U.S. · Tax forms
1099-INT box 11, bond premium.
Premium amortization, net or gross interest, and where Treasury and tax-exempt premium go.
Box 11 of Form 1099-INT is the bond premium amortization allocable to the interest paid, for a taxable covered security bought at a premium that is not a U.S. Treasury obligation. If the payer reported a net amount of interest in box 1, box 11 is blank.
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What the instruction says
For a taxable covered security acquired at a premium (other than a U.S. Treasury obligation), the payer enters the bond premium amortization allocable to interest paid during the year, unless it was notified in writing that the holder did not want to amortize premium under section 171. The instructions cite Regulations sections 1.6045-1(n)(5) and 1.6049-9(b).
Gross or net: the payer chooses
The instructions let the payer report either a net amount of interest that already offsets the premium amortization, or a gross amount for both the interest and the amortization. A noncovered security gets only the gross interest.
Worked example from the instructions
A taxpayer receives $20 of taxable interest from a corporate bond and $2 of premium amortization is allocable to it. The payer may report $18 of interest income in box 1 and $0 in box 11, or $20 in box 1 and $2 in box 11. Both are permitted; the second shows the premium separately, so look at box 1 and box 11 together.
The three premium boxes
Box 11 is for taxable non-Treasury bonds, box 12 for Treasury obligations and box 13 for tax-exempt bonds. Each is left blank when the payer reported a net amount in the matching interest box (box 1, box 3, or box 8 or 9).
OID bonds
For a covered security acquired with OID and bond premium, if the payer reports qualified stated interest in box 2 of Form 1099-OID, it must report the premium amortization in box 10 of Form 1099-OID. It may not report that interest on Form 1099-OID and the premium on Form 1099-INT.
Related decoders
More 1099 interest and dividend box pages: 1099-INT box 3, 1099-INT box 10, 1099-INT box 2, 1099-DIV box 2a, 1099-OID box 8. For the 1099-R box 7 codes see the 1099-R distribution codes lookup.
Sources
- Instructions for Forms 1099-INT and 1099-OID (01/2024): the box-by-box section for this form. Read November 2, 2026. The IRS page was last reviewed April 30, 2026.
Edition read: Instructions for Forms 1099-INT and 1099-OID (01/2024). These instructions are continuous use and are updated as needed, so check the current version before relying on a detail. This page summarizes the instructions and does not replace them; the worked example uses made-up figures.
Frequently asked questions
What is box 11 on Form 1099-INT?
Bond premium amortization allocable to interest paid during the year, for a taxable covered security acquired at a premium other than a U.S. Treasury obligation.
Why is my box 11 blank?
The instructions say box 11 is left blank if the payer reported a net amount of interest in box 1. It is also not reported where the payer was told in writing that the holder does not want to amortize premium on a taxable bond.
Can interest be reported net or gross?
Yes. The payer may report net interest that offsets the premium amortization, or gross interest plus the amortization separately. The instructions give $18 net, or $20 and $2, as the example.
Where does premium on a Treasury bond go?
Box 12, bond premium on Treasury obligations, not box 11.
Where does premium on a municipal bond go?
Box 13, bond premium on tax-exempt bond, for a tax-exempt covered security acquired at a premium.
Not tax advice
This page summarizes IRS instructions, mostly written for the people who prepare the form, and is not tax, legal or financial advice. The payer, a CPA or an enrolled agent can confirm what a box means for your return. Everything runs in your browser; nothing you enter is sent anywhere.