How Are Corporate Bonds Taxed: Interest, Gains, and Discounts

Corporate bonds are taxed in two main ways: the interest you receive is taxed as ordinary income at your federal rate, and any profit from selling a bond before maturity is taxed as a capital gain. Most states tax the interest too, unlike U.S. Treasury interest. A handful of special rules apply if you buy a bond at a discount or a premium, and holding bonds inside a retirement account changes the picture entirely.

Federal Tax on the Interest

Every coupon payment from a corporate bond is ordinary income on your federal return. The IRS taxes it at the same rates as wages, not at the lower rates that apply to long-term capital gains or qualified dividends. For 2026, federal brackets run from 10% to 37%, with the top rate starting at $640,600 for single filers and $768,700 for joint filers.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026

You owe the tax in the year the interest is paid or credited to your brokerage account, even if you leave the cash there.2Internal Revenue Service. Topic No. 403, Interest Received

Higher earners also pay a 3.8% Net Investment Income Tax on top of the regular rate. NIIT applies to the lesser of your net investment income or the amount your modified adjusted gross income exceeds these thresholds:3Internal Revenue Service. Topic No. 559, Net Investment Income Tax

  • $200,000 if you file single or head of household
  • $250,000 if you file jointly
  • $125,000 if you file married separately

For a single filer in the top bracket who also triggers NIIT, the combined federal rate on bond interest reaches 40.8%. That’s the number to compare against the tax-free yield on a municipal bond when you’re deciding which to hold.

State Tax on the Interest

Most states treat corporate bond interest as fully taxable ordinary income. This is where corporate bonds differ sharply from Treasuries: federal law shields U.S. Treasury interest from state and local income tax.4GovInfo. 31 USC 3124 – Exemption From Taxation Corporate bonds get no such protection because they are private-sector debt.

State rates on interest income run from zero in states with no income tax to above 13% at the top. Stacked on top of federal tax, the combined effective rate on corporate bond interest can push past 45% for top earners in high-tax states.

Selling a Bond Before Maturity

If you sell a corporate bond for more than you paid, the profit is a capital gain. If you sell for less, you have a capital loss. The rate depends on how long you owned it. Bonds held more than a year get long-term capital gains rates; anything held a year or less is short-term and taxed at your ordinary income rate.5Internal Revenue Service. Topic No. 409, Capital Gains and Losses

Long-term rates for 2026:

  • 0% on taxable income up to $49,450 (single) or $98,900 (joint)
  • 15% above those amounts up to $545,500 (single) or $613,700 (joint)
  • 20% above those amounts

Your holding period starts the day after you buy and runs through the day you sell. A bond held exactly one year to the day is still short-term; you need one year and one day for long-term treatment.5Internal Revenue Service. Topic No. 409, Capital Gains and Losses

Losses offset gains of the same type first, then the other type. If losses still exceed gains, you can deduct up to $3,000 of the excess against ordinary income ($1,500 if married filing separately), and anything left carries forward to future years indefinitely.5Internal Revenue Service. Topic No. 409, Capital Gains and Losses

When you redeem a bond at maturity, you generally have no gain or loss because you receive the face value that equals your adjusted basis. The taxable events happen along the way, in the form of interest, OID accruals, or a sale before maturity.

Bonds Bought at a Discount

Two different discount rules can turn what looks like a capital gain into ordinary income. Which one applies depends on whether the discount existed when the bond was originally issued or arose later on the secondary market.

Original Issue Discount

Some corporate bonds are sold below face value from day one. Zero-coupon bonds are the clearest example: you pay a deep discount and collect the full face amount at maturity, with no cash coupons in between. The IRS does not wait until maturity to tax the built-in gain.

Each year you hold an OID bond, you must report a portion of the discount as interest income, even though no cash arrives.6Internal Revenue Service. Publication 1212, Guide to Original Issue Discount (OID) Instruments The amount is calculated using a constant yield method,7eCFR. 26 CFR 1.1272-1 – Current Inclusion of OID in Income and your broker does the math and reports it on Form 1099-OID.

