What Is 1099-INT

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Last updated: April 12, 2026

Quick Answer: Form 1099-INT is an IRS tax document that reports interest income received from banks, savings accounts, bonds, and other financial sources. Financial institutions must issue this form when interest payments total $10 or more in a calendar year.

Key Facts

Interest income of $10+ must be reported on Form 1099-INT by financial institutions
The form must be filed with the IRS by January 31st of the following tax year
Recipients receive a copy to report the income on their tax returns and calculate tax liability
Different types of interest income appear on specific lines of the 1099-INT form
Backup withholding at 24% may apply if incorrect taxpayer information is provided

Overview

Form 1099-INT is an official IRS tax document issued by financial institutions to report interest income earned by account holders during a calendar year. This form is a critical component of the U.S. tax reporting system, ensuring that all sources of income are properly documented and reported to federal tax authorities. Banks, credit unions, savings institutions, investment firms, and other financial entities are required to issue 1099-INT forms to customers who earn qualifying interest.

The primary purpose of the 1099-INT form is to create an official record of interest payments made throughout the year, which allows both the IRS and the individual recipient to reconcile reported income. When a taxpayer receives interest income, this documentation becomes essential for completing their annual tax return and calculating their total tax liability. Understanding what information appears on this form and how to use it is crucial for accurate tax filing and avoiding discrepancies with IRS records.

How It Works

The 1099-INT reporting process follows specific guidelines established by the IRS to standardize interest income reporting across the financial industry. Financial institutions track interest paid to account holders throughout the calendar year and generate 1099-INT forms that itemize these payments by category and source.

Issuance Threshold: Financial institutions must issue a 1099-INT form when interest income totals $10 or more during the calendar year, though many institutions issue forms for smaller amounts as well.
Reporting Timeline: Issuers must mail copies of the 1099-INT to recipients by January 31st following the tax year in which interest was earned, and simultaneously file copies with the IRS and state tax authorities.
Interest Categories: The form tracks multiple types of interest income on different lines, including savings account interest, certificate of deposit (CD) interest, bond interest, and other forms of investment income.
Taxpayer Information: The form includes the recipient's Social Security Number (SSN) or Employer Identification Number (EIN), allowing the IRS to match reported income with individual tax returns and ensure compliance.
Account Identification: Financial institutions list account numbers and may provide additional details about the source of the interest income to help recipients identify which accounts generated the reported earnings.

Key Details

Form Element	Description	Recipient Action	IRS Use
Box 1: Interest Income	Total interest earned from savings accounts, money market accounts, and similar deposits	Report on tax return Schedule B or Form 1040	Verify income reported by taxpayer
Box 3: US Savings Bond Interest	Interest earned specifically from U.S. Savings Bonds (Series EE, I, or other types)	May be deferred or reported based on election	Track savings bond income separately
Box 4: Federal Income Tax Withheld	Any backup withholding or other federal taxes withheld from interest payments	Use to claim estimated tax payments or refunds	Ensure correct withholding occurred
Box 8: US Savings Bond Interest	Additional interest from bonds where recipient deferred reporting	Report in year bonds redeemed or mature	Track deferred income reporting

When completing your tax return, you must report all 1099-INT interest income received during the tax year, even if you don't receive a form. The IRS receives copies of all 1099-INT forms filed and cross-references them with your filed return, so unreported interest income will likely trigger IRS notices and potential penalties. If you receive multiple 1099-INT forms from different institutions, you must add together all reported interest income and claim the total on your return.

Why It Matters

Tax Compliance: The 1099-INT system enables the IRS to verify that taxpayers accurately report all interest income and maintains a comprehensive record of income sources across the financial system.
Accurate Tax Filing: Recipients must report 1099-INT interest income on their tax returns, which affects tax brackets, eligibility for certain deductions, and overall tax liability for the year.
Backup Withholding: If you provide incorrect information to financial institutions, they may implement backup withholding at 24% on future interest payments, making accurate documentation essential.
Interest Deductions: Certain types of interest paid (such as mortgage interest or student loan interest) may be deductible, and understanding your 1099-INT forms helps identify which interest is income versus expense.
Multi-Account Tracking: Individuals with multiple savings accounts, CDs, or investment accounts receive separate 1099-INT forms from each institution, requiring careful tracking to ensure complete and accurate reporting.

The 1099-INT form plays a vital role in maintaining the integrity of the U.S. tax system by creating official documentation of interest income. Whether you earn interest from a simple savings account or complex investment products, properly understanding and reporting your 1099-INT forms ensures compliance with IRS regulations and helps you file accurate tax returns that reflect your true tax liability and avoid costly penalties or audits.