Revised nuclear decommissioning fund schedule is approved

Plain-English summary

A utility with a direct ownership interest in a nuclear power plant requested a revised schedule of deductible payments to its nuclear decommissioning fund. The proposed schedule followed public utility commission orders and an updated study of the plant's decommissioning costs. The IRS concluded that the utility was an eligible taxpayer, correctly calculated its share of the costs, and used reasonable assumptions consistent with IRC § 468A. It approved a level annual ruling amount for the redacted period, with the public release also redacting the dollar amount. Payments for any year cannot exceed the applicable ruling amount, and the taxpayer must attach the ruling and election statement to each return claiming a deduction. The IRS did not decide whether each study item is a qualifying decommissioning cost or whether the study meets industry standards.

Ruling snapshot

• Question: Does the proposed revised nuclear decommissioning fund contribution schedule meet IRC § 468A?
• Outcome: Approved for the redacted annual amount and period, subject to contribution and return-attachment conditions
• Key authorities: IRC § 468A; Treas. Reg. §§ 1.468A-1 through 1.468A-7

Full text (IRS public release)

 Internal Revenue Service                                         Department of the Treasury
                                                                  Washington, DC 20224

 Number: 202536006                                                Third Party Communication: None
 Release Date: 9/5/2025                                           Date of Communication: Not Applicable
 Index Number: 468A.04-02
                                                                  Person To Contact:

 ----------------------                                           ----------------, ID No. -----------------
 ---------------------------------------                          Telephone Number:

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 ---------------------------                                      Refer Reply To:
 --------------------------------------------                     CC:ECE:B02
 ----------------------------                                     PLR-105578-23
                                                                  Date:
                                                                  June 02, 2025




Re: ---------------------------------------------------------
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LEGEND

 Taxpayer              =    ----------------------------------------------------------------------------
 Parent                =    ---------------------------------------------------
 Plant                 =    --------------------------------------------------------------
 Location              =    ----------------------------------
 Percent               =    ------
 Date 1                =    ----------------------
 Date 2                =    --------------------------
 Commission            =    ------------------------------------------------------------------------
 Order 1               =    ----------------------------------------------------------------------------------
                            -------------
 Order 2               =    ----------------------------------------------------------------------------------
                            -------------------------------
 Study 1               =    ----------------------------------------------------------------------------------
                            ---------------------------------------------
 Study 2               =    ----------------------------------------------------------------------------------
                            ------------------------------------
 Method                =    --------------------------------------------------
 Year A                =    -------
 Year B                =    -------
 Year C                =    -------
 Year D                =    -------
 a                     =    -------------------
 b                     =    -----------------
 c                     =    -----------------
 Amount                =    -------------
PLR-105578-23                                2

 x                      = 5
 y                      = 7

Dear ---------------:

       This letter responds to your request, dated March 10, 2023, for a mandatory
revised schedule of ruling amounts under § 468A(d)(3) of the Internal Revenue Code
and § 1.468A-3(f)(1) of the Income Tax Regulations. The Internal Revenue Service
(Service) has approved previous requests for a schedule of ruling amounts for Plant,
most recently on Date 1. Information was submitted pursuant to § 1.468A-3(e)(2).

      Taxpayer represents that, at the time this ruling request was submitted, the facts
were as follows:

                                          FACTS

       Taxpayer is a member of an affiliated group that joins in the filing of a
consolidated U.S. federal income tax return, the common parent of which is Parent.
Parent files its consolidated U.S. federal income tax return with its affiliated companies,
including Taxpayer, on a calendar year basis using the accrual method of accounting.
Taxpayer has a direct ownership interest of Percent in Plant. The Plant is situated at
Location. The operating license for the Plant will expire on Date 2. With respect to the
decommissioning costs related to the Plant which are included in the Taxpayer’s cost of
service for ratemaking purposes, the Taxpayer is subject to regulation by Commission.
Taxpayer maintains a nuclear decommissioning fund (Fund).

       In Order 1 and Order 2, Commission established the amount of decommissioning
costs to be included in Taxpayer’s cost of service for ratemaking purposes. Order 1
relied on Study 1, which was subsequently updated as Study 2. The proposed method
of decommissioning the Plant is Method.

