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Tax year 2026

Iowa vs Missouri Income Tax — 2026

A single filer earning $100,000 pays $614 less per year in Iowa than in Missouri — $51 a month. Iowa charges $3,148; Missouri charges $3,763.

Why this pair has a page: bordering states.

Iowa at $100K
$3,148
3.15%
Missouri at $100K
$3,763
3.76%
Annual difference
$614
$51 a month
National ranks
17 vs 26
of 50, lowest tax first

The bill at every income

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

Iowa and Missouri income tax compared at seven income levels, 2026
Gross incomeIowa taxMissouri taxDifference
$50,000$1,248$1,413$164 less in IA
$75,000$2,198$2,588$389 less in IA
$100,000$3,148$3,763$614 less in IA
$150,000$5,048$6,113$1,064 less in IA
$250,000$8,848$10,813$1,964 less in IA
$500,000$18,348$22,563$4,214 less in IA
$1,000,000$37,348$46,063$8,714 less in IA
Annual state income tax, Iowa versus Missouri
IA at $50,000: $1,248IA at $50,000$1,248MO at $50,000: $1,413MO at $50,000$1,413IA at $75,000: $2,198IA at $75,000$2,198MO at $75,000: $2,588MO at $75,000$2,588IA at $100,000: $3,148IA at $100,000$3,148MO at $100,000: $3,763MO at $100,000$3,763IA at $150,000: $5,048IA at $150,000$5,048MO at $150,000: $6,113MO at $150,000$6,113IA at $250,000: $8,848IA at $250,000$8,848MO at $250,000: $10,813MO at $250,000$10,813IA at $500,000: $18,348IA at $500,000$18,348MO at $500,000: $22,563MO at $500,000$22,563IA at $1,000,000: $37,348IA at $1,000,000$37,348MO at $1,000,000: $46,063MO at $1,000,000$46,063

How the two systems differ

Iowa and Missouri income tax systems compared
IowaMissouri
Tax structureFlat rateGraduated
Top marginal rate3.8%4.7%
Number of brackets18
Standard deduction (single)$16,100$16,100
Personal exemption$40 creditNone
Local income taxesYesYes
Capital gainsordinarypreferential
Population (2024)3,241,4886,245,466

By filing status

Iowa and Missouri tax on $100,000 by filing status, 2026
Filing statusIowaMissouriDifference
Single$3,148$3,763$614 less in IA
Married filing jointly$2,496$3,006$510 less in IA
Married filing separately$3,148$3,763$614 less in IA
Head of household$2,842$3,384$542 less in IA

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, Iowa costs $614 less per year than Missouri — $51 a month.

Iowa compared with Missouri at $100,000
IowaMissouriDifference
State income tax$3,148$3,763$614
Per month$262$314$51
Effective rate3.15%3.76%0.61 pts
Marginal rate3.8%4.7%0.90 pts
Standard deduction$16,100$16,100$0
Taxable income$83,900$83,900$0
Tax structureFlat rateGraduated
Local income taxesYesYes

Local taxes are not included above. Iowa 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: Iowa · Missouri · methodology

Local income taxes change this picture

What this comparison leaves out

Sources for both states

  1. 1.Iowa Department of RevenueState revenue department
    IDR Announces 2026 Individual Income Tax and Interest Rates
    https://revenue.iowa.gov/press-release/2025-10-21/idr-announces-2026-individual-income-tax-and-interest-rates
    Retrieved
  2. 2.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
  3. 3.Missouri Department of RevenueState revenue department
    2026 Missouri Withholding Tax Formula
    https://dor.mo.gov/forms/Withholding%20Formula_2026.pdf
    Retrieved

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