Your Enterprise Products Partners K-1 replaces the 1099-DIV and 1099-B you’d get from an ordinary stock, and it reports your share of the partnership’s income, deductions, credits, and distributions for the year. The numbers on it feed your Form 1040, adjust the basis you track yourself, and can create filing obligations in states you’ve never visited. Once you know which box goes to which form, the paperwork is manageable.
What the Form Is and When It Arrives
Enterprise Products Partners (EPD) is a master limited partnership, so it does not pay federal income tax at the entity level. It files Form 1065 and passes each unitholder’s share of the results through on a Schedule K-1. For tax purposes, you’re treated as directly participating in the partnership’s business even though you bought units on the exchange like any other security.
EPD announced that its 2025 tax packages were available online beginning March 3, 2026. That’s earlier than many MLPs but still later than the January window when 1099s arrive, and it catches investors who start their returns early. If the K-1 hasn’t come by the time you’d normally file, request an automatic six-month extension using Form 4868, which pushes your filing deadline to October 15. The extension covers filing only. Any tax you owe is still due by April 15, or interest and penalties run on the unpaid balance.
Adjusted Basis: The Number You Track Yourself
Your adjusted basis in EPD units is the most important figure in MLP taxation, and nobody keeps it for you. It starts as what you paid for the units, including transaction costs, and it changes every year based on your K-1.
Under the federal tax code, basis increases by your share of the partnership’s taxable income and any tax-exempt income it earned. It decreases by your share of losses, non-deductible expenses, and distributions received. The statute says basis cannot be reduced below zero through these adjustments.
For most EPD holders, quarterly cash distributions are largely classified as return of capital rather than taxable dividends, and they steadily chip away at basis over time. You don’t owe tax on those distributions when you receive them. But when you eventually sell, every dollar of basis reduction translates into a dollar of additional gain. If basis hits zero and distributions keep coming, those additional distributions become taxable as capital gains immediately.
Keep a running worksheet that logs each year’s K-1 adjustments. You’ll need the full history when you sell, because your broker’s records won’t reflect any K-1 adjustments and will almost certainly show the wrong cost basis on your 1099-B.
Reading Part III Box by Box
The K-1 has three parts. Part I identifies the partnership, Part II identifies you, and Part III is where the numbers live. Each box in Part III feeds a specific line or form on your personal return.
Box 1: Ordinary Business Income or Loss
Box 1 reports your share of EPD’s ordinary business income or loss from its core operations. It goes on Schedule E of your Form 1040, but it’s subject to the passive activity rules described below. If Box 1 shows a loss, run it through Form 8582 to determine how much you can actually deduct this year.
Box 2: Net Rental Real Estate Income or Loss
If the partnership holds rental real estate, your share of that income or loss appears here. Like Box 1, it’s passive income or loss reported on Schedule E and subject to Form 8582 limits.
Box 19: Distributions
Box 19, Code A reports the total cash and marketable securities distributed to you during the year. It’s the number most investors care about, but it does not go anywhere on your Form 1040. Its job is to reduce your adjusted basis. Because EPD distributions are largely return of capital, the Box 19 amount often exceeds the taxable income in Box 1, which is why your basis declines over time.
Box 20: Other Information
Box 20 carries a long list of coded items. Several matter for EPD unitholders:
- Code V reports your share of unrelated business taxable income (UBTI), which matters if you hold EPD in a tax-exempt account like an IRA.
- Code Y reports net investment income figures relevant to the 3.8% Net Investment Income Tax.
- Code Z contains the Section 199A information you need to calculate the qualified business income deduction on Form 8995.
- Code AB reports your share of Section 751 ordinary gain or loss if you sold units during the year.
EPD’s K-1 package includes supplemental schedules that break these codes down further, with instructions on where each amount gets reported. Read them closely. Box 20 entries often can’t be reported correctly without them.
Passive Activity Rules and the PTP Basket
Income and losses from EPD are passive because you don’t materially participate in running a pipeline company. The rule that trips up investors applies specifically to publicly traded partnerships.
Under the federal tax code, passive activity rules apply separately to each publicly traded partnership. A passive loss from EPD can only be deducted against passive income from EPD. You cannot use EPD losses to offset rental income, wages, or even passive income from a different MLP. Each PTP sits in its own isolated bucket.
If EPD generates a net passive loss in a given year and you have no EPD passive income to absorb it, the loss is suspended and carries forward. It stays frozen until either EPD generates enough passive income in a future year to absorb it, or you sell your entire EPD position in a taxable transaction. At that point, all accumulated suspended losses are released and become deductible against any type of income. This is reported on Form 8582.
