Kansas State Income Tax Calculator

Use this professional-grade Kansas income tax calculator to estimate your 2024 state individual income tax. Enter your Kansas taxable income and filing status to see your tax owed, marginal rate, effective rate, and a transparent bracket breakdown.

Results

Kansas tax owed $0.00
Effective tax rate 0.00%
Marginal tax rate 0.00%
After-tax income (from taxable) $0.00

Bracket breakdown

Data Source and Methodology

Authoritative source: Kansas Department of Revenue — Individual Income Tax, 2024 Rate Schedules (K‑40 Instructions). See: ksrevenue.gov and K‑40 instructions (2024). Direct resource: Withholding & Tax Calculators and the K‑40 instructions for rate schedules. All calculations strictly follow the progressive rate schedules published by KDOR.

All computations strictly adhere to the formulas and data provided by this source.

The Formula Explained

$$ Tax = \sum_{i=1}^{n} r_i \cdot \max\!\left(0,\; \min\!\left(I,\; U_i\right) - L_i \right) $$ where: $$ I = \text{Kansas taxable income} $$ $$ \{(L_i, U_i, r_i)\} = \text{bracket lower bound, upper bound, and rate for your filing status} $$ Marginal rate: $$ r_{\text{marginal}} = r_j \quad \text{for the bracket } j \text{ that contains } I $$ Effective rate: $$ r_{\text{effective}} = \frac{Tax}{I} \quad (\text{defined as } 0 \text{ if } I = 0) $$

For 2024, Kansas applies three progressive rates. Bracket thresholds depend on filing status.

Glossary of Variables

NameMeaning
Filing statusYour status for Kansas purposes (Single, MFS, HOH, MFJ, QW).
Kansas taxable income (I)Income after Kansas adjustments, deductions, and exemptions as shown on Form K‑40.
Tax owed (Tax)Total state income tax due from applying the progressive brackets.
Marginal rate (r_marginal)The rate applied to your last dollar of income within your highest active bracket.
Effective rate (r_effective)Tax owed divided by taxable income; a measure of your average tax rate.
After‑tax incomeTaxable income minus Kansas tax owed (for reference on the taxable base).

Worked Example

How It Works: A Step‑by‑Step Example

Scenario: Single filer, Kansas taxable income I = $52,000 (Tax year 2024).

  1. Apply 3.1% to the first $15,000: 0.031 × 15,000 = $465.00.
  2. Apply 5.25% to the next $15,000: 0.0525 × 15,000 = $787.50.
  3. Apply 5.7% to the remainder: 52,000 − 30,000 = 22,000; 0.057 × 22,000 = $1,254.00.
  4. Total tax: $465.00 + $787.50 + $1,254.00 = $2,506.50.
  5. Marginal rate: 5.7%; Effective rate: 2,506.50 / 52,000 ≈ 4.82%.
$$ Tax = 0.031 \cdot 15000 \;+\; 0.0525 \cdot 15000 \;+\; 0.057 \cdot (52000-30000) = 2506.5 $$

Frequently Asked Questions (FAQ)

Which tax year is covered?

This tool covers the Kansas 2024 individual income tax rate schedules. Always verify current-year changes on the Kansas Department of Revenue website.

What rates and thresholds are used?

For 2024, rates are 3.1%, 5.25%, and 5.7%. Thresholds depend on filing status: Single/HOH/MFS share one schedule; MFJ/QW thresholds are doubled.

Can I plug in my gross pay?

Enter Kansas taxable income for the most accurate result. Gross pay differs from taxable income due to adjustments and deductions.

Does this account for credits?

No. This calculator applies the progressive bracket formula only. Credits and specialized adjustments are beyond its scope.

Is the result the same as what appears on my K‑40?

It should closely match the tax computed from the 2024 rate schedules. Minor differences can arise due to rounding or additional form-specific rules.

Is Head of Household treated like Single?

For 2024 brackets, HOH uses the same thresholds as Single in this tool. If KDOR publishes different thresholds, those prevail.

Who should I contact for personalized advice?

Consult a qualified tax professional or contact the Kansas Department of Revenue for official guidance.