Oklahoma State Income Tax Calculator

This Oklahoma income tax calculator provides a clear, accessible estimate of your state income tax for 2024. It is designed for employees, contractors, and planners who need a fast, transparent view of annual and per‑paycheck Oklahoma state tax—without guesswork.

Calculator

Choose the status used on your Oklahoma return.

Results

Annual gross income $0.00
Annual pre‑tax deductions $0.00
Deduction applied $0.00
Other OK adjustments $0.00
Oklahoma taxable income $0.00
Marginal rate 0%
Estimated OK state tax (annual) $0.00
Per‑paycheck OK tax $0.00
Effective rate 0%
Take‑home per paycheck (state‑only) $0.00

Notes: Estimates reflect Oklahoma state income tax only. Federal tax, FICA, local taxes, credits, and special Oklahoma adjustments are not included.

Data Source and Methodology

Authoritative data: Oklahoma Tax Commission — 2024 Individual Income Tax Packet (Form 511/511NR Instructions & Rate Schedules). Direct resource: oklahoma.gov/tax (see 2024 rate schedules and instructions). All calculations are grounded in Oklahoma’s progressive rate schedule. Standard deduction values reflect federal 2024 amounts as commonly referenced for Oklahoma conformity.

All calculations are strictly based on the formulas and data provided by this source.

The Formula Explained

For annualization (given pay frequency F):
$AnnualGross = Gross_{period} \times F$
$AnnualPreTax = PreTax_{period} \times F$

Deduction applied:
$D = \begin{cases} SD(status), & \text{if Standard Deduction is chosen} \\ Itemized, & \text{if Itemized is chosen} \end{cases}$

Oklahoma taxable income:
$TI = \max\left(0,\; AnnualGross - AnnualPreTax - D - OtherOK\right)$

Progressive tax using bracket set $B = \{(l_i,u_i,r_i)\}$:
$Tax = \sum_{i} r_i \cdot \max\left(0,\; \min(TI, u_i) - l_i \right)$
where $l_i$ and $u_i$ are the lower and upper bounds of bracket i (with $u_{last} = \infty$) and $r_i$ is the marginal rate.

Effective and marginal rates:
$Effective = \dfrac{Tax}{AnnualGross}$,   $Marginal = r_k \text{ for the bracket } k \text{ where } TI \in [l_k, u_k)$.

Glossary of Variables

Worked Example

How It Works: A Step‑by‑Step Example

Suppose you are Single, paid biweekly at $2,500 gross per paycheck, contributing $200 pre‑tax per paycheck to a 401(k). You take the standard deduction.

  1. Annualize: Annual Gross = 2,500 × 26 = $65,000; Annual Pre‑tax = 200 × 26 = $5,200.
  2. Deduction: Standard deduction (Single 2024) = $14,600. Other OK adjustments = $0.
  3. Taxable income: TI = max(0, 65,000 − 5,200 − 14,600 − 0) = $45,200.
  4. Apply Oklahoma brackets (Single):
    • 0.25% on first $1,000 → $2.50
    • 0.75% on $1,000–$2,500 (1,500) → $11.25
    • 1.75% on $2,500–$3,750 (1,250) → $21.88
    • 2.75% on $3,750–$4,900 (1,150) → $31.63
    • 3.75% on $4,900–$7,200 (2,300) → $86.25
    • 4.75% on the remainder up to $45,200 → ($45,200 − $7,200) × 0.0475 = $1,802.50
    Total ≈ $2, - sum above = $2, - rounding: $2, - actually $2, - combined ≈ $1,955.99.
  5. Per‑paycheck OK tax: $1,955.99 ÷ 26 ≈ $75.23.
  6. Marginal rate: 4.75%. Effective rate: $1,955.99 ÷ $65,000 ≈ 3.01%.

This illustration is approximate and excludes credits or special adjustments.

Frequently Asked Questions (FAQ)

Which tax year is used?

The calculator uses the 2024 Oklahoma rate schedule and 2024 standard deduction amounts.

Does this include federal, Social Security, or Medicare?

No. Results reflect Oklahoma state income tax only.

How accurate are the results?

They are high‑quality estimates based on the rate schedule. Your final return may differ due to credits, itemization rules, and specific Oklahoma adjustments.

Do bracket thresholds change with filing status?

In this tool, Married Filing Jointly thresholds are doubled vs. Single. Single, Head of Household, and Married Filing Separately use Single thresholds.

What if I’m a nonresident?

Nonresidents with Oklahoma‑source income may have different filing considerations. This calculator focuses on residency tax liability estimation and does not apportion multi‑state income.

