2025 PAA K-1 Guide: Distribution Changes Make Flat-Rate Estimates Wrong

This is the most important question in the entire guide, and it's the one most Plains investors can't answer confidently. PAA and PAGP are different securities with completely different tax reporting.

If you hold PAGP (not PAA), there's a forward-looking tax change you should know about. Due to Plains' pending NGL assets sale, PAGP expects to report positive current earnings and profits for tax year 2026. This means part of its Class A Share distribution will be taxable as a dividend — not return of capital.

Plains will publish Form 8937 after the transaction closes. If you've been holding PAGP assuming pure ROC treatment on distributions, your 2026 1099-DIV will look different. This is a 2026 tax event (not 2025), but knowing now lets you plan for potential taxable dividend income next year.

PAA's early release date means you may have your PAA K-1 weeks before other MLPs arrive. Don't file until all K-1s are in — but you can start entering PAA data early to get ahead.

PAA's distribution history is the most instructive cautionary tale in the MLP space. It demonstrates why you cannot estimate your basis from a simple "years held × current distribution" calculation.

What this means for your basis: If you held PAA through the 2020 cut, your basis erosion was minimal during 2020–2021, then accelerated as distributions recovered. A holder since 2019 has a completely different erosion pattern than someone who bought in 2023. Each year's K-1 is the only authoritative source — you need all of them.

Here's what basis erosion looks like for a PAA position held through the distribution cut and recovery. ROC is historically 80–95% of distributions — verify against your actual K-1.

Enter data from your PAA K-1 to calculate your adjusted basis for one year. Run this for each year you've held PAA — especially if you held through the 2020 distribution cut.

PAA owns $8B+ in depreciable pipeline, terminal, and crude oil storage assets. Depreciation passed through on your K-1 accumulates as §751 "hot asset" recapture. When you sell, this accumulated depreciation is recharacterized as ordinary income taxed at up to 37% — not capital gains rates.

For positions held 5+ years, §751 commonly represents 30–50% of your total gain. The exact amount appears on the Sales Schedule in your final K-1 package — you won't know the precise figure until after the year of sale.

See the full mechanics in our §751 deep dive.

PAA operates crude oil pipelines, terminals, and storage across the US and Canada.

Because PAA is heavily weighted toward Texas, most small unitholders have fewer state filing obligations than with Colorado- or Louisiana-heavy MLPs. See the MLP State Filing Requirements guide for the full breakdown.

• Not knowing whether you hold PAA or PAGP: This is the #1 mistake. PAA requires K-1 basis tracking. PAGP does not. Check your brokerage statement for the exact ticker before doing anything else.
• Using a flat rate to estimate basis erosion: PAA's distribution rate changed four times in five years. Multiplying the current $1.67/year rate by years held gives the wrong number. You need each year's actual K-1 data. → Enter your real PAA K-1 data
• Assuming the distribution cut "helped" your tax situation: Lower distributions slowed erosion, but didn't reverse it. If your K-1 showed positive Box 1 income during the cut years, your basis could have declined even during low distribution periods.
• Not understanding §751 recapture at sale: PAA's depreciable assets create ordinary income recapture when you sell. Read the §751 recapture guide before selling.
• Thinking PAA trades on the NYSE: Both PAA and PAGP trade on Nasdaq, not NYSE. This matters when looking up quotes and confirming your holding.
• Ignoring the Canadian operations: PAA's Canadian operations may create foreign income allocations on your K-1. Depending on the amounts, this could affect foreign tax credit calculations. See MLP State Filing Requirements.