PTP Passive Loss Rules: Why Your MLP Losses Are Trapped Under section 469(k)

Most passive activities follow a simple rule: passive losses offset passive gains. If you own a rental property that generates a loss and a limited partnership that generates income, the loss offsets the income.

PTPs are different. Under IRC section 469(k), each publicly traded partnership is its own isolated silo. Losses from one PTP can only offset income from that same PTP. They cannot offset:

• Income from other PTPs (EPD losses cannot offset ET income)
• Income from non-PTP passive activities (rental properties, private partnerships)
• W-2 wages or active business income
• Portfolio income (dividends, interest, stock capital gains)

Non-PTP interests — private LPs and funds — net under the general §469 rules instead, and untangling their suspended-loss history is part of a private partnership basis reconstruction.

In most years, your MLP K-1 shows a net loss in Box 1 (ordinary business income). This happens because the partnership's depreciation and amortization exceed its taxable income — even though it's distributing cash to you.

That loss is suspended. It sits on your return (reported on Form 8582) and carries forward indefinitely. Each year, the balance grows if the MLP continues generating net losses. In years where the MLP generates net income, suspended losses are released to offset that income — but only from the same PTP. Gain on selling units of the PTP is income from that PTP too (next section).

The Form 8582 instructions treat gains and losses from disposing of less than an entire interest in an activity as part of that activity’s net income or net loss for the year (Form 8582 instructions, “Disposition of Less Than an Entire Interest”). The regulation treats gain on disposing of an interest in a passive activity held through a partnership as passive activity gross income of that activity, except as the §469 regulations provide otherwise (Temp. Reg. §1.469-2T(c)(2)(i)(A)); gain on a partnership interest is allocated among the partnership’s activities, and any part allocated to its portfolio assets is not passive (§1.469-2T(e)(3)). For a PTP, the instructions then say to combine current-year income, gains and losses with prior-year unallowed losses; on an overall loss, the losses are allowed only to the extent of the income and the excess carries forward (Form 8582 instructions, “Special Instructions for PTPs”; IRC §469(b)).

So when you sell part of an MLP position, the gain on the units sold, both the section 751 ordinary portion and the capital gain, is passive income of that PTP for the year (apart from any part allocated to the partnership’s portfolio assets), and the PTP’s losses, current-year and prior-year unallowed, are allowed to the extent of the PTP’s passive income for the year. What the sale does not do is free the losses against wages or other income. That takes a disposition of your entire interest in the PTP: a fully taxable transaction to an unrelated party (next section), or a transfer at death, which releases losses only above the basis step-up (IRC §469(g)(2)).

Selling the entire interest changes the arithmetic only when the PTP’s losses for the year, current-year plus prior-year unallowed, exceed its income for the year including the sale gain: that overall loss is then not limited by the passive loss rules for that year (IRC §469(g)(1)(A); Form 8582 instructions, “Special Instructions for PTPs”). When the PTP’s income for the year is at least as large as its losses, a partial sale and a complete sale use the same amount of loss.

Suspended losses leave the passive rules when you dispose of your entire interest in the PTP in a fully taxable transaction to an unrelated party (IRC §469(g)(1)(A)). For a PTP the interest is the whole partnership: you are not treated as having disposed of your entire interest in any activity of the PTP until you dispose of your entire interest in the partnership (IRC §469(k)(3)). “Entire interest” means every unit of this PTP that you own; on a joint return, your spouse’s units count too (Reg. §1.469-1T(j)(1)). If the buyer is related to you under §267(b) or §707(b)(1), the release waits until the interest is acquired by an unrelated person in a fully taxable transaction (IRC §469(g)(1)(B)).

When you sell the entire interest:

1. Calculate your gain or loss on the sale: the amount realized is the cash plus your share of partnership liabilities that the buyer takes over (Schedule K-1 Item K; IRC §752(d); Reg. §1.1001-2(a)(4)(v)), less your adjusted basis, which already includes that share
2. Separate section 751 ordinary income from capital gain
3. Combine the PTP’s income and gain for the year with its current-year losses and all prior-year unallowed losses
4. If the result is an overall loss, that loss is not limited by the passive loss rules for that year and is treated as a loss that is not from a passive activity (IRC §469(g)(1)(A); Form 8582 instructions, “Special Instructions for PTPs”)

Passive PTP items are not reported on Form 8582, Passive Activity Loss Limitations. The instructions say not to report passive income, gains, or losses from a PTP on the form; you report the gains and allowed losses on the forms and schedules normally used and write “From PTP” to the left of each entry (Form 8582 instructions, “Special Instructions for PTPs”). When unallowed losses come from more than one activity of the PTP or belong on different forms, the instructions say to allocate them pro rata, and a Tip in the instructions says to use Parts VII, VIII and IX of Form 8582 to allocate and keep a record of them. Your tax software should carry the unallowed PTP losses forward automatically year to year, but verify. If you switch tax software or preparers, confirm the suspended loss balance for each PTP transferred correctly.

When you die holding MLP units, two things happen simultaneously:

1. Your heirs receive a stepped-up basis to fair market value
2. Your suspended passive losses are released — but only to the extent they exceed the step-up amount

For appreciated MLPs (where FMV exceeds adjusted basis), the step-up typically absorbs most or all of the suspended losses. The losses effectively disappear — which is why some investors see the hold-forever strategy as the optimal exit.