Form 8993 is the form on which a domestic C corporation works out its §250 deduction — the deduction that lowers the US tax on two very different kinds of cross-border income at once: the GILTI (for tax years beginning after 2025, renamed net CFC tested income) it must include from its controlled foreign corporations (CFCs), and its foreign-derived income from selling, licensing, or providing services to foreign customers. Both halves are figured on one form and deducted on one line of the Form 1120. The computation behind each is involved — deduction eligible income, the foreign-derived portion of it, a taxable-income limitation, and a §78 gross-up all feed the number. This guide is not about that arithmetic. It is about the question that comes first: is the §250 deduction even on the table — is there a C corporation in the structure that has one of these two kinds of income?
Here Form 8993 differs from almost every other form in this library, in two ways worth stating up front. First, it is a benefit, not an obligation: a corporation files Form 8993 to claim a deduction it wants, not to satisfy a reporting mandate it is compelled to meet. Second — and following directly from the first — there is no penalty for not filing it. Form 8993 is not a §6038 information return; skip it and the only consequence is that you forgo the deduction. That makes "who must file Form 8993" a mild misnomer — nobody is forced to. The real question is who may claim the §250 deduction, and PILOT's job is to flag when that opportunity is potentially present, not to value it.
In plain terms Form 8993 is where a C corporation claims the §250 deduction — a tax break, not a trap. There is no fine for skipping it; you simply lose the deduction. PILOT flags Form 8993 as potentially available the moment it sees a C corporation that owns a controlled foreign corporation — the same finding behind Form 5471 and Form 8992 — and it leaves the deduction math to the Professional. The flag is the determination; the number is not.
What the §250 deduction is, and what Form 8993 does
Section 250 gives a domestic C corporation a deduction built from two pieces, and a single form computes both. The statute states the deduction in one sentence:
there shall be allowed as a deduction an amount equal to the sum of— (A) 33.34 percent of the foreign-derived deduction eligible income of such domestic corporation for such taxable year, plus (B) 40 percent of— (i) the net CFC tested income amount (if any) which is included in the gross income of such domestic corporation under section 951A for such taxable year, and (ii) the amount treated as a dividend received by such corporation under section 78 which is attributable to the amount described in clause (i).
— IRC §250(a)(1)
Two halves, two purposes. The (B) half is the inside-out, anti-deferral side: when a corporation has a net CFC tested income inclusion under §951A — the GILTI it must pick up currently from its CFCs, computed on Form 8992 — §250 lets it deduct 40% of that inclusion (plus 40% of the §78 gross-up that rides along with the deemed-paid foreign tax credit). The (A) half is the outside-in, export-incentive side: when a corporation earns foreign-derived deduction eligible income (FDDEI) — broadly, income from selling property to foreign customers for use abroad, or providing services to foreign persons — §250 lets it deduct 33.34% of that income. The same Form 8993 carries both, and the result is a single §250 deduction claimed on the Form 1120.
The deduction is capped by income. A corporation cannot use §250 to create or deepen a loss, so the statute reduces the two amounts when together they would exceed taxable income:
If, for any taxable year— (i) the sum of the foreign-derived deduction eligible income and the net CFC tested income amount otherwise taken into account by the domestic corporation under paragraph (1), exceeds (ii) the taxable income of the domestic corporation (determined without regard to this section), then the amount of the foreign-derived deduction eligible income and the net CFC tested income amount so taken into account shall be reduced ....
— IRC §250(a)(2)
That taxable-income limitation is one reason the deduction's value cannot be read off the ownership chart: it depends on the corporation's overall taxable income for the year, a figure that lives in the return, not in the structure.
In plain terms Form 8993 does two jobs on one page: it figures the deduction against the GILTI a C corporation picks up from its foreign subsidiaries, and the deduction for income it earns selling or licensing to foreign customers. A taxable-income limit can shrink both in a lean year. All of that is arithmetic that turns on the year's numbers — which is exactly why PILOT flags the form but does not fill it in.
Who files it — a C corporation with GILTI or foreign-derived income
The §250 deduction is a domestic C corporation deduction, and the form's instructions draw the filer line cleanly:
All domestic corporations (and U.S. individual shareholders of controlled foreign corporations (CFCs) making a section 962 election (962 electing individual)) must use Form 8993 to determine the allowable deduction under section 250. The deduction is allowed only to domestic corporations (not including real estate investment trusts (REITs), regulated investment companies (RICs), and S corporations) and section 962 electing individuals.
