Tifd Iii-E, Inc. v. United States, 666 F.3d 836

Castle Harbour is an eight-year partnership formed by GECC subsidiaries and two Dutch banks (ING Bank N.V. and Rabobank N.V.) with the banks contributing $117.5 million; GECC contributed assets including a depreciated aircraft fleet.
The partnership agreement allocated 98% of Operating Income to the banks, while allowing the taxpayer to reclassify income as Disposition Gains to itself, reducing tax exposure.
Exhibit E and capital/investment accounts, plus a Class A Guaranteed Payment and other protections, were designed to ensure the banks recover their investment at the Applicable Rate regardless of partnership profits or losses.
The district court on remand held the banks qualified as §704(e)(1) capital interests, despite earlier Culbertson-based finding that their interest resembled a secured lender.
The Second Circuit previously concluded the banks’ interest was not bona fide equity participation, and remanded to consider whether §704(e)(1) could still treat them as partners; on review, the court again found it did not.
The court also addressed penalties under §6662(d), holding substantial authority did not support treating the banks as equity, thus imposing a substantial understatement penalty on the taxpayer.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether banks qualify as partners under §704(e)(1).	TIFD argued banks hold a capital interest in Castle Harbour.	United States contends the banks do not hold a capital interest under §704(e)(1).	Banks do not qualify as a capital interest under §704(e)(1).
Whether substantial authority supports the treatment of banks as partners for §6662(d) penalties.	TIFD claimed substantial authority supports partnership treatment.	United States argued there is not substantial authority for partnership treatment.	Penalty for substantial understatement properly imposed.

Commissioner v. Culbertson, 337 U.S. 733 (1949) (totality-of-the-circumstances test for equity vs debt in partnership interests)
O.P.P. Holding Corp., 76 F.2d 11 (2d Cir.1935) (debt-like instruments treated as debt, not equity, for tax purposes)
Jewel Tea Co. v. United States, 90 F.2d 451 (2d Cir.1937) (distinguishes equity-like preferred shares from debt-like instruments)
Bateman v. United States, 490 F.2d 549 (9th Cir.1973) (discussion of ownership and transfer issues in partnership interests)
Dyer v. Commissioner, 211 F.2d 500 (2d Cir.1954) (respecting substantial contribution and participation in joint ventures)
Slifka v. Commissioner, 182 F.2d 345 (2d Cir.1950) (joint venture purposes and tax treatment considerations)