If your business paid $600 or more in interest on a loan to a single lender during the calendar year, you generally need to issue that lender a Form 1099-INT and file a copy with the IRS. The obligation sits with you as the payer, and it only applies when the interest was paid in the course of a trade or business. Loans between individuals for personal reasons, and payments to certain exempt lenders like banks and other corporations, fall outside the rule.
The Two Conditions That Trigger a 1099-INT
Two things both have to be true before you owe a 1099-INT. The total interest you paid to one recipient during the calendar year must reach at least $600, and you must have paid that interest in the course of a trade or business.1Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID
Trade or business covers any activity you carry on for profit, whether you operate as a sole proprietor, a partnership, or a corporation. If your LLC borrows from a private lender to buy a rental property and pays $1,200 in interest that year, the interest was clearly paid in a business context and must be reported.
The $600 figure is a yearly total, not a per-payment number. Monthly payments where the interest components add up to $600 or more over the year put you over the threshold. An amortization schedule or payment log that separates principal from interest makes the year-end calculation straightforward.
When You Don’t Need to Issue a 1099-INT
Loans Between Individuals for Personal Reasons
A loan between two individuals for non-business purposes sits outside the requirement. Borrow $20,000 from a relative to renovate your kitchen, pay $900 in interest, and no 1099-INT is required from you. You’re not acting within a trade or business. The lender still owes tax on that interest income, but the reporting burden doesn’t fall on you.
Loans From Corporations, Banks, and Other Exempt Recipients
Even when the $600 threshold is met and the payment is business-related, certain lenders are exempt from receiving a 1099-INT. The IRS instructions list corporations, tax-exempt organizations, individual retirement arrangements, health savings accounts, U.S. government agencies, states, U.S. territories, registered securities and commodities dealers, brokers, and nominees or custodians.1Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID Most institutional lenders and banks are organized as corporations, so you’ll rarely need a 1099-INT for them.
Collect a completed Form W-9 from the lender before you lean on this exemption. The W-9 identifies the recipient’s entity type and exemption status and gives you documentation if the IRS ever asks.2Internal Revenue Service. Instructions for the Requester of Form W-9
Mortgages and Credit Cards
Home mortgage interest follows a separate reporting track. The lender, not the borrower, reports mortgage interest on Form 1098.3Internal Revenue Service. Instructions for Form 1098 (12/2026) Interest on credit cards and other revolving charge accounts is also excluded from the 1099-INT requirement. Carrying a balance on a business credit card does not trigger a 1099-INT to the card issuer.
Loans Used Partly for Personal Reasons
When borrowed funds serve both business and personal purposes, only the business-allocated portion of the interest counts toward the $600 threshold. A self-employed consultant who borrows money and uses 75% for business expenses and 25% for a personal vacation applies that same split to the interest. Tracking the allocation carefully from the outset saves headaches at filing time.
Get a W-9 Before You Pay
Request a completed Form W-9 from the lender before you make the first interest payment. The W-9 captures the lender’s full legal name, address, taxpayer identification number (TIN), and entity classification. A signed W-9 on file protects you from penalties for missing or incorrect TINs and documents any exemption.
If the lender refuses or fails to provide a correct TIN after you’ve asked, document every request in writing. The IRS looks at whether you exercised due diligence, and the paper trail matters if penalties come up later.
Without a valid TIN, you must begin backup withholding at a flat 24% rate on all future interest payments and remit those amounts directly to the IRS.4Internal Revenue Service. Backup Withholding The same requirement kicks in if the IRS notifies you that the TIN the lender gave is incorrect, or that the lender has underreported interest on prior returns.5Internal Revenue Service. Topic No. 307, Backup Withholding This is not optional. Failing to withhold when required carries the same exposure as failing to file the 1099-INT itself.
When and How to File
Furnish the recipient’s copy of Form 1099-INT by January 31 of the year after the interest was paid. For the 2025 tax year, that deadline shifts to February 2, 2026, because January 31 falls on a Saturday. Delivery can be by mail, or electronically if the recipient has consented.6Internal Revenue Service. General Instructions for Certain Information Returns (2025)
Paper copies filed with the IRS are due by the last day of February, which shifts to March 2, 2026. Paper filings require Form 1096 as a cover sheet summarizing the totals.7Internal Revenue Service. About Form 1096, Annual Summary and Transmittal of U.S. Information Returns Electronic filers get until March 31.
Electronic filing is mandatory if you file 10 or more information returns of any type during the calendar year. The threshold dropped from 250 returns to 10 beginning in 2024, which pulls many small businesses into mandatory e-filing for the first time.8Internal Revenue Service. Topic No. 801, Who Must File Information Returns Electronically The count aggregates across return types, so five 1099-NECs plus five 1099-INTs hits the threshold. For tax year 2026 filings due in early 2027, the IRS is retiring the legacy FIRE system and requiring electronic submissions through the newer Information Returns Intake System (IRIS).9Internal Revenue Service. Filing Information Returns Electronically (FIRE)
Keep copies of every filed 1099-INT and the corresponding W-9 documentation for at least three years from the filing date.10Internal Revenue Service. How Long Should I Keep Records?
What It Costs If You Skip It
The IRS assesses penalties on a per-return basis, and they rise the longer you wait. For returns due in 2026, the tiers are $60 per return if filed within 30 days of the deadline, $130 per return if filed after 30 days but by August 1, and $340 per return if filed after August 1 or not at all. Intentional disregard runs $680 per return with no annual cap.
Annual maximums apply at every tier except intentional disregard. Large businesses with gross receipts over $5 million face caps of $683,000, $2,049,000, and $4,098,500 across the three tiers. Small businesses with gross receipts of $5 million or less have lower caps of $239,000, $683,000, and $1,366,000.11Internal Revenue Service. 20.1.7 Information Return Penalties The same tiers apply separately to incorrect statements furnished to recipients, so a missed form can hit you twice.
The IRS can waive penalties for reasonable cause if you show you acted responsibly before and after the failure and that the failure resulted from circumstances beyond your control, such as a natural disaster, serious illness, or an agent’s error.12Internal Revenue Service. 13Internal Revenue Service. General Instructions for Certain Information Returns The two-step process feels counterintuitive, but it’s the only way the IRS can match the correction to the original record.