A working glossary
The recurring terms in luxury-asset taxation — statutory labels, judicial doctrines, structural shorthand — each defined in one or two sentences and cross-linked to the deeper entries on this site.
The vocabulary of luxury-asset taxation borrows from estate planning, partnership tax, international tax, customs law, and admiralty. A term that means one thing under the Internal Revenue Code may mean something narrower under a state sales-tax statute and something different again in a foreign tax treaty. The definitions below are short by design — they orient the reader and link to the page where each concept is treated in full.
A
- Ad valorem tax
- A tax assessed as a percentage of value rather than as a flat fee. Property taxes, customs duties, and many luxury excises are ad valorem.
- Adjusted basis
- The original cost of property, increased by capital improvements and decreased by depreciation, casualty losses, and certain other items. Gain or loss on sale is measured against adjusted basis.
- Allocation (sales/use tax)
- The state-by-state apportionment of a mobile asset's tax base — applied to aircraft, yachts, and rolling stock that operate across multiple jurisdictions.
- Alternative minimum tax (AMT)
- A parallel federal income-tax computation that limits the use of certain preferences. Relevant to luxury planning chiefly through depreciation and certain incentive items.
- Arm's-length
- A transaction priced as it would be between unrelated parties. Used by the IRS to test transfers involving family members, related entities, and trusts.
B
- Basis
- The amount invested in property for tax purposes. See also adjusted basis and step-up in basis.
- Beneficial ownership
- The natural person who ultimately owns or controls an entity, distinct from the legal record owner. Under FinCEN’s rules as amended in 2025–2026, BOI reporting under the Corporate Transparency Act now applies only to certain foreign entities registered to do business in a U.S. state — see Beneficial Ownership Information.
- Bona fide residency
- The substantive presence and intent required to claim residence in a state or country for tax purposes — see state residency.
- Boot
- Cash or other non-like-kind property received in a §1031 exchange; boot is taxable to the extent of gain realized.
C
- Capital asset
- Property held other than inventory, depreciable trade-or-business property, and certain other excluded categories. Most luxury holdings — art, jewelry, vintage cars held personally — are capital assets under §1221.
- Capital gain
- Gain on the sale of a capital asset. Long-term if the holding period exceeds one year; short-term otherwise.
- Charitable remainder trust (CRT)
- A split-interest trust paying an income stream to non-charitable beneficiaries for a term or for life, with remainder to a qualified charity. See CRT.
- Collectible
- Defined at §408(m): works of art, rugs, antiques, metals, gems, stamps, coins, alcoholic beverages, and any other tangible personal property specified by Treasury. Long-term gain on collectibles is taxed at a maximum 28% rate — see collectibles rate.
- Common reporting standard (CRS)
- The OECD framework for automatic exchange of financial-account information among participating jurisdictions. The United States does not participate but operates a parallel regime through FATCA.
- Corporate Transparency Act (CTA)
- Federal statute (31 U.S.C. §5336, enacted 2021) authorising beneficial-ownership reporting to FinCEN. Under FinCEN’s March 2025 interim final rule and August 2026 final rule, U.S.-formed companies and U.S. persons are exempt; only certain foreign entities registered to do business in a U.S. state must report. See BOI reporting.
- Customs valuation
- The price actually paid or payable for goods on importation, as determined under the WTO Valuation Agreement and 19 U.S.C. §1401a. Drives duty assessment.
D
- Depreciation
- The recovery of the cost of business or income-producing property over its useful life under §167 and §168. Aircraft, yachts in charter, and real-estate improvements may all be depreciable. See depreciation.
- Domicile
- The single place a person treats as a true, fixed, permanent home — distinct from residence. Determines liability for state estate and inheritance taxes.
- Domestic asset protection trust (DAPT)
- A self-settled spendthrift trust authorized by statute in certain U.S. states (Nevada, South Dakota, Delaware, Alaska, others), used for asset protection and sometimes for income-tax sourcing.
- Dynasty trust
- A trust drafted to last for the maximum period permitted by the situs jurisdiction — perpetual in several states — used to compound assets free of estate and GST tax for successive generations. See GST trusts.
E
- Estate tax
- The federal tax imposed on the transfer of the taxable estate at death under §2001. See estate tax and Form 706.
