Ever looked at your first paycheck and wondered why the number was so much smaller than what you thought you'd earn? That gap between what you're paid and what actually lands in your bank account comes down to taxes and deductions. Understanding how taxes work, how to read a pay stub, and how your take-home pay gets calculated is the foundation for building a budget that actually works.

Types of Taxes Individuals Pay

Taxes aren't just one thing. You'll pay different taxes to different levels of government (federal, state, and local), and the mix changes depending on where you live. Someone in Texas pays no state income tax but might pay higher property taxes. Someone in California pays both. Here are the main ones you need to know.

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Income Taxes

Income taxes are a percentage of the money you earn that goes to the government. If you're an employee, your employer withholds part of every paycheck and sends it directly to the IRS (and your state, if applicable). At the end of the year, you file an income tax return to settle up. If too much was withheld, you get a refund. If not enough was withheld, you owe the difference.

Self-employed people (think freelance graphic designers or rideshare drivers) don't have an employer doing this for them. They have to calculate and send in their own income taxes, usually quarterly.

Capital Gains Taxes

A capital gain happens when you sell an investment (like stocks or real estate) for more than you paid for it. Buy a share of Apple for $150, sell it for $200, and that $50 profit is a capital gain. You report capital gains on the same annual tax return as income, but they're usually taxed at a lower rate than regular income, which is why long-term investing can be tax-friendly.

Payroll Taxes

Payroll taxes are separate from income taxes and fund specific government insurance programs. For this course, students should recognize that these programs include Social Security, Medicare, Medicaid, and unemployment benefits:

Social Security (retirement and disability benefits)
Medicare (health insurance for people 65+)
Medicaid (health coverage for low-income individuals)
Unemployment benefits

For employees, these taxes are associated with payroll withholding, and employers pay part of the payroll-tax cost. If you're a regular employee, your employer pays half of these payroll taxes and you pay the other half. But if you're self-employed or a contract worker, you're responsible for paying the full amount yourself. That's a big reason freelancers often owe more in taxes than they expect.

Property Taxes

Property taxes are based on the value of stuff you own, mainly houses, land, and sometimes cars. If your home is valued at $300,000 and your local property tax rate is 1.2%, you'd owe $3,600 a year. You might pay this once a year, twice a year, or monthly (often rolled into a mortgage payment).

Sales Taxes

Sales taxes are added onto the price of things you buy. If you grab a $20 t-shirt in a state with a 7% sales tax, you actually pay $21.40 at the register. The store collects that extra $1.40 and sends it to the government. Sales tax rates vary by state and city, and some states (like Oregon and Delaware) don't have one at all.

Why People Pay Different Amounts of Federal Income Tax

Two people earning the exact same salary can end up owing very different amounts in federal income tax. That comes down to three things: income level, tax deductions, and tax credits.

Progressive Tax Rates

The U.S. federal income tax is progressive, which means higher incomes are taxed at higher rates. The income gets sorted into brackets, and each chunk is taxed at a different rate. Someone earning $40,000 might have most of their income taxed at 12%, while someone earning $400,000 has their top dollars taxed at 35% or more. Some states use progressive income tax too, while others use a flat rate or none at all.

Tax Deductions

Tax deductions reduce your taxable income, which is the amount of income the government actually applies tax rates to. Lower taxable income means lower taxes owed. Common deductions include:

Interest paid on a home mortgage
Contributions to certain retirement accounts (like a traditional 401(k) or IRA)
Charitable donations
State and local taxes paid (up to a limit)
Some medical expenses

If you earn $60,000 and qualify for $10,000 in deductions, you're only taxed on $50,000.

Tax Credits

Tax credits are even more powerful than deductions because they directly reduce the tax you owe, dollar for dollar. A $1,000 tax credit cuts your tax bill by $1,000, period. Examples include:

The child tax credit (for parents with dependent kids)
The child or dependent care tax credit (for childcare costs)
Education tax credits (for college tuition and related expenses)
Credits for specific purchases (like electric vehicles or energy-efficient home upgrades)

Quick way to remember the difference: deductions reduce the income that gets taxed; credits reduce the actual tax bill.

Reading a Pay Stub

Your pay stub is the breakdown attached to your paycheck (or available through your employer's payroll system) that shows exactly where your money is going. Every pay stub has three big parts: gross income, deductions, and net income.

Gross Income

Gross income (or gross pay) is the total amount you earned during the pay period, before anything is taken out. How it's calculated depends on how you're paid:

Annual salary: divided into pay periods. A $52,000 salary paid weekly =$ 1,000 gross per check.
Hourly: hours worked times your hourly rate. 40 hours at $18/hr =$ 720 gross.
Contracted amount: a flat fee for a specific job or project.
Other schemes: commissions, tips, bonuses, etc.

Mandatory Deductions

Mandatory deductions are required by federal, state, and/or local law, and an employer must withhold them from an employee's pay. These deductions typically include income taxes and specific payroll taxes. Examples shown on a pay stub may include:

Federal income tax
State and local income tax (if applicable)
Social Security tax
Medicare tax

Depending on the state and payroll system, other required withholdings or payroll-tax-related items may also appear. You don't get a choice about these. They come out of every paycheck automatically.

