When does a state tax an intercompany gain that the federal consolidated return defers?

What the federal deferral does

An intercompany transaction is "a transaction between corporations that are members of the same consolidated group immediately after the transaction" (Treas. Reg. section 1.1502-13(b)(1)(i)). The regulation calls the selling member S and the buying member B, and S's "intercompany items" are its income, gain, deduction and loss from that transaction (section 1.1502-13(b)(2)(i)). The definition is not limited to sales: the regulation lists S's distribution to B with respect to S stock as an intercompany transaction (section 1.1502-13(b)(1)(i)(D)).

Two rules set the timing. Under the matching rule, S and B are generally treated as divisions of a single corporation, so S's gain is taken into account when, and to the extent that, a single corporation would have recognized it (section 1.1502-13(a)(6)(i) and (c)). The acceleration rule supplies the timing when that single-entity result can no longer be achieved: S's items are taken into account "immediately before it first becomes impossible to achieve this effect," with S or B becoming a nonmember as the paradigm case (section 1.1502-13(a)(6)(i), (d)(1)(i)). The practical result is a deferred gain sitting on the seller's books, with no state of its own, waiting for a resale outside the group or a departure from it.

The same architecture covers two transactions that the Internal Revenue Code would otherwise tax at once. A corporation that distributes appreciated property recognizes gain "as if such property were sold to the distributee at its fair market value" (IRC section 311(b)(1)); when the distributee is another member of the group, the distribution is an intercompany transaction and the gain is an intercompany item. And where liabilities assumed in a section 351 exchange exceed the basis of the property transferred, "such excess shall be considered as a gain" (IRC section 357(c)(1)). The consolidated return regulations do not defer that gain; they switch the rule off. "Section 357(c) does not apply to any transaction to which" section 1.1502-13 applies, if it occurs in a consolidated return year beginning on or after January 1, 1995, unless the transferor or transferee becomes a nonmember as part of the same plan (Treas. Reg. section 1.1502-80(d)(1)). The transferor's basis in the transferee's stock instead goes below zero, and that negative amount, the excess loss account, is "treated for all Federal income tax purposes as basis that is a negative amount" and taken into account as income or gain when the stock is disposed of, when either corporation becomes a nonmember, or on worthlessness (Treas. Reg. section 1.1502-19(a)(2), (b)(1), (c)(1)).

None of this binds a state. Each state reaches the federal result, or departs from it, through its own statute: the starting point it uses, the group it recognizes, and whether it has adopted the intercompany rules by reference or by its own regulation.

Three filing methods, three timetables

Separate-entity states. Where each corporation files on its own, the buyer is not a member of anything the state recognizes, and there is no single entity whose results a deferral rule could preserve. Tennessee is the clearest statement of the model. Its Department of Revenue describes Tennessee as "a separate single entity reporting state," states that "[c]onsolidated returns are not allowed for franchise and excise tax purposes," and requires a taxpayer whose income is reported on a federal consolidated return to provide "a pro-forma federal return reflecting only the activities of each separate single-entity franchise and excise taxpayer" (Tennessee Department of Revenue, Franchise and Excise Tax Manual (June 2026), chapter 4). The manual adds that "intercompany transactions between affiliated entities will not be eliminated." It does not address section 1.1502-13 by name, but a pro forma return confined to the seller's own activities, with intercompany transactions left in, reports the seller's gain in the year of the sale.

State consolidated returns built on the federal group. Some states allow, or require, a consolidated return whose base is the federal consolidated computation. Arizona permits the common parent of an affiliated group to elect to "consolidate the taxable income of all members of the affiliated group," and provides that "[t]he Arizona gross income of an Arizona affiliated group is the consolidated federal taxable income of the affiliated group" (Ariz. Rev. Stat. section 43-947(A), (E)). The affiliated group is defined by reference to the corporations that file consolidated federal returns under IRC section 1501 (section 43-947(I)(1)). Because the starting figure is federal consolidated taxable income, the federal deferral and the federal acceleration events carry through, and the Arizona timing matches the federal timing.

Combined reporting states. A combined report adds together the income of the corporations in a unitary business, and the group it recognizes is defined by state law: usually more-than-50-percent common ownership plus a unitary relationship, rather than the federal 80 percent affiliation test. Several combined reporting states have adopted deferral for transactions inside that group.

