IC-DISC marginal costing is generally unavailable when the related purchaser is a CFC, and the sale gives rise to Subpart F foreign base company sales income

A related supplier generally may not use the IC-DISC marginal costing method for sales of export property where the purchaser is related within IRC §954(d)(3) and the purchaser’s resale gives rise to foreign base company sales income under IRC §954(d). Treasury Regulation §1.994-2(a) states that the marginal costing rules do not apply in that circumstance, unless for the purchaser’s resale year the de minimis rule in IRC §954(b)(3)(A) applies or the high-tax exception in IRC §954(b)(4) applies [4]. The ordinary IC-DISC pricing rules under IRC §994 and Treas. Reg. §1.994-1 remain relevant, but the special marginal costing rule is expressly switched off for those Subpart F sales [1] [3] [4].

Table of Contents

1. Statutory and regulatory framework
2. Why Subpart F matters to IC-DISC marginal costing
3. Related-person requirement
4. The two regulatory exceptions
5. What marginal costing otherwise does
6. What remains available when marginal costing is barred
7. Additional nuance from the DISC regulations and case law
8. Suggested practitioner formulation
9. Conclusion

Statutory and regulatory framework

IRC §994(a) provides the core IC-DISC intercompany pricing rules. In the case of a sale of export property to a DISC by a related person described in IRC §482, the DISC’s taxable income is based on a transfer price that does not exceed the greatest of three amounts: (1) 4 percent of qualified export receipts plus 10 percent of export promotion expenses, (2) 50 percent of combined taxable income plus 10 percent of export promotion expenses, or (3) taxable income based on the actual sale price charged, subject to IRC §482 [1].

Treas. Reg. §1.994-1 explains that these are the three principal pricing methods available to a related supplier and a DISC: the 4-percent gross receipts method, the 50-50 combined taxable income method, and the IRC §482 method [3]. The regulation also explains that the marginal costing rules are a separate, special regime authorized by IRC §994(b)(2), and those rules are set out in Treas. Reg. §1.994-2 [3] [4].

Treas. Reg. §1.994-2(a) is the key limiting rule. It provides that marginal costing may be used only when the DISC is treated as seeking to establish or maintain a foreign market for sales of export property, but it then expressly states that the marginal costing rules do not apply to sales of export property which, in the hands of a purchaser related under IRC §954(d)(3) to the seller, give rise to foreign base company sales income under IRC §954(d), unless the purchaser’s resale year satisfies IRC §954(b)(3)(A) or IRC §954(b)(4) [4].

Why Subpart F matters to IC-DISC marginal costing

The IC-DISC marginal costing limitation is tied directly to the Subpart F foreign base company sales income rules. IRC §954(a)(2) includes foreign base company sales income as a category of foreign base company income [2]. IRC §954(d)(1) generally treats income as foreign base company sales income when it is derived in connection with a purchase of personal property from a related person and a sale to any person, or vice versa, where the property is manufactured outside the CFC’s country of organization and sold for use, consumption, or disposition outside that country [2].

Treas. Reg. §1.954-3(a)(1) elaborates that foreign base company sales income includes profits, commissions, fees, or similar income from related-party purchase-and-sale transactions involving personal property, subject to the statutory exceptions [5]. The regulation then sets out the principal exceptions, including where the property is manufactured, produced, constructed, grown, or extracted in the CFC’s country of organization, where the property is sold for use, consumption, or disposition within that country, or where the property is manufactured by the CFC itself [5].

That linkage is important because Treas. Reg. §1.994-2 does not deny marginal costing merely because the purchaser is a CFC. The denial applies when the sale is one that, in the hands of the related purchaser, gives rise to foreign base company sales income. So the IC-DISC analysis requires a substantive Subpart F determination under IRC §954(d) and Treas. Reg. §1.954-3, not merely a check-the-box inquiry about whether the purchaser is foreign or controlled [4] [2] [5].

Related-person requirement

The marginal costing disallowance in Treas. Reg. §1.994-2(a) applies only if the purchaser is related under IRC §954(d)(3) [4]. IRC §954(d)(3) defines a related person, with respect to a controlled foreign corporation, as a person that controls or is controlled by the CFC, or a person controlled by the same person or persons that control the CFC. For corporations, control means ownership, directly or indirectly, of more than 50 percent of vote or value, and constructive ownership rules similar to IRC §958 apply [2].

Accordingly, the IC-DISC marginal costing prohibition is aimed at related-party foreign sales structures, not unrelated foreign distribution arrangements. If the purchaser is not related within IRC §954(d)(3), the specific Treas. Reg. §1.994-2(a) prohibition does not apply by its terms [4] [2].

The two regulatory exceptions

Treas. Reg. §1.994-2(a) preserves two narrow exceptions. Marginal costing remains available if, for the purchaser’s resale year, either IRC §954(b)(3)(A) applies or the income falls within IRC §954(b)(4) [4].

IRC §954(b)(3)(A) is the de minimis rule. It provides that if the sum of foreign base company income and gross insurance income for the taxable year is less than the lesser of 5 percent of gross income or $1,000,000, then no part of the gross income for the year is treated as foreign base company income or insurance income [2]. IRC §954(b)(4) is the high-tax exception. It excludes foreign base company income and insurance income if the taxpayer establishes that the income was subject to an effective foreign tax rate greater than 90 percent of the maximum corporate rate under IRC §11 [2].

