Key Takeaways
- MLPs are publicly traded partnerships, primarily in energy infrastructure
- Distributions are largely tax-deferred return of capital, not ordinary dividends
- MLPs issue K-1 tax forms, adding complexity to tax filing
- Many MLPs have converted to C-corps, simplifying tax treatment
Master Limited Partnerships (MLPs) are publicly traded partnerships that typically operate energy infrastructure assets — pipelines, storage terminals, and processing plants. They pay distributions (not technically dividends) that are largely treated as return of capital for tax purposes, creating a tax-deferred income stream.
How MLP Distributions Work
Unlike corporations, MLPs pass through income directly to unitholders (partners) without corporate-level taxation. Distributions typically consist of 70-90% return of capital, which reduces your cost basis rather than creating immediate taxable income. You only pay taxes when you sell your units. This makes MLPs one of the most tax-efficient income vehicles — but the trade-off is complexity.
The K-1 Problem
MLPs issue Schedule K-1 tax forms instead of 1099-DIVs. K-1s are more complex, often arrive late (sometimes not until April), and require additional tax preparation. Holding MLPs in IRAs can also trigger UBTI (Unrelated Business Taxable Income) if distributions exceed $1,000, potentially creating a tax liability within the IRA itself.
The Shift to C-Corps
Due to K-1 complexity, many former MLPs have converted to C-corporations. Kinder Morgan, ONEOK, and Williams Companies all made this transition. C-corp energy companies pay regular dividends with standard 1099-DIV reporting and no UBTI risk. For most investors, these converted entities offer similar exposure with far less tax hassle. For more on energy income, see our energy dividend guide.
Frequently Asked Questions
Are MLP distributions taxable?
Partially. The return-of-capital portion reduces your cost basis and is not taxed until you sell. The remainder may be taxed as ordinary income. Consult a tax professional for your specific situation.
Can I hold MLPs in an IRA?
You can, but UBTI above $1,000 can trigger taxes even within an IRA. MLP ETFs (like AMLP) avoid this issue by wrapping MLPs in a C-corp structure, though they have their own tax drag.
Why are MLPs declining?
Many MLPs have converted to C-corps for simpler tax treatment and broader investor appeal. The MLP structure is less popular than it was a decade ago, though some high-quality pipeline MLPs remain.