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Tax year 2026

Kentucky vs Missouri Income Tax — 2026

A single filer earning $100,000 pays $380 less per year in Kentucky than in Missouri — $32 a month. Kentucky charges $3,382; Missouri charges $3,763.

Why this pair has a page: bordering states.

Kentucky at $100K
$3,382
3.38%
Missouri at $100K
$3,763
3.76%
Annual difference
$380
$32 a month
National ranks
20 vs 26
of 50, lowest tax first

The bill at every income

Single filer, standard deduction, no dependents. State income tax only.

Kentucky and Missouri income tax compared at seven income levels, 2026
Gross incomeKentucky taxMissouri taxDifference
$50,000$1,632$1,413$220 less in MO
$75,000$2,507$2,588$80 less in KY
$100,000$3,382$3,763$380 less in KY
$150,000$5,132$6,113$980 less in KY
$250,000$8,632$10,813$2,180 less in KY
$500,000$17,382$22,563$5,180 less in KY
$1,000,000$34,882$46,063$11,180 less in KY
Annual state income tax, Kentucky versus Missouri
KY at $50,000: $1,632KY at $50,000$1,632MO at $50,000: $1,413MO at $50,000$1,413KY at $75,000: $2,507KY at $75,000$2,507MO at $75,000: $2,588MO at $75,000$2,588KY at $100,000: $3,382KY at $100,000$3,382MO at $100,000: $3,763MO at $100,000$3,763KY at $150,000: $5,132KY at $150,000$5,132MO at $150,000: $6,113MO at $150,000$6,113KY at $250,000: $8,632KY at $250,000$8,632MO at $250,000: $10,813MO at $250,000$10,813KY at $500,000: $17,382KY at $500,000$17,382MO at $500,000: $22,563MO at $500,000$22,563KY at $1,000,000: $34,882KY at $1,000,000$34,882MO at $1,000,000: $46,063MO at $1,000,000$46,063

How the two systems differ

Kentucky and Missouri income tax systems compared
KentuckyMissouri
Tax structureFlat rateGraduated
Top marginal rate3.5%4.7%
Number of brackets18
Standard deduction (single)$3,360$16,100
Personal exemptionNoneNone
Local income taxesYesYes
Capital gainsordinarypreferential
Population (2024)4,588,3726,245,466

By filing status

Kentucky and Missouri tax on $100,000 by filing status, 2026
Filing statusKentuckyMissouriDifference
Single$3,382$3,763$380 less in KY
Married filing jointly$3,382$3,006$376 less in MO
Married filing separately$3,382$3,763$380 less in KY
Head of household$3,382$3,384$2 less in KY

Change the assumptions

Adjust income and filing status, or swap either state. The URL updates so you can share the exact comparison.

At $100,000 as a single filer, Kentucky costs $380 less per year than Missouri — $32 a month.

Kentucky compared with Missouri at $100,000
KentuckyMissouriDifference
State income tax$3,382$3,763$380
Per month$282$314$32
Effective rate3.38%3.76%0.38 pts
Marginal rate3.5%4.7%1.20 pts
Standard deduction$3,360$16,100$12,740
Taxable income$96,640$83,900$12,740
Tax structureFlat rateGraduated
Local income taxesYesYes

Local taxes are not included above. Kentucky and Missouri have localities that levy their own income tax on top of the state figure. See each state page for the rates that apply.

Full detail: Kentucky · Missouri · methodology

Local income taxes change this picture

What this comparison leaves out

Sources for both states

  1. 1.Kentucky Department of RevenueState revenue department
    2026 Kentucky Withholding Tax Formula (42A003 (TCF)(10-2025))
    https://revenue.ky.gov/Forms/2026%20Withholding%20Formula.pdf
    Retrieved · "2026 Kentucky Standard Deduction: $3,360. 2026 Kentucky Tax Rate: 3.5% of taxable income."
  2. 2.Tax FoundationResearch organisation (cross-check)
    Kentucky Tax Rates & Rankings
    https://taxfoundation.org/location/kentucky/
    Retrieved · Cross-check: "Kentucky has a flat 3.50 percent individual income tax rate."
  3. 3.Missouri Department of RevenueState revenue department
    2026 Missouri Withholding Tax Formula
    https://dor.mo.gov/forms/Withholding%20Formula_2026.pdf
    Retrieved
  4. 4.Tax FoundationResearch organisation (cross-check)
    State Individual Income Tax Rates and Brackets, 2026
    https://taxfoundation.org/data/all/state/state-income-tax-rates-2026/
    Retrieved

Figures on this page were last checked against these sources on . Found something wrong? Report it.