Is your income high enough to owe two extra taxes?

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Published: 09 September 2022 09 September 2022

High-income taxpayers face two special taxes — a 3.8% net investment income tax (NIIT) and a 0.9% additional Medicare tax on wage and self-employment income. Here’s an overview of the taxes and what they may mean for you.

3.8% NIIT

This tax applies, in addition to income tax, on your net investment income. The NIIT only affects taxpayers with adjusted gross income (AGI) exceeding $250,000 for joint filers, $200,000 for single taxpayers and heads of household, and $125,000 for married individuals filing separately.

If your AGI is above the threshold that applies ($250,000, $200,000 or $125,000), the NIIT applies to the lesser of 1) your net investment income for the tax year or 2) the excess of your AGI for the tax year over your threshold amount.

The “net investment income” that’s subject to the NIIT consists of interest, dividends, annuities, royalties, rents and net gains from property sales. Wage income and income from an active trade or business isn’t included. However, passive business income is subject to the NIIT.

Income that’s exempt from income tax, such as tax-exempt bond interest, is likewise exempt from the NIIT. Thus, switching some taxable investments to tax-exempt bonds can reduce your exposure. Of course, this should be done after taking your income needs and investment considerations into account.

How does the NIIT apply to home sales? If you sell your principal residence, you may be able to exclude up to $250,000 of gain ($500,000 for joint filers) when figuring your income tax. This excluded gain isn’t subject to the NIIT.

However, gain that exceeds the exclusion limit is subject to the tax. Gain from the sale of a vacation home or other second residence, which doesn’t qualify for the exclusion, is also subject to the NIIT.

Distributions from qualified retirement plans, such as pension plans and IRAs, aren’t subject to the NIIT. However, those distributions may push your AGI over the threshold that would cause other types of income to be subject to the tax.

Additional 0.9% Medicare tax

Some high-wage earners pay an extra 0.9% Medicare tax on part of their wage income, in addition to the 1.45% Medicare tax that all wage earners pay. The 0.9% tax applies to wages in excess of $250,000 for joint filers, $125,000 for a married individuals filing separately and $200,000 for all others. It applies only to employees, not to employers.

Once an employee’s wages reach $200,000 for the year, the employer must begin withholding the additional 0.9% tax. However, this withholding may prove insufficient if the employee has additional wage income from another job or if the employee’s spouse also has wage income. To avoid that result, an employee may request extra income tax withholding by filing a new Form W-4 with the employer.

An extra 0.9% Medicare tax also applies to self-employment income for the tax year in excess of the same amounts for wage earners. This is in addition to the regular 2.9% Medicare tax on all self-employment income. The $250,000, $125,000, and $200,000 thresholds are reduced by the taxpayer's wage income.

Reduce the impact

As you can see, these two taxes may have a significant effect on your tax bill. Contact us to discuss these taxes and how their impact could be reduced.

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