Most of the cash a Master Limited Partnership pays you isn’t taxed in the year you receive it, but that doesn’t mean the money is tax-free. MLP payouts are taxed as a mix of tax-deferred return of capital, a small slice of currently taxable partnership income, and eventually a larger bill when you sell your units. Because MLPs are partnerships rather than corporations, the cash flows straight to you without any entity-level federal tax, and the depreciation deductions inside the business usually push most of each quarterly payout into the return-of-capital category. The tradeoff is a shrinking cost basis, annual Schedule K-1 reporting, and a sale that often produces more ordinary income than investors expect.
Why the Cash Isn’t a Dividend
Corporate dividends come out of profits that have already been taxed at the corporate level. An MLP distribution does not. MLPs pass income, deductions, and credits directly through to their unit holders, which is why what you receive each quarter is labeled “Available Cash Flow” rather than a dividend.
Available cash flow typically runs well above the MLP’s reported taxable income. Pipelines, tank farms, and processing facilities carry heavy depreciation deductions that reduce taxable income on paper without reducing the cash the business actually produces. That gap between cash and taxable income is the whole reason most of your distribution escapes current tax.
Return of Capital and Your Shrinking Basis
The portion of your distribution that exceeds your allocated share of the MLP’s taxable income is classified as a return of capital. It isn’t income. The tax code treats it as the partnership handing back part of your original investment, so you owe nothing on it the year you receive it.
Each dollar of return of capital reduces your adjusted cost basis in the units. Buy units for $50, collect $5 of return of capital in year one, and your basis drops to $45. You keep the $5 tax-free, but when you eventually sell, your gain will be measured from $45 rather than $50. The tax didn’t disappear. It moved.
This continues as long as your basis stays above zero. Once basis hits zero, any further return-of-capital distributions become taxable as capital gains in the year you receive them, and the deferral advantage ends for new payouts. After a decade or more of holding, a zero basis is common.
Basis also moves with the other items on your annual K-1: it goes up for your share of partnership income and down for allocated losses and deductions. Those downward depreciation adjustments are what make return of capital dominate most distributions. Every K-1 you receive changes the calculation, so keep every one of them for as long as you own the units.
The 20% Section 199A Deduction
The taxable slice of your MLP income may qualify for a 20% deduction under Section 199A. The provision came in with the 2017 Tax Cuts and Jobs Act and was made permanent by the One Big Beautiful Bill Act, letting eligible taxpayers deduct up to 20% of qualified publicly traded partnership income.1Internal Revenue Service. Qualified Business Income Deduction The PTP income component is treated separately from ordinary qualified business income, and it isn’t limited by W-2 wages or the partnership’s depreciable property.
If your K-1 shows $1,000 of taxable income from the MLP, you may deduct up to $200, cutting your effective tax on that income by a fifth. Starting in 2026, taxpayers with at least $1,000 in total qualified business income from active qualified trades or businesses can claim a minimum deduction of $400, with both figures indexed for inflation.
Schedule K-1 Reporting and Why You’ll File an Extension
MLP investors receive a Schedule K-1 (Form 1065) instead of the Form 1099-DIV that stockholders get.2Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065) (2025) The K-1 reports your proportional share of partnership income, deductions, credits, and distributions. Box 1 shows ordinary business income or loss, and supplemental statements give you the total cash distributions and the return-of-capital amount for your basis calculation.
K-1s are notoriously late. The deadline is March 15, and many MLPs push against it or issue corrected versions afterward. If you hold even one MLP in a taxable brokerage account, plan on filing a tax extension. The forms are dense, feeding into Schedule E, Form 8949, and sometimes additional state returns, and most MLP investors end up paying for professional tax preparation. That annual cost is worth factoring into your expected return before you buy.
Losses Are Trapped Inside Each MLP
Income and losses from an MLP are passive, and the passive activity rules are applied separately to each publicly traded partnership you own.3Office of the Law Revision Counsel. 26 U.S. Code 469 – Passive Activity Losses and Credits Limited A loss from one MLP can’t offset income from another MLP, and MLP losses can’t offset your wages, interest, or portfolio gains. Each MLP sits in its own bucket.
When a K-1 shows a net loss, that loss is suspended. It carries forward indefinitely but only against future passive income from the same MLP. The suspended losses are released and become fully deductible when you sell your entire interest in that MLP in a fully taxable transaction to an unrelated buyer.4Internal Revenue Service. Instructions for Form 8582 (2025) At that point they can offset the gain on sale or even produce a net loss. That release is one of the few things that softens the tax hit at exit.
State Returns and the 3.8% Surtax
If an MLP operates pipelines through eight states, you may owe a nonresident income tax return in each state that taxes personal income and allocates partnership earnings to its jurisdiction. The K-1 supplemental schedules give you a state-by-state income breakdown so you can see where the partnership earned money.
