Income Tax Calculator

How Do Marginal Tax Brackets Work?

Most modern tax systems use a progressive or marginal tax system. This means you do not pay a single flat tax rate on your entire income. Instead, your income is divided into "chunks" or "brackets," and each chunk is taxed at a different rate.

An Example of Marginal Tax

Imagine a simple tax system with two brackets:

• 0% on the first $10,000
• 20% on everything over $10,000

If you earn $15,000, you do not pay 20% on the full $15,000. You pay 0% on the first $10,000, and 20% on the remaining $5,000. Your total tax is $1,000. Your effective tax rate is roughly 6.6%, even though your marginal tax rate is 20%.

What is a Standard Deduction?

A standard deduction (or personal allowance) is a portion of your income that is entirely exempt from tax. It effectively creates a 0% tax bracket at the bottom of your income. You subtract the standard deduction from your gross income to find your Taxable Income, which is then run through the tax brackets.

Disclaimer: This tool provides a simplified estimation for educational purposes. It does not account for specific state/local taxes, social security, medicare, specific deductibles, rebates, or edge cases. Always consult a certified public accountant (CPA) for official tax advice.