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Business taxation

When a partnership interest is sold between brothers, are both Section 179 and bonus depreciation available for the purchaser?

Last updated: 
Sep 2025
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Answer

When a partnership interest is sold between brothers, the availability of Section 179 expensing and bonus depreciation (under Section 168(k)) for the purchaser with respect to basis adjustments (such as a Section 743(b) adjustment) is subject to specific anti-churning and related-party rules. The analysis for each is as follows:

1. Section 179 Expensing

Related-Party Limitation:- Section 179(d)(2)(A) provides that property is not considered "acquired by purchase" (and thus is not eligible for Section 179 expensing) if it is acquired from a related person. For this purpose, "related person" includes members of a family, and under Section 267(c)(4), "family" includes brothers and sisters, spouse, ancestors, and lineal descendants.

Application to Sale Between Brothers:- If a partnership interest is sold from one brother to another, the purchaser is acquiring the interest from a related person.- As a result, any basis adjustment to partnership property under Section 743(b) that arises from this sale is not considered to be "acquired by purchase" for Section 179 purposes.- Therefore, the purchaser cannot claim Section 179 expensing on the basis adjustment resulting from the purchase of the partnership interest from his brother.

2. Bonus Depreciation (Section 168(k))

Related-Party and Prior Use Limitations:- Under Section 168(k) and the regulations at Treas. Reg. §1.168(k)-2, bonus depreciation is generally not available for property acquired from a related person as defined in Section 179(d)(2)(A), which includes brothers.- The regulations also require that, for used property, the taxpayer (here, the purchaser) must not have previously used the property, and the property must not be acquired from a related party.

Aggregate vs. Entity Approach:- For partnership basis adjustments (such as Section 743(b)), the prevailing view (supported by policy and analogous rules under Section 197) is that the relatedness and prior use tests are applied at the partner level, not the partnership level.- Thus, the purchaser of the partnership interest is treated as if he directly acquired his share of the partnership’s underlying property from the selling brother.

Application to Sale Between Brothers:- Because the purchaser and seller are brothers, they are related under Section 179(d)(2)(A) and Section 267(c)(4).- Therefore, the basis adjustment under Section 743(b) is not eligible for bonus depreciation under Section 168(k), as it is treated as acquired from a related party.

3. Summary Table

Deduction Type Available to Purchaser? Reason
Section 179 Expensing No Property acquired from a related person (brother) is not eligible
Bonus Depreciation No Basis adjustment treated as acquired from a related person (brother) is not eligible

4. Additional Considerations

  • The same result would apply to basis adjustments under Section 734(b) (redemptions) and notional adjustments under Section 704(c) (remedial allocations) if the relevant transfer is between related parties.
  • If the sale were between unrelated parties, and the purchaser had not previously used the property, both Section 179 and bonus depreciation could potentially be available, subject to other requirements.

Conclusion: When a partnership interest is sold between brothers, neither Section 179 expensing nor bonus depreciation is available to the purchaser for the basis adjustment under Section 743(b), because the acquisition is from a related person as defined in the Internal Revenue Code and Treasury Regulations.

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