Many of those allocations are small enough to fall below a state’s filing threshold, but a significant number of states set that threshold effectively at zero, meaning any income triggers a return. Even where the resulting tax is small, you may still need to file to demonstrate that. Checking the MLP’s geographic footprint before you invest is worth the few minutes it takes.
On top of state tax, investors whose modified adjusted gross income exceeds $200,000 (single) or $250,000 (married filing jointly) may owe the 3.8% net investment income tax on their MLP income.5Internal Revenue Service. Questions and Answers on the Net Investment Income Tax Return of capital isn’t subject to the surtax, since it isn’t income. Your allocated share of MLP earnings and any gain on sale are. For a top-bracket investor, that pushes the ceiling on ordinary-income recapture at sale to a combined 40.8%.
MLPs Inside an IRA Don’t Escape Tax
Holding MLPs in an IRA or Roth IRA does not make the tax issues go away. When a tax-exempt account earns income from an active trade or business, it’s classified as unrelated business taxable income, reported on the K-1 in Box 20, Code V.2Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065) (2025) If total UBTI across the investments in a single retirement account reaches $1,000 of gross income, the custodian must file Form 990-T and pay the resulting tax out of the account’s assets.6Internal Revenue Service. Instructions for Form 990-T (2025) Each retirement account is treated as its own entity for this purpose.7Internal Revenue Service. Unrelated Business Income Tax
Some custodians handle the filing automatically; others expect the account holder to monitor it. The MLP’s built-in tax deferral is largely wasted inside a tax-deferred account anyway, and the UBTI exposure can actually trigger tax inside a wrapper the account was designed to avoid.
What Happens When You Sell
Selling MLP units is where the accumulated deferral comes due, and the bill is often larger than investors expect. Gain or loss starts from your final adjusted basis, which reflects every return-of-capital distribution, income allocation, and depreciation deduction from every year you held. After years of basis reductions, even a flat unit price can produce a substantial taxable gain.
Ordinary Income Recapture
Not all of that gain gets capital gains rates. The portion attributable to “hot assets” inside the partnership is recharacterized as ordinary income.8Office of the Law Revision Counsel. 26 USC 751 – Unrealized Receivables and Inventory Items For most energy MLPs the hot assets are Section 1245 property (pipelines, compressors, processing equipment) and Section 1250 property (buildings and structural improvements), to the extent cumulative depreciation has reduced their basis below sale value.
Depreciation recapture on Section 1245 property is taxed at your ordinary rate, which can reach 37% for 2026.9Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Recapture on the Section 1250 real property portion is capped at 25% as unrecaptured Section 1250 gain.10eCFR. 26 CFR 1.453-12 – Allocation of Unrecaptured Section 1250 Gain The MLP provides a supplemental schedule with your final K-1 that splits ordinary recapture from capital gain, so you don’t have to build the calculation from scratch.
The Capital Gain Portion
What’s left after the recapture carve-outs is long-term capital gain, as long as you held the units more than one year.11Office of the Law Revision Counsel. 26 USC 1222 – Other Terms Relating to Capital Gains and Losses For 2026, long-term capital gains rates are 0%, 15%, or 20% depending on taxable income. For single filers, the 0% band runs through $49,450, the 15% band through $545,500, and 20% applies above that.
The math can produce odd outcomes. An investor who sells at the original purchase price can still owe meaningful ordinary income tax because the reduced basis turns the whole gain into recapture. In extreme cases you can have a capital loss on the sale while simultaneously owing ordinary tax on recaptured depreciation. The deferral you enjoyed year after year gets paid back, often at a higher rate than you would have paid along the way.
Reporting the Sale
The transaction goes on Form 8949 and Schedule D, built from your final K-1 and its supplemental schedules.12Internal Revenue Service. Instructions for Form 8949 (2025) Your brokerage Form 1099-B will show only your original purchase price, not your adjusted basis or the ordinary-income split. The 1099-B alone is not enough to calculate what you owe. The final K-1 may not arrive until well into tax season, which makes an extension nearly unavoidable in the year of sale.
Any suspended passive losses from that MLP are released on a complete disposition to an unrelated buyer in a fully taxable transaction, and they can offset the gain.4Internal Revenue Service. Instructions for Form 8582 (2025) Careful recordkeeping across the years directly reduces the tax at exit.
Step-Up in Basis at Death
If MLP units pass to an heir, the heir receives a stepped-up basis equal to the fair market value on the date of death.13Office of the Law Revision Counsel. 26 U.S. Code 1014 – Basis of Property Acquired from a Decedent That wipes out every basis reduction from years of return-of-capital distributions. The depreciation recapture that would have been taxed as ordinary income on a lifetime sale effectively disappears. For long-term holders sitting near zero basis, the step-up is the largest planning lever in the whole structure, and it is the reason some advisors suggest holding MLPs through death rather than selling late in life.