The Qualified Business Income Deduction
Section 199A allows a deduction of up to 20 percent of qualified income from publicly traded partnerships. PTP income is calculated as a separate component from other QBI, and unlike QBI from a regular pass-through business, the PTP component is not limited by W-2 wages or the value of the partnership’s qualified property. The figures come from Box 20, Code Z on your K-1, and the deduction is reported on Form 8995 (or Form 8995-A for higher-income filers).
For taxpayers above certain income thresholds, the amount of PTP income that qualifies may be limited depending on whether the partnership’s trade or business is a specified service trade or business. EPD operates midstream energy infrastructure, which is not a specified service activity, so this limitation generally does not apply. The overall deduction cannot exceed 20 percent of your taxable income minus net capital gains.
Net Investment Income Tax
Passive income from a publicly traded partnership counts as net investment income subject to the 3.8 percent Net Investment Income Tax. You owe this surtax on the lesser of your net investment income or the amount by which your modified adjusted gross income exceeds the applicable threshold: $200,000 for single filers, $250,000 for married filing jointly, or $125,000 for married filing separately. These thresholds are statutory and have never been adjusted for inflation, so more taxpayers cross them each year.
Gains on the sale of EPD units, including the Section 751 ordinary income component described below, are also included in the NIIT calculation. The tax is computed on Form 8960. Box 20, Code Y provides the net investment income figure allocated to you.
If You Hold EPD in an IRA or Other Tax-Exempt Account
MLP operations are treated as an active trade or business, so income generated inside a tax-exempt account is classified as unrelated business taxable income. The tax code allows a $1,000 specific deduction against UBTI. If UBTI exceeds that amount, the tax-exempt entity must file Form 990-T and pay tax on the excess at trust tax rates, which compress into the top bracket quickly. Your IRA custodian may handle the Form 990-T filing, but the tax is paid from the IRA’s assets, reducing your retirement balance. Box 20, Code V shows the UBTI amount allocated to you.
State Tax Filing Obligations
EPD operates pipeline and processing infrastructure across many states, and because you’re treated as directly engaged in the partnership’s business, you may owe non-resident returns in each state where EPD earned income. The K-1 package includes a supplemental state allocation schedule showing your share of income or loss in each state.
Some states set minimum income thresholds below which non-residents don’t need to file, and those thresholds vary widely. Others require filing even if your allocated income is a few dollars. The filing obligation exists regardless of whether you owe any tax, and states can assess penalties and interest for failure to file. Your home state generally provides a credit for taxes paid to other states on the same income, so you’re not double-taxed on the dollars themselves, but the credit doesn’t reimburse you for preparing multiple returns.
Tax Treatment When You Sell
Selling EPD units is not like selling regular stock. The disposition splits between capital gain or loss and ordinary income, requires multiple IRS forms, and depends on the cumulative basis you’ve tracked across every K-1 you’ve received.
Calculating Your Final Basis
Your final adjusted basis is your original purchase price, increased by all years of allocated income and decreased by all years of losses and distributions. Ten years of holding means ten years of K-1 data. The cost basis your broker reports on Form 1099-B will almost certainly be wrong, because brokers do not incorporate K-1 adjustments. You have to override it.
The Section 751 Ordinary Income Component
A portion of your gain is recharacterized as ordinary income under Section 751 of the tax code. This component stems primarily from the partnership’s unrealized receivables and inventory items, which in practical terms captures the cumulative depreciation and other deductions that reduced your basis over the years. Section 751 ordinary income is recognized in full even if you have an overall loss on the sale. It is not capped at your total gain.
The partnership or your broker will provide a statement, often attached to the final K-1, breaking out the Section 751 ordinary income amount. Box 20, Code AB reports this figure. The ordinary income goes on Form 4797 (Sales of Business Property) and is taxed at your marginal ordinary income rate. The remaining capital gain or loss goes on Form 8949 and then Schedule D. It is entirely possible to owe ordinary income tax on the Section 751 amount while simultaneously reporting a capital loss on the same sale.
Reporting the Sale
On Form 8949, enter the sale price from your 1099-B and your manually calculated adjusted basis. If the broker-reported basis is wrong, enter the broker’s figure in the cost basis column and use the adjustment column to correct it. The total from Form 8949 carries to Schedule D. Separately, report the Section 751 ordinary income on Form 4797. The final K-1 for the year of sale contains both figures along with supplemental instructions.