Where Does OID Go on Your Tax Return: Line 2b and Schedule B

Original issue discount from a taxable bond goes on Line 2b of Form 1040, the same line that captures all your other taxable interest. If your total taxable interest from every source is more than $1,500, or you need to report a different OID figure than the one on your 1099-OID, you also fill out Schedule B and carry the total back to Line 2b. Tax-exempt OID from municipal bonds is reported separately, on Line 2a.

Line 2b of Form 1040

Federal law requires you to include OID in gross income as it accrues each year, whether or not you received any cash.¹ The amount to use is Box 1 of Form 1099-OID, which your broker or the issuer sends after year end. Add that to any ordinary interest from your 1099-INT forms, and put the combined figure on Line 2b.

If your total taxable interest across every source stays at $1,500 or below, that’s the end of it. No schedule, no itemization. The IRS still gets a copy of your 1099-OID, so the number on Line 2b needs to reconcile with what’s been reported for you.²

When Schedule B Is Required

Schedule B becomes mandatory in two situations: your combined taxable interest tops $1,500, or you’re reporting a different OID amount than what your 1099-OID shows.³

You fill out Part I by listing each payer and the amount from each form. If the 1099-OID came through a brokerage, the brokerage is the payer, and you enter the total interest shown on the form.⁴ After listing every source, total them on line 4 and carry that number back to Line 2b on Form 1040. The IRS matches your entries against what banks and brokerages reported, so even small discrepancies can produce a notice.

Reporting a Different Amount Than the 1099-OID Shows

The number on your 1099-OID isn’t always the number you owe tax on. Three situations come up most often, and each is handled on Schedule B rather than by just writing in a smaller figure and hoping the IRS follows along.

Acquisition Premium

If you bought an OID bond for more than its original issue price but less than face value, you paid an acquisition premium, which reduces the OID you include in income. Some brokers report the reduced OID directly in Box 1; others put the full OID in Box 1 and show the offsetting acquisition premium in Box 6.⁵ If your form does the latter, you subtract Box 6 from Box 1 yourself. Publication 1212 walks through the monthly reduction calculation when the adjustment isn’t pre-computed.

Bond Premium

Bond premium is a separate item, appearing when you bought the bond above face value. Box 10 of the 1099-OID shows the amortizable premium for the year. On Schedule B, you note this as an “ABP Adjustment” and subtract it from the interest subtotal.

The OID Adjustment Line

When any of these situations means you owe tax on less OID than the form reports, list the full 1099-OID amount on line 1 of Schedule B, subtotal your interest entries, then write “OID Adjustment” below the subtotal and show the amount you’re taking off. The difference carries to line 4.⁵ This format tells the IRS why your figure doesn’t match the one on file for you, which is what prevents an automated mismatch notice.

The same procedure applies if you bought a bond between accrual dates and the form overstates the OID that belongs to your holding period. Keep your purchase confirmation with your tax records so you can support the adjustment.²

Tax-Exempt OID Goes on Line 2a

OID on municipal bonds and certain other exempt instruments isn’t federally taxable,⁶ but you still report it. It goes on Line 2a of Form 1040, the line for tax-exempt interest. Box 11 of your 1099-OID is where you’ll find the figure.

Line 2a doesn’t add to your tax bill directly, but the number feeds other calculations. The IRS uses tax-exempt interest when determining how much of your Social Security benefits are taxable, because it counts toward “combined income” for that test.⁷ It can also affect eligibility for some income-based credits. Skipping the line doesn’t raise your tax on the OID itself, but it can throw off other pieces of the return.

When You Don’t Need to Report OID Annually

Some discounted debt is outside the annual accrual rules entirely.¹

Short-term instruments that mature in one year or less, such as Treasury bills. You generally report the discount when you sell or the instrument matures.
U.S. savings bonds. Series EE and Series I don’t require annual OID reporting, and most holders defer the interest until redemption.
Personal loans of $10,000 or less between individuals, made outside of a business, unless the loan was structured to avoid tax.

There’s also a de minimis rule for bonds that technically have OID but not much of it. If the total discount is less than 0.25% of the redemption price multiplied by the number of complete years to maturity, it’s treated as zero for annual reporting.⁸ On a 10-year, $1,000 bond, that’s a $25 threshold. Below it, the discount is recognized when you sell or the bond matures, often as capital gain rather than ordinary interest.

Foreign OID Bonds

OID on a bond issued by a foreign entity goes on Line 2b and Schedule B the same way as domestic OID, but the account holding the bond can bring separate disclosure requirements.

If your specified foreign financial assets exceed the thresholds, you file Form 8938 with your return. For single filers living in the U.S., the trigger is $50,000 on the last day of the year or $75,000 at any point during the year; married couples filing jointly get double those amounts. Filers living abroad have higher thresholds: $200,000 and $300,000 for single filers, $400,000 and $600,000 for joint filers.⁹

Separately, if the combined value of your foreign financial accounts exceeds $10,000 at any time during the year, you file an FBAR with FinCEN by April 15, with an automatic extension to October 15. That requirement applies whether or not the account produced taxable income, so a zero-coupon foreign bond in an overseas account counts toward the threshold on its own.¹⁰

What Underreporting Costs

Because the IRS receives every 1099-OID, unreported OID is one of the easiest items for their matching systems to flag. Underreporting without a valid adjustment triggers an accuracy-related penalty of 20% of the resulting underpayment, plus the tax and interest.¹¹ The most reliable way to avoid the notice is to make Line 2b reconcile with your 1099-OID, and to use the OID Adjustment procedure on Schedule B when you have a legitimate reason to report less.

Keeping the Records

The IRS suggests holding tax records for at least three years after filing, which covers the standard audit window. For OID bonds, keep the purchase confirmations, 1099-OID forms, and cost basis records until at least three years after you sell the bond or it matures. Your basis increases each year by the OID you included in income, and without those records you could end up paying tax on the same income twice at sale. If you failed to report more than 25% of your gross income in a year, the IRS can look back six years instead of three.¹²

1
Office of the Law Revision Counsel. 26 USC 1272 – Current Inclusion in Income of Original Issue Discount
2
Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID
3
Internal Revenue Service. Instructions for Schedule B (Form 1040)
4
Internal Revenue Service. Schedule B (Form 1040) 2025 – Interest and Ordinary Dividends
5
Internal Revenue Service. Publication 1212 – Guide to Original Issue Discount (OID) Instruments
6
Office of the Law Revision Counsel. 26 USC 1288 – Treatment of Original Issue Discount on Tax-Exempt Obligations
7
Social Security Administration. Must I Pay Taxes on Social Security Benefits
8
Office of the Law Revision Counsel. 26 US Code 1273 – Determination of Amount of Original Issue Discount
9
Internal Revenue Service. Do I Need to File Form 8938, Statement of Specified Foreign Financial Assets
10
Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR)
11
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
12
Internal Revenue Service. How Long Should I Keep Records