What Is Adjusted Gross Income (AGI)?

Adjusted Gross Income (AGI) is a measure of income used by the Internal Revenue Service (IRS) to determine how much of an individual’s earnings are subject to tax. It is calculated by taking total gross income and subtracting eligible adjustments or deductions.

Gross income may include earnings from multiple sources, such as wages, salaries, business income, interest income, dividends, capital gains, and rental income. As a result, AGI serves as an important starting point for calculating taxable income and determining eligibility for various tax benefits.

How Is AGI Calculated?

The calculation follows a straightforward formula:

Gross Income − Eligible Deductions = Adjusted Gross Income (AGI)

Several deductions can reduce gross income before taxes are calculated. Common examples include:

• Retirement account contributions.
• Student loan interest payments.
• Certain self-employed business expenses.
• Health Savings Account (HSA) contributions.
• Alimony payments for qualifying agreements.

Therefore, taxpayers who qualify for these deductions may be able to lower their AGI and reduce their overall tax burden.

Why Is It Important?

The IRS uses this figure as the foundation for calculating taxable income and determining eligibility for many tax-related benefits. In addition, it plays a key role in assessing qualification for credits, deductions, and other tax-saving opportunities.

Your income level may affect eligibility for:

• Child tax credits.
• Education-related tax credits.
• Itemized deductions.
• Retirement contribution deductions.
• Healthcare-related tax benefits.

In many cases, a lower AGI can increase access to valuable tax savings and reduce overall tax liability.

Gross Income vs. Adjusted Gross Income

Although the terms are related, they represent different stages of the tax calculation process.

Gross Income: Total earnings received before deductions or adjustments.

Adjusted Gross Income: The amount that remains after eligible deductions are subtracted from gross income.

Because it reflects allowable adjustments, AGI provides a more accurate picture of taxable income. Consequently, it is one of the most important figures used during tax preparation, financial planning, and annual tax filing.