— Instructions for Form 8993 (Rev. December 2025), Who Must File
So the form is, with one narrow exception, a Form 1120 attachment: only a domestic C corporation claims §250, and REITs, RICs, and S corporations are expressly carved out (the regulation says the same — Reg. §1.250(a)-1(c)(1)). This is the opposite end of the filer spectrum from Form 8992, which both individuals (Form 1040) and C corporations (Form 1120) file; the GILTI inclusion reaches an individual, but the §250 deduction against it generally does not. The one bridge is the §962 election, discussed below.
The two halves of the deduction surface differently, and PILOT treats them differently because one is a status it can read from ownership and the other is a business fact it may not hold.
The GILTI / net CFC tested income side — flagged from the same CFC
The (B) half rides on a §951A inclusion, and a §951A inclusion rides on a 10%-or-greater US shareholder of a CFC — the very status that drives Form 5471 and Form 8992. When the US shareholder is a C corporation, the §250 deduction against that inclusion becomes potentially available at the same moment, from the same facts. PILOT determines the CFC and the US-shareholder status once, from the ownership chart; if the shareholder is a C corporation, Form 8993 joins Form 8992 on the list of potentially required forms. No new fact is needed — the deduction follows the inclusion.
Example — the GILTI side. Domestic C corporation USP A owns 100% of foreign corporation FC B, a CFC with tested income. A has a net CFC tested income (GILTI) inclusion, computed on Form 8992. Because A is a C corporation, it may deduct 40% of that inclusion (and 40% of the §78 gross-up) on Form 8993. PILOT flags Form 8993 from the same CFC ownership that produced the Form 5471 and Form 8992 flags; the Professional computes the inclusion, the deduction, and the credit. The trigger is a status PILOT determines; the amount is a computation it does not.
The foreign-derived (FDDEI) side — a business fact, flagged with care
The (A) half does not ride on ownership at all. FDDEI is defined by what the corporation sells and to whom:
The term "foreign-derived deduction eligible income" means, with respect to any taxpayer for any taxable year, any deduction eligible income of such taxpayer which is derived in connection with— (A) property— (i) which is sold by the taxpayer to any person who is not a United States person, and (ii) which the taxpayer establishes to the satisfaction of the Secretary is for a foreign use, or (B) services provided by the taxpayer which the taxpayer establishes to the satisfaction of the Secretary are provided to any person, or with respect to property, not located within the United States.
— IRC §250(b)(1)
Whether a corporation has FDDEI is a fact about its customers and operations — does it export, license intangibles abroad, or serve foreign clients? — not a fact about who owns whom. PILOT's structural fact sheet, which is built to map entities and ownership, may simply not capture it. So PILOT surfaces the foreign-derived side cautiously: where the intake facts suggest cross-border sales or services, it raises Form 8993 as a Professional-review item, and it flags the FDDEI computation itself as outside its scope. It does not assert the deduction from the org chart, because the org chart does not show it.
Example — the foreign-derived side. Domestic C corporation Corporation A manufactures in the United States and sells finished goods to unrelated foreign customers for use abroad, and licenses a patent to a foreign manufacturer. A may have FDDEI, and a 33.34% §250 deduction with it. But nothing in A's ownership structure reveals that — it turns on A's sales and where its customers use the goods. PILOT flags the possibility for the Professional rather than determining it; confirming FDDEI, and computing it, is the Professional's work.
In plain terms there are two doors to the §250 deduction. One opens automatically when PILOT sees a C corporation that owns a foreign subsidiary — the GILTI side, the same finding behind Form 5471 and Form 8992. The other depends on what the company sells to foreign customers — a business fact that may not be in the ownership picture at all, so PILOT raises it as something for the Professional to check rather than a settled conclusion.
The §962 election — an individual's only way in
An individual who is a US shareholder of a CFC has a GILTI inclusion but, ordinarily, no §250 deduction — the deduction is corporate. The exception is the §962 election, which lets an individual be taxed on the inclusion at corporate rates and, in doing so, reach the 40% §250 deduction and the §960(d) credit that are otherwise corporate-only. An individual who makes the election and claims the deduction files Form 8993 too — the Who Must File text above says a "962 electing individual" must use the form — attaching it to the same Form 1040 on which the §962 election is made. But that election is a planning decision that turns on computed effective rates, Form 8993 is otherwise 1120-only, and §962 is out of PILOT's scope — surfaced, if at all, only as a recommendation for the Professional to evaluate, never modeled.