Each year’s OID inclusion also raises your cost basis by the same amount, so you are not taxed again on that income when the bond matures or you sell. Skipping the annual reporting risks underpayment penalties and later inflates your taxable gain because the basis adjustment never happens.

Market Discount

A market discount bond is one you buy on the secondary market for less than its face value (or less than its adjusted issue price if it was itself an OID bond). The discount typically reflects a price drop after issuance, often because interest rates rose or the issuer’s credit weakened.

When you sell or redeem a market discount bond, gain up to the amount of the accrued market discount is treated as ordinary income, not capital gain.8Office of the Law Revision Counsel. 26 USC 1276 – Disposition Gain Representing Accrued Market Discount Treated as Ordinary Income Only gain beyond the accrued discount qualifies for capital gains rates. The discount accrues on a straight-line basis by default, though you can elect a constant-interest method that pushes less income into the early years.

A de minimis exception ignores very small discounts: if the total discount is less than one-quarter of one percent of face value multiplied by the number of complete years to maturity when you bought the bond, the discount is treated as zero and any gain is a straightforward capital gain.

You can also elect to include market discount in income each year as it accrues instead of waiting until sale. The election increases your basis annually and turns what would have been ordinary income at sale into potential capital gain. Once made, it applies to every market discount bond you acquire that year and afterward.

Bonds Bought at a Premium

Paying more than face value creates a bond premium. You can elect to amortize the premium over the bond’s remaining life, which reduces the taxable interest you report each year rather than creating a separate deduction.9Office of the Law Revision Counsel. 26 USC 171 – Amortizable Bond Premium10eCFR. 26 CFR 1.171-1 – Bond Premium

To elect, you offset interest with premium on your timely filed return for the first year you want the election in effect, and attach a statement citing Section 171.11eCFR. 26 CFR 1.171-4 – Election to Amortize Bond Premium on Taxable Bonds The election then covers every taxable bond you own or later acquire and is binding unless the IRS lets you revoke it. Each year’s amortization also reduces your cost basis, so if you sell before maturity your adjusted basis will be lower than what you paid.

Accrued Interest When You Buy Mid-Period

Buy a corporate bond between coupon dates and part of your purchase price pays the seller for interest that accrued before you owned the bond. When the next full coupon lands, the portion you already paid the seller is a return of your own money, not taxable income to you.12Internal Revenue Service. Publication 550, Investment Income and Expenses

Your broker will report the entire coupon on Form 1099-INT. To avoid tax on the seller’s portion, list all interest on Schedule B, subtotal it, then subtract the accrued interest you paid at purchase and label the subtraction “Accrued Interest.” The remaining figure is the interest actually taxable to you.

Holding Corporate Bonds in Retirement Accounts

The simplest way to blunt the tax impact of corporate bonds is to hold them inside a tax-advantaged retirement account. In a traditional IRA or 401(k), interest and gains are not taxed in the year they are earned; you pay ordinary income tax only when you withdraw in retirement.13Internal Revenue Service. Traditional IRAs The deferral is especially valuable for high-coupon bonds that would otherwise trigger a large annual bill.

In a Roth IRA, you contribute after-tax dollars, but qualified withdrawals of the interest and gains your bonds earned are entirely tax-free. Inside a Roth you also stop worrying about OID accruals, market discount, and premium amortization, since none of those rules matter while the bonds stay in the account. The tradeoffs: you cannot deduct losses on bonds held in any retirement account, and withdrawals from a traditional account are taxed as ordinary income regardless of whether the underlying gains would have qualified for long-term capital gains rates in a taxable account.

The Forms You’ll See

Your broker handles most of the reporting, but you should verify the figures against your own records:

If the basis on your 1099-B is wrong, which is common when OID or premium amortization apply, correct it on Form 8949. Enter the broker’s basis, then use the adjustment column to reflect OID basis increases or premium amortization reductions.17Internal Revenue Service. Instructions for Form 8949 The corrected gain or loss carries to Schedule D. Keeping your own log of purchase dates, prices, OID accruals, and amortization amounts through the year makes that reconciliation far easier at filing time.