Introduction: C corporation carve-outs and the value of tax attributes
Strategic carve-outs by C corporations—whether of a company’s division, subsidiary or distinct business line—have become an essential tool for portfolio optimization, capital deployment and enhancement of shareholder value.
However, valuable tax attributes—such as net operating losses (NOLs), tax credits, section 163(j) interest carryforwards and existing tax basis in goodwill and intangibles—are often overlooked until late in the transaction process. These attributes can serve as significant economic assets, providing opportunities to shield gain, reduce cash taxes and improve deal economics for both sellers and buyers.
Tax attributes as a value lever
Tax attributes directly influence after‑tax proceeds for sellers and post‑close cash flows for buyers. Loss carryforwards, interest expense limitations, tax credits and existing tax basis can all serve as economic assets—but only to the extent they can be used. Whether these attributes remain with the business, are limited after a transaction or can be monetized through pricing is often a key negotiating point in carve‑outs.
Tax attributes in a deal often include:
- NOLs: NOLs enable corporations to offset future taxable income with past losses. In carve-outs involving an asset sale, sellers can use NOLs to shelter transaction gains, thus minimizing tax leakage. In a stock sale, NOLs may transfer to the buyer—subject to post-change limitations as explained below—providing a valuable shield for the carved-out business’s future profitability.
- Tax basis: The basis of assets or stock affects the recognized gain or loss. Stock sales typically result in a carryover basis in the assets held by the target corporation unless a section 338 election is made (rare for C corporations due to double taxation.
- Tax credits: Unused credits, like general business credits, may offset post-transaction taxes, though their availability may be limited by various tax rules and may be reduced after ownership changes.
- Section 163(j) interest carryforwards: Disallowed interest expense under section 163(j) can generally be carried forward indefinitely. These carryforwards are treated as pre-change losses for purposes of section 382 and are subject to the same limitation regime as NOLs.
Navigating limitations on tax attribute use
When a carved‑out business undergoes a significant ownership change, such as via a stock sale to a new buyer, the rules under section 382 may limit the annual use of certain tax attributes, such as NOLs. Although these limitations generally do not eliminate the attributes, they may significantly defer their utilization, reducing their economic value and potentially increasing post‑transaction cash tax liabilities.
Section 382 places limitations on the use of NOLs and other pre-change tax attributes following an “ownership change”—generally when the ownership of 5% shareholders increases by more than 50 percentage points over a rolling three-year period.
After such a change, the annual use of pre-change losses is capped by the “section 382 limitation,” which is calculated as the loss corporation’s equity value multiplied by the long-term tax-exempt rate (LTTR). Any unused limitation is generally carried forward.
Built-in gains and losses: Section 382(h) and Notice 2003-65
Many carve‑out businesses have assets that have appreciated in value prior to the transaction, such as technology, customer relationships or other intangibles. The section 382 tax rules allow certain portions of that pre‑transaction appreciation, when recognized after closing, to increase the annual limit on tax attribute usage.
Section 382(h) governs the treatment of net unrealized built-in gains (NUBIG) and net unrealized built-in losses (NUBIL), which are economic items accrued before but recognized after an ownership change. Recognized built-in gains (RBIG) can increase the section 382 limitation, allowing for greater NOL usage. Recognized built-in losses (RBIL), however, are subject to the section 382 limitation.
Notice 2003-65 provides two safe-harbor methods for identifying RBIG and RBIL:
- The section 338 approach: This approach, favorable to built-in gain corporations, compares actual post-change realization to a hypothetical section 338 election scenario. It may result in higher recognition of RBIG and thus a larger section 382 limitation.
- The section 1374 approach: Modeled after the S corporation built-in gain rules, this approach focuses on whether the income would have been recognized under accrual accounting pre-change. It is generally more conservative and often limits the identification of RBIG.
Taxpayers can choose either approach for each ownership change but must apply it consistently. Careful selection and modeling can materially increase the available tax shield and directly affect deal value.