Voluntary Deductions

Voluntary deductions are things you choose to have taken out of your paycheck, usually for employer-sponsored benefits. Examples:

Health insurance premiums
Health savings account (HSA) or dependent care savings contributions
Life insurance premiums
Retirement savings (like 401(k) contributions)
Union dues

These aren't required, but a lot of people sign up for them because the benefits are valuable and sometimes cheaper through an employer than buying on your own.

Pretax Deductions

Some voluntary deductions are pretax deductions, meaning the money set aside isn't counted as part of your taxable income. This is a big deal for saving.

Here's an example. Say you earn $1,000 in a pay period and contribute $100 to a traditional 401(k). That $100 is pretax, so only $900 gets taxed. You're saving for retirement and lowering your tax bill at the same time. Health insurance premiums and HSA contributions are often pretax too.

Net Income

Net income (or net pay) is what's left after every deduction comes out. This is the number that actually hits your bank account. It can be a lot smaller than gross income, especially when you add up taxes plus benefits.

Here's a simple walkthrough of a pay stub for someone earning $1,500 gross per pay period:

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Gross Income:                  $1,500.00

Pretax Deductions:
  401(k) contribution           -$75.00
  Health insurance premium      -$50.00

Taxable Income:                $1,375.00

Mandatory Deductions:
  Federal income tax           -$165.00
  State income tax              -$55.00
  Social Security (6.2%)        -$85.25
  Medicare (1.45%)              -$19.94

Other Voluntary Deductions:
  Life insurance                -$10.00

Net Income (take-home pay):  $1,039.81

Notice how the 401(k) and health insurance came out before taxes were calculated, so they shrunk the taxable income. That's the pretax advantage in action.

Putting It Together for Budgeting

Once you understand what's actually landing in your bank account (net income, not gross), you can build a real budget. Plenty of people make the mistake of planning expenses around their salary number and then come up short because they forgot about taxes and deductions. The pay stub tells you the truth. Knowing how taxes, deductions, and credits work also helps you make smarter long-term moves: contributing to a retirement account lowers your taxes now, claiming credits you qualify for cuts your bill, and choosing where to live affects how much you'll pay in state and property taxes. Every one of these decisions ripples through your budget for years.

Vocabulary

The following words are mentioned explicitly in the College Board Course and Exam Description for this topic.

Term	Definition
annual salary	A fixed compensation scheme where employees receive a set amount of pay distributed over a full year, regardless of hours worked.
capital gain	The profit earned when an individual sells an investment or asset for more than its original purchase price.
capital gains taxes	Taxes paid on the profit earned when an individual sells an investment or asset, typically at a lower rate than income tax.
employer-sponsored benefits	Benefits offered by an employer that employees can voluntarily choose to participate in, such as health insurance, retirement plans, and life insurance.
federal income tax	A tax imposed by the U.S. federal government on individual and household income, with rates that vary based on income level and other factors.
gross income	The total amount of income earned during a pay period before any deductions are removed.
income tax return	An annual filing submitted by individuals or households to report income and either pay remaining taxes owed or receive a refund.
income taxes	Mandatory taxes withheld from an employee's gross income by federal, state, and/or local governments.
mandatory deductions	Deductions from gross income that are required by federal, state, and/or local laws and must be withheld by an employer, typically including income taxes and payroll taxes.
Medicaid	A federal government insurance program funded by payroll taxes that provides health coverage for low-income individuals and families.
Medicare	A federal government insurance program funded by payroll taxes that provides health coverage for eligible individuals.
net income	The profit a business earns after subtracting all expenses from revenue, which can be positive even when cash flow is negative.
pay period	The time interval (such as weekly, biweekly, or monthly) for which an employee's compensation is calculated and paid.
pay stub	A document provided by an employer that shows an employee's gross income, deductions, and net income for a pay period.
payroll taxes	Taxes withheld from employee paychecks that fund specific government insurance programs such as Social Security, Medicare, Medicaid, and unemployment benefits.
pretax deductions	Deductions from income that reduce the amount of income subject to taxation, thereby lowering an individual's tax liability.
progressive tax	A tax system in which individuals and households earning higher incomes pay higher tax rates than those earning lower incomes.
property taxes	Taxes based on the assessed value of an individual's property, including houses, land, and vehicles.
sales taxes	Taxes based on the sales price of an item, typically collected by the business selling the item and submitted to the government.
self-employed	An individual who works for themselves rather than as an employee, and is responsible for paying their own income taxes and full payroll taxes.
Social Security	A federal government insurance program funded by payroll taxes that provides retirement, disability, and survivor benefits.
tax credits	Direct reductions in the amount of taxes owed, such as child tax credits or education tax credits, that provide a dollar-for-dollar reduction in tax liability.
tax deductions	Amounts subtracted from gross income that reduce taxable income and the total taxes owed, such as mortgage interest, retirement contributions, or charitable donations.
tax liability	The total amount of income tax an individual owes to the government.
tax rate	The percentage of income or taxable income that must be paid as taxes.
tax withholding	The process by which an employer deducts taxes from an employee's paycheck and pays them directly to the government.
taxable income	The portion of income subject to taxation after deductions have been subtracted from gross income.
unemployment benefits	Government insurance payments funded by payroll taxes provided to individuals who are temporarily unemployed.
voluntary deductions	Deductions from gross income that an individual chooses to set aside for employer-sponsored benefits such as health insurance, retirement savings, and life insurance.