Tax-exempt non-qualified interest is reported on Line 2a of Form 1040, where it discloses tax-free interest income (usually from state and local government bonds) without adding anything to your taxable income. The reporting is informational, but it is not optional: the figure feeds into calculations that decide how much of your Social Security is taxable and how much you pay for Medicare.
What the Term Actually Means
The label combines two separate ideas that arrive stuck together on brokerage statements.
“Tax-exempt” means the interest is excluded from your gross income for federal purposes. Interest on bonds issued by states, cities, counties, and other local government entities is generally not included in gross income under federal law.1Office of the Law Revision Counsel. 26 USC 103 – Interest on State and Local Bonds You receive it, you keep it, and it does not raise your federal tax bill.
“Non-qualified” is a rate classification. Qualified dividends and long-term capital gains get preferential rates of 0%, 15%, or 20%.2Office of the Law Revision Counsel. 26 USC 1 – Tax Imposed Interest income never qualifies for those rates; if it were taxable, it would be taxed as ordinary income. For interest that is already tax-exempt the distinction is academic, but your brokerage statement still uses the term to separate interest from qualified dividend income sitting in the same account.
Where It Comes From
The most common source is municipal bonds, debt issued by state and local governments to fund public projects like schools, highways, and water systems. General obligation bonds are backed by the issuer’s taxing authority; revenue bonds are backed by income from a specific project such as tolls or utility fees. Interest on both is generally exempt from federal income tax.1Office of the Law Revision Counsel. 26 USC 103 – Interest on State and Local Bonds
If you hold those bonds through a mutual fund or ETF, the fund passes the interest along as exempt-interest dividends. These arrive on Form 1099-DIV rather than 1099-INT, and the amount appears in Box 12.3Internal Revenue Service. Instructions for Form 1099-DIV They still get reported on Line 2a alongside directly-held bond interest.4Internal Revenue Service. Instructions for Form 1040 (2025)
Series EE and Series I savings bonds issued after 1989 can also produce tax-exempt interest if the proceeds pay qualified higher education expenses for you, your spouse, or a dependent.5TreasuryDirect. Using Bonds for Higher Education The exclusion phases out at higher incomes. For 2025 returns it begins to phase out at a modified adjusted gross income of $99,500 for single filers ($149,250 joint) and disappears at $114,500 ($179,250 joint).6Internal Revenue Service. Publication 970 – Tax Benefits for Education You compute the excluded amount on Form 8815 and add it to whatever else lands on Line 2a.7Internal Revenue Service. Form 8815 – Exclusion of Interest From Series EE and I U.S. Savings Bonds Issued After 1989
How to Report It on Your Federal Return
The Forms You Should Receive
Any payer that credits you at least $10 in tax-exempt interest must send a Form 1099-INT and file a copy with the IRS.8Internal Revenue Service. About Form 1099-INT, Interest Income The tax-exempt amount sits in Box 8.9Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID If part of that interest comes from private activity bonds subject to AMT, that subset is broken out in Box 9. The Box 9 figure is a portion of Box 8, not an addition to it.10Internal Revenue Service. Form 1099-INT – Interest Income
For fund holdings, look to Form 1099-DIV instead: exempt-interest dividends are in Box 12, and any AMT-preference portion is in Box 13.3Internal Revenue Service. Instructions for Form 1099-DIV
What Goes on Line 2a
Add up the tax-exempt interest from every 1099-INT (Box 8) and every 1099-DIV (Box 12), plus any excluded savings bond interest from Form 8815, and enter the total on Line 2a of Form 1040, labeled “Tax-exempt interest.”4Internal Revenue Service. Instructions for Form 1040 (2025) The number is informational. It does not flow into taxable income and does not increase the tax you owe.
Taxable interest, from bank accounts, CDs, corporate bonds, and Treasury securities, is different. That goes on Line 2b. If your taxable interest exceeds $1,500 you also file Schedule B and list each payer.11Internal Revenue Service. About Schedule B (Form 1040), Interest and Ordinary Dividends That $1,500 threshold applies only to taxable interest.
