In the recent Memorandum Opinion Tibor Gyarmati v. Commissioner of Internal Revenue, T.C. Memo. 2026-27, the United States Tax Court addressed fundamental principles regarding the substantiation of basis in real property, the allocation of sale proceeds to personal property, and the assessment of additions to tax for unfiled returns. The case highlights a critical area of tax practice: the rigid documentation requirements taxpayers face when attempting to offset capital gains through alleged basis increases and purchase price allocations. For CPAs and Enrolled Agents, the ruling serves as a stark reminder of the limitations of the Cohan rule when a taxpayer’s records are fundamentally deficient and their testimony lacks credibility.

Factual Background

The petitioner, Tibor Gyarmati, operated several car dealerships and held an American Society of Interior Designers (ASID) license, which allowed him to purchase furnishings at wholesale prices. In February 1989, Mr. Gyarmati and his wife purchased an unfurnished 3,000-square-foot condominium in Marco Island, Florida, for $410,000. The taxpayer subsequently furnished the property and undertook various remodeling projects over the years.

In August 1992, the Florida condo sustained severe interior water and mold damage from Hurricane Andrew, requiring the replacement of floor coverings, wall coverings, drywall, and furnishings. Mr. Gyarmati sold the Florida condo in 2015 for $775,000. However, he failed to file his 2015 federal income tax return, prompting the Commissioner to prepare a substitute for return (SFR) under I.R.C. § 6020(b) and issue a Notice of Deficiency. The Commissioner assessed a tax deficiency of $860,547, along with severe additions to tax under I.R.C. §§ 6651(a)(1), 6651(a)(2), and 6654.

The Taxpayer’s Request for Relief

After significant concessions by both parties, the primary dispute centered on the computation of the capital gain from the sale of the Florida condo. Mr. Gyarmati argued that his capital gain should be substantially reduced based on two distinct positions. First, he contended that he was entitled to increase his adjusted basis in the condo by $95,000 to reflect capital improvements made after Hurricane Andrew (an amount well above the $18,574 already conceded by the Commissioner). Second, he argued that $62,500 of the $775,000 sale price should be allocated to furnishings allegedly sold with the condo, thereby reducing the amount realized on the real property itself. Furthermore, Mr. Gyarmati challenged the additions to tax, claiming he had reasonable cause for his failure to file, failure to pay, and failure to make estimated tax payments.

The Court’s Analysis of the Law

Judge Copeland began the analysis by reiterating the foundational rules of tax litigation: the Commissioner’s determinations are generally presumed correct, and the taxpayer bears the burden of proving otherwise pursuant to Rule 142(a)(1), INDOPCO, Inc. v. Commissioner, 503 U.S. 79, 84 (1992), and Welch v. Helvering, 290 U.S. 111, 115 (1933). The court emphasized that I.R.C. § 6001 and Treas. Reg. § 1.6001-1(a) require taxpayers to maintain sufficient records to enable the Commissioner to determine the correct tax liability.

When selling property, a taxpayer must recognize gain realized in excess of their adjusted basis under I.R.C. § 1001(a) and Treas. Reg. § 1.61-6(a). Taxpayers may increase their basis for capital improvements per I.R.C. § 1016(a) and Treas. Reg. § 1.1016-2(a), but they must prove these increases. The court acknowledged the long-standing precedent of the Cohan rule, which allows courts to estimate expenses when exact records are lacking, citing Cohan v. Commissioner, 39 F.2d 540, 543–44 (2d Cir. 1930). However, the court strictly conditioned this allowance by noting that "we must have some basis on which an estimate may be made," relying on Vanicek v. Commissioner, 85 T.C. 731, 743 (1985), and Lerch v. Commissioner, 877 F.2d 624, 627–29 (7th Cir. 1989), which ruled the Cohan doctrine inapplicable without evidentiary support for a reasonable estimate.

Regarding the additions to tax, the court cited I.R.C. § 6651(a)(1) and (a)(2), noting that relief requires the taxpayer to prove their failure was "due to reasonable cause and not due to willful neglect". The taxpayer must demonstrate ordinary business care and prudence under United States v. Boyle, 469 U.S. 241, 246 (1985), and Treas. Reg. § 301.6651-1(c)(1).

