The #1 Misconception: Distributions Are Not Dividends
If you own MLP units, your brokerage account shows periodic cash payments that look identical to stock dividends. Same column, same frequency, same dollar amount hitting your account every quarter. But the tax treatment is fundamentally different.
Dividends come from C-corporations. They're reported on Form 1099-DIV, taxed at qualified dividend rates (0–20%), and have no effect on your cost basis. You receive the cash, you pay the tax, the transaction is complete.
MLP distributions come from partnerships. They're reported on Schedule K-1 — a completely different tax form that your broker doesn't generate and often doesn't understand. The distribution is not "income" in the way a dividend is. Instead, most of it is a return of your own invested capital, which reduces your cost basis and defers taxation until you sell.
Warning
This matters at tax time. If you treat MLP distributions like dividends — reporting them as income in the year received — you'll pay tax twice: once when you receive the distribution, and again when you sell (because the basis reduction still applies regardless of how you reported it). Conversely, if you ignore the K-1 entirely, you'll underreport gain when you sell.
Cash Distributions vs. Taxable Income
The most counterintuitive fact about MLP investing: the cash you receive and the income you owe taxes on are two separate numbers.
Every year, your MLP allocates taxable income (or loss) to you on the K-1. This is your share of the partnership's net income after deducting operating expenses, depreciation, and other items. Separately, the MLP sends you quarterly cash distributions — a completely different amount based on the partnership's cash flow policy.
Why they diverge:
- Depreciation shelters income: MLPs own billions in physical infrastructure — pipelines, processing plants, storage terminals. Depreciation deductions against this asset base often push K-1 taxable income well below the cash distributed.
- Cash flow ≠ accounting income: Depreciation is a non-cash charge. The MLP generates real cash flow from operations while reporting minimal (or negative) taxable income.
- The result: You might receive $3.50/unit in cash distributions while your K-1 allocates only $0.50/unit in taxable income — or even a net loss.
Key Insight
This disconnect is the core reason MLPs are popular with income investors. You receive cash payments similar to a 7–10% dividend yield, but most of that cash isn't currently taxable. The catch: it reduces your basis, creating a larger taxable gain when you eventually sell.
Return of Capital: The Tax-Deferral Mechanism
When your MLP distributes more cash than it allocates in taxable income, the excess is classified as return of capital (ROC). Return of capital is not taxed when received. Instead, it reduces your cost basis dollar-for-dollar under IRC §733.
Simple example:
That $2,200 ROC reduces your basis by $2,200. If your starting basis was $10,000, your ending basis after this year is $7,800. The $2,200 wasn't "free" money — it was an advance on your eventual sale proceeds.
Tax-deferred, not tax-free. When you sell your MLP units, your taxable gain is the amount realized, which is the cash plus your share of partnership liabilities that the buyer takes over (Schedule K-1 Item K; IRC §752(d); Reg. §1.1001-2(a)(4)(v)), minus your adjusted basis. Every dollar of ROC that reduced your basis adds a dollar to your eventual taxable gain. The tax wasn't eliminated — it was pushed forward in time.
Key Insight
The deferral is still valuable. Deferring taxes for 5–10 years means you keep that capital invested and compounding. At a 7% annual return, $2,200 deferred for 10 years generates roughly $2,100 in additional growth before tax is due.
Distribution Coverage Ratio
The distribution coverage ratio (DCR) measures how much cash an MLP generates relative to what it pays out in distributions.
DCR = Distributable Cash Flow ÷ Total Distributions Paid
Above 1.3x
Strong coverage. The MLP retains excess cash for growth, debt reduction, or distribution increases. Most well-run midstream MLPs target this range.
1.0x – 1.3x
Adequate but thin. The distribution is sustainable for now, but there's limited margin for error if volumes decline or maintenance costs spike.
Below 1.0x
The MLP is paying out more than it earns. This is unsustainable and often precedes a distribution cut — which typically causes a 20–40% unit price decline.
Why DCR matters for basis tracking: A high DCR means the MLP is generating substantial excess cash, which typically translates to higher depreciation deductions on the K-1. Higher depreciation = lower allocated income = more return of capital = faster basis erosion. Paradoxically, the "safest" MLPs from a distribution sustainability standpoint often cause the fastest basis decline.
Current Year vs. Deferred Tax — Worked Example
Worked Example: 500 Units at $20/unit
Purchase: 500 units at $20.00 = $10,000 total cost basis
Year 1 K-1 data:
Basis calculation:
*The Box 1 loss reduces your outside basis under §705(a)(2). However, the loss is suspended under §469(k) PTP passive activity rules — you cannot deduct it against wages, investment income, or even other PTP income. It can only offset future income from this same PTP, or be released when you sell your entire interest.
Tax owed this year: $0. The K-1 loss is suspended for deduction purposes, and distributions are return of capital (not taxable income).
Tax deferred: When you sell, your basis is $8,500 instead of $10,000. That $1,500 reduction means $1,500 more in taxable gain at disposition.
