MLP Stepped-Up Basis at Death: The Hold-Forever Strategy

IRC §1014 is straightforward in concept: at death, the heir's cost basis in inherited property resets to fair market value on the date of death (or the alternate valuation date — six months later — if the executor elects it on the estate tax return).

For MLP investors, this means:

• ALL cumulative basis erosion from distributions is wiped out. Decades of return-of-capital distributions that reduced basis year after year become irrelevant. The slate is clean.
• The heir starts fresh — as if they purchased the units at the market price on the date of death. Their new basis is fair market value, not the decedent's eroded basis.
• This applies to ALL partnership interests, including publicly traded partnerships (PTPs) and MLPs. There is no MLP-specific exception to §1014.

The step-up doesn't just reset a number on a spreadsheet. It eliminates three separate categories of embedded tax liability that would have been triggered on a lifetime sale:

This is the one area where death is not a complete win. Suspended passive losses under §469(k) — the losses that accumulated because PTP losses can only offset income from that same PTP — do NOT transfer to heirs. They die with the decedent.

But there's a partial recovery: Suspended losses ARE deductible on the decedent's final tax return (the return filed for the year of death). However, the deduction is limited: under §469(g)(2), only the excess of suspended losses over the step-up in basis is deductible.

In practice: For long-held MLPs, the step-up is almost always larger than the suspended losses. This means the suspended loss deduction at death is typically small or zero. This is the one "cost" of the hold-forever strategy — suspended losses that would have been valuable on a lifetime sale (offsetting §751 and capital gain under §469(g)) become largely irrelevant at death because the step-up eliminates the gain they would have offset.

When a partner dies and their interest transfers to an heir, there's a partnership-level adjustment that needs to happen. The partnership's "inside basis" in its assets (what the partnership paid for its pipelines, plants, and equipment) doesn't automatically match the heir's new "outside basis" (the stepped-up FMV).

Under IRC §743(b), if the partnership has a §754 election in effect, the partnership makes an optional basis adjustment to align its inside basis with the heir's stepped-up outside basis. Here's what that means practically:

• For large MLPs with §754 elections (most publicly traded partnerships maintain one), this adjustment happens automatically when the transfer is reported.
• The practical effect: The heir's future K-1s reflect the stepped-up basis, not the decedent's eroded basis. Depreciation allocations, income calculations, and distribution character are all computed based on the new basis.
• If the MLP does NOT have a §754 election (rare for publicly traded partnerships, but possible), the inside basis adjustment doesn't happen. The heir may face more complex basis tracking because their outside basis (FMV) differs from their share of the partnership's inside basis.

Illustrative example. Actual results depend on distribution growth, unit price changes, K-1 allocations, and tax law changes over the holding period. Past distributions are not indicative of future distributions.

The hold-forever strategy is powerful, but it's not risk-free. Honest assessment of the risks:

• Tax law can change. The stepped-up basis under §1014 has been politically targeted multiple times. The Biden administration proposed eliminating it in 2021. If §1014 is modified or eliminated in the future, the hold-forever strategy breaks. Currently (March 2026), the step-up is intact — but a 30-year strategy requires faith that Congress won't change the law.
• MLP can convert to C-corp. If your MLP converts (like Antero Midstream did in 2019), the stepped-up basis still applies to the shares you hold at death, but the ongoing tax treatment changes. You'd receive 1099-DIVs instead of K-1s, and the tax-deferred distribution character disappears going forward.
• MLP can cut distributions. PAA cut from $1.44 to $0.18 during COVID. The multi-generational math only works if the MLP remains a going concern with reasonable distributions. Concentration in a single MLP amplifies this risk.
• Sector risk. MLPs are concentrated in energy infrastructure. A structural decline in fossil fuel demand over 30–50 years could impair the strategy. The OBBBA's expansion of qualifying PTP activities (hydrogen, carbon capture, renewable fuels) partially mitigates this by broadening what MLPs can invest in.
• Liquidity commitment. You're planning to hold potentially illiquid positions for decades. Smaller MLPs (NRP, BSM, DKL) have low trading volumes. Even large MLPs can experience periods of illiquidity during market stress.
• Estate planning complexity. MLP positions require proper handling in the estate — notifying transfer agents, filing the decedent's final K-1, ensuring the §743(b) adjustment is made. An executor unfamiliar with partnerships can create expensive mistakes.

In community property states, married MLP investors get an additional, significant benefit that's often overlooked.

Under normal rules (common-law states), when one spouse dies, only the decedent's half of jointly-owned property receives a stepped-up basis. The surviving spouse's half retains its original (eroded) basis.

In community property states, when one spouse dies, BOTH halves of community property receive a stepped-up basis — not just the decedent's half. The surviving spouse's basis also resets to FMV.

For an MLP portfolio with deep basis erosion, the community property double step-up effectively eliminates the entire embedded tax liability on the first death — not just half of it. If the surviving spouse then continues holding, the cycle restarts with full fresh basis.