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.

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.