- Excise tax
- A tax on specific transactions or commodities — fuel, certain transportation, certain communications, and historically the luxury excise on jewelry, furs, and aircraft.
F
- FATCA
- The Foreign Account Tax Compliance Act (chapter 4 of the Code, §§1471–1474). Imposes withholding on non-compliant foreign financial institutions and reporting on certain U.S. owners of foreign accounts via Form 8938.
- FBAR
- Foreign Bank Account Report, FinCEN Form 114, filed under the Bank Secrecy Act by U.S. persons with foreign financial-account interests exceeding $10,000 in aggregate at any point in the year. See FBAR.
- Form 8300
- Cash-transaction report required of trades or businesses receiving more than $10,000 cash in one or related transactions, under §6050I. See Form 8300.
- Fractional interest
- A partial undivided ownership share in property, used for shared aircraft programs and for estate-tax discount planning on art and real estate.
- Freeport
- A bonded warehouse where goods may be stored without payment of import duty or VAT until released into the local market. See freeport storage.
G
- Generation-skipping transfer (GST) tax
- A separate federal transfer tax under chapter 13 of the Code, imposed on transfers to persons two or more generations below the transferor. See GST tax.
- Gift tax
- Federal tax on lifetime transfers without full consideration, under chapter 12 of the Code. Annual exclusion and unified credit reduce the tax. See gift tax.
- Grantor trust
- A trust whose income is attributed to the settlor for income-tax purposes under §§671–679, even though, if properly drafted, the trust’s assets may be excluded from the grantor’s gross estate (the “intentionally defective” grantor trust).
H
- Hobby loss rule
- §183. Limits deductions for activities not engaged in for profit. Routinely applied to thoroughbred racing, yacht charter, and collector-vehicle ventures.
- Holding period
- The length of time property is held, which determines short-term versus long-term capital-gain treatment. Long-term treatment requires a holding period of more than one year.
I
- Inclusion event
- An event triggering recognition of deferred gain in a qualified opportunity fund; defined at Treas. Reg. §1.1400Z2(b)-1.
- Installment sale
- A sale in which at least one payment is received after the close of the tax year of sale; gain is reported as payments are received under §453. Not available on dealer property or publicly traded property.
- Inversion
- A change in the legal residence of an entity (typically by reincorporation abroad) intended to reduce tax. Anti-inversion rules at §7874 apply principally to corporate transactions.
J
- Joint and several liability
- Liability under which each party can be pursued for the full amount. Significant in spousal returns and in transferee liability under §6901.
L
- Like-kind exchange
- Tax-deferred exchange of qualified property under §1031. Since the 2017 amendment, available only for real property held for productive use or investment. See like-kind exchanges.
- Listed property
- Property subject to heightened substantiation requirements under §280F, including passenger automobiles, certain aircraft, and certain property used for entertainment. Personal use limits deduction.
- Long-term capital gain
- Gain on a capital asset held more than one year. Generally taxed at preferential rates, except for collectibles (28%) and unrecaptured §1250 gain (25%).
M
- MACRS
- Modified Accelerated Cost Recovery System — the depreciation system applicable to most tangible property placed in service after 1986, codified at §168.
- Marital deduction
- The unlimited estate- and gift-tax deduction for transfers to a U.S.-citizen spouse, under §§2056 and 2523.
N
- Net investment income tax (NIIT)
- The 3.8% surtax under §1411 on net investment income of high-income individuals, estates, and trusts. Stacks with capital-gains rates and the collectibles rate.
- Nexus
- The minimum connection between a taxpayer and a state required for the state to impose tax. Relevant to luxury planning principally for sales, use, and income tax on mobile assets.
O
- Offshore voluntary disclosure
- IRS programs under which taxpayers with undisclosed foreign accounts could come into compliance on defined terms. The Offshore Voluntary Disclosure Program closed in September 2018; potentially willful noncompliance is now handled through the IRS Criminal Investigation Voluntary Disclosure Practice, and non-willful cases through the Streamlined Filing Compliance Procedures. See FBAR.
- Opportunity zone
- A designated low-income census tract; investment of capital gain into a qualified opportunity fund permits deferral of the reinvested gain and, after ten years, exclusion of post-investment appreciation under §1400Z-2. The One Big Beautiful Bill Act (Pub. L. 119-21) made the regime permanent, with new zone designations and a rolling deferral period for investments made after 2026.
