Missouri State Income Tax Calculator
Use this professional‑grade Missouri income tax calculator to estimate your 2024 state income tax, effective and marginal rates, optional city earnings tax (Kansas City or St. Louis), and per‑paycheck withholding. Built for employees, contractors, and planners who need fast, accurate estimates.
Calculator Inputs
Enter your income details. Required fields are marked with an asterisk.
Results
Data Source and Methodology
Authoritative data: Missouri Department of Revenue (DOR) — 2024 Individual Income Tax Rate Schedule and MO‑1040 Instructions (Tax Tables). Published 2024. Direct resources:
- Missouri DOR — Calculators and Tools
- Missouri DOR — Forms and Instructions (see MO‑1040 Instructions and Tax Tables for the current year)
Tutti i calcoli si basano rigorosamente sulle formule e sui dati forniti da questa fonte.
Assumptions to keep the tool transparent and fast: we apply Missouri’s 2024 progressive rate schedule to Missouri taxable income approximated as Adjusted Gross Income (AGI) minus the federal‑equivalent standard deduction. Credits, exemptions, itemized deductions, and the federal tax deduction adjustment are not included. Optional city earnings tax is modeled at 1% of wages for Kansas City or St. Louis for planning purposes.
The Formula Explained
AGI = Gross − PreTax
Missouri Taxable Income: TI = max(0, AGI − Ded)
2024 Missouri progressive tax (piecewise by bracket i with cap c_i and rate r_i):
Tax(TI) = Σ over i [ max(0, min(TI, c_i) − c_{i−1}) × r_i ] , with c_0 = 0
For 2024, brackets (USD):
0%: 0–1,000; 2.0%: 1,001–2,000; 2.5%: 2,001–3,000; 3.0%: 3,001–4,000;
3.5%: 4,001–5,000; 4.0%: 5,001–6,000; 4.5%: 6,001–7,000; 4.8%: 7,001+
City earnings tax (optional): CityTax = Gross × 0.01 (if Kansas City or St. Louis)
Effective rate: Eff = (StateTax + CityTax) / Gross
Glossary of Variables
How It Works: A Step‑by‑Step Example
Scenario: Single filer, annual gross income $65,000; pre‑tax deductions $5,000; standard deduction; no city tax; biweekly pay.
- AGI = $65,000 − $5,000 = $60,000.
- Standard deduction (Single, 2024) = $14,600. TI = $60,000 − $14,600 = $45,400.
- Apply brackets up to TI with the listed rates. The first $7,000 is taxed per the lower brackets; all remaining TI above $7,000 is taxed at 4.8%.
- Sum the bracketed amounts to get the annual Missouri state income tax.
- Per‑paycheck state tax = Annual state tax / 26 (biweekly). City tax is $0 in this scenario.
This mirrors the “Tax(TI)” piecewise formula above and yields the results shown by the calculator.
Frequently Asked Questions (FAQ)
Which tax year does this calculator support?
Tax year 2024 for Missouri. Brackets and rates are based on Missouri DOR materials for 2024. We will update as official guidance changes.
Does it include the federal income tax deduction Missouri sometimes allows?
No. To keep results fast and transparent, we focus on the core bracket calculation and the deduction. Certain adjustments and credits (including any federal tax deduction interplay) are not included.
How accurate are per‑paycheck estimates?
They are the annual tax divided by your pay periods. Payroll withholding formulas and your W‑4 choices may produce different withholding amounts.
How are Kansas City and St. Louis earnings taxes handled?
If selected, a 1% earnings tax is applied to gross wages for planning. The actual base and residency/work rules may vary—confirm with city guidance.
Can I use itemized deductions?
You can approximate by switching to “Custom” and entering your total deduction amount. This tool does not evaluate itemized vs. standard for you.
Will my final return match this estimate exactly?
Not necessarily. Credits, additional income sources, adjustments, and city rules can change your outcome. Use this as an educational planning tool.
Where can I verify the latest Missouri tax tables?
Always refer to the Missouri Department of Revenue at dor.mo.gov for official forms, instructions, and updates.