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Utilnivo

Finance

Simple Tax Calculator

  • Browser-based
  • No signup

Enter gross income, optional deductions, a primary tax rate, and an optional additional rate such as state tax. See taxable income, total tax, net income, effective rate, and monthly estimates. This is a simple percentage-based estimate—not full tax brackets, filing status, or jurisdiction rules. Calculations run in your browser and are educational estimates only.

100% Client-Side

Your data never leaves your computer.

How to use this tool

Enter your gross annual income, any deductions, and your estimated federal tax rate. Add a state or local rate if needed, then calculate to see taxable income, total tax, net income, and monthly take-home estimates.

Worked example

Example: $75,000 gross income with $5,000 deductions and a combined 25% rate (22% federal + 3% state) gives $17,500 in estimated tax and about $57,500 net income, or roughly $4,800/month.

How it works

Enter gross income, optional deductions, a primary tax rate, and an optional additional rate (for example state tax). Taxable income is gross income minus deductions, then each rate is applied to taxable income. Results show total tax, net income, effective rate, and monthly estimates. This is a simple estimate, not official tax advice.

Limitations

This calculator applies a simple percentage to taxable income. It is not tax advice and does not account for jurisdiction, tax year, filing status, brackets, credits, or local rules. Consult a qualified tax professional for personal guidance.

Privacy and file handling

Your data is processed in your browser and is not uploaded to our server.

Accuracy & methodology

This section documents how the calculator works, what it leaves out, and when results were last reviewed. Figures are educational estimates—not professional advice—and are not labeled "current" unless tied to automatically updated reference data.

Formula source or methodology
Taxable income = max(0, gross − deductions). Primary tax = taxable × primary rate%. Additional tax = taxable × additional rate%. Net = gross − total tax.
Jurisdiction
User-defined (no built-in country tables)
Unit system
Currency; percent rates
Rounding method
Currency amounts round to two decimal places (half up via Math.round × 100 / 100). Effective rate uses Percentages round to two decimal places unless shown as whole percents in the UI.
Assumptions
  • Flat effective rates entered by the user—not progressive brackets
  • Deductions are a single lump sum
  • Annual income; monthly figures divide by 12
Known omissions
  • Not tax, legal, investment, or lending advice. Confirm material decisions with qualified professionals.
  • Federal income tax brackets, standard deduction, and credits for any tax year
  • State and local income taxes
  • Filing status (single, married, head of household, etc.)
  • Payroll taxes (FICA, Medicare surtax) and self-employment tax
  • Alternative Minimum Tax (AMT) and net investment income tax
  • Capital gains preferential rates
Test cases (automated)
  • $50,000 gross, $10,000 deductions, 20% rate → $8,000 tax and $42,000 net
  • Deductions exceeding gross clamp taxable income to zero
  • Combined rates over 100% are rejected
Version & last verified

Logic version 1.0. Content and formulas last verified .

Specialized Simple Tax Calculator guides

Explore focused guides for common searches—each page reuses this simple tax calculator with different examples and FAQs.

Frequently asked questions

How is taxable income calculated?

Taxable income is gross income minus deductions, floored at zero. Each tax rate is then applied to taxable income.

What is the additional tax rate for?

Use it for a second flat rate such as state or local tax. Leave it at 0 if you only need one rate.

Is this official tax advice?

No. Results are simple estimates based on the income, deductions, and rates you enter. Real tax rules vary by location, filing status, credits, and brackets.

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