Key Takeaways

  • Long-term capital gains (assets held >1 year) are taxed at preferential rates of 0%, 15%, or 20%.
  • Short-term capital gains are taxed as ordinary income at rates up to 37%.
  • The Net Investment Income Tax (NIIT) adds 3.8% on investment income for high earners.
  • Qualified dividends receive preferential long-term capital gains rates.
  • Municipal bond interest is exempt from federal income tax.
  • The wash sale rule disallows losses if substantially identical securities are repurchased within 30 days.
  • Tax-loss harvesting allows investors to offset gains with realized losses.
  • Cost basis methods (FIFO, specific identification, average cost) affect tax liability.
Last updated: December 2025

Investment Taxation

Understanding how investments are taxed is essential for making suitable recommendations and helping clients maximize after-tax returns.

Capital Gains Taxation

Capital gains occur when an asset is sold for more than its purchase price. The tax treatment depends on the holding period.

Holding Period Classifications

Holding PeriodClassificationTax Treatment
1 year or lessShort-termOrdinary income rates (10%-37%)
More than 1 yearLong-termPreferential rates (0%, 15%, 20%)

2025 Long-Term Capital Gains Tax Brackets

Filing Status0% Rate15% Rate20% Rate
SingleUp to $48,350$48,351 - $533,400Over $533,400
Married Filing JointlyUp to $96,700$96,701 - $600,050Over $600,050
Head of HouseholdUp to $64,750$64,751 - $566,700Over $566,700

Net Investment Income Tax (NIIT)

High-income taxpayers may owe an additional 3.8% Net Investment Income Tax on the lesser of:

  • Net investment income, OR
  • Modified AGI exceeding threshold ($200,000 single, $250,000 married filing jointly)

Net investment income includes: Interest, dividends, capital gains, rental income, royalties, and passive business income.

Dividend Taxation

Qualified Dividends

Dividends that qualify for preferential tax treatment:

  • From domestic corporations or qualified foreign corporations
  • Must hold stock for 60+ days during the 121-day period around the ex-dividend date
  • Taxed at long-term capital gains rates (0%, 15%, or 20%)

Non-Qualified (Ordinary) Dividends

Dividends taxed at ordinary income rates:

  • REIT dividends
  • Money market fund dividends
  • Most foreign corporation dividends
  • Dividends on shares held for less than 60 days
  • Dividends paid on employer stock in ESOP

Tax-Advantaged Investments

InvestmentFederal Tax TreatmentState Tax Treatment
Municipal BondsInterest exemptExempt if in-state (often)
Treasury SecuritiesInterest taxableExempt from state/local
Municipal Bond FundsPro-rata exemptVaries
Series I/EE BondsTax-deferred; exempt for educationExempt from state/local

Municipal Bond Considerations

Tax-equivalent yield helps compare municipal to taxable bonds:

Tax-Equivalent Yield = Muni Yield ÷ (1 - Marginal Tax Rate)

Example: 4% muni yield for 37% bracket investor
= 4% ÷ (1 - 0.37) = 4% ÷ 0.63 = 6.35%

Tax-Loss Harvesting

Selling investments at a loss to offset taxable gains.

Offset Rules

Gains/LossesOffset Against
Short-term lossesFirst offset short-term gains, then long-term gains
Long-term lossesFirst offset long-term gains, then short-term gains
Net capital lossesOffset up to $3,000 ordinary income per year
Excess lossesCarry forward indefinitely

The Wash Sale Rule

The wash sale rule disallows a loss if you buy "substantially identical" securities within:

  • 30 days before the sale, OR
  • 30 days after the sale

This creates a 61-day window (30 + 1 + 30) where repurchasing triggers the rule.

Key points:

  • Applies across ALL accounts (taxable, IRA, spouse's accounts)
  • Disallowed loss is added to the cost basis of the new shares
  • Holding period of original shares transfers to new shares
  • Cryptocurrencies are currently exempt from wash sale rules

"Substantially identical" includes:

  • Same stock or security
  • Options or contracts to acquire same stock
  • Convertible securities in the same company

Cost Basis Methods

MethodDescriptionBest For
FIFO (First In, First Out)Oldest shares sold firstDefault method
Specific IdentificationChoose which shares to sellTax optimization
Average CostAverage of all share costsMutual funds only
LIFO (Last In, First Out)Newest shares sold firstNot common

Tax Lot Selection Strategy

To minimize taxes: Sell shares with the highest cost basis first (maximize loss or minimize gain).

To maximize taxes (for lower income years): Sell shares with the lowest cost basis.

Exam Tip: Long-term = MORE than one year = LOWER tax rates. The wash sale rule creates a 61-day window (not 60). NIIT is 3.8% and applies to investment income over certain thresholds.

Capital Gains Tax Rates (%)
Loading diagram...
Wash Sale Rule: 61-Day Window
Test Your Knowledge

An investor sells stock at a loss on December 1 and purchases the same stock on December 15. Under the wash sale rule:

A
B
C
D
Test Your Knowledge

A married couple filing jointly has $300,000 in wages and $50,000 in investment income. Their Net Investment Income Tax (NIIT) liability is:

A
B
C
D
Test Your Knowledge

To receive qualified dividend treatment, an investor must hold the stock for at least:

A
B
C
D
Test Your Knowledge

An investor in the 32% marginal tax bracket is considering a municipal bond yielding 4%. What is the tax-equivalent yield?

A
B
C
D