       It is estimated that substantial decommissioning costs will first be incurred in
Year A and that decommissioning will be substantially complete at the end of Year B.
The total estimated cost of decommissioning the Plant is $a (in Year C dollars) and the
Taxpayer’s share is $b (in Year C dollars). The total estimated future cost of
decommissioning Taxpayer’s share of the Plant is $c (in Year A dollars). To obtain the
estimated cost of decommissioning in Year A dollars, the estimated cost in Year C
dollars was escalated at the rate of x% annually to the year that the costs are expected
to be incurred. The assumed after-tax rate of return to be earned by the amounts
collected for decommissioning is y%.

                                    RULINGS REQUESTED

     Taxpayer requests the Service to issue a revised schedule of ruling amounts for
decommissioning costs for the Plant. Taxpayer requests that the schedule conform to
PLR-105578-23                                 3

the proposed schedule of ruling amounts, which aligns with the amount of
decommissioning costs approved of in Order 2.

                                   LAW AND ANALYSIS

       Sections 468A(a) and 1.468A-1(a) provide that a taxpayer that elects the
application of § 468A shall be allowed as a deduction for any taxable year the amount of
any payments made by the taxpayer to a nuclear decommissioning fund during such
taxable year. Section 1.468A-1(b)(1) provides that an eligible taxpayer is a taxpayer
that possesses a qualifying interest in a nuclear power plant. Under § 1.468A-1(b)(2),
the definition of the term “qualifying interest” includes a direct ownership interest.

       Sections 468A(b) and 1.468A-2(b)(1) provide that the amount of payments made
(or deemed made) by a taxpayer to a nuclear decommissioning fund during any taxable
year shall not exceed the ruling amount applicable to such fund for such taxable year.

       Section 468A(h) provides that a taxpayer shall be deemed to have made a
payment to a nuclear decommissioning fund on the last day of a taxable year if such
payment is made on account of such taxable year and is made within 2 ½ months after
the close of such taxable year.

        Section 468A(d)(1) provides that no deduction shall be allowed for any payment
to a nuclear decommissioning fund unless the taxpayer requests and receives from the
Secretary a schedule of ruling amounts. Section 468A(d)(2) provides that the term
“ruling amount” means, with respect to any taxable year, the amount which the
Secretary determines to be necessary to — (A) fund the total nuclear decommissioning
cost of a nuclear power plant over the estimated useful life of such plant, and (B)
prevent any excessive funding of such costs, or the funding of such costs at a rate more
rapid than level funding, taking into account such discount rates as the Secretary deems
appropriate. Section 468A(d)(3) provides that the Secretary shall at least once during
the useful life of the nuclear power plant (or more frequently, upon the request of the
taxpayer), review, and revise if necessary, the schedule of ruling amounts determined
under § 468A(d)(1).

       Section 1.468A-3(a)(1) provides that, in general, a schedule of ruling amounts for
a nuclear decommissioning fund is a ruling specifying the annual payments (ruling
amounts) that, over the taxable years remaining in the funding period as of the date the
schedule first applies, will result in a projected balance of such fund as of the last day of
the funding period equal to (and in no event more than) the amount of decommissioning
costs allocable to such fund.

       Section 1.468A-3(a)(2) provides that each schedule of ruling amounts must be
consistent with the principles and provisions of § 1.468A-3 and must be based on
reasonable assumptions concerning — (i) The after-tax rate of return to be earned by
the assets of the nuclear decommissioning fund; (ii) The total estimated cost of
PLR-105578-23                                 4

decommissioning the nuclear power plant; and (iii) The frequency of contributions to
such fund for a taxable year. Under § 1.468A-3(a)(3), the Service shall provide a
schedule of ruling amounts identical to the schedule proposed by the taxpayer, but no
schedule of ruling amounts shall be provided by the Service unless the taxpayer's
proposed schedule is consistent with the principles and provisions of § 1.468A-3 and is
based on reasonable assumptions.

