Tax Capital, §704(b) Capital, and Outside Basis: A Search Fund Primer

When a search fund buys into a target organized as a flow-through entity, three different numbers get created at closing, and they are rarely tracked correctly. Tax capital, Section 704(b) capital, and outside basis each mean something different and are tracked on different schedules, and the gap between them is exactly where carryover basis, built-in gain, and step-up mechanics live. Most search fund deals feature some form of contributed or rolled-over property, whether that is a , , or units bought directly into an existing multi-member LLC, and each of these numbers (tax capital,704(b) capital, and outside basis) moves differently depending on deal structure.

Members Should Understand Tax Capital, Book Capital, and Basis

Start with understanding the vocabulary because these terms get used loosely and that’s where confusion creeps in.

• Tax capital is a partner’s capital account measured under tax accounting rules: cumulative cash or property contributions, plus allocated tax income, less cash or property distributions and allocated tax loss. It’s the number on the tax-basis capital account rollforward on each partner’s Schedule K-1. Tax capital represents a partner's share of the partnership's net tax basis, meaning the inside tax basis of assets minus liabilities. It should equal tax basis balance sheet.
• 704(b) “book” capital is a separate account, kept under the partnership agreement’s economic-deal rules. Generally, it represents each partner’s share of the fair market value at the inception or revaluation events. The property contribution (rollover) will increase the contributing partner's §704(b) capital account by the fair market value of the contributed property, net of any liabilities the partnership assumes. Tax capital always maintains the old, carryover tax basis of the contributed property. The gap between the carryover tax basis and the fair market value (FMV) §704(b) book value is built-in gain or loss, and §704(c) requires the partnership to specially allocate tax items from that property back to the original contributor.
• Outside basis is a different calculation altogether: tax capital plus the partner’s share of partnership liabilities. It’s what determines how much tax loss a partner can deduct, and what a partner uses to compute gain or loss on selling their own interest. Because it includes debt, it’s often the largest of the three numbers (especially in a leveraged deal). Generally, partners are responsible for maintaining their own basis schedules, although tax capital and the liability shares reported on the K-1 are the usual starting point.

One important note on maintenance: all three buckets require separate, annual maintenance. A related capital maintenance exercise that is common in search fund/private equity tax compliance is the tax basis balance sheet. This is a balance sheet that reconciles GAAP and tax capital by tracking the tax adjustments on an asset-by-asset basis. Your tax adviser should be tracking each schedule annually.

Why This Shows Up in Almost Every Search Fund Deal

Very few search fund acquisitions are a clean, all-cash buyout with no seller rollover and no existing minority partners. Most feature some form of contributed property with a carryover basis such as a seller “rolling” a portion of equity into the new operating entity, or a buyer acquiring units directly from existing partners in a target that’s already a multi-member LLC. Either way, the tax capital and §704(b) capital of at least one partner in the deal begins mismatched, and that mismatch drives significant consequences at a future liquidation event. The two examples that follow show how differently this plays out depending on which fact pattern you’re in.

Example 1: Buyout Plus Rollover Into a New Operating Company (OpCo)

In this example, the target LLC is worth $10 million, wholly owned by seller, with $1 million of tax capital (seller’s basis) and $1 million of debt. The search fund forms an OpCo partnership: Partner A (search fund) pays the seller $8 million cash for 80% of target, and Partner B (seller) rolls the remaining 20% into the OpCo in exchange for OpCo units. A and B end up as 80/20 partners in the OpCo.

Because the seller owned 100% of the target before the deal, the target is a disregarded entity for tax purposes — there’s no partnership interest to buy yet. Under the fact pattern in Rev. Rul. 99-5, this is treated as two steps: First, A buys an 80% undivided interest directly in target’s underlying assets for cash. Buyer gets fresh “stepped-up” basis with tax and §704(b) capital being equal. Secondly, the seller contributes their remaining respective asset interests into the newly formed OpCo in exchange for OpCo units. The seller takes a carryover tax basis in their OpCo units, but 704(b) will reflect the FMV of the contributed property. The OpCo partnership itself has split basis in all the underlying assets: 80% of each asset is stepped up to FMV, but the remaining 20% takes carryover tax basis.

The structuring detail matters: It’s the reason this example needs no §754 conversation at all, and Example 2, below, can’t avoid one.

From the search fund’s own seat, this is about as clean as it gets with no gap or built-in gain riding along with your units. The built-in gain is governed by the OpCo’s operating agreement and impacts how depreciation/amortization are allocated and how gain/loss is allocated upon disposition of the contributed assets. The built-in gain allocation among the individual assets is governed by IRC §1060, and it is common in search fund/private equity deals for most of the built-in gain to be allocated to self-created goodwill. This goodwill is “off-the-books” for tax purposes and Because most of the built-in gain on the rolled equity usually sits in goodwill, the §704(c) method choice largely decides how goodwill amortization economics split between the buyer and the rollover seller.

