NET INVESTMENT INCOME TAX
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A 3.8% tax on investment income (interest, dividends, capital gains, rents, royalties, and annuities) if an individual’s income is above a certain threshold.
Summary
The Net Investment Income Tax (NIIT) is an additional 3.8% federal tax that applies to certain types of investment income when your total income exceeds specific thresholds. It was introduced as part of the Affordable Care Act to help fund healthcare programs. This tax applies to 'unearned' income like interest from savings accounts, stock dividends, capital gains from selling investments, rental income from properties, royalties, and annuity payments. The key thresholds are $200,000 for single filers and $250,000 for married couples filing jointly. Importantly, this tax only applies to the lesser of your net investment income OR the amount by which your income exceeds the threshold.
Usage Context
This term is crucial when studying high-income tax planning, investment taxation, healthcare-related taxes, and comprehensive tax strategy. It's particularly important for understanding the full tax impact of investment decisions for affluent clients and for exam questions involving complex tax scenarios.
Common Confusions
- Thinking it applies to all investment income regardless of total income level
- Confusing it with regular capital gains tax rates
- Believing it applies to retirement account distributions
- Not understanding it only applies to the excess over the threshold
- Mixing up the income thresholds for different filing statuses
