[Code of Federal Regulations]
[Title 26, Volume 13]
[Revised as of April 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 26CFR]

[Page 478-479]
 
                       TITLE 26--INTERNAL REVENUE
 
    CHAPTER I--INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY 
                               (CONTINUED)
 
Procedure and Administration--Table of Contents
 
Sec.  1.6661-5  Items relating to tax shelters.

    (a) In general. (1) Tax shelter items (as defined in paragraph (c) 
of this section) are treated as if such items were shown properly on the 
return for the taxable year in computing the amount of tax shown on the 
return if--
    (i) There is or was substantial authority for the tax treatment of 
the items (as provided in Sec.  1.6661-3); and
    (ii) The taxpayer reasonably believes at the time the return is 
filed that the tax treatment claimed is more likely than not the proper 
tax treatment of the items (see paragraph (d) of this section).

Thus, for purposes of section 6661, the tax attributable to such items 
is not included in the understatement for the year. (See paragraph 
(d)(2) of Sec.  1.6661-2.)
    (2) Disclosure (whether or not adequate under Sec.  1.6661-4) with 
respect to tax shelter items (as defined in paragraph (c) of this 
section) does not affect the amount of the understatement.
    (b) Tax shelter--(1) In general. For purposes of section 6661, the 
term ``tax shelter'' means--
    (i) A partnership or other entity (such as a corporation or trust),
    (ii) An investment plan or arrangement, or
    (iii) Any other plan or arrangement, if the principal purpose of the 
entity, plan, or arrangement, based on objective evidence, is the 
avoidance or evasion of Federal income tax. The principal purpose of an 
entity, plan or arrangement is the avoidance or evasion of Federal 
income tax if that purpose exceeds any other purpose. See Sec.  1.269-
3(a). Typical of tax shelters are transactions structured with little or 
no motive for the realization of economic gain, and transactions that 
utilize the mismatching of income and deductions, overvalued assets or 
assets with values subject to substantial uncertainty, nonrecourse 
financing, financing techniques which do not conform to standard 
commercial business practices, or the mischaracterization of the 
substance of the transaction. The existence of economic substance does 
not of itself establish that a transaction is not a tax shelter if the 
transaction includes other characteristics that indicate it is a tax 
shelter.
    (2) Principal purpose. The principal purpose of an entity, plan or 
arrangement is not the avoidance or evasion of Federal income tax if the 
entity, plan or arrangement has as its purpose the claiming of 
exclusions from income, accelerated deductions or other tax benefits in 
a manner consistent with the statute and Congressional purpose. For 
example, an entity, plan or arrangement will not be considered to have 
as its principal purpose the avoidance or evasion of Federal income tax 
merely as a result of the following uses of tax benefits provided by the 
Internal Revenue Code: The claiming of the investment credit under 
section 38; the purchase or holding of an obligation bearing interest 
which is excluded from gross income under section 103; entering into a 
safe-harbor lease transaction under section 168(f)(8); taking an 
accelerated cost recovery system (ACRS) allowance under section 168; 
taking the percentage depletion allowance under section 613 or section 
613A; deducting intangible drilling and development costs as expenses 
under section 263(c); establishing a qualified retirement plan under the 
provisions of sections 401-409A, claiming the possession tax credit 
under section 936; or claiming tax benefits available by reason of an 
election under section 992 to be taxed as a domestic international sales 
corporation (DISC), under section 927(f)(1) to be taxed as a foreign 
sales corporation (FSC), or under section 1362 to be taxed as an S 
corporation.
    (c) Tax shelter item. An item of income, gain, loss, deduction or 
credit

[[Page 479]]

will be considered a ``tax shelter item'' if the item is directly or 
indirectly attributable to the principal purpose of a tax shelter to 
avoid or evade Federal income tax. Thus, if a partnership is established 
for the principal purposes of the avoidance or evasion of Federal income 
tax by acquiring and overvaluing property for the purpose of claiming 
the investment credit under section 38, the investment credit with 
respect to the property would be a tax shelter item. However, a 
deduction claimed in connection with a separate transaction carried on 
by the same partnership is not a tax shelter item if the transaction 
does not constitute a plan or arrangement the principal purpose of which 
is the avoidance or evasion of tax.
    (d) Reasonable belief. For purposes of section 6661, a taxpayer will 
be considered reasonably to believe that the tax treatment of an item is 
more likely than not the proper tax treatment if--
    (1) The taxpayer analyzes the pertinent facts and authorities in the 
manner described in Sec.  1.6661-3(b)(3) and, in reliance upon that 
analysis, reasonably concludes that there is a greater than 50-percent 
likelihood that the tax treatment of the item will be upheld in 
litigation if the claimed treatment is challenged by the Internal 
Revenue Service; or
    (2) The taxpayer in good faith relies on the opinion of a 
professional tax advisor, if the opinion is based on the tax advisor's 
analysis of the pertinent facts and authorities in the manner described 
in Sec.  1.6661-3(b)(3) and unambiguously states that the tax advisor 
concludes that there is a greater than 50-percent likelihood that the 
tax treatment of the item will be upheld in litigation if the claimed 
tax treatment is challenged by the Internal Revenue Service.
    (e) Pass-through entities. In the case of tax shelter items (as 
defined in paragraph (e) of this section) attributable to a pass-through 
entity (as defined in Sec.  1.6661-4(e)), the actions described in 
paragraphs (d) (1) and (2) of this section, if taken by the entity, will 
be deemed to have been taken by the taxpayer and will be considered in 
determining whether the taxpayer reasonably believes that the tax 
treatment of an item is more likely than not the proper tax treatment.

[T.D. 8017, 50 FR 12017, Mar. 27, 1985]