What Is a 1099-INT and When Will Your Bank Send One?
Interest feels like free money landing in an account, but the tax system treats it as ordinary income, and a small form is how that gets reported to both the saver and the government.
The short answer
A 1099-INT is a tax form a bank or credit union sends to report interest income paid to an account holder during the year. It’s typically issued when the interest earned meets a minimum reporting threshold set by the government and changing over time, though some institutions send one regardless of amount. The form matters because that interest is taxable income, whether or not a 1099-INT actually arrives.
What triggers the form
Banks generally send a 1099-INT to anyone who earned at least a certain amount of interest in a single account during the calendar year, and a copy also goes to the IRS. Interest from checking accounts, high-yield savings accounts, and certificates of deposit can all trigger the form. Multiple accounts at the same institution are often combined for reporting purposes, so someone with several small accounts might still cross the threshold in aggregate.
What’s actually on the form
The form typically shows the total interest paid during the year, along with the payer’s name and taxpayer identification information. It may also include boxes for early withdrawal penalties, interest on certain government obligations, or any backup withholding that applied. Each of these figures generally has its own place on a tax return, so it helps to look at the whole form rather than just the headline interest number.
- Box 1 interest income. The main figure — total taxable interest paid to the account during the year.
- Early withdrawal penalty. Shown separately if a CD was cashed out before maturity, since that penalty can be deductible.
- Federal tax withheld. Appears only if backup withholding applied to the account for some reason.
Why the form might not show up
Interest below the reporting threshold doesn’t automatically mean it’s tax-free — it usually just means the bank isn’t required to send a form for that amount. The income still generally needs to be reported on a tax return based on the account holder’s own records, such as monthly statements. It’s also common for the form to arrive electronically through online banking rather than by mail, so it’s worth checking the account portal directly rather than assuming nothing was sent.
When the numbers don’t match
Occasionally the interest total on a 1099-INT doesn’t line up with what an account holder tracked independently, often because of timing — interest credited in the final days of December versus paid out in January can shift which tax year it belongs to. Comparing the form against monthly or annual statements is a reasonable first step, and contacting the institution directly is the way to resolve a genuine discrepancy. Because tax rules around income reporting depend on individual circumstances and can change, a mismatch that doesn’t resolve easily is generally worth discussing with a tax professional.
The takeaway
A 1099-INT is simply the paper trail for interest a bank already paid — it doesn’t create new tax liability so much as document income that was taxable all along. Keeping personal records throughout the year, rather than waiting for the form to arrive, makes it easier to catch discrepancies and file with confidence.