Do Real Estate Professionals Pay the 3.8% Net Investment Income Tax?

Not automatically. Real estate professional status (REPS) changes how rental losses are treated under the passive activity rules. The 3.8% net investment income tax (NIIT) asks a different question. Is your rental income earned in the ordinary course of a trade or business? Treas. Reg. §1.1411-4(g)(7) gives real estate professionals a safe harbor for that question. Meet it, and the rental income stays out of the tax. Meet it in the year you sell, and the gain stays out too. Miss it, and you can owe the 3.8% even with REPS.

This is the NIIT piece of our REPS series. If you are new to REPS, start with REPS and passive losses.

What the 3.8% tax hits

Section 1411 adds a 3.8% tax on the smaller of two amounts. One is your net investment income. The other is how far your modified adjusted gross income (MAGI) is over a threshold.

The IRS says these thresholds are not indexed for inflation.

Rents count as net investment income. So does gain from selling investment real estate. Rental income comes out only if two things are true. First, the rental is not a passive activity for you. Second, it is a trade or business under section 162. You need both. REPS plus material participation can get you the first one. It does not prove the second.

Why REPS alone is not enough

The IRS says it directly in the Form 8960 instructions. Qualifying as a real estate professional does not necessarily mean you are in a trade or business with your rental real estate. If the rental is not a section 162 trade or business, or you do not materially participate, the rental income is included in net investment income.

The safe harbor answers the trade-or-business question for you, as long as you meet its hours test.

How the safe harbor works

You are inside the safe harbor for a rental real estate activity when both of these are true:

1. You are a real estate professional for the year. That means more than half of your working hours, and more than 750 hours, in real property trades or businesses where you materially participate (§469(c)(7)(B)). On a joint return, one spouse has to meet both tests alone.
2. You put more than 500 hours into that rental real estate activity. Either this year, or in any five of the ten tax years right before this one. The five years do not have to be in a row.

When you qualify, two things happen:

• Gross rental income from that activity is treated as earned in the ordinary course of a trade or business. It comes out of net investment income.
• If you qualify in the year you sell, gain or loss on property used in that activity gets the same treatment. The gain comes out of net investment income too.

The rental still has to be nonpassive, which means material participation. More than 500 hours in the activity this year also meets the first material participation test in Temp. Reg. §1.469-5T(a). For how the seven tests and the $25,000 allowance differ, see material participation vs active participation.

Which hours count toward the 500

Any participation that would count toward material participation under section 469 counts for the safe harbor (§1.1411-4(g)(7)(ii)(A)). So the material participation rules apply here too.

• Investor-type work usually does not count. Reviewing statements or reports for your own information is the classic example, unless you are directly involved in day-to-day management (Temp. Reg. §1.469-5T(f)(2)(ii)).
• Your spouse's participation counts toward material participation (§469(h)(5)). It does not help either of you pass the 750-hour or more-than-half tests. Those stay one spouse at a time.
• The proof standard is the same as REPS. Write down what you did and when. A reconstructed estimate built at tax time is what loses in court.

For the activity-by-activity list, see what counts toward real estate professional hours. For the log itself, see how to keep a REPS time log that holds up.

The grouping election decides the math

Each rental property is generally its own activity. The §1.469-9(g) election treats all of your rental real estate as one activity. The regulation says that election also applies to the NIIT safe harbor. With it, the 500 hours are tested across your rental real estate combined. Without it, each property generally has to clear 500 hours by itself. That is a hard bar for anyone who owns more than a couple of properties.

The election is generally made with a statement on an original return, and it sticks for later years. If it was missed, late-election relief may be available under Rev. Proc. 2011-34. Read how to make the REPS grouping election before you rely on it.

One carve-out. Rental real estate you grouped with an operating business under §1.469-4(d)(1) is not a "rental real estate activity" for the safe harbor. It falls under a different rule, covered below.

If you miss the safe harbor

Missing it does not settle the question. The regulation says failing the safe harbor does not stop you from showing that the income is from a trade or business under the other §1411 rules (§1.1411-4(g)(7)(iii)). That becomes a facts argument about whether your rentals are a section 162 trade or business. Your hours, how regularly you work on the rentals, and what you do yourself will all be part of it. You carry the proof.

Rentals that follow different rules

Renting to your own business. Say you own a building and rent it to an operating business where you materially participate. §1.469-2(f)(6) generally treats that net rental income as nonpassive. The Form 8960 instructions treat it as earned in the ordinary course of a trade or business. Gain on a later sale gets the same treatment. You do not need REPS for that piece. The same goes for a rental properly grouped with an operating business you materially participate in under §1.469-4(d)(1).