• New York provides that, in computing combined business income, "all intercorporate dividends shall be eliminated" and "all other intercorporate transactions shall be deferred in a manner similar to the United States Treasury regulations relating to intercompany transactions under section fifteen hundred two of the internal revenue code" (N.Y. Tax Law section 210-C(4)(b)(i)). Intercorporate receipts, income and gains are eliminated from the apportionment factor (section 210-C(5)(a)). The statute does not list the restoration events; it points to the federal rules by analogy.
• Massachusetts defers "[i]ncome from an intercompany transaction between members of the same combined group" that relates to the group's unitary business "in a manner similar to that provided in U.S. Treas. Reg. § 1.1502-13," and otherwise applies the principles of that regulation, "including as to deferrals and eliminations," to the extent consistent with state combined group membership and reporting principles (830 CMR 63.32B.2(6)(c)5, (6)(c)9).
• California's regulation on intercompany transactions in a combined report, Cal. Code Regs., tit. 18, section 25106.5-1, adopts the federal consolidated return treatment of intercompany transactions for transactions occurring on or after January 1, 2001, and defers the income until the asset leaves the group, the buyer and seller cease to be members of the same combined reporting group, or the buyer converts the asset to a nonbusiness use (FTB Publication 1061, Guidelines for Corporations Filing a Combined Report (2025), "Adjustments for Intercompany Transactions").
• Illinois computes combined base income "by treating all members of the unitary business group (including ineligible members) as if they constituted a federal consolidated group and by applying the federal regulations for determining consolidated taxable income," with listed exceptions, and eliminates items between members where necessary to avoid distorting the apportionment factors (86 Ill. Adm. Code 100.5270(a)(1), (b)(1)). The rule does not name section 1.1502-13 or describe a restoration event, so it points toward deferral measured by the Illinois unitary group without stating the mechanics.

The common thread is that each of these rules runs on the state group. The federal regulation defers because S and B are in the same consolidated group; New York, Massachusetts and California defer because they are in the same combined group. Where the two groups coincide, the clocks usually run together. Where they do not, they separate.

When the state group and the federal group differ

Three mismatches recur.

The buyer is in the federal group but not the state combined group. A wholly owned subsidiary in an unrelated line of business is a member of the federal consolidated group but may not be unitary with the seller. The federal return defers the seller's gain. The state deferral rules, written for transactions between members of the same combined group, do not reach the sale, because the buyer is a nonmember for state purposes, unless a New York commonly owned group election or a Massachusetts affiliated group election brings it into the combined group (N.Y. Tax Law section 210-C(3); 830 CMR 63.32B.2(6)(c)5). The seller's gain is state income in the year of the sale, and the federal deferral has to be reversed in the state computation to reach that result.

The buyer is in the state combined group but not the federal group. Combined reporting reaches commonly controlled corporations that cannot consolidate federally: sister corporations owned by the same individuals, or a subsidiary owned more than 50 percent but less than 80 percent. A sale between them is currently taxable on the federal return, but it is an intercompany transaction for the state combined report, and the state rule defers it. California addresses the mismatch with an election: a taxpayer may report the income in the year of the transaction if it made a similar election under the federal consolidated return rules or, where those rules do not apply, if the sale was reported as current taxable income for federal or foreign tax purposes (FTB Publication 1061 (2025)). Absent the election, the federally recognized gain is backed out of the state computation and held until a California trigger occurs.

The members leave the state group while staying in the federal group. A combined group can change without any change in ownership. California restores deferred income when "the buyer and the seller no longer constitute members of the same combined reporting group, including by means of a water's-edge election" (FTB Publication 1061 (2025)), so the end of a unitary relationship between two members of the federal group accelerates California gain that remains deferred federally because no consolidated group member has left. A water's-edge election also restores gain, but on sales to excluded foreign affiliates, which the federal return taxed when made because a foreign corporation cannot join a consolidated group (IRC section 1504(b)(3)). Massachusetts restores deferred income when "the buyer and seller are no longer members of the same combined group," and, for a group based on a unitary business, when the buyer resells the property to another member for use outside the unitary business or converts it to such a use (830 CMR 63.32B.2(6)(c)5). A group that has stopped running two businesses together may therefore owe state tax on an old intercompany gain in a year with no federal event at all.

Restoration: which year, and whose factors

Once a deferred gain is restored, it still has to be apportioned, and the states do not agree on how.

California apportions restored income "using the apportionment percentages of the members of the group for the taxable year in which the income is restored" (FTB Publication 1061 (2025)). A gain on a sale made when the group's California factors were high is apportioned at the lower percentage of a later year, or the reverse. Massachusetts also ties apportionment to the restoration event, not the original sale: restored income "shall be apportioned as income earned immediately before the event," as unitary business income or as affiliated group income depending on the election in effect at the time of the intercompany transaction (830 CMR 63.32B.2(6)(c)5). New York's statute does not specify, which leaves the point to the "manner similar to" language of section 210-C(4)(b)(i).

California's guidance also adjusts the factors around the deferral: the purchaser carries the seller's original cost in the property factor while the gain is deferred, and on a later sale to a nonmember the gross receipt appears in the sales factor of the intercompany purchaser (FTB Publication 1061 (2025)).

A separate-entity state raises the opposite problem. The seller reported the gain in the year of the sale. When the federal acceleration event arrives years later, the gain can reappear in whatever federal figure the state begins with, unless the state return carries the earlier recognition forward as a basis difference. The rules above do not prevent the double count on their own; the reconciliation between the federal deferred intercompany schedule and the state returns does.

