A Schedule B is an IRS tax form you attach to Form 1040 or 1040-SR to itemize your taxable interest and ordinary dividend income. You need it when either your interest or your ordinary dividends for the year exceed $1,500, when you received interest on a mortgage you extended to a home buyer, or when you had a foreign financial account or a connection to a foreign trust.1Internal Revenue Service. About Schedule B (Form 1040), Interest and Ordinary Dividends The form has three parts, one for each of those situations, and most filers can finish it in a few minutes once their 1099s are in hand.
When You Have to File Schedule B
Three separate situations pull you into Schedule B. Any one of them is enough.
The most common is the dollar threshold. If your taxable interest for the year tops $1,500, or your ordinary dividends top $1,500, you file the schedule.2Internal Revenue Service. Instructions for Schedule B (Form 1040) That $1,500 is not a per-account cap. Add up every interest payment across every bank, credit union, and brokerage, then do the same for dividends. If either total crosses the line, the schedule is required.
The second trigger is seller-financed mortgage interest. If you lent someone money to buy a home they use as a personal residence and they paid you interest, Schedule B is required no matter how small the amount.1Internal Revenue Service. About Schedule B (Form 1040), Interest and Ordinary Dividends Part I collects the buyer’s name, address, and Social Security number so the IRS can match what the borrower deducts against what you report.
The third trigger is foreign. If you had a financial interest in or signature authority over any account outside the United States, or you received a distribution from or were the grantor of a foreign trust, you complete Part III.1Internal Revenue Service. About Schedule B (Form 1040), Interest and Ordinary Dividends This applies even when the account produced zero interest.
What Each Part of the Form Does
Schedule B has three parts, and each one answers a different question.
Part I: Interest
List the payer’s name and the interest amount for each source. The figures come from box 1 of every Form 1099-INT you received, plus any original issue discount reported on Form 1099-OID.3Internal Revenue Service. About Form 1099-INT, Interest Income4Internal Revenue Service. Guide to Original Issue Discount (OID) Instruments Add them, apply any adjustments (nominee distributions, accrued interest paid to a bond seller, or the Series EE and Series I education savings bond exclusion from Form 8815), and put the final total on line 4.2Internal Revenue Service. Instructions for Schedule B (Form 1040) That number carries to Form 1040, line 2b.
Part II: Ordinary Dividends
List each payer and the dividend amount from box 1a of each Form 1099-DIV, then total them on line 6 and carry that number to Form 1040, line 3b.5Internal Revenue Service. 1040 (2025) Instructions One point of confusion: qualified dividends are already included in the ordinary dividend figure on Schedule B. You don’t split them here. The split between qualified and ordinary happens on Form 1040 itself, on lines 3a and 3b.
Part III: Foreign Accounts and Trusts
Part III is a set of yes-or-no questions. Did you have a financial interest in or signature authority over any account in a foreign country? Did you receive a distribution from, or were you the grantor of, a foreign trust?1Internal Revenue Service. About Schedule B (Form 1040), Interest and Ordinary Dividends If yes, you list the country and follow through with the separate reporting described below.
Tax-Exempt Interest Doesn’t Belong on Schedule B
Interest from municipal bonds and other tax-exempt sources is not reported on Schedule B. It goes directly on Form 1040 or 1040-SR, line 2a.2Internal Revenue Service. Instructions for Schedule B (Form 1040) Look for the amount in box 8 of Form 1099-INT, or box 12 of Form 1099-DIV if it came from a tax-exempt mutual fund. One caveat: if you bought a tax-exempt bond at a market discount and later sold or redeemed it, the discount portion is taxable interest and does belong on Schedule B.
Foreign Accounts Trigger More Than Schedule B
Saying yes in Part III often sets off additional filings that live outside your tax return.
If the combined value of all your foreign accounts topped $10,000 at any point during the year, you also owe FinCEN Form 114, known as the FBAR, filed separately with the Treasury Department’s Financial Crimes Enforcement Network.6Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR) That $10,000 is an aggregate across all foreign accounts, not per account.7Internal Revenue Service. Comparison of Form 8938 and FBAR Requirements The FBAR is due April 15, with an automatic six-month extension to October 15 if you miss the initial date.8FinCEN. FBAR Filing Requirement for Certain Financial Professionals
Larger foreign holdings can also require Form 8938 under the Foreign Account Tax Compliance Act. For single filers living in the United States, Form 8938 kicks in when foreign financial assets exceed $50,000 on the last day of the tax year or $75,000 at any point during the year; joint filers get $100,000 and $150,000, respectively.9Internal Revenue Service. Do I Need to File Form 8938, Statement of Specified Foreign Financial Assets? Filers living abroad have higher thresholds: $200,000 and $300,000 for single filers, $400,000 and $600,000 for joint filers. Form 8938 attaches to your tax return; the FBAR goes to FinCEN electronically. Filing one does not excuse you from the other.
What Happens If You Skip It
Leaving Schedule B off a return that needs it, or reporting less than your 1099s show, tends to surface quickly. The IRS receives copies of every 1099-INT and 1099-DIV your financial institutions send you, and its automated matching system flags mismatches.
The standard penalty for underreporting is the accuracy-related penalty of 20% of the underpaid tax. Leaving off income that appeared on an information return is treated as negligence.10Internal Revenue Service. Accuracy-Related Penalty Interest runs on top of that from the original due date. If the IRS determines the underreporting was intentional, the civil fraud penalty rises to 75% of the underpaid tax attributable to fraud.11Office of the Law Revision Counsel. 26 U.S. Code 6663 – Imposition of Fraud Penalty When the underreported income involves undisclosed foreign financial assets, a separate 40% penalty applies to that portion.12Internal Revenue Service. Section 10 – Penalties and Interest Provisions
Foreign account penalties are their own category. Failing to file the FBAR can produce civil penalties even when no extra tax was owed on the account, and willful violations carry substantially higher exposure. That’s why answering Part III honestly matters even when the account earns almost nothing.
Fixing an Omission After Filing
If you already filed and then realized you should have included Schedule B, file Form 1040-X to amend. Attach the completed Schedule B and an updated Form 1040 showing the corrected interest and dividend totals.13Internal Revenue Service. Instructions for Form 1040-X Amended U.S. Individual Income Tax Return In Part II of Form 1040-X, describe the change in plain language, such as “Adding Schedule B to report interest and dividend income omitted from original return.”
You can e-file Form 1040-X for the current tax year and the two prior years. On paper amendments, place new or corrected schedules behind the updated Form 1040. Amending before the IRS contacts you about the discrepancy generally helps reduce or avoid penalties, so acting quickly once you spot the error is worth doing.