025 by the state's county and city associations counted roughly 170 cities and 87 counties levying the tax on payroll, with school districts adding a further layer in some areas. There is no central collector and no shared registration.

Kentucky does have a statewide standard form, Form OL-S, but it covers a business's own net profit or gross receipts return, not employer withholding. Each jurisdiction's payroll return still comes on its own form, and each jurisdiction also sets its own rate, its own filing schedule, its own thresholds, and its own penalties.

Louisville is the clearest example of how the layers stack. The 2.2 percent resident rate is not one tax but three: Louisville Metro at 1.25 percent, the Transit Authority of River City at 0.2 percent, and the School Boards Tax at 0.75 percent. Non-residents who work in Jefferson County pay 1.45 percent, the same package without the school board component.

Louisville employers file Form W-1 quarterly, and any employer that withheld more than $3,000 in any one of the preceding four quarters also owes monthly deposits due 15 days after the month ends.

Northern Kentucky shows the other pattern. Boone County charges 0.8 percent under its own ordinance, but the rate only reaches wages up to an annual cap that the county resets every year. That puts the effective burden on a senior salary well below the headline percentage.

Two more levies sit on top of the Boone County fee: a separate county mental health levy with a much lower cap of its own, and a school district levy with no cap at all. Each is calculated on gross compensation with no pre-tax deductions allowed.

Boone, Kenton, Campbell, and Scott counties are treated as multi-district regions with their own combined return forms, and under KRS 68.197 an employee who pays a city license fee takes a credit against the county fee rather than paying both in full. Pull the county's current rate sheet before you configure withholding, because the cap amounts move annually.

Seven reciprocity agreements and seven borders

Kentucky has income tax reciprocity with Illinois, Indiana, Michigan, Ohio, Virginia, West Virginia, and Wisconsin, one of the largest such networks in the country. A qualifying employee claims the exemption on Form K-4, the state withholding certificate, which authorizes the employer to stop withholding Kentucky income tax on those wages.

The reciprocity exemption now sits in a checkbox on the K-4 itself, and the Department's employer instructions point commuters to the K-4. An older stand-alone version, Form 42A809, last revised in 2007, is still posted on the Department's forms site.

Two of Kentucky's seven neighbors are outside the network. Tennessee has no wage income tax of its own, so a Tennessee resident working in Kentucky is subject to ordinary Kentucky withholding with no offsetting home-state credit worth claiming. Missouri residents are simply subject to Kentucky withholding.

For employers around Cincinnati, Evansville, Huntington, or Clarksville, the practical effect is that multi-state payroll starts at a much smaller headcount here than in the interior of the country, and the reciprocity paperwork has to be collected on day one rather than at year end.

10 payroll providers for Kentucky employers compared

Every provider below files Kentucky state withholding and unemployment contributions. What actually separates them here is the local layer: whether the platform files and pays the city and county occupational license fees where your people work, or whether it calculates the withholding and hands the filing back to you.

OnPay

OnPay has one payroll plan at $49 per month plus $6 per employee, with HR tools and time tracking sold as optional add-ons rather than tiers. Local tax filing sits in the base plan instead of behind an upgrade, and year-end W-2 and 1099 filing is included, not billed separately.

OnPay's tax filing covers all 50 states with no multi-state surcharge, which matters more in Kentucky than in most states, given how early a cross-border hire tends to arrive here.

Gusto

Gusto is a common first payroll purchase for US small businesses, with automatic tax filing, published pricing, and onboarding built into the same account. Simple runs $49 per month plus $6 per employee, after a base increase from $40 during 2025.

Gusto files and pays Kentucky local occupational license fees, Louisville's included, once you register with each jurisdiction and give it access to the account.

The single-state limit on Simple is a sharper constraint in Kentucky than the headline suggests. Seven states share a border with the Commonwealth, and seven hold reciprocity agreements with it. One hire who works from across the Ohio River, or one commuter whose home-state tax you withhold, moves you to Plus at $80 plus $12 per employee. Model that number before you sign.

Patriot Software

Patriot is the lowest-cost full-service option here at every headcount the cost table models, and it stands out in Kentucky because Full Service includes local tax filing rather than treating it as an add-on. Full Service is $37 per month plus $5 per employee and covers federal, state, and local filing, though you still file the 20-day new hire reports yourself.

Patriot Basic, for employers who file taxes themselves, is $17 per month plus $4 per employee. In a Kentucky context, filing yourself means handling K-1 returns and every local occupational return by hand.

Additional state filings cost $12 per month each, which is the figure to watch for anyone hiring across the Indiana or Ohio line.

SurePayroll

SurePayroll is owned by Paychex and aimed at very small employers and household employers. The Small Business plan is $29 per month plus $7 per employee, with a flat $9.99 monthly multi-state fee regardless of how many states are involved. That flat structure is genuinely useful for a Kentucky business with a few people across the Tennessee or Indiana line.

SurePayroll charges a separate fee in areas that require local taxes. That makes local filing an add-on rather than a standard feature, a real gap given how much of Kentucky payroll is local.

