Kentucky Income Tax Calculator

How to Use This Kentucky Income Tax Calculator

This Kentucky income tax calculator estimates your annual state and federal tax liability for 2025 and 2026. Enter your gross wages, filing status, and any pre-tax deductions above. Kentucky applies a flat 3.5% rate to taxable income after subtracting the standard deduction ($3,160 single / $6,320 MFJ for 2026) — one rate, no brackets, no phase-outs.

For a per-paycheck view of Kentucky withholding and take-home pay, use the Kentucky paycheck calculator. To compare Kentucky against other states, use the general income tax calculator.

How Kentucky's Flat 3.5% Tax Rate Works

Kentucky is a flat-rate income tax state — the same percentage applies to every dollar of taxable income regardless of how much you earn. The rate has been declining under Kentucky House Bill 8 (enacted 2022): 5.0% (2022) → 4.5% (2023) → 4.0% (2024 & 2025) → 3.5% (2026). Further reductions to 3.0% and below may follow if state revenue benchmarks continue to be met.

Kentucky's flat rate applies to:

• W-2 wages and salaries — including bonuses and overtime, after the standard deduction.
• Self-employment income — net earnings after business deductions.
• Interest, dividends, and capital gains — taxed as ordinary income at the flat rate; no preferential capital gains rate.
• Retirement income (partially) — Social Security is fully exempt. Pension income up to $31,110 per taxpayer is also exempt. Amounts above the exclusion are taxed at 3.5%.

Kentucky Standard Deduction and Exemptions

The Kentucky standard deduction is $3,160 for single filers and $6,320 for married filing jointly in 2026. Unlike many states, Kentucky does not provide an additional personal exemption — the standard deduction is the only general income reduction before the flat rate applies.

For a single filer with $70,000 in gross wages in 2026, the Kentucky calculation is:

1. Gross income: $70,000
2. Subtract Kentucky standard deduction: $70,000 − $3,160 = $66,840 (KY taxable income)
3. Apply flat rate: $66,840 × 3.5% = $2,339 in Kentucky state income tax

Kentucky also recognizes traditional 401(k), 403(b), and HSA pre-tax contributions, reducing taxable income in the same way as federal rules. Social Security income is fully excluded.

FICA Taxes — Social Security and Medicare

FICA taxes are federal and apply to every Kentucky paycheck:

• Social Security: 6.2% on wages up to $176,100 (2025) or $184,500 (2026). No further withholding once you hit the wage base.
• Medicare: 1.45% on all wages with no cap.
• Additional Medicare: 0.9% on wages above $200,000 (single) or $250,000 (married jointly) — employee only, no employer match.

Step-by-Step Example — $80,000 Kentucky Single Filer (2026)

Full annual tax calculation for a single Kentucky resident earning $80,000 in wages, without local occupational tax:

1. Gross wages: $80,000
2. Federal standard deduction: −$16,100 → federal taxable income: $63,900
3. Federal income tax (10% + 12% + 22% brackets): ≈ $9,250
4. FICA: $80,000 × 7.65% = $6,120
5. KY standard deduction: −$3,160 → KY taxable income: $76,840
6. Kentucky income tax: $76,840 × 3.5% = $2,689
7. Total taxes: $9,250 + $6,120 + $2,689 = $18,059
8. Annual net income: $80,000 − $18,059 = $61,941

How to Reduce Your Kentucky Annual Tax Liability

• Maximize traditional 401(k) contributions — the 2026 limit is $23,500 ($31,000 if 50+). At a combined 3.5% KY + 22% federal rate, every $1,000 contributed saves $255 in taxes.
• Contribute to an HSA — $4,300 (self-only) or $8,550 (family) in 2026. Reduces both federal and Kentucky taxable income; FICA savings apply through payroll.
• Take the pension exclusion if applicable — if you receive pension or retirement income, up to $31,110 per taxpayer is exempt from KY tax. This can eliminate most or all Kentucky tax for many retirees.
• Dependent Care FSA — up to $5,000 pre-tax for childcare reduces both federal and KY taxable wages.
• File a corrected K-4— Kentucky's withholding form (K-4) should reflect your current deductions and filing status. An outdated K-4 is the most common cause of under-withholding for Kentucky filers who change jobs or life circumstances.

Retirement Income and Kentucky Taxes

Kentucky has favorable treatment for several types of retirement income, making it a relatively retiree-friendly state despite the flat income tax rate:

• Social Security benefits — Kentucky fully exempts Social Security benefits from state income tax for all residents, regardless of age or income level. No portion of Social Security is included in Kentucky taxable income.
• Pension income exclusion — Kentucky allows a $31,110 pension income exclusion per taxpayer per return. This covers qualifying pension income from private plans, government defined-benefit pensions, and certain annuities. A married couple where both spouses receive pension income can each claim $31,110 for a total exclusion of $62,220. This exclusion eliminates Kentucky income tax for most retirees with moderate pension income.
• Government and KERS pensions— Retirement income from the Kentucky Employees Retirement System (KERS), Teachers' Retirement System (TRS), and other Kentucky state and local government pension plans counts toward the $31,110 pension exclusion. Amounts above the exclusion are taxed at the flat 3.5% rate.
• Military retirement pay — Fully exempt from Kentucky income tax for all Kentucky residents, regardless of the $31,110 pension exclusion cap.
• 401(k) and IRA distributions — These do not qualify for the $31,110 pension exclusion in Kentucky. Distributions from 401(k) plans, 403(b) plans, and IRAs are taxed as ordinary income at the flat 3.5% rate after the $3,160 standard deduction. Retirees drawing from 401(k) accounts (not defined-benefit pensions) should plan accordingly.

Kentucky Tax Credits and Deductions

• Standard deduction — Kentucky provides a $3,160 standard deduction (same for single, married filing separately, and head of household) or $6,320 for married filing jointly in 2026. Unlike most states, Kentucky uses a single amount regardless of filing status for single filers.
• No state EITC — Kentucky does not have a state Earned Income Tax Credit. Low- and moderate-income Kentucky workers can claim the federal EITC on their federal return but receive no additional Kentucky credit tied to it.
• Family size tax credit — Kentucky provides a refundable credit for lower-income families. The credit phases out as income rises and is designed to ensure low-income households with children are not pushed below the poverty line by state income tax.
• Education tuition tax credit — Kentucky allows a nonrefundable credit equal to 25% of tuition paid (up to $500) for qualifying higher education expenses. This is a modest credit aimed at in-state college expenses.
• Kentucky 529 (KY Saves 529) — Unlike some states, Kentucky does not currently offer a state income tax deduction for 529 college savings plan contributions. Kentucky residents may contribute to KY Saves 529 for federal and estate planning benefits, but there is no Kentucky income tax deduction for doing so.

Kentucky State Tax Return — Form 740 and Filing Deadline

Kentucky residents file their state income tax return on Form 740(Kentucky Individual Income Tax Return). The Kentucky filing deadline is April 15, the same as the federal return. Kentucky grants an automatic six-month extension to file (to October 15), but any Kentucky tax owed must be paid by April 15 to avoid interest and penalties. Use Form 740-EXT and pay online through the Kentucky Department of Revenue to request an extension payment.

Tax Disclaimer

This calculator provides estimates for informational purposes only. It is not tax advice. Kentucky tax rates, standard deduction amounts, local occupational tax rates, and retirement income exclusions can change each year. Federal brackets, FICA wage bases, and standard deduction amounts also change annually. Consult a qualified tax professional or CPA for guidance on your specific situation.