The Bond Premium Adjustment
If you bought a tax-exempt bond above its face value, the IRS instructions for Line 2a require you to reduce the tax-exempt interest you report by the amortized bond premium for the year.4Internal Revenue Service. Instructions for Form 1040 (2025) You report the net figure, not the gross. Brokerage firms usually handle the arithmetic and show the adjusted number on year-end statements, but verify it when the totals on your 1099 don’t line up with what you expect.
If You Didn’t Get a 1099
Payers only have to issue a 1099-INT once payments reach $10. Below that, you may receive nothing at all. The reporting duty still falls on you. This trips up investors who hold small positions across several municipal bond funds that each stay under the threshold but add up to real money on Line 2a.
Why the IRS Wants a Number You Don’t Owe Tax On
Line 2a exists because tax-exempt interest is added back into several federal calculations that decide how much you actually pay elsewhere.
The first is Social Security. If you receive benefits, the taxable portion is set by a formula called provisional income: adjusted gross income, plus tax-exempt interest, plus half of your Social Security benefits. The statute specifically adds tax-exempt interest back.12Office of the Law Revision Counsel. 26 USC 86 – Social Security and Tier 1 Railroad Retirement Benefits Single filers with provisional income over $25,000 owe tax on up to 50% of benefits, and over $34,000 on up to 85%. Joint filers cross those points at $32,000 and $44,000. The thresholds have never been indexed to inflation. A retiree who loaded up on municipal bonds for tax-free income can find the same interest dragging Social Security benefits into taxable territory.
The second is Medicare. Part B and Part D premiums step up at higher incomes through the Income-Related Monthly Adjustment Amount (IRMAA), and the Social Security Administration uses MAGI from two years back to set current premiums. For 2026, the base Part B premium is $202.90 per month, with surcharges beginning at MAGI above $109,000 single or $218,000 joint. The top tier reaches $689.90 per month for single filers at or above $500,000 in MAGI ($750,000 joint).13CMS. 2026 Medicare Parts A and B Premiums and Deductibles Because tax-exempt interest is included in the MAGI used for IRMAA, a large municipal bond portfolio can push you into a higher bracket even though the interest itself is federally tax-free.
One place tax-exempt interest does not follow you: the 3.8% net investment income tax. It is excluded from net investment income and not added into MAGI for the NIIT threshold.14Internal Revenue Service. Questions and Answers on the Net Investment Income Tax
Private Activity Bonds and the AMT
Not every municipal bond is fully tax-free. A bond is a private activity bond when more than 10% of the proceeds are used for a private business purpose and more than 10% of the debt service is secured by or derived from that activity.15Office of the Law Revision Counsel. 26 USC 141 – Private Activity Bond; Qualified Bond Airport terminals leased to airlines, hospital buildings run by private healthcare systems, and stadium projects are common examples.
Interest on most private activity bonds issued after August 7, 1986, is still exempt from regular federal income tax, but it counts as a tax preference item for the alternative minimum tax. If you’re subject to AMT, that interest gets added back on Form 6251. Several categories are carved out, including qualified housing bonds and bonds issued by 501(c)(3) organizations such as nonprofit hospitals and universities.16Office of the Law Revision Counsel. 26 USC 57 – Items of Tax Preference Box 9 on your 1099-INT (or Box 13 on your 1099-DIV) tells you how much of your tax-exempt interest is in the AMT category. If that box has a number and your income is near the AMT threshold, run Form 6251 before assuming the interest is truly tax-free.
State Tax Treatment Is Separate
The federal exemption does not automatically carry to your state return. Most states with an income tax exempt interest on bonds issued within their own borders and tax interest on bonds from other states. If your state uses federal AGI as its starting point, you’ll usually add back out-of-state municipal bond interest on the state return. Brokerage firms that manage municipal bond portfolios typically provide a state-by-state breakdown showing where each dollar of interest was earned, which is what you’ll need for that adjustment. Residents of states with no income tax skip this step entirely.
Because of state-level treatment, in-state bonds sometimes deliver a better after-tax return than higher-yielding out-of-state bonds, particularly in high-tax states. When you compare municipal bond yields, work the math on both federal and state consequences rather than reading the coupon rate alone.