What this line means
All interest income the IRS considers taxable — from bank accounts, CDs, Treasury bonds, and loans you made to others. Tax-exempt interest (municipal bonds) goes on line 2a instead. If your total taxable interest exceeds $1,500, you must also file Schedule B to list each payer.
Does this apply to you?
- You have savings accounts, money market accounts, or CDs at any bank
- You hold Treasury bonds, corporate bonds, or bond funds
- You cashed Series EE or I savings bonds during the year
- You earned interest from a seller-financed mortgage
- You made a personal loan and charged interest
Easy to overlook
Interest from accounts closed during the year Seniors consolidating accounts in retirement often close bank accounts mid-year. The closing bank still issues a 1099-INT for interest earned through the closing date. Filers who closed an account in February frequently forget to include that small 1099-INT. The IRS receives it and matches it against your return. 1 CP2000 pattern — unreported interest from closed accounts
Original issue discount on long-held bonds If you purchased bonds at a discount years ago, a portion of the discount is treated as interest income each year — called original issue discount (OID). This appears on Form 1099-OID, not 1099-INT. Retirees holding bonds bought decades ago sometimes miss this separate reporting requirement. 2 IRS Publication 550 — Investment Income and Expenses
Watch out for this
Confusing tax-exempt interest with taxable interest. Municipal bond interest goes on line 2a, not line 2b. Putting muni bond interest on line 2b inflates your taxable income and increases the portion of Social Security benefits subject to tax — a double penalty that hits seniors especially hard.
Footnotes
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IRS CP2000 Notice, Automated Underreporter Program, Interest Income Matching. https://www.irs.gov/individuals/understanding-your-cp2000-notice ↩
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IRS Publication 550, Investment Income and Expenses, Original Issue Discount. https://www.irs.gov/pub/irs-pdf/p550.pdf ↩