Example 2: Buying Units in an Existing Multi-Member LLC

Consider the same $10 million valuation and $1 million debt — but now the target is already a partnership, owned 50/50 by Partners X and Y, with $1 million of aggregate tax capital ($500K each) and no history of contributed property. The search fund’s Partner A buys 80% of the outstanding units, pro rata from X and Y, for $8 million cash. There’s no new entity and no contribution — just a straight purchase of existing partnership interests.

This is where outside basis in partnership acquisitions can diverge sharply from the partnership’s inside basis.

This is the fact pattern search fund buyers run into constantly, and it behaves nothing like Example 1. Buying units doesn’t touch the partnership’s own basis in its assets. That basis stays exactly where it was.

Absent a valid §754 election in place at closing, A gets zero basis step-up for it and misses out on millions in depreciation and amortization during the hold period. A §743(b) adjustment is what fixes this, and it’s personal to A alone; it doesn’t change X’s or Y’s own numbers, and it isn’t automatic.

The Bargain-Price Variant: When Basis Runs the Other Way

Same target, same 80% purchase — but say Partner A pays only $500,000 for it, standing in for a business genuinely worth less than the partnership’s books suggest. That implies a 100% equity value of $625,000 and a total asset value of roughly $1.625 million once the $1 million of debt is added back against the partnership’s $2 million of tax basis in those same assets.

That $375,000 excess of basis over value clears the $250,000 threshold under §743(d). Past that line, the downward basis adjustment isn’t optional, and it applies to A’s share whether or not the OpCo ever makes a §754 election.

A Specific Word on Personally Guaranteed Debt

Every debt allocation in the two examples above assumed liabilities are shared pro rata to ownership (80/20, 50/50). That assumption is reasonable for nonrecourse debt but may not be realistic given how many deals are funded.

Recourse debt is not allocated by ownership percentage under §752 but instead is allocated to whichever partner bears the economic risk of loss for it. A personal guarantee shifts that risk, and the basis that comes with it, to the guarantor regardless of ownership split. A personal guarantee makes debt recourse.

Small Business Administration (SBA) 7(a) financing (a common source of acquisition debt in search fund deals) generally requires a personal guarantee from anyone owning 20% or more of the borrower, and bank lenders frequently ask for the same thing outside the SBA program where leverage is thing. At 80% of OpCo, Partner A is squarely inside that requirement on almost any leveraged search fund deal.

Recompute Example 1 on that basis: If Partner A personally guarantees the full $1,000,000 of OpCo debt, instead of the 80/20 split assumed above, the allocation and both partners’ outside basis shifts:

A $200,000 swing on a $1 million debt balance, in opposite directions for A and B. That swing scales with the debt so on a more heavily levered deal it gets larger creating more outside basis for Partner A and more room to absorb losses in the leveraged, often loss-heavy early years after a search fund closes without hitting basis limitations.

It’s important to get the actual guarantee and indemnity structure from the credit agreement into your tax advisor’s hands. Recourse debt allocations are driven off the loan documents rather than the cap table, and a searcher’s ability to claim losses, especially in earlier years, may depend on correctly allocating any recourse debt.

What This Means for Your Deal

• Get the guarantee structure confirmed before anything else. It moves the outside basis numbers more than the ownership split does, and it’s the assumption most likely to be wrong if you skip it.
• Know which fact pattern you’re actually in. A rollover into a newly formed entity (Example 1) behaves completely differently, tax-mechanically, than buying units in an already-existing multi-member LLC (Example 2). These are just two examples; know the structure and the tax reporting obligations behind it.
• Confirm the §754 election status early. If you’re buying into an existing multi-member LLC, find out whether a valid election is already on file, or agreed to in the operating agreement. If it isn’t, decide before closing whether to make one since it’s a one-way commitment, binding on every future transfer and distribution, and revoking it requires IRS consent.
• Run the built-in-loss math whenever you’re buying below book. If the target’s inside tax basis in its assets exceeds what you’re implicitly paying for them by more than $250,000, a downward adjustment is required under §743(d) with no way around it. Discuss a 704c method with the attorneys or accountants before signing a deal with a rollover component.

None of this changes the economics of a deal on its own, but it changes who ends up bearing basis-related costs and who captures the tax benefits. This is exactly the kind of thing that should be on the table during pre-close, not discovered after you’ve closed.

This content is for general informational purposes only and does not constitute tax, legal, or professional advice. Readers should consult their tax advisor regarding their specific situation before making any tax-related decisions.