Kentucky Income Tax Guide 2026 | 3.5% Rate, SS Exempt & Calculator

Kentucky operates one of the simplest income tax systems in the United States: a single flat rate applied to all taxable income, with no brackets, no surtaxes, and no distinction between income types. For 2026, that rate is 3.5% — down from 4.0% in 2024 and 2025, 4.5% in 2023, and from a multi-bracket system that topped out at 6% before 2018. Further cuts depend on revenue conditions set in law.

What makes Kentucky stand out for retirees is its selective generosity: Social Security benefits are completely exempt from state income tax, and up to $31,110 of pension and retirement income per taxpayer (private pensions, 401(k)s and IRAs included) is excluded. Federal, Kentucky and local government pension income earned before 1998 is fully excludable above that amount. On the sales tax side, Kentucky is unusually clean — a uniform 6% state rate with no local additions, and groceries are exempt. This guide walks through every layer of Kentucky's tax picture for 2026 workers and retirees.

Kentucky's 3.5% Flat Rate: How It Works and Where It's Headed

Kentucky calculates state income tax by starting with your federal adjusted gross income (AGI) and then applying Kentucky-specific adjustments. The most important adjustment is the Kentucky standard deduction: $3,360 for 2026. Unlike the federal system, Kentucky's deduction does not change with age or blindness status.

Step-by-Step: Kentucky Tax Calculation at $100,000

The Rate Reduction Roadmap

Kentucky's income tax has been on a deliberate downward path since 2018, when the legislature collapsed a multi-bracket system (top rate: 6%) into a flat 5% rate. Since then the rate has been cut in steps set in KRS 141.020(2):

• 2018: Flat 5% (from graduated brackets)
• 2023: 4.5%
• 2024 and 2025: 4.0%
• 2026: 3.5%

Kentucky's 3.5% rate applies for the 2026 tax year (KRS 141.020(2)(f)). Further reductions depend on revenue conditions set in law. Verify the rate for your specific tax year at revenue.ky.gov.

Capital Gains: No Preferential Rate

Kentucky taxes capital gains as ordinary income at the same 3.5% flat rate (2026). There is no lower rate for long-term capital gains, and no step-up adjustment for Kentucky purposes. An investor selling appreciated stock or real estate pays 3.5% to Kentucky (2026) regardless of how long they held the asset.

Kentucky Standard Deduction and What You Can Deduct

Kentucky's standard deduction of $3,360 (2026) is one of the lowest in the country. For reference, the 2026 federal standard deduction is $16,100 for single filers and $32,200 for married filing jointly. Because Kentucky starts from federal AGI (which already reflects federal adjustments) and then applies its own smaller deduction, Kentucky taxable income is frequently higher than your federal taxable income on a percentage basis.

Itemized Deductions in Kentucky

If you itemize deductions on your federal return, you may also itemize on your Kentucky return — but Kentucky does not automatically adopt all federal itemized deductions. Kentucky allows:

• Mortgage interest (subject to the same federal limits)
• State and local taxes paid (though Kentucky does not allow deduction of Kentucky income tax itself)
• Charitable contributions
• Certain medical expenses exceeding the AGI threshold

The federal SALT cap ($40,400 for 2026) applies on the federal return but does not directly constrain Kentucky's itemized deductions for state purposes. In practice, most Kentucky taxpayers use the state standard deduction because it simplifies filing, even though it is small.

Kentucky-Specific Income Modifications

Kentucky requires several additions to or subtractions from federal AGI:

• Subtraction: Interest income from U.S. government bonds and securities (taxable federally, subtracted in Kentucky)
• Subtraction: Social Security benefits (fully exempt in Kentucky for state tax purposes)
• Subtraction: Pension and retirement income up to $31,110 per taxpayer (military retirement pay included; more for some government and military retirees)
• Subtraction: Active duty military pay
• Subtraction: State income tax refund included in federal income

Social Security, Military Retirement, and Pension Exemptions

Kentucky's retirement income treatment is one of the more complex in the South and Midwest — generous in some areas, less so in others. Understanding which income streams are exempt and which are taxable is critical for retirement planning.

Exempt or Excludable Income Sources

• Social Security benefits: subtracted on Kentucky Schedule M (line 10), so exempt from Kentucky income tax at all income levels, regardless of total income. There is no threshold above which Social Security becomes taxable in Kentucky (unlike at the federal level, where up to 85% may be taxable).
• Pension and retirement income (all taxpayers): Kentucky excludes up to $31,110 per taxpayer of pension and retirement income reported as taxable on the federal return — private pensions, annuities, IRAs, 401(k)s and similar plans included.
• Government pensions earned before 1998: Federal, Kentucky state and Kentucky local government pension income attributable to service credit earned before January 1, 1998 is fully excludable above the $31,110 (KERS, CERS and TRS retirees may qualify); service after 1997 qualifies through an exempt percentage (Schedule P).
• Military retirement pay: eligible for the $31,110 pension exclusion, and retirees may be able to exclude more (see Schedule P). Active duty military pay is subtracted separately on Schedule M (line 13).

Taxable Retirement Income

• Pensions, 401(k) and traditional IRA distributions, and annuities: taxable at 3.5% to the extent they exceed the exclusion.
• Roth IRA qualified distributions: Tax-free (basis already taxed; gains are federal tax-free and Kentucky follows this treatment).

Comparison Table: Kentucky vs Neighboring States for Retirees

For retirees whose income is primarily Social Security plus a government pension, Kentucky is effectively a very low-tax state despite the headline 3.5% rate — because the primary income sources are exempt or excludable. The burden falls most heavily on retirees drawing large private-sector 401(k) and IRA distributions above the $31,110 exclusion.