QuickBooks Workforce Payroll

QuickBooks Workforce (formerly QuickBooks Payroll) took its new name in May 2026, and the entry tier once called Core is now Workforce Payroll at $50 per month plus $7 per employee. The reason to pick it has always been the same: if your books already live in QuickBooks Online, payroll entries reach the general ledger without an export step.

Intuit's payroll disclosure says the entry tier offers no local tax payments or filings, and that certain local taxes are available only on Workforce Premium and Elite. That is the wrong place for a limit if you are a Kentucky employer with staff in more than one county.

ADP RUN

ADP says every RUN Powered by ADP package calculates, files, deposits, and reconciles payroll taxes, and that all four packages include payroll and tax filing across multiple states and local jurisdictions. In Kentucky, that coverage converts directly into value.

Hundreds of local taxing jurisdictions, each with its own rate changes and filing calendar, are exactly the kind of complexity large platforms absorb as routine and small platforms handle by asking you to file it yourself.

The cost is opacity. ADP does not publish RUN pricing: the Essential, Enhanced, Complete, and HR Pro packages are all quoted individually. ADP also says no contract is required and you can end service at any time.

Paychex Flex

Paychex competes on service rather than software, with a payroll specialist included on its top Complete package. Every payroll package (Basic, Foundations, Advanced, and Complete) is priced on request. In Kentucky, the service model earns its keep the first time a county revenue office sends a notice about a return you did not know existed.

Paylocity

Paylocity sits between small-business payroll and a full human capital management (HCM) suite, aimed at companies that have outgrown basic payroll but do not want enterprise complexity. It maintains detailed per-state tax resources including Kentucky, and the HR module covers performance, learning, and engagement alongside payroll. Pricing is quote-based, and implementation is a project rather than a signup.

Rippling

Rippling sells a unified employee record where payroll, HR, and IT provisioning share one data model. Its pricing page lists no rates, but Rippling's small-business page starts payroll plans at $8 per user per month plus a $40 monthly base fee, and its blog prices the core platform and the payroll module at $8 per employee a month each (payroll is $10 billed monthly), so a configured quote runs higher.

Rippling's blog also estimates roughly $15 to $25 per employee per month for a 100-employee company running an HR information system (HRIS), payroll, benefits administration, and time and attendance. The structural advantage in Kentucky is that HR data flows from the employee record into payroll automatically, and Rippling says it files with federal, state, and local agencies.

Justworks

Justworks sells two products under one name. Payroll is $50 per month plus $8 per employee and is straightforward software. The other is a professional employer organization (PEO) service. PEO Basic, at $79 per employee per month, is a co-employment arrangement covering compliance, HR tools, 24/7 support, and a 401(k).

Justworks PEO Plus, at $124 per employee per month, adds medical, dental, and vision administration, with coverage priced off a much larger risk pool than a small Kentucky business could form on its own.

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What each provider actually costs a Kentucky employer

The table below models published rates at three headcounts, with a column for local filing because that is the axis that separates outcomes in this state. Kentucky payroll services get compared on base fee far too often and on local coverage far too rarely.

Patriot stays cheapest at every headcount and still includes local filing, which is an unusually good combination for a Kentucky employer. SurePayroll looks competitive on base fee and then treats local filing as an add-on, and QuickBooks has the same shape of gap on its entry tier.

Paychex Flex quotes its payroll packages rather than publishing rates, so its row shows Quote. What those packages offer is local tax filing paired with a service model the budget providers do not have.

Software price is also not the whole Kentucky number. A Louisville employer with 25 people on $55,000 salaries withholds roughly $30,000 a year in occupational license fees from employees and files those returns quarterly with monthly deposits on top.

Those occupational license fees are not an employer cost, but withholding and filing them is employer work. By comparison, the gap between the cheapest and most expensive published price on this table at 25 employees is roughly $1,060 a year.

Choosing a payroll provider for Kentucky

Four questions separate providers that will work here from providers that will quietly generate notices from governments you have not registered with.

One job sits outside the payroll engine entirely: the new hire paperwork. Every Kentucky new hire needs a federal I-9 and W-4, a Kentucky Form K-4 for state withholding, local occupational enrollment where a jurisdiction requires it, and a new hire report filed within 20 days. For an employee who lives in a reciprocity state, the Kentucky form also carries the reciprocity exemption.

Before you choose

FirstHR is an onboarding and HR platform, not a payroll provider. The providers above calculate pay, move money, administer benefits, and file payroll taxes with the state and the local jurisdictions their plans cover.

If running payroll is the problem in front of you, one of them is the answer.

What we handle is the layer that feeds payroll: onboarding workflows that put Form K-4, the I-9, and the W-4 on each new hire's first-day task list, e-signatures on offer letters and acknowledgments, employee records, and HR document management for small US teams at a flat $98 a month for up to 10 people or $198 for 11 to 50.

If the recurring problem is a K-4 that never got signed, a missing reciprocity K-4 for the employee commuting in from Cincinnati, no record of which county the new field tech actually works in, and a 20-day new hire report that may or may not have gone out, that is a document collection failure rather than a payroll processing failure.

Each of those can sit on the onboarding plan as a task with a deadline. The forms themselves are completed and the report is filed outside the platform, and the completed copies are kept in the employee file.

