By Marco Bozem • June 2026 • 9 min read
Natural gas MLPs are one of the most misunderstood corners of the income investing universe. The tax structure scares off most retail investors — K-1 forms, partnership accounting, UBTI rules — and that's precisely why the yields stay high. The market underpays for these assets because the paperwork is complicated.
Here's the core argument: North American natural gas infrastructure is essentially a regulated toll road. Every cubic foot of gas flowing through an Enterprise Products or Energy Transfer pipeline generates fee income. The underlying commodity price? Mostly irrelevant. What matters is volume throughput × fee rate. That's a fundamentally different risk profile than upstream oil & gas.
A Master Limited Partnership (MLP) is a US publicly traded entity that passes nearly all income to "unitholders" rather than retaining it. The IRS classifies 90%+ of income as "qualifying income" (natural resource transportation and processing). This means the partnership itself pays no corporate income tax — the tax obligation flows through to unitholders.
For natural gas specifically, this applies to:
| MLP | Ticker | Yield | Distribution/Qtr | Coverage Ratio | Debt/EBITDA |
|---|---|---|---|---|---|
| Enterprise Products Partners | EPD | ~6.8% | $0.535 | 1.7x | 3.0x |
| Energy Transfer | ET | ~8.1% | $0.325 | 1.9x | 4.2x |
| MPLX LP | MPLX | ~8.4% | $0.9475 | 1.5x | 3.6x |
| Magellan Midstream* | MMP (acquired) | — | — | — | — |
| Plains All American | PAA | ~7.2% | $0.27 | 2.1x | 3.4x |
*Magellan acquired by ONEOK in 2023. Data approximate; verify before trading. Not financial advice.
EPD is the benchmark MLP. 27 consecutive years of distribution growth. Coverage ratio comfortably above 1.5x. Balance sheet: investment-grade rated (Baa1/BBB+), debt/EBITDA ~3.0x — conservative for a capital-intensive business. The founding Duncan family holds ~32% of units, directly aligning management with distribution stability.
EPD owns ~50,000 miles of pipeline, 14 deep-water docks, 23 natural gas processing plants, and storage capacity of ~160 MMBbls. Approximately 85% of revenues are fee-based with no direct commodity price exposure. The other 15% is commodity-linked (principally NGL marketing margins) — manageable.
The K-1 tax form. Most retail brokerage platforms handle K-1s poorly. IRA and 401k investors avoid MLPs due to UBTI (Unrelated Business Taxable Income) rules that can create phantom tax liability inside tax-exempt accounts. European investors face withholding complexity. The result: EPD trades at a structural discount to equivalent C-Corp pipeline companies.
For a taxable US account, EPD's distributions typically include a substantial return-of-capital (ROC) component — typically 50–80% — which reduces the cost basis rather than triggering immediate income tax. This defers taxation. For a German investor (Freistellungsauftrag), the tax treatment is more complicated — EPD often classified as a "Sonstige Einkünfte" rather than standard dividends, creating administrative overhead. That's precisely why I focus primarily on C-Corp alternatives like Enbridge or TC Energy for non-US portfolios.
Energy Transfer pays ~8.1% — one of the highest yields in the US pipeline sector. The network spans ~125,000 miles across 44 US states, covering natural gas, NGL, crude oil, and refined products. The diversification is real. The leverage (Debt/EBITDA ~4.2x) is at the high end but manageable given the largely fee-based revenue model.
The risk: ET has a history of aggressive M&A (Enable Midstream 2021, Sunoco Logistics 2017, Williams Cos bid failed) and management decisions that have previously disadvantaged unitholders. The distribution was cut from $0.305 to $0.15 per quarter in 2020 (COVID), then reinstated and grown. That scar requires a risk premium in the yield — hence the ~8% vs EPD's ~7%.
My view: ET is fine for investors who understand the execution risk and are comfortable with the leverage profile. Not for conservative income mandates.
MPLX was spun out of Marathon Petroleum Corporation (MPC) and remains majority-owned by MPC (~64% of units). This creates an unusual dynamic: MPLX's customers are largely captive — Marathon's refineries ship crude through MPLX pipelines and process products through MPLX terminals. Volume is sticky by contract design.
Distribution coverage ratio ~1.5x. MPLX generated ~$5.6B of adjusted EBITDA in 2025, distributable cash flow comfortably covers the $3.7B in annual distributions. The 8.4% yield reflects the K-1 overhang, not fundamental business weakness. MPLX has steadily grown distributions (CAGR ~5% since IPO), making it compelling on a total-return basis for those willing to handle K-1 paperwork.
If you're not a US taxpayer, MLPs often create more administrative complexity than they're worth. The good news: several pipeline operators have converted to C-Corp structure or were always C-Corps, offering comparable exposure without K-1 headaches:
| Company | Ticker | Structure | Yield | Note |
|---|---|---|---|---|
| Enbridge | ENB | C-Corp (Canada) | ~6.8% | Largest NA natural gas pipeline; EU dividend withholding 15% |
| TC Energy | TRP | C-Corp (Canada) | ~6.5% | NGTL system, Canadian Mainline; standard Canadian dividend treatment |
| Kinder Morgan | KMI | C-Corp (converted 2014) | ~5.8% | Largest US natural gas pipeline network; no K-1 |
| ONEOK | OKE | C-Corp (converted 2017) | ~5.5% | Magellan integration; NGL and natural gas |
For MLPs, the relevant metric is not the payout ratio (earnings-based, often misleading due to depreciation on long-lived assets). Instead:
Distribution Coverage Ratio = Distributable Cash Flow / Total Distributions Paid
Anything below 1.0x is a cut warning. 1.1–1.3x is acceptable. 1.5x+ is solid. EPD at 1.7x is near the upper bound for the sector — they retain excess cash for organic growth rather than paying it all out, which is conservative and distribution-protective.
The US became the world's largest LNG exporter in 2023. Capacity is expanding rapidly — Plaquemines LNG (Phase 1, 2025), Golden Pass LNG (2026), Corpus Christi Stage 3 (2025-2026), Port Arthur LNG (2027+). Each new export terminal requires dedicated pipeline feed gas supply contracts, typically 20-year offtake agreements.
Enterprise Products, Boardwalk Pipeline (private, Loews), and Kinder Morgan are the primary beneficiaries for interstate gas transport to Gulf Coast export hubs. The more LNG export capacity that comes online, the more pipeline throughput — and the more fee income for MLPs. This is a structural, multi-decade growth driver uncorrelated with short-term gas prices.
Marco Bozem
Independent Investor & Analyst | Hard Assets, Dividends, Shipping | MB Capital Strategies
Marco has analyzed hard asset and dividend stocks for years with a focus on shipping, mining, and energy infrastructure. All analysis is based on publicly available reports and personal opinion. Not financial advice.
Disclaimer: All content on MB Capital Strategies is for informational purposes only and does not constitute financial advice, investment recommendations, or a solicitation to buy or sell securities. Past performance does not guarantee future results. Investing involves risk including possible loss of principal. Marco Bozem may hold positions in securities mentioned. Always consult a licensed financial advisor before making investment decisions.