Textbook
1. Common stock
2. Preferred stock
3. Debt securities
4. Corporate debt
5. Municipal debt
6. US government debt
7. Investment companies
8. Alternative pooled investments
9. Options
10. Taxes
10.1 Dividends
10.2 Interest
10.3 Capital gains
11. The primary market
12. The secondary market
13. Brokerage accounts
14. Retirement & education plans
15. Rules & ethics
16. Wrapping up
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10.2 Interest
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10. Taxes

Interest

Interest is income received from a debt instrument (like a bond). When a bond is purchased, the investor lends money to an organization in return for interest. Unlike dividends, interest isn’t taxed favorably. However, depending on the issuer, taxes may be avoided.

As a reminder, here’s the tax status of different types of bond issuers:

US Government debt

  • Subject to federal taxes
  • Exempt from state and local taxes

Mortgage-backed securities

  • Subject to federal, state, and local taxes

Municipal debt

  • Exempt from federal taxes
  • Subject to state and local taxes
  • 100% tax-free if:
    • Resident
    • Territory bond

Corporate debt

  • Subject to federal, state, and local taxes

If taxes are due, the applicable tax rate is equal to the investor’s federal marginal income tax bracket. Interest is taxed the same as non-qualified dividends (as we discussed in the previous chapter). As of the tax year 2024, these are the income tax brackets for individuals and those filing jointly:

Rate Individuals Married filing jointly
10% $0 $0
12% $11,601 $23,201
22% $47,151 $94,301
24% $100,526 $201,051
32% $191,951 $383,901
35% $243,726 $487,451
37% $609,351 $731,201

Do not memorize these tax brackets; this chart is only for context.

Definitions
Marginal tax bracket
The tax bracket applied to the last dollar earned

Example: an individual making $50,000 would pay a 10% tax on the first $11,600 earned, a 12% tax on additional income up to $47,150, and a 22% tax on the remaining income received. Although the investor is taxed at three different rates, they fall in the 22% tax bracket.

State taxes depend on the state; you do not need to know the specifics. Interest is reported annually on form 1099-INT.

Key points

Interest

  • Potentially taxable income from debt securities
  • Reported on tax form 1099-INT
  • Tax rate equal to federal marginal income tax bracket (up to 37%)

US Government debt tax status

  • Subject to federal taxes
  • Exempt from state and local taxes

Municipal debt tax status

  • Exempt from federal taxes
  • Subject to state and local taxes
  • 100% tax-free if:
    • Resident
    • Territory bond

Corporate debt tax status

  • Subject to federal, state, and local taxes

Mortgage-backed securities tax status

  • Subject to federal, state, and local taxes

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