Multiply this across 5–10 years and the gap between your broker's basis (still $10,000) and your real IRS basis ($6,000–$7,000) becomes substantial. This is why your broker's cost basis is wrong — they never see the K-1 and never adjust for these annual changes.
Calculate your real basis
The K-1 Basis Tracker implements the full IRS Partner's Basis Worksheet. Enter your K-1 data and see the gap between broker basis and reality.
In the K-1 tracker, typing your numbers in uploads nothing; an uploaded K-1 PDF is read by a third-party AI provider. Privacy
Open K-1 Basis TrackerWhat Happens When Basis Reaches Zero
Every year of return of capital pushes your basis lower. For a high-yield MLP paying 8–10% with modest income allocations, basis can approach zero after roughly 10–15 years of holding.
Under IRC §731, your basis cannot go below zero. When it reaches zero, any further distributions that exceed allocated income are taxed immediately as capital gains in the year received. The tax-deferral benefit is gone.
The before-and-after:
While basis > $0
- Distributions reduce basis
- No current tax on ROC portion
- Tax is deferred until sale
When basis = $0
- Distributions trigger §731 gain
- Taxed as capital gains when received
- No further deferral available
Warning
This catches long-term holders off guard. You've held an MLP for 12 years with no tax issues. Suddenly, your quarterly distribution triggers a taxable event you weren't expecting. If you're not tracking basis year over year, you won't know when this threshold is approaching. Check your current basis using the basis erosion guide to estimate how many years of deferral you have left.
DRIPs: Reinvested Distributions Create New Tax Lots
Many MLP investors enroll in Distribution Reinvestment Plans (DRIPs), which automatically use cash distributions to purchase additional units. While this is a sound investment strategy for compounding, it creates significant tracking complexity.
- Each DRIP creates a new tax lot: Every quarter's reinvested distribution purchases units at that day's market price. After 5 years, you may have 20+ separate lots, each with its own cost basis and purchase date.
- Each lot needs its own basis tracking: The K-1 basis adjustment applies proportionally across all lots you held during the year. When you sell, each lot has a different adjusted basis and holding period.
- DRIPs don't avoid basis reduction: The original lot's basis still erodes from return of capital. The DRIP-purchased units are new lots that start their own basis erosion cycle.
- Holding period matters: DRIP lots purchased within the last 12 months are short-term. This affects the tax rate on gains from those specific lots when sold.
Key Insight
Practical tip: If you use DRIPs with MLPs, keep a spreadsheet of every reinvestment date, unit count, and price. You'll need this when you sell — and your broker's records alone won't have the correct adjusted basis for any of these lots.
Frequently Asked Questions
No. Dividends come from C-corporations and are reported on Form 1099-DIV. MLP distributions come from partnerships and are reported on Schedule K-1. Dividends are taxed when received (qualified or ordinary). MLP distributions are mostly return of capital — they reduce your basis instead of being taxed immediately.
Usually not in full. The portion of distributions that exceeds your allocated K-1 income is return of capital, which reduces your basis instead of creating a current tax liability. Most midstream MLPs distribute more cash than they allocate in taxable income, so the majority of distributions are tax-deferred.
Return of capital (ROC) is the portion of an MLP distribution that exceeds your allocated taxable income for the year. It is not taxed when received. Instead, it reduces your cost basis dollar-for-dollar. When you eventually sell your units, the lower basis creates a larger taxable gain — meaning ROC is tax-deferred, not tax-free.
Under IRC §731, when your basis reaches zero, any further distributions are taxed immediately as capital gains in the year received. The tax deferral benefit ends completely. This can happen after 8–12+ years of holding high-yield MLPs, depending on the distribution-to-income ratio.
The distribution coverage ratio (DCR) measures how much distributable cash flow an MLP generates relative to what it pays out. A DCR of 1.5x means the MLP earns $1.50 for every $1.00 distributed. Above 1.0x is sustainable. Most stable midstream MLPs target 1.3–1.6x coverage. Below 1.0x means the MLP is paying out more than it earns — a warning sign for potential distribution cuts.
DRIPs (distribution reinvestment plans) do not create additional taxable events beyond the normal distribution treatment. However, each reinvested distribution creates a new tax lot with its own purchase date and cost basis. Over several years, this can mean dozens of separate lots — each requiring individual basis tracking and its own holding period calculation when sold.
Because MLPs do not pay dividends. They are partnerships, not corporations. Your broker may show the MLP in your holdings, but income and distributions are reported exclusively on Schedule K-1, which comes directly from the partnership — not from your broker. The K-1 typically arrives in March, well after your 1099.
Disclaimer: This content is for educational and informational purposes only. It does not constitute tax, legal, or financial advice. MLP taxation involves complex rules including basis tracking, §751 recapture, passive activity limitations, and multi-state filing. Consult a qualified tax professional before making tax or investment decisions.
Lucas Andersen is not a CPA, Enrolled Agent, or tax attorney. Information reflects rules as of the date published and may change. Always verify with current IRS guidance.