What does Internal Revenue Code section 2036(a) pull back into the gross estate?
It pulls back the transferred property itself, not the entity interest held at death. Internal Revenue Code section 2036(a) includes in the gross estate “the value of all property to the extent of any interest therein of which the decedent has at any time made a transfer (except in case of a bona fide sale for an adequate and full consideration in money or money’s worth), by trust or otherwise, under which he has retained for his life” either “(1) the possession or enjoyment of, or the right to the income from, the property, or (2) the right, either alone or in conjunction with any person, to designate the persons who shall possess or enjoy the property or the income therefrom.” Subsection (b) adds that retaining the right to vote shares of a controlled corporation “shall be considered to be a retention of the enjoyment of transferred property.” The property then goes back in at its own value, so a discount claimed on the interest stops doing any work.
That structure is why a section 2036 case is not an appraisal case. The Fifth Circuit, in Estate of Strangi v. Commissioner, 417 F.3d 468 (5th Cir. 2005), called it “one of several provisions of the Internal Revenue Code intended to prevent parties from avoiding the estate tax by means of testamentary substitutes that permit a transferor to retain lifetime enjoyment of purportedly transferred property.”
The reach extends past the contribution: Estate of Bongard v. Commissioner held that where the decedent had given away part of his partnership interest within three years of death, and the retained portion triggered section 2036(a)(1), section 2035(a) applied to the gifted slice as well. What the Code does allow on a gift of a family-entity interest is covered at Minority discounts on gifts of family stock and in Family entities and transfer restrictions, and section 2036 can make it moot.
What is the retained-enjoyment theory, and what is an implied agreement under section 2036(a)(1)?
The theory is that the decedent went on benefiting from the contributed property after the paperwork said it belonged to the partnership, and the understanding need not be written down. Treasury Regulation §20.2036-1(c)(1)(i) states that “[a]n interest or right is treated as having been retained or reserved if at the time of the transfer there was an understanding, express, or implied, that the interest or right would later be conferred.” The same regulation, at §20.2036-1(b)(2), treats enjoyment as retained to the extent it “is to be applied toward the discharge of a legal obligation of the decedent, or otherwise for his pecuniary benefit.”
Estate of Strangi is the clearest appellate illustration. The Fifth Circuit held that a transferor retains possession or enjoyment under section 2036(a)(1) “if he retains a ‘substantial present economic benefit’ from the property, as opposed to ‘a speculative contingent benefit which may or may not be realized,’” quoting United States v. Byrum, 408 U.S. 125 (1972). Two facts carried the implied-agreement finding, both conduct rather than drafting: distributions after death to pay funeral costs, administration expenses, bequests and personal debts, which the court called “strong circumstantial evidence of an understanding”; and continued occupancy of the transferred house, where rent recorded on the books in 1994 was not paid until 1997, a deferral that “in itself, provides a substantial economic benefit.”
The standard of review matters as much as the test: the Fifth Circuit said the implied-agreement determination “is a finding of fact and is reviewed only for clear error.” Estate of Bongard v. Commissioner reached the same conclusion on one of its two transfers, finding that the decedent “exercised practical control” over the partnership and “limited its function to simply holding title,” and concluding that “an implied agreement existed that allowed decedent to retain the enjoyment of the property held by BFLP.” Chiechi, J., concurring in part and dissenting in part in Estate of Bongard v. Commissioner, joined by Wells and Foley, JJ., argued that the majority’s holding “is rejected by the statute and by United States v. Byrum, 408 U.S. 125 (1972), which the majority opinion does not even cite” — the fault line either side will stand on.
What is the bona fide sale for full and adequate consideration exception, and what do courts require to meet it?
It is the parenthetical inside section 2036(a) itself, and meeting it ends the inquiry. Treasury Regulation §20.2043-1(a) supplies the general content: the transfer “must have been made in good faith, and the price must have been an adequate and full equivalent reducible to a money value.” Estate of Strangi v. Commissioner treats those as “two discrete requirements: (1) a ‘bona fide sale’, and (2) ‘adequate and full consideration’,” both of which “must be satisfied for the exception to apply.”
The Tax Court’s formulation in Estate of Bongard v. Commissioner, 124 T.C. 95, 118 (2005), is the one most often quoted: the exception “is met where the record establishes the existence of a legitimate and significant nontax reason for creating the family limited partnership, and the transferors received partnership interests proportionate to the value of the property transferred.” It then narrows what counts: “The objective evidence must indicate that the nontax reason was a significant factor that motivated the partnership’s creation,” and “[a] significant purpose must be an actual motivation, not a theoretical justification.” Laro, J., concurring in result and joined by Marvel, J., wrote separately against that test, saying he “would apply the longstanding and well-known business purpose test of Gregory v. Helvering, 293 U.S. 465 (1935).”
The consideration prong is more mechanical. Kimbell v. United States, 371 F.3d 257 (5th Cir. 2004), directs attention to whether the interests credited to each partner “was proportionate to the fair market value of the assets each partner contributed,” whether contributions “were properly credited to the respective capital accounts,” and whether on termination the partners were entitled to distributions “in amounts equal to their respective capital accounts.” Estate of Strangi v. Commissioner summarized the effect: where assets go in for a proportional interest, the requirement “will generally be satisfied, so long as the formalities of the partnership entity are respected.”