Distributions, liabilities in excess of basis, and stock basis

Distributions of appreciated property. In a separate-entity state, a subsidiary that distributes appreciated property to its parent recognizes section 311(b) gain in the year of the distribution, whatever the federal consolidated return does with it. Combined reporting states that adopt deferral generally treat the distribution as one more intercompany transaction. California goes further for distributions that exceed the payor's earnings and profits and the holder's basis in the payor's stock: that income, described by IRC section 301(c)(3), "is deferred," is restored to the extent the holder disposes of the stock, even if the distributing corporation stays in the group, and, if the distributor liquidates into the distributee, is generally taken into account ratably over 60 months unless the taxpayer elects to take it into account in full in the year of liquidation (FTB Publication 1061 (2025)).

Liabilities in excess of basis. The federal answer under section 1.1502-80(d)(1) is not deferral but non-application of section 357(c), with the excess loss account under section 1.1502-19 holding the economic gain in negative stock basis. A state that requires each member to compute income as if it filed a separate federal return has no obvious place for either rule, and on that reading section 357(c) applies on its own terms and the gain is current. A combined reporting state that adopts the intercompany transaction rules "in a manner similar to" section 1.1502-13 may or may not also adopt the section 357(c) switch in section 1.1502-80. The New York and Massachusetts texts do not say whether that switch carries over. California's regulation adopts the section 1.1502-80 rules for sections 304, 163(e)(5) and 1031 but not the section 357(c) rule, and applies other law it does not exclude (Cal. Code Regs., tit. 18, section 25106.5-1(a)(4)), which points toward section 357(c) applying for California purposes. Elsewhere the question is open, and one that matters most in contributions of encumbered real estate or of businesses carrying more debt than tax basis.

Stock basis. The federal investment adjustment system raises and lowers a member's basis in subsidiary stock as the subsidiary earns income and makes distributions. States that do not follow it carry a different basis, and the gain on a later sale of the subsidiary's stock differs accordingly. California states the point directly: "the cost basis of a unitary subsidiary's stock is not adjusted to reflect the E&P of that subsidiary" (FTB Publication 1061 (2025), "Consolidated Return Distinguished From a Combined Report"). When the sale of a member's stock restores a deferred intercompany gain, the parent's gain on that stock is therefore computed against a state basis that may bear little relation to the federal figure.

An example across filing methods

A parent owns all the stock of two subsidiaries, a manufacturer and a distributor, which file a federal consolidated return with the parent. In year 1 the manufacturer sells a parcel of land with an adjusted basis of $3 million to the distributor for its $9 million value. In year 4 the parent sells all of the distributor's stock to an unrelated buyer, and the distributor still owns the land.

Federally, the manufacturer's $6 million gain is deferred in year 1 and taken into account immediately before the distributor becomes a nonmember in year 4 (Treas. Reg. section 1.1502-13(d)(1)(i)). In a separate-entity state where the manufacturer files, the pro forma return for year 1 reports the $6 million, and the year 4 state computation keeps the federal acceleration out of the base, because the gain has already been taxed. In Arizona, if the group files a consolidated return, year 4 governs, as it does federally. In New York, Massachusetts and California, if both subsidiaries are in the combined group, the gain is deferred and restored in year 4, when the distributor leaves the combined group; California apportions it with the group's year 4 percentages, and Massachusetts apportions it as income earned immediately before the departure.

With one fact changed, the result moves. If the distributor runs a business that is not unitary with the manufacturer's, the two are in the same federal group but not the same combined group. In New York, Massachusetts and California, absent a New York commonly owned group election or a Massachusetts affiliated group election, the year 1 sale is a sale to a nonmember, and the gain is state income in year 1 even though it stays deferred federally until year 4. If instead the distributor is unitary but owned 60 percent by the parent, the mismatch runs the other way. The federal return taxes the gain in year 1, and the combined reporting states defer it, subject in California to the election to report it currently.

Practice notes

The federal deferred intercompany schedule is the starting inventory, but it is not the state inventory. A sound workpaper lists each deferred item by seller, buyer and property, and for each filing state records whether the state recognized the gain at the transfer, defers it within the federal group, or defers it within its own combined group, together with the state basis that results. That schedule is reviewed each year against changes in the state group: a member that stops being unitary, a water's-edge election, a less-than-80-percent affiliate that joins a combined report, or a conversion of transferred property to a use outside the unitary business can restore a state gain in a year with no federal event. Restoration years call for a check that the gain is apportioned under the right state's rule, California's restoration-year factors or Massachusetts's factors as of immediately before the event, and that a gain already taxed by a separate-entity state is not taxed again when the federal acceleration flows through. Before a group transfers encumbered property between members or distributes appreciated property inside the group, the state analysis is done transaction by transaction, because a separate-entity state can tax section 311(b) or section 357(c) gain in the year of the transfer while the federal return reports nothing. G&G State Tax Group provides multistate analysis of intercompany transactions, deferred gain tracking and transaction-year planning alongside its state and local tax practice.