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Financial Literacy
How Income Tax Works
Brackets, rates, and the paycheck
Related Worksheets
Income tax is money that workers pay to the government based on how much taxable income they earn. It helps fund public services such as schools, roads, national defense, health programs, and emergency services. Understanding income tax matters because it explains why your take-home pay is less than your gross pay. It also helps you read paychecks, compare jobs, and plan a budget.
Key Facts
- Take-home pay = gross income - pre-tax deductions - taxes - after-tax deductions
- Taxable income = gross income - pre-tax deductions - adjustments - deductions
- Progressive tax systems use higher tax rates only on income within higher brackets, not on all income.
- Marginal tax rate = the tax rate paid on your next dollar of taxable income
- Effective tax rate = total tax paid ÷ total income
- Sample: If gross pay is 100, taxes are 30, take-home pay = $750
Vocabulary
- Gross income
- Gross income is the total money earned before taxes and deductions are taken out.
- Pre-tax deduction
- A pre-tax deduction is money subtracted from gross income before income tax is calculated, such as some retirement or health insurance contributions.
- Taxable income
- Taxable income is the amount of income used to calculate how much income tax is owed.
- Marginal tax rate
- The marginal tax rate is the rate applied to the next dollar of taxable income.
- Effective tax rate
- The effective tax rate is the average tax rate found by dividing total tax paid by total income.
Common Mistakes to Avoid
- Thinking a higher tax bracket taxes all your income at the higher rate. In a progressive system, only the income inside that bracket is taxed at that bracket's rate.
- Confusing gross pay with take-home pay. Gross pay is what you earn before deductions, while take-home pay is what actually goes into your bank account.
- Ignoring pre-tax deductions when finding taxable income. Pre-tax deductions usually lower the amount of income that is taxed.
- Using marginal tax rate as the same thing as effective tax rate. The marginal rate applies to the next dollar earned, while the effective rate is the average rate across income.
Practice Questions
- 1 A student earns 50 in pre-tax deductions, 15 in after-tax deductions. What is their take-home pay?
- 2 A simple tax system charges 10% on the first 10,000. If someone has $14,000 in taxable income, how much income tax do they owe, and what is their effective tax rate?
- 3 Two workers both move into a higher tax bracket after getting raises. Explain why this does not mean all of their income is taxed at the new higher rate.