Taxation of income from bonds can be complex, but understanding it is crucial for optimizing your tax strategy. Let’s break it down:
Interest income from bonds is generally taxable at the federal level and may also be subject to state and local taxes, unless specifically exempted by law ( IRC §61, “Gross income defined”). This includes interest from corporate bonds, U.S. Treasury bonds, and foreign bonds. Form 1099-INT is issued by the bond issuer, this form reports the interest income you received over the year. You must include this income on your federal tax return using Form 1040, line 2b and Schedule B. Example: If you hold a corporate bond that pays $1,000 in interest annually and you’re in the 24% tax bracket, you owe $240 in federal taxes on that interest.
Interest from municipal bonds (munis) is typically exempt from federal income tax and, if the bonds are issued by your state or local government, may also be exempt from state and local taxes. However, this interest may still be subject to the Alternative Minimum Tax (AMT). Municipal bonds are often used to fund public projects and are incentivized by tax exemptions ( IRC §103, “Interest on State and local bonds”). Even though the interest is tax-exempt, it is still reported on Form 1099-INT. You must report this interest on Form 1040, Line 2a.
Treasury Inflation-protected Securities (TIPS) are designed to protect against inflation. The principal value of TIPS adjusts with inflation, and you receive interest based on the adjusted principal. Interest payments are taxable as usual interest. The increase in principal due to inflation is taxable in the year it occurs, even though you don’t receive this amount until maturity. This is often referred to as “phantom income”. Form 1099-OID reports the inflation adjustment to the principal.
Phantom income refers to income that is taxable even though you haven’t received any cash. This often occurs with TIPS and zero-coupon bonds, which are sold at a discount and mature at face value. The concept ensures that taxpayers report all economic gains, even if not realized in cash ( IRS Pub. 1212). The IRS requires you to report a portion of the discount as interest income each year, even though you won’t receive the cash until maturity. Example: If you buy a zero-coupon bond for $900 that will mature at $1,000 in 10 years, you must report a portion of the $100 gain as interest income each year, even though you won’t receive the $1,000 until maturity. The IRS treats the annual accretion of the bond’s value as taxable interest income. This is outlined in IRS Pub. 550.