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. Reported under the Corporate Transparency Act and FinCEN rules — 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) requiring most U.S. entities to report beneficial-ownership information to FinCEN. 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 the trust is a separate entity for estate-tax purposes.
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. One-year-and-a-day is the threshold.
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
- A series of IRS programs (now consolidated) under which taxpayers with undisclosed foreign accounts could come into compliance on defined terms. See FBAR.
- Opportunity zone
- A designated low-income census tract; investment of capital gain into a qualified opportunity fund permits deferral and partial exclusion under §1400Z-2.
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 the applicable exclusion amount. Indexed annually.
- 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 May 2026