If you earn interest throughout the year from a high-yield savings account, CD, or money-market account totaling more than $10, each bank will send you Form 1099-INT to include with your tax return at the start of tax season. Box 1 on the form will list exactly how much interest you earned in your account. If you earned interest from more than one bank during the tax year, you'll get Form 1099-INT for each one and will need to add up the total interest and record it on Schedule 1 of Form 1040 (US Individual Income Tax Return). If your total interest income is more than $1,500 for the year, your interest income will be reported on Schedule B of Form 1040. Since you haven't yet paid taxes on the interest income you report on your tax return, you'll owe money to the IRS if the taxes due outweigh the amount of taxes you paid throughout the tax year. However, if you're due for a refund, the taxes you owe in relation to the earned interest income will just reduce the size of your refund.