Where can I verify the tax tables?

See the Oklahoma Tax Commission’s Individual Income Tax Packet (2024) for rate schedules, instructions, and updates.

Can I itemize for Oklahoma if I take the federal standard deduction?

Oklahoma’s itemization rules can differ from federal. Consult OTC instructions to confirm eligibility and limitations.

Authorship and Review

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
For annualization (given pay frequency F): $AnnualGross = Gross_{period} \times F$ $AnnualPreTax = PreTax_{period} \times F$ Deduction applied: $D = \begin{cases} SD(status), & \text{if Standard Deduction is chosen} \\ Itemized, & \text{if Itemized is chosen} \end{cases}$ Oklahoma taxable income: $TI = \max\left(0,\; AnnualGross - AnnualPreTax - D - OtherOK\right)$ Progressive tax using bracket set $B = \{(l_i,u_i,r_i)\}$: $Tax = \sum_{i} r_i \cdot \max\left(0,\; \min(TI, u_i) - l_i \right)$ where $l_i$ and $u_i$ are the lower and upper bounds of bracket i (with $u_{last} = \infty$) and $r_i$ is the marginal rate. Effective and marginal rates: $Effective = \dfrac{Tax}{AnnualGross}$, $Marginal = r_k \text{ for the bracket } k \text{ where } TI \in [l_k, u_k)$.
Variables and units
  • T = property tax (annual or monthly depending on input) (currency)
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn
, ', svg: { fontCache: 'global' } };

Oklahoma State Income Tax Calculator

This Oklahoma income tax calculator provides a clear, accessible estimate of your state income tax for 2024. It is designed for employees, contractors, and planners who need a fast, transparent view of annual and per‑paycheck Oklahoma state tax—without guesswork.

Calculator

Choose the status used on your Oklahoma return.

Results

Annual gross income $0.00
Annual pre‑tax deductions $0.00
Deduction applied $0.00
Other OK adjustments $0.00
Oklahoma taxable income $0.00
Marginal rate 0%
Estimated OK state tax (annual) $0.00
Per‑paycheck OK tax $0.00
Effective rate 0%
Take‑home per paycheck (state‑only) $0.00

Notes: Estimates reflect Oklahoma state income tax only. Federal tax, FICA, local taxes, credits, and special Oklahoma adjustments are not included.

Data Source and Methodology

Authoritative data: Oklahoma Tax Commission — 2024 Individual Income Tax Packet (Form 511/511NR Instructions & Rate Schedules). Direct resource: oklahoma.gov/tax (see 2024 rate schedules and instructions). All calculations are grounded in Oklahoma’s progressive rate schedule. Standard deduction values reflect federal 2024 amounts as commonly referenced for Oklahoma conformity.

All calculations are strictly based on the formulas and data provided by this source.

The Formula Explained

For annualization (given pay frequency F):
$AnnualGross = Gross_{period} \times F$
$AnnualPreTax = PreTax_{period} \times F$

Deduction applied:
$D = \begin{cases} SD(status), & \text{if Standard Deduction is chosen} \\ Itemized, & \text{if Itemized is chosen} \end{cases}$

Oklahoma taxable income:
$TI = \max\left(0,\; AnnualGross - AnnualPreTax - D - OtherOK\right)$

Progressive tax using bracket set $B = \{(l_i,u_i,r_i)\}$:
$Tax = \sum_{i} r_i \cdot \max\left(0,\; \min(TI, u_i) - l_i \right)$
where $l_i$ and $u_i$ are the lower and upper bounds of bracket i (with $u_{last} = \infty$) and $r_i$ is the marginal rate.

Effective and marginal rates:
$Effective = \dfrac{Tax}{AnnualGross}$,   $Marginal = r_k \text{ for the bracket } k \text{ where } TI \in [l_k, u_k)$.

Glossary of Variables

Worked Example

How It Works: A Step‑by‑Step Example

Suppose you are Single, paid biweekly at $2,500 gross per paycheck, contributing $200 pre‑tax per paycheck to a 401(k). You take the standard deduction.