Application of the Law to the Facts

The Shortcomings in Documentation

The court’s application of the law exposed severe, fatal flaws in the taxpayer’s recordkeeping and documentation of basis. Judge Copeland found the taxpayer to lack credibility, noting his testimony was "vague, inconsistent, and oftentimes contradictory". Quoting Tokarski v. Commissioner, 87 T.C. 74, 77 (1986), the judge stated that the court is "not required to accept a taxpayer’s self-serving testimony".

On the issue of the $95,000 basis increase for remodeling, Mr. Gyarmati’s documentation was woefully inadequate. He attempted to substantiate the capital improvements by presenting a sales order for a metal wall bracket, a floor tile selection sheet, and an order form for two bathroom light fixtures, dated 1988, 1994, and 1989, respectively. The fatal flaw in this documentation was that all items were either purchased in Michigan or shipped to the taxpayer’s personal residence in Bloomfield Hills, Michigan. The taxpayer dubiously claimed that these items, including a $23,000 chandelier delivered to his Michigan home, were driven to Florida in dealership panel trucks and installed in the condo. The court outright rejected this, stating, "The record contains insufficient detail regarding the type of remodeling that was done at the condo," and held that they were "unable to estimate additional capital improvements made to the condo, if any, under the Cohan rule because we have no reasonable basis for making such an estimate".

The taxpayer’s attempt to allocate $62,500 of the sale price to furnishings met a similar fate due to poor documentation. Mr. Gyarmati admitted there was no sales contract for the Florida condo and no separate bill of sale itemizing the furnishings. To support his claim, he presented furniture invoices dating from 1984 to 1994, but all except one lacked any indication they were delivered to the Florida condo. The court pointed out severe logical inconsistencies in this documentation: the invoices "cumulatively accounted for more furniture sets than could possibly have fit into the Florida condo," and any surviving furniture would have been between 21 and 31 years old at the time of the 2015 sale. The court reasoned, "We find it unlikely that a buyer would have given much, if any, value to noncollectible furnishings that were so old".

Citing Peterson v. Commissioner, T.C. Memo. 1987-508, the court refused to artificially allocate the purchase price, ruling that Mr. Gyarmati "has failed to show that any amount of the purchase price was for furnishings, and we have no reasonable basis upon which to estimate the amount of the sale proceeds allocable to furnishings".

Furthermore, regarding the additions to tax under I.R.C. §§ 6651 and 6654, the taxpayer "offered no excuse for his failures to timely file a 2015 tax return and to pay the tax due". He presented zero contrary evidence to rebut the Commissioner’s account transcripts demonstrating his failure to file returns or make estimated payments.

Conclusions and Takeaways for Practitioners

Ultimately, the Tax Court concluded that Mr. Gyarmati’s gain on the Florida condo was $289,419 (based strictly on the $775,000 sale price minus transaction costs, the original $410,000 purchase price, and the undisputed $18,574 in improvements conceded by the IRS). His total gain from real estate sales for 2015 was determined to be $1,208,073, and the court held him liable for all additions to tax under sections 6651(a)(1), 6651(a)(2), and 6654.

For tax professionals, Gyarmati v. Commissioner underscores that the IRS and the Tax Court will rigorously scrutinize documentation for capital improvements and purchase price allocations. A taxpayer cannot rely on the Cohan rule to salvage deductions or basis increases when their underlying documentation fails to explicitly connect the expenditures to the specific property in question. Invoices showing delivery to a taxpayer’s primary residence will not substantiate basis improvements for a secondary home located in another state, regardless of self-serving testimony claiming the items were transported. Furthermore, any attempt to allocate real estate sale proceeds to personal property must be contemporaneously documented through a formal bill of sale or explicit terms in the closing documents, rather than relying on decades-old purchase invoices. Practitioners must advise clients that strict, specific, and contemporaneous recordkeeping under I.R.C. § 6001 is the only reliable defense against deficiency determinations.

Prepared with assistance from NotebookLM.