5.1 Taxes, Net Income, and Budgeting

How This Topic Fits the Course

Unit 5 turns the tools of the first four units on a single household. It is not assessed on the AP Business with Personal Finance Exam, which covers Units 1 through 4, so treat this page as course content and personal money learning rather than test preparation. The unit supports the Financial Advisor Project. Topic 5.1 is its foundation, because every plan here starts from a number an employer actually deposits, not the number printed on a job offer.

What a Pay Stub Records

A pay stub is the receipt an employer issues for one pay period, and it records three quantities in order: gross income, the deductions removed from it, and net income. Gross income is everything earned during the period before anything is taken out. The compensation scheme decides it: a yearly salary split across pay periods, an hourly rate multiplied by the hours actually worked, a fixed sum set by contract for one defined job, or some other agreed arrangement.

Mandatory deductions come out first, because federal, state, or local law requires them and the employer must withhold the money and remit it. Four lines are typical: federal income tax withholding, Social Security, Medicare, and state income tax where a state charges one. The two payroll lines come out at fixed statutory percentages of gross pay, and the employer pays a matching share of both.

Voluntary deductions form a second block: amounts the employee elects to route into employer sponsored benefits: retirement savings, union dues, life cover, a savings plan for health or dependent care, and the health premium itself. A seasonal role with no benefits shows those lines at zero. Some are pretax deductions, meaning the income sent there is never counted as taxable income. That lowers the tax bill while funding the benefit, a built in reason to save.

Net income, also called net pay, is what remains once every deduction has been subtracted, and it can sit far below gross. The gross above loses eighty five dollars and eighty four cents to four mandatory lines and arrives as four hundred seventy four dollars and sixteen cents, about fifteen percent lighter. Net is the only figure a budget may be built on.

Framework references: 5.1.C.1, 5.1.C.2, 5.1.C.3, 5.1.C.4, 5.1.C.5, 5.1.C.6.

The Taxes Individuals Pay

Individuals pay taxes to federal, state, and local governments, and both the kinds and the amounts vary by state. Five categories cover nearly everything a household meets.

Income taxes are a percentage of income paid to a government. For employees, the employer withholds part of every paycheck and pays it in; the household then files an annual income tax return to pay any remainder or reclaim anything overpaid. Nobody stands in the middle for a self-employed worker, who files and pays that tax directly.Payroll taxes are withheld the same way but fund specific government insurance programs rather than general spending: Social Security, Medicare, Medicaid, and unemployment benefits. Employers are responsible for half, while self-employed and contract workers owe both halves, which is what a self-employment tax collects.

Sales taxes are charged on the sale price of an item and collected by the business making the sale, which submits the money to the government. A cashier handles that money on every transaction without ever owning a cent of it. Property taxes are charged against what a person owns and what it is worth: land and houses in every state, and vehicles in some, billed annually, semi-annually, or monthly. Capital gains taxes fall on the profit when an asset is sold above what was paid for it, and although they are reported with the annual return, the rate charged is usually below the rate on ordinary earnings.

Framework references: 5.1.A.1, 5.1.A.2, 5.1.A.3, 5.1.A.4, 5.1.A.5, 5.1.A.6.

Withholding, the Return, and the Refund

Withholding is a prepayment, not a final bill, and that distinction explains most of what confuses people about filing season. The table an employer uses reads the current paycheck as though it repeated all year, so a twelve week summer at five hundred sixty dollars a week is read as a twenty nine thousand one hundred twenty dollar year.

The real year rarely cooperates. Twenty one spring weeks at one hundred fifty six dollars, twelve summer weeks at five hundred sixty, and seventeen fall weeks at two hundred fifty two add to $14,280, which lands under the standard deduction. Taxable income and federal tax owed both round to zero, so the $348 withheld across the summer prepaid a bill that never arrived, and filing the return brings it back as a refund.

Framework references: 5.1.A.2, 5.1.B.1.

Why Households Pay Different Amounts

Two workers with the same job title can owe very different federal income tax. Three levers account for almost all of the spread.

• Progressive rates. The federal income tax, and some state income taxes, charge higher rates on higher incomes, so the marginal tax rate on the last dollar earned climbs as income climbs.
• Tax deductions. A deduction lowers taxable income before any rate touches it: mortgage interest, retirement contributions, the value of charitable donations, state and local taxes already paid, and some medical expenses.
• Tax credits. A credit skips the middle step and subtracts straight from tax owed, which makes a dollar of credit worth more than a dollar of deduction. Examples include a child tax credit, a child or dependent care credit, an education credit, and credits attached to specific purchases.

Income sets the rate; the rest of a household's life decides which deductions and credits apply. Framework references: 5.1.B.1, 5.1.B.2, 5.1.B.3, 5.1.B.4.

Building a Budget on Net Income

A budget converts a stub into a plan. It starts from expected net pay for the period and assigns every dollar to saving, spending, or debt repayment before the period begins. Four weekly checks of $474.16 give a monthly planning figure of $1,896.64, and planning on an even $1,896 leaves the change in checking.

Budget lines fall into recognizable kinds. Needs are what living requires and wants improve life without being required. A fixed expense stays about the same each month, such as a phone share or an insurance premium, while a variable expense moves with behavior, such as food or fuel. Everything optional counts as discretionary spending, the first line a plan flexes when another has to grow.

Two lines earn their own names. The savings rate is the share of income routed into saving, and automating that transfer on payday is what lets a large rate survive an ordinary month. The emergency fund holds money for costs nobody scheduled, and it is usually seeded by whatever a plan deliberately leaves unassigned; sweeping that buffer into savings at month end starts the fund.

Budgets are plans, and plans change when facts change. Once the car is bought, its funding line has no job, so a disciplined plan redirects it on purpose rather than letting it drift into spending. Every obligation stays named until it is gone. Framework references: 5.1.C.1, 5.1.C.6.