Concepts to Know: Individual Taxation

Taxes can feel overwhelming, but once you understand the structure behind them, they start to make sense. Below is a breakdown of some of the most important individual tax concepts to know.

Why Do We Have Taxes?

At the most basic level, taxes serve two purposes. First, they raise money to fund government operations like national defense, infrastructure, education, and public services. Second, they encourage or discourage certain behaviors. For example, tax credits may encourage buying electric vehicles, while excise taxes on tobacco discourage smoking.

Types of Taxes You Should Know

There are many types of taxes beyond just income tax.

Ad valorem taxes are based on value. Property tax is the most common example. The more your property is worth, the more you pay.

Excise taxes are imposed on specific goods like fuel, alcohol, and tobacco.

Sales tax is charged when goods are sold. A use tax applies when you purchase something outside your state but use it in your home state.

Severance taxes apply when natural resources like oil or gas are extracted.

Estate taxes are levied on property owned at death. Some states also have inheritance taxes, which tax the person receiving the inheritance. Texas does not have one.

Gift taxes apply to transfers made during life. Connecticut has a state gift tax, but federally there is a lifetime exemption of over 14 million dollars. Only gifts exceeding that lifetime limit trigger tax, and the giver pays it.

Income tax applies to individuals, corporations, and certain trusts.

Employment taxes include Social Security and Medicare under FICA. These are split between employer and employee. Self employed individuals pay both halves through self employment tax.

Individual income taxes and payroll taxes make up the majority of federal revenue. Corporate income taxes account for a relatively small portion.

The Legal Foundation of Tax Law

The authority to tax income comes from the Sixteenth Amendment to the United States Constitution.

Federal tax law is primarily found in the Internal Revenue Code, often called the IRC. It was originally enacted in 1986 and is updated frequently by Congress.

Tax law comes from several sources. Statutory law includes the Internal Revenue Code itself. Administrative guidance comes from the IRS in the form of Treasury Regulations, revenue rulings, and private letter rulings. Judicial sources include court decisions from the Tax Court, Courts of Appeals, and the Supreme Court.

If a taxpayer disagrees with an IRS assessment, they can challenge it in court. Published court opinions become precedent, meaning they guide future cases.

Filing Status and Basic Filing Rules

Your filing status is determined as of the last day of the tax year. Common statuses include single, married filing jointly, married filing separately, head of household, and qualifying surviving spouse.

Head of household generally requires that you are unmarried and support a qualifying child or relative who lived with you more than half the year and did not provide more than half of their own support.

Even if you owe no tax, it is smart to file a return. The statute of limitations is generally three years, and filing starts that clock.

Most individuals file Form 1040. Returns are typically due April 15. You can request a six month extension using Form 4868, but you still must estimate and pay any tax owed by the original due date to avoid penalties.

Community Property Rules

Texas is a community property state. That means most income earned during marriage is considered jointly owned, regardless of who earned it.

Separate property includes assets owned before marriage or received as gifts or inheritances. Community property generally includes income earned during marriage. Each spouse owns half of community property.

Understanding Income

Economic income includes unrealized gains, like when your stock increases in value even if you have not sold it.

Accounting income follows financial reporting rules under GAAP.

Tax income follows tax law rules, which differ from accounting rules. Some differences are temporary, like accelerated tax depreciation. Others are permanent, like tax exempt income.

Cash basis taxpayers recognize income when they receive it. Accrual basis taxpayers recognize income when it is earned.

The constructive receipt doctrine prevents cash basis taxpayers from delaying income recognition if they have control over the funds.

You also cannot shift tax liability. Income from services is taxed to the person who performed the work. Income from property is taxed to the owner.

Recovery of capital means you are not taxed on the portion of sale proceeds that simply returns your original investment.

What Is Not Taxable

Some items are excluded from income.

Gifts and inheritances received are not taxable to the recipient.

Life insurance death benefits are generally not taxable.

Child support is not taxable. For divorces after 2018, alimony is not deductible by the payer and not taxable to the recipient.

Scholarships used for tuition, fees, and books are tax free, but amounts used for room and board are taxable.

Certain lawsuit damages for physical injury are not taxable. Lost wages and punitive damages usually are taxable.

Up to 250,000 dollars of gain on the sale of a primary residence, or 500,000 for married couples filing jointly, may be excluded if ownership and use tests are met.

Adjusted Gross Income and Deductions

Adjusted Gross Income, or AGI, is a key number on your return.

Above the line deductions reduce AGI directly.

Below the line deductions are itemized deductions such as medical expenses, state and local taxes, mortgage interest, and charitable contributions.

Medical expenses are deductible only to the extent they exceed 7.5 percent of AGI.

State and local tax deductions are capped at 10,000 dollars.

Mortgage interest is deductible on up to 750,000 dollars of qualifying home acquisition debt for newer loans.

You can choose either the standard deduction or itemized deductions, whichever is larger.

Tax Credits

Credits are more powerful than deductions because they reduce tax dollar for dollar.

Nonrefundable credits reduce your tax to zero but no further. Examples include the Child Tax Credit and the Lifetime Learning Credit.

Refundable credits can generate a refund even if your tax is reduced to zero. The Earned Income Credit is a common example.

There are also additional taxes to be aware of, such as the Alternative Minimum Tax for higher income individuals, the Net Investment Income Tax for certain high earners with investment income, and self employment tax.

Estimated Taxes

If you do not have enough withholding, you may need to make quarterly estimated payments. Missing these payments can result in penalties.

Sole Proprietorships and Schedule C

If you are self employed, you report business income and expenses on Schedule C.

You can deduct expenses that are ordinary and necessary for your business.

Vehicle expenses can be deducted using either actual expenses or the standard mileage rate.

Home office deductions require exclusive and regular use of a space as your principal place of business.

Depreciation and Amortization

Depreciation allows you to recover the cost of business assets over time. The timing and method depend on the type of asset.

Section 179 allows you to expense certain assets immediately, subject to limits.

Bonus depreciation allows you to deduct a percentage of an asset’s cost in the first year.

Real property is generally depreciated over longer periods.

Amortization applies to intangible assets like patents and trademarks.

Final Thoughts

Individual taxation is complex, but most rules fall into a few big categories: what counts as income, what you can deduct, what credits are available, and when income must be reported.

Understanding these fundamentals helps you make smarter financial decisions, avoid penalties, and take advantage of opportunities the tax code provides.