P
- Part 91 (FAA)
- 14 C.F.R. Part 91 — the FAA rules governing non-commercial general aviation. The default regime for private-aircraft owner-flown operations. See Part 91 vs. Part 135.
- Part 135 (FAA)
- 14 C.F.R. Part 135 — the FAA rules governing on-demand commercial charter operations. Required when the aircraft is held out for hire to the public.
- Passive activity
- A trade or business in which the taxpayer does not materially participate, under §469. Passive losses are limited to passive income. Critical to charter and rental structures.
- Private placement life insurance (PPLI)
- A variable life policy with customized, non-publicly-marketed investment options, designed to provide tax-free inside buildup. See PPLI.
Q
- Qualified appraisal
- An appraisal meeting the requirements of §170(f)(11) and Treas. Reg. §1.170A-17, required to substantiate a non-cash charitable contribution above defined thresholds.
- Qualified opportunity fund (QOF)
- An entity that holds at least 90% of its assets in qualified opportunity-zone property, eligible to receive deferred-gain investments under §1400Z-2.
R
- Realization event
- The taxable event — typically sale or exchange — that converts an unrealized economic gain into recognized gain under §1001.
- Recapture
- The conversion of prior depreciation deductions back to ordinary income on disposition, under §1245 (personalty) or §1250 (real property).
- Residency
- The standard by which a state or country determines its income-tax claim on a person. Tests include statutory day-count, domicile, and statutory residence presumptions.
S
- Section 1031 exchange
- See like-kind exchange.
- Section 6166
- Allows deferral of estate tax attributable to a closely held business interest, payable in installments over up to fourteen years.
- Section 6050I
- The cash-reporting statute requiring trades or businesses to file Form 8300 when receiving more than $10,000 in cash. See §6050I.
- Situs
- The legal location of property or of a trust. Determines estate-tax jurisdiction, choice-of-law, and certain reporting obligations.
- Step-up in basis
- The adjustment of property basis to fair market value at the decedent's death under §1014, effectively eliminating built-in gain on appreciated assets that pass through an estate.
T
- Trade or business
- An activity carried on continuously, regularly, and for profit. Distinguished from a hobby (§183) and from a passive activity (§469).
- Trust situs
- The jurisdiction whose law governs a trust and where it is treated as resident. Choice of situs is a primary lever in dynasty-trust planning.
U
- Unified credit
- The credit at §2010 against estate and gift tax, equivalent to tax on the applicable exclusion amount. The basic exclusion amount is $15,000,000 for 2026 (Rev. Proc. 2025-32), indexed for inflation from 2027.
- Use tax
- A complementary tax to sales tax, imposed on the use, storage, or consumption of tangible personal property within a state when sales tax was not collected at purchase. See sales and use tax.
V
- Valuation discount
- A reduction in the appraised value of a transferred interest reflecting lack of marketability or lack of control. Heavily litigated in estate-tax contexts involving family entities and fractional art interests.
- VAT (value added tax)
- A consumption tax levied at each stage of production and distribution, common throughout the European Union and the United Kingdom. See VAT on art and luxury.
W
- Wealth tax
- A periodic tax on the net wealth of a taxpayer. Imposed in a handful of jurisdictions (Switzerland cantonally, Spain, Norway) and historically considered in others. See wealth taxes.
- Worldwide income
- The principle, applied by the United States and a small number of other countries, of taxing residents and citizens on all income regardless of source.
Primary Sources
- Internal Revenue Code, Title 26, U.S. Code — law.cornell.edu/uscode/text/26.
- Treasury Regulations, Title 26, Code of Federal Regulations.
- 31 U.S.C. §5336 (Corporate Transparency Act).
- 31 U.S.C. §5314 (Bank Secrecy Act, FBAR authority).
- 26 U.S.C. §§1471–1474 (FATCA, chapter 4).
- 14 C.F.R. Parts 91 and 135 (Federal Aviation Regulations).
- 19 U.S.C. §1401a (customs valuation).
- OECD, Standard for Automatic Exchange of Financial Account Information (CRS).
Reviewed October 2026