Yes, interest income is generally taxed as ordinary income, meaning it’s added to your wages and other earnings and taxed at your regular federal rate. For 2026, those rates run from 10% to 37% depending on filing status and total taxable income.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 A few categories break the pattern: U.S. Treasury interest is still ordinary at the federal level but exempt from state tax, most municipal bond interest is federally tax-free, and savings bonds used for qualified education expenses can escape tax entirely.
What “Ordinary Income” Treatment Actually Means
Federal tax law treats interest credited to your account or received by you as gross income that is fully taxable.2eCFR. 26 CFR 1.61-7 – Interest Unlike qualified dividends or long-term capital gains, which get preferential rates (typically 0%, 15%, or 20%), interest sits in the same bucket as your paycheck. A dollar of interest and a dollar of wages face the same marginal rate.
That gap matters more than it looks. If you’re in the 24% bracket, the after-tax return on a savings account paying 4% drops to roughly 3%. Comparing a bond yield to a stock dividend yield without adjusting for the rate difference overstates what the bond is really paying you.
Timing follows a specific rule too. Interest becomes taxable in the year it’s available to you, not the year you withdraw it. If your bank credits interest to your account in December, you owe tax for that year even if you don’t touch the money until March.3eCFR. 26 CFR 1.451-2 – Constructive Receipt of Income The IRS calls this constructive receipt, and it regularly surprises people with CDs and deferred-interest accounts.
Interest Sources That Get the Ordinary Rate
The familiar sources all fall here: savings accounts, checking accounts, money market deposit accounts, and certificates of deposit. Credit union “dividends” on share accounts are also classified as interest for tax purposes, despite the name.4Internal Revenue Service. Publication 550 – Investment Income and Expenses
Corporate bond interest is ordinary income whether you hold the bonds directly or through a mutual fund. Interest you earn from lending money privately counts the same way, including a seller-financed mortgage or a personal loan to a family member. Even interest the IRS pays you on a delayed tax refund is taxable.5Internal Revenue Service. Topic No. 403 – Interest Received
You’re expected to report all taxable interest regardless of whether the payer sends you a form. Financial institutions issue Form 1099-INT when they pay you $10 or more during the year, but smaller amounts are still taxable.6Internal Revenue Service. About Form 1099-INT, Interest Income The IRS matches 1099 data against returns automatically, so leaving a small amount off is a quick way to trigger a notice.
Treasury and Savings Bond Interest
Interest from Treasury bills, notes, and bonds is fully taxable at the federal level as ordinary income. The compensating advantage is a complete exemption from state and local income taxes. Federal law prohibits states from taxing obligations of the United States government.7Office of the Law Revision Counsel. 31 USC 3124 – Exemption From Taxation In a high-tax state, that exemption meaningfully boosts your after-tax yield compared to a CD or corporate bond paying the same rate.
Series EE and Series I savings bonds follow the same rule: federally taxable at ordinary rates, state-exempt. You can also defer reporting the interest until you redeem the bond or it matures, which gives you some control over when the tax hits.
The Education Savings Bond Exclusion
Series EE and I bonds issued after 1989 qualify for a special federal exclusion if you use the proceeds for qualified higher education expenses. The interest can be entirely excluded from federal income tax.8Office of the Law Revision Counsel. 26 USC 135 – Income From United States Savings Bonds Used to Pay Higher Education Tuition and Fees The bond owner must have been at least 24 when the bond was issued, and the expenses must be for you, your spouse, or a dependent.9TreasuryDirect. Using Bonds for Higher Education
The exclusion phases out at higher incomes, with thresholds adjusted for inflation each year. Married couples must file jointly to claim it, and you report it on Form 8815. This is one of the only ways to make interest income completely tax-free at both the federal and state level.
Municipal Bond Interest: The Main Federal Exception
Interest from bonds issued by state and local governments is generally excluded from federal gross income.10Office of the Law Revision Counsel. 26 USC 103 – Interest on State and Local Bonds That makes munis especially attractive in higher brackets, where the tax savings can outweigh a lower stated yield. A 3.5% muni yield for someone in the 37% bracket is worth more after tax than a 5% corporate bond yield.
If the issuer is in your own state, the interest is typically exempt from that state’s income tax as well, producing a triple tax-free return at the federal, state, and local level. Interest from an out-of-state muni is usually subject to your home state’s income tax, which can erase much of the advantage.
One carve-out to watch: interest on certain private activity bonds, which are munis issued to finance projects that primarily benefit private entities, may be treated as a preference item for the alternative minimum tax.11Municipal Securities Rulemaking Board. Tax Treatment The 2026 AMT exemption shields most individuals: $90,100 for single filers and $140,200 for married couples filing jointly.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 If your income is near or above those levels, check whether a muni fund holds private activity bonds before assuming all its distributions are fully tax-free.
The Extra 3.8% for Higher Earners
Higher earners face a second layer on top of the ordinary rate. The net investment income tax (NIIT) adds 3.8% when modified adjusted gross income crosses these thresholds:12Office of the Law Revision Counsel. 26 USC 1411 – Imposition of Tax
- Married filing jointly: $250,000
- Single or head of household: $200,000
- Married filing separately: $125,000
These amounts are not indexed for inflation, so more taxpayers cross them each year. The tax applies to the lesser of your net investment income or the amount by which your modified AGI exceeds the threshold. Taxable interest counts as investment income; tax-exempt muni interest does not.13Internal Revenue Service. Questions and Answers on the Net Investment Income Tax Someone in the 37% bracket with substantial interest income can effectively pay 40.8% on that interest, which changes the comparison between munis and taxable bonds considerably.
How to Report Interest on Your Return
Total taxable interest goes on Form 1040, line 2b. Tax-exempt interest from munis goes on line 2a. The exempt amount doesn’t increase your tax, but the IRS still wants to see it, and it can affect other calculations like the NIIT threshold and the taxable portion of Social Security benefits.
Schedule B is required if your taxable interest exceeds $1,500, or if certain other conditions apply, such as claiming the education savings bond exclusion or receiving interest as a nominee.4Internal Revenue Service. Publication 550 – Investment Income and Expenses If your total is $1,500 or less and none of those conditions apply, you can report interest directly on Form 1040 and skip the schedule.14Internal Revenue Service. Instructions for Schedule B (Form 1040)
One deduction worth catching: if you cashed a CD early and paid a penalty, it shows up in Box 2 of your 1099-INT. You can deduct it as an adjustment to income whether or not you itemize, which directly reduces what you owe on the interest.