What OBBBA changed for the §250 deduction (tax years beginning after 2025)
The year matters here as much as it does for GILTI itself. The 2025 reconciliation act — the One Big Beautiful Bill Act (OBBBA, Pub. L. 119-21) — reshaped §250 for tax years beginning after December 31, 2025. Tax-year-2025 returns still use the prior rules; 2026 and later returns use a meaningfully different set, and the same corporation can get a different deduction before and after. Four changes stand out:
- The export side is renamed, and the "intangible" computation is gone. Under prior law the (A)-half deduction ran on foreign-derived intangible income (FDII) — not the corporation's foreign-derived income itself, but a slice of it: deemed intangible income (deduction eligible income reduced by a deemed tangible income return equal to 10% of qualified business asset investment, or QBAI), apportioned to foreign sales and services. OBBBA replaced that whole construct with foreign-derived deduction eligible income (FDDEI) — the foreign-derived income directly, with no QBAI reduction and no "intangible" step. The rename from "intangible" to "deduction eligible" is the removal of the QBAI carve-out on the export side.
- The same QBAI carve-out is repealed on the GILTI side. OBBBA (via the §951A changes) also struck the net deemed tangible income return — the 10%-of-QBAI reduction that used to shrink the GILTI inclusion before the deduction was applied. For 2026 and later, the inclusion in the (B) half is the full net CFC tested income, with no routine-return carve-out. (The companion mechanics are in the Form 8992 guide.)
- The deduction percentages reset. The (B)-half deduction dropped from 50% to 40%, and the (A)-half from 37.5% to 33.34%. OBBBA also struck the scheduled phase-down that prior law had set for years after 2025 (which would have cut the percentages to 37.5% and 21.875%) — the regulation still shows that superseded phase-down, but the statute now controls. At a 21% corporate rate, the 40% deduction produces a 12.6% effective rate on the net CFC tested income amount before credits (up from 10.5%); the 33.34% deduction leaves roughly 14% on FDDEI.
- Effective for tax years beginning after December 31, 2025. A 2025 return and a 2026 return for the same company can therefore produce different §250 deductions, computed on differently named inputs.
Example — the same corporation, before and after. Domestic C corporation Corporation A has steady foreign-derived income and a substantial investment in US plant and equipment (QBAI), and it owns a CFC with tested income. For TY2025, A's export-side deduction is 37.5% of foreign-derived intangible income — its foreign-derived income reduced by a 10%-of-QBAI return — and its GILTI-side deduction is 50% of the inclusion (itself net of a QBAI carve-out). For TY2026, the export-side deduction is 33.34% of FDDEI with no QBAI reduction, and the GILTI-side deduction is 40% of the full net CFC tested income. Each rate is lower, but each base is wider; whether A's total deduction rises or falls depends on its QBAI and income mix — a computation for the Professional. What does not change is the threshold question PILOT answers: A is a C corporation with a CFC, so the §250 deduction is potentially available in both years.
In plain terms for 2026 onward, the §250 deduction has a renamed export half ("foreign-derived deduction eligible income" instead of "foreign-derived intangible income"), no more carve-out for a normal return on equipment on either half, and lower headline rates (40% and 33.34%, down from 50% and 37.5%). A deduction you sized up for 2025 can come out differently for 2026. What does not change is who can claim it — a C corporation with GILTI or foreign-derived income — and PILOT flags that the same way in either year.
Where Form 8993 sits — the forms it travels with
Form 8993 is a deduction form, and it sits downstream of the forms that establish the income it offsets:
- Form 8992 — the GILTI inclusion. The (B) half of the §250 deduction is figured against the net CFC tested income computed on Form 8992 (itself a Potential-tier form in PILOT). No inclusion, no (B)-half deduction — which is why the two travel together for a C corporation that owns a CFC.
- Form 5471 — the CFC information return. Any C corporation with a GILTI inclusion is, by definition, a US shareholder of a CFC, so a Form 5471 obligation is almost always present too. That one PILOT determines (it is a Required-tier filing); Form 8993 is the deduction that builds on the same facts.
- Form 1118 — the foreign tax credit. The §960(d) deemed-paid credit on the inclusion is claimed by corporations on Form 1118; the §78 gross-up that the credit brings with it is itself part of the §250(a)(1)(B) deduction base. The credit computation is out of PILOT's scope.
- The §962 election — the individual's bridge. A US individual may elect under §962 to be taxed on a GILTI inclusion at corporate rates and thereby reach the §250 deduction and the §960(d) credit. It is an elective planning decision that turns on computed effective rates, and it is out of PILOT's scope, surfaced only as an item for the Professional to evaluate.
How it is filed, and why there is no penalty
Form 8993 is attached to the corporation's income tax return — the Form 1120 — and filed by that return's due date, including extensions; for a §962-electing individual, it attaches to the Form 1040. The regulation ties the filing to the act of claiming the deduction:
Each domestic corporation (or individual making an election under section 962) that claims a deduction under section 250 for a taxable year must make an annual return on Form 8993 ... [filed] with the domestic corporation's (or in the case of a section 962 election, the individual's) income tax return on or before the due date (taking into account extensions) ....
— Treas. Reg. §1.250(a)-1(d)
Read it closely: the corporation that claims the deduction must file the form. There is no separate mandate to file Form 8993 by itself, and — unlike Form 8992 — there is no §6038 information-return penalty behind it. The Form 8993 instructions say nothing about a failure-to-file penalty, because there is none of the flat, per-form kind. The consequence of not filing is simply that the corporation does not get the §250 deduction (and, as with any return position, ordinary accuracy-related exposure under §6662 applies if a claimed deduction is wrong).
This is the clean inverse of its Potential-tier sibling. Form 8992 is a §6038 information return with real teeth — a missed one draws the §6038(b) $10,000-per-CFC penalty and a foreign-tax-credit reduction, the same regime as Form 5471. Form 8993 carries none of that. The Form 8992 guide makes the point from the other direction: among the computational forms, Form 8993 (the deduction), Form 8990 (the interest limitation), and Form 8991 (BEAT) carry no separate information-return penalty of their own. Treat a missed Form 8993 as a forgone benefit, not a compliance failure.
In plain terms there is no fine for not filing Form 8993 — it is not an information return like Form 5471 or Form 8992. If a C corporation that could claim the §250 deduction does not file the form, it just does not get the deduction. That is the whole "penalty": a bigger tax bill than it needed to have.
What PILOT does and does not do here
This is the boundary the whole guide turns on, stated plainly. PILOT flags whether the §250 deduction (Form 8993) is potentially available — and on the GILTI side it can, because the trigger is a status it determines: a C corporation that is a 10%-or-greater US shareholder of a CFC, the same finding behind Form 5471 and Form 8992. On the foreign-derived side, PILOT surfaces the form as a Professional-review item where the intake facts hint at cross-border sales or services, because whether FDDEI exists is a business fact its structural fact sheet may not hold. PILOT does not compute the §250 deduction, the FDDEI figure, the deduction eligible income, the foreign-derived portion, the taxable-income limitation, or the resulting tax. It does not decide whether a §962 election is worthwhile. Those are computations and elections that belong to the Professional and to the engagement's workpapers. PILOT names the form, identifies the C corporation, and explains why the deduction is potentially in play — and stops there, by design.
In plain terms PILOT's answer is "a C corporation with a CFC is here, so the §250 deduction (Form 8993) is potentially available — confirm it and compute it," and, where the facts hint at foreign sales, "check whether the foreign-derived deduction applies too." It will never tell you how large the deduction is. That is not a gap to apologize for; it is the line between determining what may be filed and computing what it is worth, and PILOT stays on the determination side of it.
Relationships to other regimes and forms
The §250 deduction sits at the center of the post-2017 international system, and a few neighbors define how it interacts:
- §951A (GILTI / net CFC tested income). The (B) half of the deduction exists only because §951A makes a C corporation include its CFCs' tested income currently. The deduction is the relief valve on that inclusion — roughly 40% of it — and the two are computed in tandem on Form 8992 and Form 8993. Both ride on the same CFC and US-shareholder determination, including the OBBBA restoration of §958(b)(4) for tax years beginning after 2025, which can switch CFC status (and thus the whole question) off for some foreign-controlled structures.
- §960(d) and the §78 gross-up. A C corporation with a GILTI inclusion is deemed to have paid 90% of the related foreign taxes (post-OBBBA) and grosses its income up by that amount under §78; the §250(a)(1)(B) deduction is figured on the inclusion and that gross-up. The credit and gross-up mechanics are out of PILOT's scope.
- FDII / FDDEI and the export computation. The foreign-derived half rests on deduction eligible income, the foreign-derived ratio, foreign-use rules, and (pre-2026) QBAI — a computation governed by Reg. §§1.250(b)-1 through 1.250(b)-6 and squarely in workpaper territory. PILOT flags the possibility of FDDEI, never the figure.
- §962 and the individual. For an individual US shareholder of a CFC, the §962 election is the only route to the §250 deduction. It is elective, rate-sensitive, and out of PILOT's scope — a Professional-review item, not a determination.
What Form 8993 is not
Form 8993 is not an information return, and it is not a trap. It is the worksheet on which a C corporation claims a benefit — a deduction it is entitled to but not required to take. Nobody is penalized for leaving it off; the cost of doing so is a larger tax bill, not a fine. It is also not a PILOT computation: the §250 deduction is a number that depends on the year's income, the corporation's QBAI and customer base, and choices about credits and elections — none of which PILOT touches. The first question — the one this guide answers, and the one PILOT flags — is simply whether the §250 deduction is potentially available: whether there is a C corporation in the structure with a GILTI inclusion or foreign-derived income, for which year, and on which side.