        Section 1.468A-3(a)(4) provides that the taxpayer bears the burden of
demonstrating that the proposed schedule of ruling amounts is consistent with the
principles and provisions of § 1.468A-3 and is based on reasonable assumptions. If a
public utility commission established or approved the currently applicable rates for the
furnishing or sale by the taxpayer of electricity from the nuclear power plant, the
taxpayer can generally satisfy this burden of proof by demonstrating that the schedule
of ruling amounts is calculated using the assumptions used by the public utility
commission in its most recent order.

       Section 1.468A-3(b)(1) provides that, in general, the ruling amount specified in a
schedule of ruling amounts for any taxable year in the funding period shall not be less
than the ruling amount specified in such schedule for any earlier taxable year.

       Section § 1.468A-3(c)(1) provides that the funding period for a nuclear
decommissioning fund is the period that — (i) Begins on the first day of the first taxable
year for which a deductible payment is made (or deemed made) to such fund; and (ii)
Ends on the last day of the taxable year that includes the last day of the estimated
useful life of the nuclear power plant to which such fund relates.

       Under § 1.468A-3(c)(2)(i)(A), except as provided in § 1.468A-3(c)(2)(ii), the last
day of the estimated useful life of a nuclear power plant that has been included in the
rate base for ratemaking purposes in any ratemaking proceeding that established rates
for a period before January 1, 2006, is the date used in the first such ratemaking
proceeding as the estimated date on which such plant will no longer be included in the
taxpayer's rate base for ratemaking purposes.

       Under § 1.468A-3(c)(2)(i)(B), except as provided in § 1.468A-3(c)(2)(ii), the last
day of the estimated useful life of a nuclear power plant that is not described in §
1.468A-3(c)(2)(i)(A) is the last day of the estimated useful life of such plant determined
as of the date it is placed in service. Under § 1.468A-3(c)(2)(i)(C), except as provided in
§ 1.468A-3(c)(2)(ii), a taxpayer with an interest in a plant that is not described in §
1.468A-3(c)(2)(i)(A) may use any reasonable method for determining the last day of
such estimated useful life.

       Under § 1.468A-3(c)(2)(ii), if it can be established that the estimated useful life of
a nuclear power plant will end on a date other than the date determined under
§ 1.468A-3(c)(2)(i), the taxpayer may use such other date as the last day of the
estimated useful life but is not required to do so. If the last day of the estimated useful
PLR-105578-23                                 5

life was determined under § 1.468A-3(c)(2)(i)(A) and the most recent ratemaking
proceeding used an alternative date as the estimated date on which a nuclear power
plant will no longer be included in the rate base, the most recent ratemaking proceeding
will generally be treated as establishing such alternative date as the last day of the
estimated useful life.

       Section 1.468A-3(d)(1) provides that the amount of decommissioning costs
allocable to a nuclear decommissioning fund is the taxpayer's share of the total
estimated cost of decommissioning the nuclear power plant to which the fund relates.

      Section 1.468A-3(e) provides the rules regarding the manner of requesting a
schedule of ruling amounts.

       Section 1.468A-3(e)(1)(v) provides that the Service will not provide or revise a
ruling amount applicable to a taxable year in response to a request for a schedule of
ruling amounts filed after the deemed payment deadline date (as defined in § 1.468A-
2(c)(1)) for such taxable year. Under § 1.468A-2(c)(1), the deemed payment deadline
date is the fifteenth day of the third calendar month after the close of any taxable year.

      Section 1.468A-3(e)(2) enumerates the information that must be contained in a
request for a schedule of ruling amounts.

       Section 1.468A-3(e)(3) provides that the Service may prescribe administrative
procedures that supplement the provisions of §§ 1.468A-3(e)(1) and (2), and may, in its
discretion, waive the requirements of §§ 1.468A-3(e)(1) and (2) under appropriate
circumstances.

        Section 1.468A-3(f)(1)(i) provides that any taxpayer that has obtained a schedule
of ruling amounts pursuant to § 1.468A-3(e) must file a request for a revised schedule of
ruling amounts on or before the deemed payment deadline date for the tenth taxable
year that begins after the taxable year in which the most recent schedule of ruling
amounts was received. If the taxpayer calculated its most recent schedule of ruling
amounts on any basis other than an order issued by a public utility commission, the
taxpayer must file a request for a revised schedule of ruling amounts on or before the
deemed payment deadline date for the fifth taxable year that begins after the taxable
year in which the most recent schedule of ruling amounts was received.

