Kentucky taxes your wages, but not all income the same way
Kentucky has a state income tax. It applies to wages, salaries, and most other earned income. The tax rate varies depending on your income level — Kentucky uses a graduated system with rates ranging from 2% to 5.75%, though the exact rate you pay depends on your filing status and total income.
Not all income is taxed the same. Kentucky taxes wages and business income, but it does not tax certain types of income like Social Security benefits or some retirement distributions. If you work in Kentucky or live there, you will owe state income tax on your wages unless you fall into a specific exemption category.
The key difference from federal tax: Kentucky's brackets and rates are separate from the IRS brackets you see on your federal return. You calculate Kentucky tax independently, using Kentucky forms and Kentucky income figures.
Key Takeaways
- Kentucky taxes wage income at rates between 2% and 5.75%, depending on your total income and filing status.
- Social Security benefits and certain retirement income are not subject to Kentucky state income tax.
- You file Kentucky taxes separately from federal taxes using Form 740 or Form 740-NP, even if you use the same income figures.
- If your employer withholds Kentucky tax from your paycheck, you may receive a refund or owe more when you file, just like with federal tax.
How Kentucky income tax brackets work
Kentucky uses a progressive tax system, meaning the rate increases as your income increases. You do not pay the top rate on all your income — you pay the lower rate on the first portion, then the next rate on the next portion, and so on.
The brackets change each year. For 2024, the rates start at 2% on the first portion of taxable income and reach 5.75% on income above a certain threshold. The exact threshold depends on whether you file as single, married filing jointly, married filing separately, or head of household. The Kentucky Department of Revenue publishes updated brackets each January on their website.
Your Kentucky taxable income is not the same as your federal taxable income. Kentucky allows different deductions and has different rules for what counts as income. For example, Kentucky does not allow you to deduct federal income tax paid, but it does allow a standard deduction similar to the federal one.
What income Kentucky does and does not tax
Kentucky taxes wages, salaries, tips, and self-employment income. It also taxes interest, dividends, and capital gains. If you receive income from a business, rental property, or investment, Kentucky wants its share.
Kentucky does not tax Social Security benefits, regardless of your income level. This is one of the few states with this rule. Kentucky also does not tax certain retirement income: distributions from a traditional or Roth IRA, pension payments from a may have access to retirement plan, and distributions from a 401(k) or similar employer plan are generally not taxed by Kentucky.
Military pay is taxed by Kentucky if you are a resident, though some states exempt it. If you are stationed in Kentucky but live elsewhere, you may not owe Kentucky tax on that income. The rules depend on your residency status and where your employer is located.
Filing requirements and forms
If you lived in Kentucky on December 31 of the tax year, you are a Kentucky resident for tax purposes. Residents must file a Kentucky return if their income exceeds the filing threshold, which varies by age and filing status. For 2024, a single person under 65 with income over $2,700 must file. The threshold is higher if you are 65 or older.
You file Kentucky taxes using Form 740 (Kentucky Individual Income Tax Return) or Form 740-NP (for nonresidents and part-year residents). You can file by mail or electronically through the Kentucky Department of Revenue website. Many tax software programs include Kentucky forms and will calculate your Kentucky tax automatically if you enter the right information.
If your employer withheld Kentucky tax from your paychecks, that withholding is credited against what you owe. If too much was withheld, you receive a refund. If too little was withheld, you owe the difference when you file. You can adjust your withholding by giving your employer a new Form K-4 (Kentucky Employee's Withholding Certificate).
Nonresidents and part-year residents
If you did not live in Kentucky for the entire year, you are a part-year resident or nonresident. You still owe Kentucky tax on income you earned while you were in the state, but not on income earned elsewhere.
Nonresidents who worked in Kentucky must file Form 740-NP and report only the income earned in Kentucky. Your employer should have withheld Kentucky tax if you worked there. If you moved to Kentucky partway through the year, you file Form 740-NP for the months you were not a resident, then Form 740 for the months you were.
The calculation is more complex because you have to allocate income between Kentucky and non-Kentucky sources. If you worked for the same employer in multiple states, you may need to show how much you earned in each state. Keep pay stubs and records showing where you worked each month.
Deductions and credits available in Kentucky
Kentucky allows a standard deduction, similar to the federal standard deduction but with a different amount. For 2024, the Kentucky standard deduction for a single filer is $2,700. If you are 65 or older, the standard deduction is higher. You can use the standard deduction or itemize deductions, just as you do on your federal return.
Kentucky offers a child and dependent care credit and a property tax credit for certain low-income residents. It also allows a credit for taxes paid to other states if you worked in multiple states during the year. These credits reduce the tax you owe, dollar for dollar, rather than reducing your taxable income.
Kentucky does not allow a deduction for federal income tax paid, unlike some states. It also does not allow a deduction for state and local taxes (SALT) beyond what the federal return allows. Review the Kentucky Department of Revenue website or your tax software to see which credits and deductions explore to your situation.
What happens if you do not file or pay
If you owe Kentucky tax and do not file or pay, the Kentucky Department of Revenue can assess penalties and interest. Penalties start at 5% of the unpaid tax and can reach 25% if the failure is substantial. Interest accrues daily at a rate set by the state, currently around 8% per year, though this changes quarterly.
If you owe a significant amount, the state can place a lien on your property, garnish your wages, or intercept your federal tax refund. The state can also revoke your driver's license or professional license if you have an unpaid tax debt above a certain threshold.
If you cannot pay in full, you can request a payment plan. The Kentucky Department of Revenue offers installment agreements for taxpayers who owe but cannot pay when ready. Contact them to discuss your options before the debt grows larger.
Frequently Asked Questions
Do I have to file a Kentucky return if I only lived there part of the year?
Yes, if you earned income while living in Kentucky, you must file Form 740-NP reporting that income. You report only the income earned during the months you were a Kentucky resident. If you moved there partway through the year, you file for both the nonresident period and the resident period on the same return.
Is military income taxed by Kentucky?
Military pay is taxed by Kentucky if you are a Kentucky resident, even if you are stationed elsewhere. If you are stationed in Kentucky but claim residency in another state, the rules are more complex and depend on your home of record and where your employer is located. Contact the Kentucky Department of Revenue if your situation is unclear.
Can I deduct federal income tax from my Kentucky return?
No. Kentucky does not allow a deduction for federal income tax paid. You calculate Kentucky taxable income separately from federal taxable income, and federal tax paid does not reduce what you owe Kentucky.
What if my employer did not withhold Kentucky tax?
You still owe Kentucky tax on your wages, whether or not your employer withheld it. When you file your return, you will owe the full amount due. You can ask your employer to adjust your withholding going forward by submitting a new Form K-4, or you can make estimated tax payments to avoid a large bill at tax time.
Where do I send my Kentucky tax return?
You can file electronically through the Kentucky Department of Revenue website, which is the fastest method. If you file by mail, send your return to the address shown in the Form 740 instructions. Electronic filing typically produces a refund faster than paper filing.