Tax Basics & Filing

The income ranges in the progressive federal tax system, where your income is taxed in layers with different portions taxed at different rates. Moving into a higher bracket does not tax all your income at that rate, only the dollars above the threshold. This is why your marginal rate (the rate on your last dollar) is usually higher than your effective rate (the average across your total taxable income).

The portion of your total income that the IRS considers subject to taxation, calculated by subtracting allowable deductions from your gross income. It includes not just wages but also business earnings, investment income, rental income, and sometimes government benefits. Once determined, it is the figure used to calculate how much you owe based on your tax bracket and marginal rate.

The Wage and Tax Statement, a document your employer provides that reports your annual earnings and the taxes withheld from your paychecks during the year. Employers must send it by January 31st, and it details gross income, taxable income, and amounts withheld for federal income tax, Social Security, and Medicare. Employees receive one, while freelancers and independent contractors instead get 1099 forms.

A tax form businesses use to report income earned by individuals who aren’t employees, such as freelancers, independent contractors, and the self-employed. You typically receive one if you were paid $600 or more for services in a tax year, and it reports that non-employment income to the IRS. There are several types (like 1099-NEC, 1099-MISC, 1099-INT, and 1099-DIV) depending on the kind of income reported.

The standard form individual taxpayers use to file their annual income tax return with the IRS. It summarizes all your income, the taxes you owe, deductions you are eligible for, and credits you can claim, serving as the foundation for calculating your tax liability and any refund. It comes in several versions, including 1040-SR for seniors, 1040-NR for non-resident aliens, and 1040-X for amending a prior return.

A form submitted to the government to report your income, expenses, and other financial details in order to determine how much tax you owe or the refund you are entitled to. It brings together your income, deductions, and tax credits to settle your annual obligation with the government. Beyond compliance, it can also serve as proof of financial standing when applying for loans, rentals, or financial aid.

A tax imposed by a state government on income earned by individuals, and in some cases estates or trusts. Because each state writes its own rules, systems vary widely: some states have no broad individual income tax, others use a single flat rate, and many apply graduated brackets that rise with income. This is why two people with the same income can owe very different amounts depending on where they live and work.