MLP distributions look like dividends in your brokerage account. They're not. The tax treatment is completely different — and misunderstanding it is the most expensive mistake MLP investors make.
By Lucas Andersen — Last updated February 22, 2026
If you own MLP units, your brokerage shows periodic cash payments that look identical to stock dividends. But the tax treatment is fundamentally different. Dividends come from C-corporations and are reported on Form 1099-DIV. MLP distributions come from partnerships and are reported on Schedule K-1. Most of the distribution is return of capital — it reduces your cost basis instead of being taxed immediately.
The cash you receive and the income you owe taxes on are two separate numbers. MLPs own billions in physical infrastructure — pipelines, processing plants, storage terminals. Depreciation deductions push K-1 taxable income well below the cash distributed. You might receive $3.50/unit in distributions while your K-1 allocates only $0.50/unit in taxable income, or even a net loss.
When distributions exceed allocated taxable income, the excess is return of capital (ROC). ROC is not taxed when received — it reduces your cost basis dollar-for-dollar under IRC §733. Example: $3,000 distribution with $800 K-1 income = $2,200 ROC, reducing a $10,000 basis to $7,800. Tax-deferred, not tax-free — you pay when you sell.
DCR = Distributable Cash Flow ÷ Total Distributions Paid. Above 1.3x is strong. 1.0–1.3x is adequate but thin. Below 1.0x is unsustainable. Paradoxically, MLPs with the strongest coverage ratios often cause the fastest basis erosion because higher depreciation deductions create more return of capital.
500 units at $20 = $10,000 basis. Year 1 K-1: Box 1 = ($200) loss, Box 19A = $1,400 distributions, liability increase = $100. Starting basis $10,000 + $100 liability − $1,400 distributions = $8,700 ending basis. Tax owed this year: $0. But when you sell, the $1,300 basis reduction creates $1,300 more taxable gain.
Under IRC §731, basis cannot go below zero. When it reaches zero, any further distributions exceeding allocated income are taxed immediately as capital gains. The tax-deferral benefit is gone. For high-yield MLPs (8–10%), this can happen after 10–15 years.
Each DRIP reinvestment creates a new tax lot with its own purchase date and cost basis. After 5 years, you may have 20+ lots. Each lot needs its own basis tracking and holding period calculation. DRIPs don’t avoid basis reduction on the original lot. The original lot’s basis still erodes from return of capital while DRIP-purchased units start their own cycle.