Many practitioners apply §469 using only one of the seven material participation tests: more than 500 hours is material participation, and anything less is passive.
The most often overlooked material participation test is the significant participation activity (SPA) test under Treas. Reg. §1.469-5T(a)(4). It carries two rules of its own:
An aggregation test that can make the activity nonpassive, and
A recharacterization rule that makes income nonpassive while losses remain passive.
If ignored, the recharacterization rule can blow up carefully laid passive loss planning or subject income to the net investment income tax (NIIT) that is not owed.
SPA Defined
An SPA is a trade or business activity in which the individual participates for more than 100 hours during the year and in which the individual would not materially participate under any of the other six tests in Treas. Reg. §1.469-5T(a). See Treas. Reg. §1.469-5T(c).
The activity must be a trade or business activity as defined under Treas. Reg. §1.469-4(b)(1), which explicitly excludes rental activities; a rental activity can never be an SPA. Remember that most short-term rentals are not §469 rental activities because the average length of customer use is seven days or less under Temp. Reg. §1.469-1T(e)(3)(ii)(A).
When determining hours spent in the activity, work done in the taxpayer’s capacity as an investor (reviewing financial statements, monitoring operations in a non-managerial capacity) is excluded unless the taxpayer is directly involved in day-to-day management. See Treas. Reg. §1.469-5T(f)(2)(ii). In addition, a spouse’s hours count as the taxpayer’s hours, whether or not a joint return is filed under §469(h)(5) and Treas. Reg. §1.469-5T(f)(3).
SPA Aggregation Rule
If the taxpayer’s aggregate participation in all SPAs for the year exceeds 500 hours, the taxpayer materially participates in each of them. Treas. Reg. §1.469-5T(a)(4).
An activity that independently satisfies another test, such as more than 500 hours of participation, is not an SPA and is not included in the aggregation.
There is no election. If the aggregate exceeds 500 hours, losses from those activities are nonpassive, but so is their income.
SPA Recharacterization Rule
If aggregate SPA hours are 500 or less, the activities remain passive, but Treas. Reg. §1.469-2T(f)(2) recharacterizes their net income as nonpassive. When passive activity gross income from all SPAs exceeds passive activity deductions from all SPAs, a ratable portion of the net passive income from each profitable SPA is treated as not from a passive activity. The ratable portion is the group’s overall net income divided by the total net income of the profitable SPAs only.
The rule is asymmetric by design. A net loss from the SPA group stays passive and is limited under §469. Net income from the SPA group becomes nonpassive. The taxpayer gets the worst outcome in both directions.
Example 1 - Eager Eartha
Eartha is a full-time self-employed enrolled agent who works 1,500 hours a year in her business. She has two side hustles in which she is an owner and works part-time: 400 hours in a restaurant and 150 hours in a shoe store. Eartha does not materially participate in the restaurant and shoe store under any other test. The restaurant and shoe store are both SPAs, but the enrolled agent firm is excluded because she materially participates by working more than 500 hours. The combined 550 hours in the SPAs make both activities nonpassive. See Treas. Reg. §1.469-5T(k), Ex. 4.
Example 2 - Rental Ryan
In tax year 2026, Ryan owns four rental properties:
A long-term rental (LTR) with a net loss of $12,000 in which Ryan participates 105 hours,
A short-term rental (STR 1) with a net income of $4,000 in which Ryan participates 110 hours,
A short-term rental (STR 2) with a net loss of $3,000 in which Ryan participates 160 hours, and
A short-term rental (STR 3) with a net income of $6,000 in which Ryan participates 125 hours.
Assume Ryan does not meet any material participation test for any short-term rental because contractors put in more hours than he does.
The long-term residential rental is a §469 rental activity, so it is not an SPA and the $12,000 loss is passive. Ryan’s income is too high to use the §469(i) active participation exception.
The three short-term rentals are SPAs. Because Ryan’s combined participation in all SPAs is only 395 hours, he does not materially participate in them; however, the SPA recharacterization rule applies because all SPAs have combined net income of $7,000 (70% of the total net income of $10,000 from the two profitable SPAs).
Ryan has $15,000 of passive losses, $3,000 of passive income, and $7,000 of nonpassive income (70% of $4,000 plus 70% of $6,000), even though all activities are §469 passive activities under the normal rules. After netting, he will recognize $7,000 of nonpassive income for this tax year.
This example is based on Treas. Reg. §1.469-2T(f)(2)(iii).
Net Investment Income Tax Impacts
To the extent income from a trade or business is recharacterized as nonpassive under Treas. Reg. §1.469-2T(f)(2), it is not a passive activity for §1411 purposes with respect to that income. See Treas. Reg. §1.1411-5(b)(2)(i). Therefore, that income is not subject to the net investment income tax (NIIT).
Example 3 - Investor Ivory
Ivory is a full-time single computer engineer earning $300,000 in wages, but she owns 10% of an S corporation restaurant. She works a few hours a week, totaling 150-200 hours per year. Her pass-through income is typically $50,000 annually.
The restaurant activity is an SPA to Ivory, and she does not materially participate in it under any of the seven material participation tests. However, under the SPA recharacterization rule, the income is nonpassive to Ivory and not subject to the NIIT.
A tax professional who is unaware of the rule and indicates her interest as passive will erroneously self-assess $1,900 of NIIT on her individual tax return.
Acknowledgements
I want to thank Paul Channo, EA, USTCP, Ryan Reichert, EA, USTCP, CFP, and Kelly Myers, EA, for their conversations with me on this issue. Only Kelly knew the SPA recharacterization rule existed; it just shows that the more one knows, the more one realizes that they do not know.
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Thank you for writing this! I heard about this through your Case Study with AICTP and I went down a research hole. Your examples helped my understanding
Tom, Great piece on the SPA. Your examples help bring it home.