When partnerships or LLCs (taxed as partnerships) merge or sell, especially when rollover equity is involved, an overlooked fundamental question drives the analysis: is it a sale, a merger, or both?
The answer isn’t always clear. In today’s active market for rollup transactions and private equity deals, this distinction can have significant tax consequences for both buyers and sellers. When a partnership is sold to another partnership and the sellers “roll over” part of their equity, retaining ownership in the new entity, the transaction becomes a hybrid. It includes both a sale (cashing out part of the ownership) and a rollover contribution (investing part of the ownership into the buyer’s partnership). But that hybrid structure creates uncertainty. If the selling partnership terminates, the transaction is treated as a sale. If it doesn’t, it may be considered a merger or consolidation, terms the tax code never fully defines. In fact, the Treasury regulations under §1.708-1 purposely left “merger or consolidation” undefined, acknowledging that partnership combinations often defy simple categorization.
Under Internal Revenue Code §708(a), a partnership continues unless it is terminated. But what does “termination” really mean? Historically, the “technical termination rule” provided a clear test: a partnership was considered terminated if 50 percent or more of the total interests in capital and profits were sold or exchanged within 12 months. That bright-line rule was repealed by Congress beginning in 2018 under the Tax Cuts and Jobs Act (TCJA), removing what was once a clear signal of when a partnership ended. Now, the analysis focuses on whether the business itself ceases, or the partnership form no longer exists, a facts-and-circumstances determination that leaves more room for interpretation and more uncertainty in rollover deals.
A partnership terminates when no part of its business or financial operations continues. However, if any business activity remains, even winding up affairs or distributing assets, the partnership technically continues to exist. For example, in Harbor Cove Marina Partners v. Commissioner (2004), the Tax Court held that a partnership remained alive because of ongoing litigation, even after it had sold most assets. Similarly, a partnership also terminates if it can no longer be considered a partnership, say, when one partner buys out all others and the entity becomes a single-owner LLC, which is disregarded for tax purposes.
The IRS’s Revenue Ruling 99-6 continues to guide practitioners on how to treat sales transactions. In one example, a partner sells its entire interest to another. The seller recognizes capital gain or loss under §741 (subject to hot asset rules under §751). While the buyer is treated as if the partnership had been liquidated, and the buyer then purchased the assets. In another, both partners sell their entire interests to a third-party buyer, who is treated as purchasing all the assets directly, and the old partnership terminates. Either way, the business continues under a new owner, but the partnership terminates and thus resulting in a sale for tax purposes.
If the selling partnership doesn’t terminate, however, the transaction is treated as a merger under §708(b)(2)(A). A merger occurs when two or more partnerships combine into one, often using partnership equity as part of the consideration. The surviving partnership is typically the one whose partners own more than 50 percent of the capital and profits of the combined entity. Under Treasury Regulation §1.708-1(c)(3), the “assets-over” form is the default, meaning the terminated partnership is treated as contributing its assets and liabilities to the surviving partnership in exchange for partnership interests.
In a sale and rollover transaction, some partners sell all or part of their interests for cash, while others “roll over” their equity into the acquiring partnership in exchange for acquirer’s equity. Under the “merger cash-out rule” in Treasury Regulation §1.708-1(e)(4), the cash-out portion is recognized as a sale, while the rollover portion is treated as a contribution to the continuing partnership, resulting in a partial merger. The result: one transaction, two very different tax treatments.
Buyers and rollover sellers must navigate issues such as allocation issues from the step-up in tax basis from a §§754 election under 743(b), built-in gains triggered under §704(c) or “anti-mixing bowl” traps under §§704(c)(1)(B) and 737, and changes in holding periods and accounting methods, to name a few. It’s a complex balancing act where structure determines outcome, and where small variations in how the deal is papered can shift the tax treatment entirely.
For business owners and dealmakers, partnership sales involving rollover equity remain a gray area, a conundrum born from the repeal of the technical termination rule and the flexible nature of partnership law. The key is careful planning: identifying whether the deal qualifies as a sale because of termination, or a continuation treated as a merger or partial merger under §708. Then documenting every step to support that classification. As transactions grow more creative, the line between “sale” and “rollover” continues to blur, but with thoughtful structuring, both buyers and sellers can achieve clarity and favorable tax outcomes.