       Section 1.468A-3(f)(1)(ii)(B) provides that any taxpayer that has determined its
ruling amount for any taxable year under a formula prescribed by § 1.468A-6 must file a
request for a revised schedule of ruling amounts on or before the deemed payment
deadline for its first taxable year that begins after the disposition.

      Section 1.468A-6(e)(2)(ii) provides that a transferee of a qualifying interest in a
nuclear power plant must file a request for a revised schedule of ruling amounts with
PLR-105578-23                                6

respect to that interest on or before the deemed payment deadline for the first taxable
year of the transferee beginning after the disposition.

        Section 1.468A-3(f)(2) provides that any taxpayer that has obtained a schedule
of ruling amounts pursuant to § 1.468A-3(e) can request a revised schedule of ruling
amounts. Such a request must be made in accordance with the rules of § 1.468A-3(e).
The Service will not provide a revised ruling amount applicable to a taxable year in
response to a request for a schedule of ruling amounts that is filed after the deemed
payment deadline date for such taxable year.

        We have examined the representations and information submitted by Taxpayer
in relation to the requirements set forth in § 468A and the regulations thereunder.
Based solely upon the facts as represented by Taxpayer on the date of the request, we
reach the following conclusions:

    1. Taxpayer has a qualifying interest in Plant and is, therefore, an eligible taxpayer
       under § 1.468A-1(b)(1).

    2. Taxpayer, as owner of Percent of Plant, has calculated its share of
       decommissioning costs under § 1.468A-3(d)(1).

    3. The proposed schedule of ruling amounts is based on Order 1 and Order 2
       issued by Commission and assumptions contained in Study 1 and in the updated
       Study 2 that Taxpayer has represented is a standard type used in the industry.

    4. Taxpayer has demonstrated, pursuant to § 1.468A-3(a)(4), that the proposed
       schedule of ruling amounts is based on reasonable assumptions and is
       consistent with the principles of § 468A and the regulations thereunder.

    5. The maximum amount of cash payments made (or deemed made) to the Fund
       during any tax year shall not exceed the ruling amount applicable to the Fund for
       such taxable year as provided in § 1.468A-2(b)(1).

      Based solely on the determinations above, we conclude that Taxpayer's
proposed schedule of ruling amounts satisfies the requirements of § 468A. We have
approved the following revised schedule of ruling amounts.


                   APPROVED SCHEDULE OF RULING AMOUNTS


                    Year                                    Ruling Amount

       Each Year, Year D to Year A                              $Amount
PLR-105578-23                                            7

       Except as specifically determined above, no opinion is expressed or implied
concerning the Federal income tax consequences of the transaction described above.
Specifically, while we have approved the proposed schedule of ruling amounts based
on cost estimates contained in Study 2, we make no ruling, express or implied, whether
any item contained in the Study 2 constitutes a nuclear decommissioning cost within the
meaning of § 1.468A-1(b)(6), or whether the decommissioning study conforms to
industry standards and practices.

        If an event described in § 1.468A-6(a) occurs during a taxable year to which this
schedule of ruling amounts relates, Taxpayer is limited to making payments to the Fund
prior to the date of such event, regardless of the amount approved in this schedule of
ruling amounts.

       This ruling is directed only to the Taxpayer who requested it. Section 6110(k)(3)
provides that it may not be used or cited as precedent. In accordance with the power of
attorney on file with this office, copies of this letter ruling are being sent to your
authorized representatives. A copy of this letter ruling is also being sent to the Director.

       Pursuant to § 1.468A-7(a), a copy of this letter must be attached (with the
required Election Statement), to Taxpayer's federal income tax return for each year in
which Taxpayer claims a deduction for payment to the Fund.

                                                Sincerely,



                                                Maggie Stehn
                                                Senior Counsel, Branch 2
                                                (Energy, Credits, and Excise Tax)

Enclosure (1)


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