What Is Form 1099-INT?

Form 1099-INT is an official tax document used in the United States to report interest income earned during the tax year. The Internal Revenue Service (IRS) requires financial institutions, such as banks, credit unions, brokerage firms, and other entities that pay interest, to issue this form to taxpayers who have earned $10 or more in interest income. It serves both as a record for the taxpayer and as a means for the IRS to track unreported income.

Interest income reported on Form 1099-INT can originate from various sources, including savings accounts, certificates of deposit (CDs), U.S. Treasury obligations, and bond interest. This form plays a crucial role in tax compliance and must be included when filing federal income tax returns.

Purpose and Scope

The purpose of Form 1099-INT is to document interest income received by an individual or entity. It ensures that the taxpayer accounts for all taxable and tax-exempt interest received during the calendar year. Because interest income is generally taxable, the IRS uses Form 1099-INT to match income reported by payers with what taxpayers declare on their returns.

The form is also used to report related tax information such as federal income tax withheld under backup withholding rules and foreign tax paid on foreign income. Some types of interest may be exempt from federal income tax — such as municipal bond interest — but must still be reported to maintain accurate income records.

Structure and Key Boxes

Form 1099-INT is divided into several boxes, each representing a specific category of income or withholding. Some of the most commonly used boxes include:

• Box 1: Interest income. This reflects the total taxable interest earned, excluding U.S. savings bond interest or tax-exempt interest.
• Box 2: Early withdrawal penalty. This shows any penalty imposed for withdrawing funds from time deposits like CDs before maturity.
• Box 3: Interest on U.S. Savings Bonds and Treasury obligations. This includes interest from instruments like Series EE or Series I bonds and Treasury notes.
• Box 4: Federal income tax withheld. Any amount withheld under backup withholding rules is reported here.
• Box 8: Tax-exempt interest. Interest from municipal bonds or similar tax-exempt investments is shown here, although it is not included in federal taxable income.
• Box 9: Specified private activity bond interest, which may be subject to the Alternative Minimum Tax (AMT).

Other boxes may include information such as market discount, bond premium, foreign tax paid, and country of origin for foreign-sourced interest. Each box provides necessary data that must be reviewed and, in many cases, reported on the appropriate lines of IRS Form 1040.

Who Must File and Receive the Form

Banks, mutual fund companies, brokerages, and any other institution that pays interest to U.S. taxpayers are required to file Form 1099-INT with the IRS and furnish a copy to the recipient. The payer must submit the form if the total interest paid to an individual or business equals or exceeds $10 in a calendar year. The filing requirement also applies to individuals and organizations that pay interest in the course of a trade or business, not merely personal transactions.

Recipients of Form 1099-INT may include individuals, partnerships, corporations, trusts, and estates. The form must be issued to each taxpayer by January 31 of the year following the tax year in which the interest was paid. Payers must also file copies with the IRS, typically by February 28 if filing by paper or March 31 if filing electronically.

Reporting Interest Income on Tax Returns

Interest income reported on Form 1099-INT is typically entered on the taxpayer's Form 1040, Schedule B, if total taxable interest exceeds $1,500 or if other conditions apply. Taxpayers must also include interest from Series EE and I savings bonds, whether it is taxable or tax-deferred. Tax-exempt interest from municipal bonds must be reported on Form 1040, even though it is not subject to federal income tax, to ensure full disclosure and compliance.

Backup withholding, shown in Box 4, must also be reported and credited against any tax due. Taxpayers should check the accuracy of the amounts listed on the form and reconcile them with their own records, particularly in cases where multiple accounts or issuers are involved.

Compliance and Errors

Taxpayers are legally required to include all interest income received, even if a Form 1099-INT was not issued. In some cases, institutions may fail to issue a form due to thresholds or administrative oversight. However, this does not relieve the taxpayer of the responsibility to report the income.

If there is a discrepancy or error in a Form 1099-INT — such as incorrect amounts, missing taxpayer identification number (TIN), or misreported interest categories — the recipient should contact the issuer to request a corrected version. Inaccurate forms may cause delays or trigger audits if left unresolved.

The Bottom Line

Form 1099-INT is a critical document in the U.S. tax reporting system for individuals and businesses that earn interest income. It standardizes the process of documenting interest payments from financial institutions and ensures taxpayers meet their reporting obligations. Taxpayers should carefully review the information on the form, use it when filing their tax returns, and retain it for their records. Understanding how to interpret Form 1099-INT helps avoid filing errors and promotes full compliance with IRS regulations.