Cost Segregation Inside a Partnership: How Depreciation Gets Allocated Among Members
The Deduction Is Only Half the Question
When a single owner runs a cost segregation study, the deduction goes to that owner and the analysis moves on to whether the passive activity rules allow its use. When a partnership or multi-member LLC runs one, an additional question appears first: who gets the deduction?
The answer is not automatically "everyone in proportion to ownership." Partnership tax allows allocations that differ from ownership percentages, and real estate partnerships use that flexibility constantly. It is also where the most expensive mistakes get made.
A $400,000 first-year deduction allocated to a partner who cannot use it is worth far less than the same deduction allocated to one who can. Getting the allocation right is a planning exercise, not a compliance afterthought.
The Substantial Economic Effect Framework
Section 704(b) governs. An allocation stated in the operating agreement is respected if it has substantial economic effect, or if it is otherwise in accordance with the partners' interests in the partnership.
The economic effect prong is mechanical and has three requirements: capital accounts must be maintained in accordance with the regulations, liquidating distributions must be made in accordance with positive capital account balances, and there must be either an unconditional deficit restoration obligation or a qualified income offset provision.
The substantiality prong is the judgment-heavy part. An allocation lacks substantiality if its after-tax effect on one partner is enhanced and no partner is substantially diminished, considered on a present-value basis. Allocating depreciation to the partner in the highest bracket, with an offsetting allocation of gain later, is the classic pattern that gets tested here.
Why Depreciation Allocations Get Special Attention
Depreciation deductions attributable to nonrecourse debt cannot have economic effect, because the partner bearing them has no economic risk. The regulations handle this through the nonrecourse deduction rules and minimum gain chargeback provisions in Regulation 1.704-2.
Most real estate partnerships are financed with nonrecourse debt, which means a substantial share of the depreciation from a cost segregation study will be nonrecourse deductions. Those must be allocated in a manner reasonably consistent with some other significant partnership item, and the agreement must contain a minimum gain chargeback.
Operating agreements drafted from generic templates frequently lack these provisions, or contain them in boilerplate that conflicts with the economic deal the partners actually struck. A large accelerated deduction is what surfaces the conflict. AE Tax Advisors addresses the capital account mechanics in their guide to Section 704(b) capital accounts and partner allocations.
Basis and At-Risk Limits Cap What a Partner Can Use
Even a valid allocation does not guarantee a usable deduction. Three limitations apply in sequence at the partner level.
First, Section 704(d) limits deductions to the partner's adjusted basis in the partnership interest. Basis includes the partner's share of partnership liabilities, and for real estate partnerships the share of nonrecourse debt under Section 752 is often what makes a large depreciation allocation usable at all.
Second, the at-risk rules of Section 465 limit deductions to amounts the partner is economically at risk for. Qualified nonrecourse financing secured by real property is generally treated as at-risk, which is why real estate is treated more favorably here than most activities.
Third, the passive activity rules of Section 469 apply. A limited partner or a passive member faces the full passive loss regime, and a cost segregation deduction that clears basis and at-risk can still suspend at this stage.
Syndications and the Passive Investor Problem
In a syndication, most investors are passive by design. They contribute capital, take a limited role, and cannot claim real estate professional status or material participation on the deal.
Their share of the cost segregation deduction is a passive loss. It offsets passive income from that or other passive activities and otherwise suspends, carrying forward until they have passive income or dispose of the entire interest in a fully taxable transaction.
This is not a defect. Suspended losses released on disposition can shelter a substantial portion of the exit gain, which is frequently the point. But sponsors who market first-year deductions to passive investors without explaining the suspension mechanics create expectations that the K-1 will not meet.
The Section 754 Election and Incoming Partners
When a partnership interest changes hands, the new partner's outside basis reflects what they paid, but the partnership's inside basis in its assets does not adjust unless a Section 754 election is in effect.
Without the election, an incoming partner who paid a premium for an appreciated property inherits a share of depreciation computed on the partnership's old, lower basis. With the election, a Section 743(b) adjustment steps up that partner's share of inside basis, generating additional depreciation allocated solely to them.
Cost segregation and a 754 election interact well. The step-up can itself be allocated across asset classes, meaning a portion lands in 5-year and 15-year property rather than all of it in the 39-year structure. That is an underused planning combination in partnerships with turnover.
What to Do Before Commissioning the Study
Read the operating agreement first. Confirm that capital accounts are maintained under the 704(b) rules, that a qualified income offset or deficit restoration obligation is present, and that a minimum gain chargeback exists. If any is missing, amend before the deduction arrives, not after.
Model the allocation partner by partner against basis, at-risk, and passive limitations. The output you want is not "the study produces $400,000" but "partner A can currently use $180,000, partner B suspends $90,000, partner C is basis-limited at $40,000."
That model is what tells you whether the study should be run this year, next year, or paired with a capital contribution or debt restructuring that creates the basis to absorb it.