  1. Annualize: Annual Gross = 2,500 × 26 = $65,000; Annual Pre‑tax = 200 × 26 = $5,200.
  2. Deduction: Standard deduction (Single 2024) = $14,600. Other OK adjustments = $0.
  3. Taxable income: TI = max(0, 65,000 − 5,200 − 14,600 − 0) = $45,200.
  4. Apply Oklahoma brackets (Single):
    • 0.25% on first $1,000 → $2.50
    • 0.75% on $1,000–$2,500 (1,500) → $11.25
    • 1.75% on $2,500–$3,750 (1,250) → $21.88
    • 2.75% on $3,750–$4,900 (1,150) → $31.63
    • 3.75% on $4,900–$7,200 (2,300) → $86.25
    • 4.75% on the remainder up to $45,200 → ($45,200 − $7,200) × 0.0475 = $1,802.50
    Total ≈ $2, - sum above = $2, - rounding: $2, - actually $2, - combined ≈ $1,955.99.
  5. Per‑paycheck OK tax: $1,955.99 ÷ 26 ≈ $75.23.
  6. Marginal rate: 4.75%. Effective rate: $1,955.99 ÷ $65,000 ≈ 3.01%.

This illustration is approximate and excludes credits or special adjustments.

Frequently Asked Questions (FAQ)

Which tax year is used?

The calculator uses the 2024 Oklahoma rate schedule and 2024 standard deduction amounts.

Does this include federal, Social Security, or Medicare?

No. Results reflect Oklahoma state income tax only.

How accurate are the results?

They are high‑quality estimates based on the rate schedule. Your final return may differ due to credits, itemization rules, and specific Oklahoma adjustments.

Do bracket thresholds change with filing status?

In this tool, Married Filing Jointly thresholds are doubled vs. Single. Single, Head of Household, and Married Filing Separately use Single thresholds.

What if I’m a nonresident?

Nonresidents with Oklahoma‑source income may have different filing considerations. This calculator focuses on residency tax liability estimation and does not apportion multi‑state income.

Where can I verify the tax tables?

See the Oklahoma Tax Commission’s Individual Income Tax Packet (2024) for rate schedules, instructions, and updates.

Can I itemize for Oklahoma if I take the federal standard deduction?

Oklahoma’s itemization rules can differ from federal. Consult OTC instructions to confirm eligibility and limitations.

Authorship and Review

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
For annualization (given pay frequency F): $AnnualGross = Gross_{period} \times F$ $AnnualPreTax = PreTax_{period} \times F$ Deduction applied: $D = \begin{cases} SD(status), & \text{if Standard Deduction is chosen} \\ Itemized, & \text{if Itemized is chosen} \end{cases}$ Oklahoma taxable income: $TI = \max\left(0,\; AnnualGross - AnnualPreTax - D - OtherOK\right)$ Progressive tax using bracket set $B = \{(l_i,u_i,r_i)\}$: $Tax = \sum_{i} r_i \cdot \max\left(0,\; \min(TI, u_i) - l_i \right)$ where $l_i$ and $u_i$ are the lower and upper bounds of bracket i (with $u_{last} = \infty$) and $r_i$ is the marginal rate. Effective and marginal rates: $Effective = \dfrac{Tax}{AnnualGross}$, $Marginal = r_k \text{ for the bracket } k \text{ where } TI \in [l_k, u_k)$.
Variables and units
  • T = property tax (annual or monthly depending on input) (currency)
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn
]], displayMath: [['\\[','\\]']] }, svg: { fontCache: 'global' } };, svg: { fontCache: 'global' } };

Oklahoma State Income Tax Calculator

This Oklahoma income tax calculator provides a clear, accessible estimate of your state income tax for 2024. It is designed for employees, contractors, and planners who need a fast, transparent view of annual and per‑paycheck Oklahoma state tax—without guesswork.

Calculator

Choose the status used on your Oklahoma return.

Results

Annual gross income $0.00
Annual pre‑tax deductions $0.00
Deduction applied $0.00
Other OK adjustments $0.00
Oklahoma taxable income $0.00
Marginal rate 0%
Estimated OK state tax (annual) $0.00
Per‑paycheck OK tax $0.00
Effective rate 0%
Take‑home per paycheck (state‑only) $0.00

Notes: Estimates reflect Oklahoma state income tax only. Federal tax, FICA, local taxes, credits, and special Oklahoma adjustments are not included.

Data Source and Methodology

Authoritative data: Oklahoma Tax Commission — 2024 Individual Income Tax Packet (Form 511/511NR Instructions & Rate Schedules). Direct resource: oklahoma.gov/tax (see 2024 rate schedules and instructions). All calculations are grounded in Oklahoma’s progressive rate schedule. Standard deduction values reflect federal 2024 amounts as commonly referenced for Oklahoma conformity.

All calculations are strictly based on the formulas and data provided by this source.