Kentucky vs Tennessee: The No-Income-Tax Border

Tennessee eliminated its Hall Tax on investment income in 2021, joining the ranks of true no-income-tax states. For workers and retirees comparing Kentucky to Tennessee, the income tax gap is real, though it has narrowed as Kentucky's rate fell to 3.5%.

Income Tax Savings: Kentucky vs Tennessee

Kentucky tax = (gross income minus $3,360 standard deduction) × 3.5%. Tennessee savings are the full Kentucky tax amount at each level.

But Tennessee Has Its Own Costs

Tennessee's tax advantage on income comes with other trade-offs:

• Sales tax: Tennessee's combined state + local sales tax averages 9.5–9.75%, one of the highest in the country. Kentucky's uniform 6% with no local additions is significantly lower.
• Groceries: Tennessee taxes groceries at 4% state rate (plus local). Kentucky exempts groceries entirely.
• Property tax: Tennessee's effective rate (~0.52%) is lower than Kentucky's (~0.74%), so TN has a modest edge here too.

The Break-Even Analysis

At $100,000 income, moving from Kentucky to Tennessee saves roughly $3,382/year in state income tax. If a household spends $60,000/year on taxable purchases (excluding groceries), the 3.5% higher Tennessee sales tax costs approximately $2,100/year extra. The net advantage of Tennessee at $100K income and $60K spending is roughly $1,100–$1,400/year. At higher incomes, Tennessee's advantage grows substantially since income tax scales with earnings but sales tax does not.

Kentucky vs Ohio and Indiana: Flat-Tax State Comparisons

Kentucky competes for workers and businesses with its flat-tax neighbors Ohio and Indiana. Each state has a different structure, and the best choice depends on income level and spending patterns.

Side-by-Side: Kentucky, Ohio, Indiana

Ohio's Flat-Rate Advantage for Mid-Range Earners

Ohio's flat 2.75% rate (2026, per House Bill 96) beats Kentucky's flat 3.5% at every income level above the $26,050 zero bracket. At $50,000, Ohio's effective state rate is about 1.9%, well below Kentucky's effective 3.26%. Ohio's city income taxes (Columbus 2.5%, Cleveland 2.5%, Cincinnati 1.8%) do, however, substantially raise the burden for urban Ohio residents.

Indiana's Lower Base Rate But County Layers

Indiana's 2.95% state rate is lower than Kentucky's 3.5%, but every Indiana county adds its own income tax. Marion County (Indianapolis) residents pay 4.97% combined (2.95% + 2.02%) — higher than an equivalent Kentucky resident outside a local-tax city. Indiana's property tax constitutional cap (1% of assessed value for owner-occupied homes) is a genuine structural advantage over both Kentucky and Ohio.

Kentucky Property Tax and the 6% Uniform Sales Tax

Property Tax: Moderate and Stable

Kentucky's effective average property tax rate is approximately 0.74% of market value — placing it in roughly the middle of the national range. The state property tax rate itself is very low (approximately $0.122 per $100 assessed value). Most property tax comes from county and school district levies. Property is assessed at 100% of market value in Kentucky.

Sample Property Tax Estimates (2026)

Homestead Exemption for Seniors and Disabled

Kentuckians aged 65 and older, or those who are totally disabled, qualify for a homestead exemption that reduces the assessed value of their primary residence by $49,100 for 2025 and 2026 (recalculated every two years for inflation). For a Louisville senior with a $300,000 home, the exemption reduces taxable value to ~$250,900, saving roughly $360 per year at the 0.74% average effective rate.

Sales Tax: Clean, Uniform, Grocery-Free

Kentucky's sales tax system is one of the simplest in the country:

• Rate: 6% flat statewide — no local additions permitted
• Groceries (food for home consumption): Fully exempt
• Prescription drugs: Exempt
• Prepared food / restaurants: Taxable at 6%
• Digital goods and some services: Kentucky has expanded the sales tax base in recent years to cover more services (personal care, certain digital subscriptions) as part of its revenue-neutral rate reduction strategy

The uniformity is a real benefit for businesses and shoppers: there are no county or city sales tax additions, no need to track multiple rates across jurisdictions, and no "border shopping" incentives to drive to a neighboring county.

Kentucky vs Tennessee Sales Tax

Local Income Taxes in Kentucky: Occupational Taxes in Louisville and Lexington

Kentucky has a history of local occupational taxes — city and county levies on earned income that existed on top of the state income tax. Louisville Metro (Jefferson County), the largest Kentucky city, levies an occupational license tax of 2.2% on resident wages (1.45% for non-residents who work there).

Current Status of Kentucky Local Income Taxes

Many other Kentucky cities and counties also operate local occupational tax systems. Some notable examples:

• Louisville Metro: 2.2% on resident wages; 1.45% for non-residents who work in Louisville Metro
• Lexington-Fayette Urban County Government: 2.25% occupational tax on wages earned within the jurisdiction
• Other cities and counties: set their own rates — verify with the local finance office

Important: Who Pays Local Occupational Tax?

Kentucky's local occupational taxes generally apply to wages earned within the taxing jurisdiction — meaning non-residents who work in Lexington, for example, may owe Lexington's 2.25% occupational tax on wages earned there, even if they live outside the city. Employers are required to withhold and remit these taxes. Workers in affected jurisdictions must often file both a Kentucky state return and a local occupational tax return.

Combined Rate Examples (State + Local)

Always verify local occupational tax rates with the relevant city or county finance office, as rates are set locally and can change annually.