These exceptions matter because Treas. Reg. §1.994-2(a) does not ask whether the transaction could theoretically fit within IRC §954(d). It asks whether the sale gives rise to foreign base company sales income in the purchaser’s hands. If the de minimis rule or high-tax exception removes that income from foreign base company income for the purchaser’s resale year, the regulation allows marginal costing notwithstanding the related-party foreign resale structure [4] [2].

What marginal costing otherwise does

Outside the Subpart F limitation, Treas. Reg. §1.994-2 allows a DISC using the 50-50 combined taxable income method to compute combined taxable income using marginal or variable costs rather than full costing, if the DISC is treated as seeking to establish or maintain a foreign market [4]. Under Treas. Reg. §1.994-2(b), the costs taken into account are direct production costs and export promotion expenses, but export promotion expenses are included only to the extent claimed [4]. The resulting combined taxable income is capped by the overall profit percentage limitation, which compares full-costing profitability on all sales of the product or product line [4].

That favorable cost-allocation rule can materially increase DISC income. The regulation’s Subpart F limitation prevents taxpayers from combining that favorable IC-DISC pricing rule with related-party foreign resale structures that generate foreign base company sales income, except where the purchaser’s income is removed from Subpart F by the de minimis or high-tax exceptions [4].

What remains available when marginal costing is barred

If marginal costing is unavailable, the taxpayer may still use the ordinary IC-DISC pricing methods under IRC §994 and Treas. Reg. §1.994-1. Those include:

• the 4-percent gross receipts method [1] [3];
• the 50-50 combined taxable income method using full costing rather than marginal costing [1] [3];
• the IRC §482 method [1] [3].

Treas. Reg. §1.994-1(c)(6) defines combined taxable income under the full-costing method as the DISC’s gross receipts from the sale minus the total costs of the DISC and related supplier that relate to those gross receipts, with costs allocated under rules consistent with Treas. Reg. §1.861-8 [3]. The regulation also contains the “no loss” rule, under which the gross receipts method or combined taxable income method cannot be applied to cause a loss to the related supplier, except that the DISC may generally recover its own costs [3].

Additional nuance from the DISC regulations and case law

The DISC regulations emphasize that the IC-DISC pricing rules are elective only within the bounds of the statute and regulations. Treas. Reg. §1.994-1(a)(1) states that the related supplier may choose among the three pricing methods, but that choice is subject to the detailed computational rules and limitations in the regulations, including the separate marginal costing rules in Treas. Reg. §1.994-2 [3].

The Tax Court’s decision in Longview Fibre confirms the importance of following the specific computational rules in Treas. Reg. §1.994-1 when determining DISC income. In that case, the court upheld the regulation requiring fair market value under IRC §631(a), rather than depletion basis, to be used in computing cost of goods sold for DISC commission purposes, rejecting an attempt to obtain an additional benefit outside the regulatory framework [6]. Although Longview Fibre did not involve Subpart F, it supports the broader point that DISC pricing benefits are available only as specifically authorized by IRC §994 and the regulations, not by analogy or by importing more favorable assumptions from elsewhere [6].

Suggested practitioner formulation

A practitioner-facing formulation could read as follows:

“For IC-DISC purposes, the marginal costing method under Treas. Reg. §1.994-2 is generally unavailable where export property is sold to a purchaser related to the seller within the meaning of IRC §954(d)(3) and the purchaser’s resale gives rise to foreign base company sales income under IRC §954(d). Treas. Reg. §1.994-2(a) expressly disallows marginal costing in that circumstance, unless for the purchaser’s resale year the de minimis rule in IRC §954(b)(3)(A) applies or the high-tax exception in IRC §954(b)(4) applies. If marginal costing is barred, the taxpayer must instead rely on the ordinary IC-DISC pricing methods under IRC §994 and Treas. Reg. §1.994-1.” [4] [1] [3] [2]

Conclusion

The additional authorities reinforce the same conclusion. The relevant IC-DISC rule is not a general anti-CFC rule and not a transfer-pricing doctrine. It is a specific limitation in Treas. Reg. §1.994-2(a) that turns off marginal costing when a related purchaser’s resale gives rise to foreign base company sales income under IRC §954(d), unless the purchaser’s resale year qualifies for the de minimis rule in IRC §954(b)(3)(A) or the high-tax exception in IRC §954(b)(4) [4] [2]. In those cases, the taxpayer remains within the ordinary IC-DISC pricing regime of IRC §994 and Treas. Reg. §1.994-1, but cannot use the special marginal costing rule.

Cited Sources

1. Sec. 994 Inter-company pricing rules
2. Sec. 954 Foreign base company income
3. Sec. 1.994-1  Inter-company pricing rules for DISCs.
4. Sec. 1.994-2  Marginal costing rules.
5. Sec. 1.954-3  Foreign base company sales income.
6. Longview Fibre Co. v. Comm., 71 T.C. 357 (1978)