The Formula Explained

For annualization (given pay frequency F):
$AnnualGross = Gross_{period} \times F$
$AnnualPreTax = PreTax_{period} \times F$

Deduction applied:
$D = \begin{cases} SD(status), & \text{if Standard Deduction is chosen} \\ Itemized, & \text{if Itemized is chosen} \end{cases}$

Oklahoma taxable income:
$TI = \max\left(0,\; AnnualGross - AnnualPreTax - D - OtherOK\right)$

Progressive tax using bracket set $B = \{(l_i,u_i,r_i)\}$:
$Tax = \sum_{i} r_i \cdot \max\left(0,\; \min(TI, u_i) - l_i \right)$
where $l_i$ and $u_i$ are the lower and upper bounds of bracket i (with $u_{last} = \infty$) and $r_i$ is the marginal rate.

Effective and marginal rates:
$Effective = \dfrac{Tax}{AnnualGross}$,   $Marginal = r_k \text{ for the bracket } k \text{ where } TI \in [l_k, u_k)$.

Glossary of Variables

Worked Example

How It Works: A Step‑by‑Step Example

Suppose you are Single, paid biweekly at $2,500 gross per paycheck, contributing $200 pre‑tax per paycheck to a 401(k). You take the standard deduction.

  1. Annualize: Annual Gross = 2,500 × 26 = $65,000; Annual Pre‑tax = 200 × 26 = $5,200.
  2. Deduction: Standard deduction (Single 2024) = $14,600. Other OK adjustments = $0.
  3. Taxable income: TI = max(0, 65,000 − 5,200 − 14,600 − 0) = $45,200.
  4. Apply Oklahoma brackets (Single):
    • 0.25% on first $1,000 → $2.50
    • 0.75% on $1,000–$2,500 (1,500) → $11.25
    • 1.75% on $2,500–$3,750 (1,250) → $21.88
    • 2.75% on $3,750–$4,900 (1,150) → $31.63
    • 3.75% on $4,900–$7,200 (2,300) → $86.25
    • 4.75% on the remainder up to $45,200 → ($45,200 − $7,200) × 0.0475 = $1,802.50
    Total ≈ $2, - sum above = $2, - rounding: $2, - actually $2, - combined ≈ $1,955.99.
  5. Per‑paycheck OK tax: $1,955.99 ÷ 26 ≈ $75.23.
  6. Marginal rate: 4.75%. Effective rate: $1,955.99 ÷ $65,000 ≈ 3.01%.

This illustration is approximate and excludes credits or special adjustments.

Frequently Asked Questions (FAQ)

Which tax year is used?

The calculator uses the 2024 Oklahoma rate schedule and 2024 standard deduction amounts.

Does this include federal, Social Security, or Medicare?

No. Results reflect Oklahoma state income tax only.

How accurate are the results?

They are high‑quality estimates based on the rate schedule. Your final return may differ due to credits, itemization rules, and specific Oklahoma adjustments.

Do bracket thresholds change with filing status?

In this tool, Married Filing Jointly thresholds are doubled vs. Single. Single, Head of Household, and Married Filing Separately use Single thresholds.

What if I’m a nonresident?

Nonresidents with Oklahoma‑source income may have different filing considerations. This calculator focuses on residency tax liability estimation and does not apportion multi‑state income.

Where can I verify the tax tables?

See the Oklahoma Tax Commission’s Individual Income Tax Packet (2024) for rate schedules, instructions, and updates.

Can I itemize for Oklahoma if I take the federal standard deduction?

Oklahoma’s itemization rules can differ from federal. Consult OTC instructions to confirm eligibility and limitations.

Authorship and Review

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
For annualization (given pay frequency F): $AnnualGross = Gross_{period} \times F$ $AnnualPreTax = PreTax_{period} \times F$ Deduction applied: $D = \begin{cases} SD(status), & \text{if Standard Deduction is chosen} \\ Itemized, & \text{if Itemized is chosen} \end{cases}$ Oklahoma taxable income: $TI = \max\left(0,\; AnnualGross - AnnualPreTax - D - OtherOK\right)$ Progressive tax using bracket set $B = \{(l_i,u_i,r_i)\}$: $Tax = \sum_{i} r_i \cdot \max\left(0,\; \min(TI, u_i) - l_i \right)$ where $l_i$ and $u_i$ are the lower and upper bounds of bracket i (with $u_{last} = \infty$) and $r_i$ is the marginal rate. Effective and marginal rates: $Effective = \dfrac{Tax}{AnnualGross}$, $Marginal = r_k \text{ for the bracket } k \text{ where } TI \in [l_k, u_k)$.
Variables and units
  • T = property tax (annual or monthly depending on input) (currency)
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn