Reverse Acquisition Tax: Section 382, NOL Limits, and Filings

In a reverse acquisition, the IRS looks past the legal paperwork and treats whichever company’s shareholders end up owning the majority of the combined entity as the true acquirer, and the tax rules for reverse acquisitions flow from that single determination. It drives which company’s tax history survives, whether pre-existing net operating losses can still be used and how much, whether the acquired assets get a stepped-up basis, and which forms and statements have to be filed. Get the predecessor wrong and every downstream tax decision is wrong with it.

Who Counts as the Acquirer for Tax Purposes

Treasury Regulation 1.1502-75(d)(3) sets the test. If Corporation A acquires the stock or substantially all the assets of Corporation B in exchange for A’s stock, and B’s pre-deal shareholders end up owning more than 50% of A’s fair market value, the transaction is a reverse acquisition.¹ B’s consolidated group is treated as continuing, and A becomes the new common parent on paper only.

The consequences of that label are concrete. The predecessor (usually the larger operating company whose shareholders retained the majority) keeps its tax year running without interruption. Its accounting methods, elections, and filing history carry into the combined group. The successor (typically the legal acquirer, often a shell or SPAC) closes its tax year on the acquisition date and files a short-period return for the stub of its fiscal year up to that point.¹ From then on, the combined group files consolidated returns under the predecessor’s tax identity.

This is a separate determination from the GAAP accounting conclusion, though they often line up. Identifying the predecessor early is not a formality. It sets the framework for everything below.

Tax-Free or Taxable

Before the attribute rules kick in, the threshold question is whether the deal qualifies as a tax-free reorganization or a taxable transaction. The answer shapes almost every other outcome, including basis.

Tax-Free Reorganizations

A reverse acquisition can qualify under Section 368 if it’s structured correctly. The common paths are a Type A statutory merger, a Type B stock-for-stock exchange, and a reverse triangular merger under Section 368(a)(2)(E), where the target survives as a subsidiary of the acquiring parent.² In the reverse triangular structure, the target’s former shareholders must exchange enough stock to constitute control of the surviving corporation, and the surviving company must hold substantially all of both its own and the merged entity’s properties after the deal.

Tax-free treatment is not automatic. The deal has to meet the continuity of interest requirement, meaning a meaningful portion of the consideration paid to target shareholders must be stock rather than cash. The IRS generally treats this as satisfied at roughly 40% stock, though deals seeking advance rulings usually use 50% or more. There is also a continuity of business enterprise requirement: the acquiring company must either continue the target’s historic business or use a significant portion of its assets in a business after closing.

Taxable Deals

When those requirements aren’t met, the deal is taxable. Selling shareholders recognize gain or loss on their stock, and the buyer may have options to step up asset basis (see below). Taxable structuring is sometimes chosen deliberately when the target has significant appreciated assets and the buyer wants higher future depreciation, or when the consideration is predominantly cash.

Section 382: Limits on Pre-Change Net Operating Losses

The most financially significant tax consequence of a reverse acquisition is usually the limitation on pre-change NOLs. Section 382 caps how much of a loss corporation’s pre-existing NOLs can offset income each year after an ownership change.³ The rule exists to stop companies from acquiring loss corporations mainly to absorb their tax attributes. In a De-SPAC or private-into-public reverse acquisition, it almost always applies, because the shell’s original shareholders see their ownership diluted well past the trigger.

The Ownership Change Test

An ownership change happens when one or more 5-percent shareholders increase their collective ownership in the loss corporation by more than 50 percentage points compared with their lowest ownership during the prior three-year testing period.³ Ownership is measured by value, not vote count or share count. In a typical reverse acquisition, new investors and former sponsors move from near-zero to a majority stake in one step, which clears the 50-point threshold easily. The transaction date becomes the change date, which starts the clock on every downstream Section 382 mechanic.

The Annual Limitation Formula

Once triggered, Section 382 sets a hard annual ceiling on pre-change NOL use. The formula multiplies the fair market value of the loss corporation’s stock immediately before the change by the IRS’s long-term tax-exempt rate for the month of the change.³ For ownership changes occurring in March 2026, the rate is 3.58%.⁴

A worked example makes the scale concrete. A loss corporation valued at $500 million immediately before a March 2026 ownership change has an annual Section 382 limitation of $17.9 million. No matter what the combined company earns, no more than $17.9 million of pre-change NOLs can be deducted in any single post-change year. Unused capacity carries forward, but the annual cap applies fresh each year.

Valuation is where fights with the IRS tend to happen. The pre-change value has to be reduced by capital contributions made within the two years before the change date if they were part of a plan to inflate the limitation. The Code presumes any contribution in that two-year window was made for that purpose, and the burden is on the taxpayer to prove otherwise.⁵ Stock redemptions and corporate contractions tied to the ownership change reduce the value used in the formula as well.

Built-in Gains and Losses

Section 382 also reaches unrealized gains and losses inside the loss corporation’s assets on the change date. Compare aggregate fair market value against aggregate tax basis. If value is less than basis, there’s a net unrealized built-in loss; if greater, a net unrealized built-in gain.

These positions only matter above a threshold: the lesser of $10 million or 15% of the fair market value of the corporation’s assets.⁶ Below that, they’re treated as zero. Above it, the consequences play out over a five-year recognition period after the ownership change.⁷

A net built-in loss cuts against the taxpayer. Losses recognized on those assets during the recognition period are treated as pre-change losses, subject to the annual ceiling. A net built-in gain runs the other way: gains recognized on those appreciated assets during the recognition period increase the annual limitation for that year, letting more pre-change NOLs come through. Either direction requires a detailed asset-by-asset appraisal as of the change date.

The 80% Cap Stacks on Top

Section 382 isn’t the only brake. The Tax Cuts and Jobs Act added a separate limitation that applies whether or not an ownership change occurred: NOLs generated in tax years beginning after December 31, 2017, can only offset up to 80% of taxable income in any given year.⁸ Pre-2018 NOLs are not subject to this 80% cap and can fully offset taxable income up to the Section 382 ceiling.

The two limitations stack. Post-2017 NOLs face both the annual Section 382 dollar cap and the 80% income cap, and the more restrictive of the two controls in any given year. For reverse acquisitions involving startups or recently formed targets whose losses are entirely post-2017, this double layer of restrictions can make acquired NOLs far less valuable than they look on paper. Pricing a deal off face-value NOLs alone consistently overpays.

Section 383: Credits and Capital Losses

Section 383 does for pre-change credits and net capital losses what Section 382 does for NOLs. After an ownership change, the amount of excess credits usable in a post-change year is limited to the tax liability attributable to taxable income that doesn’t exceed the Section 382 limitation.⁹ Unused general business credits, unused minimum tax credits, and excess foreign tax credits all fall within the framework. Net capital loss carryforwards are treated on the same principles. For companies whose value sits in R&D credits or investment tax credits, the Section 383 limit can matter as much as the NOL restriction.

Section 384: Preacquisition Losses Against Built-in Gains

Section 384 covers a scenario Section 382 doesn’t reach. It prevents a corporation from using its preacquisition losses to offset built-in gains recognized by a “gain corporation” after an acquisition.¹⁰ A gain corporation is one with a net unrealized built-in gain at the time of the acquisition. The rule also reaches excess credits and net capital losses.

In a reverse acquisition, this comes into play when the predecessor has significant NOLs and the successor holds appreciated assets. Section 384 keeps those NOLs from sheltering gain recognized if the successor’s appreciated assets are sold within the recognition period. It applies independently of Section 382, so both have to be run. The exception: Section 384 does not apply when both corporations were members of the same controlled group before the acquisition.

Section 269: The Anti-Abuse Backstop

Even a deal that clears every technical hurdle under Sections 382 through 384 can still be undone. Under Section 269, if the principal purpose of the acquisition was to evade or avoid federal income tax by obtaining a deduction, credit, or other allowance the acquirer wouldn’t otherwise have, the IRS can disallow those benefits entirely.¹¹ It applies when any person acquires control (50% or more of voting power or value) of a corporation, or when a corporation acquires property with a carryover basis from an uncontrolled transferor.

Where Section 382 imposes a calculable annual cap, Section 269 can wipe out the benefit completely. The IRS has discretion to allow part of a disallowed deduction or to reallocate income and deductions among the entities involved. The burden of proving a legitimate business purpose falls on the taxpayer. Deals that look driven primarily by attribute acquisition rather than genuine business rationale carry real exposure here.

What Happens to Asset Basis

Post-deal asset basis drives future depreciation and amortization, which drives taxable income for years after closing. The outcome depends on whether the reverse acquisition is tax-free or taxable.

Carryover Basis in Tax-Free Reorganizations

In a tax-free reorganization, acquired assets keep their historical tax basis. No step-up, no step-down, even if the assets have appreciated substantially. The combined entity continues on the predecessor’s existing depreciation schedules and methods. For companies acquiring a target with heavily depreciated assets worth far more than their tax basis, carryover basis is a real economic cost of choosing tax-free treatment.

Section 338 and Section 336(e) Elections

In a taxable stock acquisition, the buyer can elect under Section 338 to treat the stock purchase as a deemed asset purchase. The target is treated as if it sold all its assets at fair market value and immediately repurchased them as a new corporation, producing a stepped-up basis and higher future depreciation and amortization deductions.¹²

The distinction between the two flavors matters. A regular Section 338(g) election creates two levels of tax: shareholders pay on their stock sale, and the target recognizes gain on the deemed asset sale. That double hit usually makes a stand-alone 338(g) prohibitively expensive. A Section 338(h)(10) election is only available when the target is a subsidiary, and it collapses the two levels into one: the selling parent recognizes no gain on the stock disposition, and only the target-level deemed asset sale is taxed.¹²

A Section 336(e) election is a broader alternative, because it doesn’t require the buyer to be a corporation. The seller and target can make it unilaterally, and it covers situations where at least 80% of the target’s stock changes hands within a 12-month period. The tax mechanics mirror 338(h)(10): deemed sale, stepped-up basis. Whether any of these elections make sense turns on the immediate tax cost of the deemed sale against the present value of the increased future deductions.