Short-term rentals. A short-stay activity that meets an exception in Temp. Reg. §1.469-1T(e)(3)(ii) is not a "rental activity" for these rules. So the REPS safe harbor does not apply to it. It can still stay out of net investment income if it rises to a section 162 trade or business and you materially participate. The Form 8960 instructions list that combination as income to back out.

A loss year works in both directions

A rental that is a nonpassive trade or business sits outside net investment income in both directions. A loss from that rental does not reduce the net investment income from your brokerage account. On Form 8960, line 4b backs out nonpassive trade or business income and losses, and losses are entered as a positive number.

The loss still lowers your adjusted gross income. MAGI is the other half of the NIIT formula. If the MAGI side is the smaller number, the loss can still lower the tax. Run both sides before you count on it. Big cost segregation years make this question bigger. See REPS, cost segregation, and the 2026 excess business loss cap.

When you sell

The sale is often where the safe harbor matters most. The IRS lists gain from selling investment real estate as net investment income. If you meet the safe harbor in the year of sale, gain on property used in that rental real estate activity comes out.

A hypothetical. A married couple files jointly. Their MAGI is already over $250,000 before the sale. They sell a rental with $400,000 of gain. If that gain is net investment income, 3.8% of $400,000 is $15,200 of NIIT on top of the regular capital gains and recapture tax. If they meet the safe harbor that year, that $15,200 does not apply. For how recapture works on the same sale, see depreciation recapture when you sell investment property.

Two timing traps:

• You have to be a real estate professional in the year you sell. The five-of-ten lookback replaces the 500-hour piece only. It does not replace the 750-hour and more-than-half tests. An owner who winds down and stops clearing 750 hours loses the safe harbor, however long their history.
• Light years count. Owners often slow down the year they list a property. If the hours drop below the tests that year, the gain can land in net investment income.

Gain you defer in a 1031 exchange is not in taxable income for that year, so it is not net investment income for that year either. See 1031 exchange planning.

California

The 3.8% tax is federal only. California has no version of it. California does tax the rental income and the gain at its regular rates. It also does not follow federal REPS for passive losses, so rentals can stay passive on the state return.

Common mistakes

• Assuming REPS means no NIIT.
• Counting hours across the whole portfolio without a grouping election on file.
• Slowing down in the year of a sale and losing REPS for that year.
• Expecting a REPS rental loss to offset dividends and capital gains for NIIT.
• Treating an Airbnb that meets the short-stay exception as if the REPS safe harbor covers it.

Frequently asked questions

Do real estate professionals pay the net investment income tax?

Not automatically. REPS makes rental losses nonpassive if you materially participate, but rental income stays in net investment income unless it is earned in a section 162 trade or business. The safe harbor in Treas. Reg. §1.1411-4(g)(7) settles that question for a real estate professional who puts more than 500 hours into the rental activity.

What is the 500-hour safe harbor for NIIT?

You qualify if you are a real estate professional for the year and you participate in a rental real estate activity for more than 500 hours that year, or did so in any five of the prior ten years. The rental income from that activity is then treated as trade or business income. It is not net investment income. If you qualify in the year of sale, the gain is excluded too.

Does the grouping election help with the NIIT safe harbor?

Yes. A §1.469-9(g) election to treat all rental real estate as one activity also applies to the safe harbor. Your 500 hours are then tested across all of your rental real estate combined, not property by property.

Is gain on selling a rental subject to NIIT if I am a real estate professional?

It depends on the year of sale. If you are a real estate professional that year and meet the 500-hour safe harbor for the activity, the gain is not net investment income. If you fail either test that year, the gain can be subject to the 3.8% tax.

Does a REPS rental loss reduce my net investment income?

Generally no. A loss from a nonpassive rental trade or business is backed out on Form 8960, so it does not offset dividends, interest, or capital gains for NIIT. It does lower adjusted gross income, which can reduce the tax when the MAGI side of the formula is the smaller number.

Does California have a net investment income tax?

No. The 3.8% tax is federal only. California taxes rental income and gains at its regular income tax rates, and it does not follow federal REPS treatment for passive losses.

Talk it through with us

Bring your hour logs, a list of properties, a copy of any grouping election you filed, and any sale you are planning. We will tell you where you stand on the safe harbor and what the 3.8% could mean in the year you sell. Book a free 30-minute New Client Introduction.

LaviCPA is a Los Angeles CPA firm for real estate investors. Shawn Lavi, CPA, is the firm's principal. Elias Lavi, CPA, is its founder and co-owner.