Easy Net Investment Income Tax Calculator

How to calculate net investment income tax

net investment income taxNet investment income tax is a medicare tax charged on Individuals who have income  from capital gains ,interest, dividend exceeding a threshold specified under Internal Revenue Code.This extra medicare tax is known as Net Investment Income Tax (NIIT) .You should not confuse this extra medicare tax with 0,9 % additional medicare tax that applies only to wages, compensation and self-employment income over the $200,000 limit . Basically NIIT is intended to tax wealthy people who have income from various other sources-like capital gains, interest, dividend etc .So a taxpayer may be subject to both the Additional Medicare Tax and the NIIT, but not necessarily on the same types of income.

What constitutes Net Investment Income ?

Examples of investment income that is subject to the NIIT include dividends, interest, passive income, annuities, royalties and capital gains , non-qualified annuities, income from businesses involved in trading of financial instruments or commodities and businesses that are passive activities to the taxpayer (within the meaning of section 469). IRC allows certain expense to be reduced while computing the Net Investment Income.

What is the Net Investment Income Tax Rate ?

Net Investment Income Tax (NIIT) is  a 3.8% Medicare tax that applies to investment income and to regular income over a certain threshold. If your Modified Adjusted Gross Income exceeds $200,000 (or $250,000 if you’re married and filing jointly) you may be subject to the NIIT.

That 3.8% tax will be applied to the least of

  • Either your net investment income or
  • the amount by which your MAGI exceeds the threshold limit  as given below .

Individuals will owe the tax if they have Net Investment Income and also have modified adjusted gross income over the following net investment income tax threshold:

Filing Status

Threshold Amount

Married filing jointly

$250,000

Married filing separately

$125,000

Single

$200,000

Head of household (with qualifying person)

$200,000

Qualifying widow(er) with dependent child

$250,000

Taxpayers should be aware that these threshold amounts are not indexed for inflation.

You can report your on net investment income form IRS Form 8690.

Net Investment Income Tax Calculator

This will answer your question ” how to calculate net investment income tax?” , Just input the fields and you get the net investment income tax along with any additional medicare tax if you are salaried person.

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