That prong is judged objectively. Estate of Strangi v. Commissioner held the inquiry “purely objective” and that “a sale is bona fide if, as an objective matter, it serves a ‘substantial business [or] other non-tax’ purpose,” attributing the standard to Kimbell. The Third Circuit put it differently in Estate of Thompson v. Commissioner, 382 F.3d 367 (3d Cir. 2004): a good faith transfer “must provide the transferor some potential for benefit other than the potential estate tax advantages that might result from holding assets in the partnership form.” The Ninth Circuit, in Estate of Bigelow v. Commissioner, 503 F.3d 955 (9th Cir. 2007), observed that “[c]ourts that have considered this issue hold uniformly that an objective standard is applied.”
Which decisions went for the taxpayer, and which facts drove the result?
Kimbell v. United States, 371 F.3d 257 (5th Cir. 2004), is the leading taxpayer win, and posture mattered as much as the facts. The Fifth Circuit vacated and remanded, holding that the district court “erred in finding as a matter of law that (1) family members can not enter into a bona fide transaction, and (2) a transfer of assets in return for a pro rata partnership interest is not a transfer for full and adequate consideration.” The record showed unchallenged non-tax business reasons, active management of oil and gas working interests and respected formalities, and “[t]he government raised no issues of material fact in its motion for summary judgment and challenged none of the taxpayer’s facts.”
Estate of Black v. Commissioner, 133 T.C. 340 (2009), is the Tax Court’s. It found the partnership formed “for a legitimate and significant nontax purpose; i.e., to perpetuate the holding of Erie stock by the Black family,” and held that because the transfer “constituted a bona fide sale for adequate and full consideration for purposes of section 2036(a), the fair market value of that stock is not includable in Mr. Black’s gross estate under either section 2036(a)(1) or (2).” Relying on Estate of Bongard v. Commissioner and Estate of Schutt v. Commissioner, T.C. Memo. 2005-126, Estate of Black v. Commissioner also settled a recurring point: “a family limited partnership that does not conduct an active trade or business may nonetheless be formed for a legitimate and significant nontax reason.”
Estate of Bongard v. Commissioner shows the question is transaction-by-transaction rather than family-by-family. The court held the decedent’s transfer of operating company stock to a holding company “satisfies the bona fide sale exception of section 2036(a),” because positioning that company for a corporate liquidity event “was a legitimate and significant nontax reason.” On the next step — contributing the resulting units to the family limited partnership — it held the opposite, finding the decedent “recycled the value” of those units and that the transfer “did not satisfy the bona fide sale exception.” Same decedent, same advisers; different result, because one entity was doing something and the other held title.
The government’s wins share a shape. Estate of Thompson v. Commissioner affirmed because “neither the Thompson Partnership nor Turner Partnership conducted any legitimate business operations, nor provided decedent with any potential non-tax benefit from the transfers.” Estate of Bigelow v. Commissioner affirmed findings of an implied agreement that the decedent would have access to income from transferred residential rental real property and “continued to enjoy the economic benefit that the property secured her personal debt.” Estate of Strangi v. Commissioner worked through five proffered non-tax rationales and affirmed the rejection of each. None of those opinions is about valuing the interest.
Why is a section 2036 problem so hard to repair after the fact?
Because nearly every fact that decides it was made before anyone considered litigation, and because the deductions that might absorb an inclusion do not always follow it. Estate of Turner v. Commissioner, 138 T.C. 306 (2012), is the cautionary case on the second point: the estate argued that if section 2036 pulled underlying assets back in, a formula marital clause should carry an increased marital deduction with them. The Tax Court refused: “[n]either the partnership interest that Clyde Sr. transferred by gift nor the underlying assets passed or could pass to Jewell as a beneficial owner,” so under Treasury Regulation §20.2056(c)-2(a) they are not considered as passing to the surviving spouse. The court used “mismatch” for a different problem — inclusion at asset value against a marital deduction measured by the discounted partnership interest — which it said was not present on these facts and left “for another day.”
The first point is structural. Whether there was an implied understanding is inferred, as Estate of Bongard v. Commissioner puts it, “from the circumstances surrounding a transfer of property and the subsequent use of the transferred property” — the distribution history, the rent paid or not paid, whether the entity made an investment, and what the decedent was left holding outside it. Estate of Strangi v. Commissioner observed that the decedent “retained assets barely sufficient to meet his own living expenses for the low end of his life expectancy.” None of that can be redone at audit. The motive prong looks backward to formation for the same reason: Estate of Bongard v. Commissioner requires an actual motivation, not a theoretical justification, and Kimbell v. United States survived summary judgment because those reasons were already in the record.
Every authority here is federal, and each was read in a primary source on September 15, 2026. Nothing here states what governs any particular transfer; applying it is counsel’s work and then the retained expert’s. This Institute publishes no discount figure and no table of court-allowed discounts. Where a buy-sell agreement rather than an entity does the work, a different Code section controls — see Does a buy-sell agreement fix estate tax value? — and the standard of value underlying all of it is covered at Estate and gift valuation.