Section 197 Intangibles

Where a reverse acquisition produces stepped-up basis, a large portion of the purchase price often lands in intangibles: goodwill, customer relationships, workforce in place, covenants not to compete. Under Section 197, these are amortized ratably over 15 years starting in the month of acquisition, regardless of the intangible’s actual useful life.¹³ A patent with 5 years of remaining life still gets spread over 15. In a tax-free reorganization with carryover basis, no new Section 197 deductions arise because there’s no step-up to create new intangible basis. On large deals, this single difference can be worth hundreds of millions in present value.

SRLY and the Overlap Rule

When a corporation with NOLs joins a consolidated group through a reverse acquisition, the Separate Return Limitation Year rules would normally restrict the use of those NOLs to income generated by the joining member itself, not the rest of the group. When the SRLY rules and a Section 382 ownership change apply to the same event within a six-month window, the overlap rule eliminates the SRLY limitation and leaves only the Section 382 cap.¹⁴ In most reverse acquisitions both events happen on the same day, so the overlap applies. That’s favorable: one limitation framework instead of two.

Required Filings

Substantive analysis doesn’t matter if the paperwork isn’t filed. Missing these steps can cost NOL deductions or draw penalties.

The Section 382 Ownership Change Statement

A loss corporation that has an ownership change must attach a statement titled “Statement Pursuant to § 1.382-11(a)” to its income tax return for the year of the change.¹⁵ It has to include the dates of any owner shifts or equity structure shifts, the date the ownership change occurred, and the amount of tax attributes that made the corporation a loss corporation. Include a detailed calculation supporting the 50-percentage-point test and identify the 5-percent shareholders whose changes triggered the limitation.

Consolidated Return Mechanics

After closing, the combined group files a consolidated return with the predecessor as common parent. All members of the predecessor’s old group that remain includible corporations continue on the return.¹⁶ The successor files a short-period return for the stub year ending on the acquisition date, and its income and deductions from the day after the transaction date forward roll into the predecessor group’s consolidated return.¹

Form 8594 for Asset Purchases

If the reverse acquisition involves a taxable asset purchase or a deemed asset purchase under Section 338, both buyer and seller must file Form 8594 (Asset Acquisition Statement) with their respective returns.¹⁷ The form allocates total purchase price across seven asset classes, from cash equivalents (Class I) through goodwill and going concern value (Class VII).¹⁸ The IRS requires the buyer’s and seller’s reported allocations to match, so both sides need to agree on the numbers before filing.

1
eCFR. 26 CFR 1.1502-75 – Filing of Consolidated Returns
2
Office of the Law Revision Counsel. 26 USC 368 – Definitions Relating to Corporate Reorganizations
3
Office of the Law Revision Counsel. 26 USC 382 – Limitation on Net Operating Loss Carryforwards and Certain Built-in Losses Following Ownership Change
4
Internal Revenue Service. Revenue Ruling 2026-6 – Section 382 Rates
5
Internal Revenue Service. Notice 2008-78 – Capital Contributions Under Section 382(l)(1)
6
Federal Register. Regulations Under Section 382(h) Related to Built-In Gain and Loss
7
Internal Revenue Service. Notice 2003-65 – Built-in Gains and Losses Under Section 382(h)
8
Office of the Law Revision Counsel. 26 USC 172 – Net Operating Loss Deduction
9
Office of the Law Revision Counsel. 26 USC 383 – Special Limitations on Certain Excess Credits
10
Office of the Law Revision Counsel. 26 USC 384 – Limitation on Use of Preacquisition Losses to Offset Built-in Gains
11
Office of the Law Revision Counsel. 26 USC 269 – Acquisitions Made to Evade or Avoid Income Tax
12
Office of the Law Revision Counsel. 26 USC 338 – Certain Stock Purchases Treated as Asset Acquisitions
13
Office of the Law Revision Counsel. 26 USC 197 – Amortization of Goodwill and Certain Other Intangibles
14
eCFR. 26 CFR 1.1502-21 – Net Operating Losses
15
eCFR. 26 CFR 1.382-11 – Reporting Requirements
16
Internal Revenue Service. Revenue Procedure 2002-32
17
Internal Revenue Service. Instructions for Form 8594 – Asset Acquisition Statement
18
Office of the Law Revision Counsel. 26 USC 1060 – Special Allocation Rules for Certain Asset Acquisitions