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Frequently Asked Questions

What is the Kentucky income tax rate for payroll withholding?

A flat 3.5 percent of taxable income, down from 4.0 percent under House Bill 1 from the 2025 session. Withholding is computed by annualizing the pay period wages, subtracting the $3,360 standard deduction, applying 3.5 percent, and dividing by the number of pay periods. The state budget office found that the revenue conditions for a further cut to 3.0 percent were missed by about $7.6 million.

What is the Kentucky unemployment insurance wage base and rate range?

$12,000 per employee, up from $11,700 the prior year. Rate Schedule A applies, running 0.30 to 2.40 percent for employers with a positive reserve ratio and 6.50 to 9.00 percent for negative-reserve employers. New employers pay 2.7 percent, and new contract construction employers pay the maximum 9.0 percent under KRS 341.272. Contributions are employer-paid.

What is the Kentucky minimum wage?

$7.25 per hour under KRS 337.275, which follows any federal increase automatically and has not changed since July 1, 2009. It is not indexed and no increase is scheduled. Tipped employees receive a $2.13 cash wage with a tip credit of up to $5.12, and the state Supreme Court struck down a local minimum wage ordinance in 2016, so the floor is uniform statewide.

How often must Kentucky employers pay employees?

At least semimonthly under KRS 337.020, and each payment must cover wages earned to a day not more than 18 days before the payment date. A monthly payroll does not comply, and neither does a semimonthly cycle with a long processing lag. An employee absent on payday must be paid afterward on six days' demand, that is, within six days of asking.

When is a final paycheck due in Kentucky?

Under KRS 337.055, no later than the next normal pay period following the separation date or 14 days after it, whichever occurs last. Kentucky uses the same deadline for quits and discharges. The word is last rather than first, which changes the answer whenever someone leaves shortly before a scheduled payday.

Do Kentucky cities and counties charge a local payroll tax?

Yes. Roughly 170 cities and 87 counties levy occupational license fees on wages earned inside their boundaries, with school districts adding a layer in some areas. None of it is collected by the Department of Revenue. Each jurisdiction has its own registration, rate, forms, and filing calendar, and state registration covers none of them.

What are the Louisville Metro occupational license fee rates?

Residents who work in Jefferson County pay 2.2 percent: 1.25 percent to Louisville Metro, 0.2 percent to the Transit Authority of River City, and 0.75 percent to the School Boards Tax. Non-residents working there pay 1.45 percent. Employers file Form W-1 quarterly, plus monthly deposits if withholding exceeded $3,000 in any of the preceding four quarters.

Which states have reciprocity agreements with Kentucky?

Illinois, Indiana, Michigan, Ohio, Virginia, West Virginia, and Wisconsin. Employees claim the exemption on the state's K-4 certificate, and the employer then stops withholding Kentucky income tax. Virginia residents qualify only by commuting daily, and Ohio residents are excluded if they hold 20 percent or more equity as a shareholder-employee in an S corporation.

How often does a Kentucky employer file withholding returns?

Annually under $400 of yearly withholding, quarterly from $400 to $1,999, monthly from $2,000 to $49,999, and twice monthly at $50,000 or more. Form K-1 covers periods not ending December 31 and Form K-3 covers the December period plus the annual reconciliation. All frequencies must file and pay electronically, and $100,000 accumulated in one period must be remitted within one banking day.

Does Kentucky require overtime pay on the seventh consecutive workday?

Yes. KRS 337.050 requires time and a half for hours worked on the seventh day of a workweek, with a narrow exception where the employee is not permitted to exceed 40 hours that week, plus a short list of occupational exclusions and an exemption for supervisors. It is independent of the federal 40-hour threshold, so standard overtime logic will not produce it without configuration.

Does Kentucky have a state disability, paid leave, or sick leave program?

No. There is no state disability insurance, no paid family and medical leave premium, and no statewide paid sick leave mandate. State-level deductions on a Kentucky pay stub are income tax withholding and local occupational license fees, and that is the full list. Paid 10-minute rest periods per four hours worked are required under KRS 337.365.

How do I register a business for Kentucky payroll taxes?

The Department of Revenue issues the withholding account number and sets filing frequency. The Office of Unemployment Insurance issues the employer identification number and assigns the contribution rate. Workers compensation is separate, and each city or county where employees physically work requires its own occupational license account. New hires are reported within 20 days under KRS 405.435.

How much does payroll software cost for a Kentucky small business?

At 10 employees, published October 2026 rates run roughly $87 for Patriot Full Service, $99 for SurePayroll, $109 for OnPay or Gusto Simple, $120 for QuickBooks Workforce Payroll, and $130 for Justworks Payroll. At 50 employees the same plans land between $287 and $450. ADP RUN, Paychex Flex, and Paylocity quote individually.

What forms does a Kentucky new hire need?

Federal Form I-9 and Form W-4, plus Kentucky Form K-4, which also carries the reciprocity exemption for an employee who lives in a reciprocity state. Add a direct deposit authorization, local occupational enrollment where a jurisdiction requires it, and the new hire report within 20 days.