2025 Black Stone Minerals (BSM) K-1 Guide: Your Broker's Basis Is Wrong

Black Stone Minerals (BSM) issues a Schedule K-1 โ€” not a 1099. After distributions reduce your basis year after year, your broker's cost basis diverges from what the IRS expects. Here's how to find your real number.

Lucas Andersenโ€” MS Finance; 20 years in asset management and institutional energy trading; builds partnership-taxation tools and basis-reconstruction workpapers.Last updated

Computed per the site methodology ยท Corrections log

Yes. Black Stone Minerals, L.P. (BSM) issues a Schedule K-1 to every unitholder.

What Is Black Stone Minerals?

Black Stone Minerals (BSM) is a publicly traded partnership (PTP) in the energy sector. As a PTP, it issues Schedule K-1s to unitholders instead of 1099-DIVs, which creates unique tax reporting requirements.

Like all MLPs, BSM distributions are not dividends โ€” they're partnership distributions that reduce your cost basis over time. This makes accurate basis tracking essential.

Key Insight

Mineral royalty MLP. Reports depletion, not depreciation. Percentage depletion can exceed basis.

When to Expect Your K-1

2026 tax year (2027 season): not yet announced.

2025 tax year (2026 season): available at taxpackagesupport.com/bsm. This issuer posts its package without an announced date, so this row is kept as current as possible. Source ยท checked September 22, 2026

How to access your BSM K-1:

๐Ÿ“… Your 2025 BSM K-1 is available now โ€” enter this year's numbers before you file.

โ†’ Update your basis in the K-1 Tracker

Why Your Broker's BSM Basis Is Wrong

Your broker tracks your original purchase price for BSM but never sees your K-1. Each year, distributions, income allocations, liability changes, and depreciation deductions adjust your cost basis โ€” and your broker makes none of these adjustments.

After just a few years, the gap between your broker's basis and reality can be thousands of dollars. When you sell, that gap becomes a tax surprise โ€” and the IRS already knows the right number because they receive a copy of every K-1.

Warning

The longer you hold BSM, the wider the gap grows. If you've held for 5+ years, your basis may be 25โ€“50% lower than your broker's number. Don't discover this in the year you sell.

Calculate Your BSM Basis

Enter data from your BSM K-1 to calculate your adjusted basis for one year. Run this for each year you've held BSM to see cumulative erosion.

Black Stone Minerals Quick Basis Calculator

Enter your K-1 data to calculate your adjusted basis using the IRS worksheet

Track your BSM basis

The K-1 Basis Tracker implements the full IRS Partner's Basis Worksheet for BSM. Enter your K-1 data and see the real gap between your broker's number and your IRS-adjusted basis.

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 Tracker

๐Ÿ“ฌ Get notified when next year's BSM K-1 drops โ€” plus annual filing reminders.

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Key Tax Considerations

When you sell BSM units, a portion of your gain may be recharacterized as ordinary income under IRC ยง751 โ€” taxed at up to 37%, not the capital gains rate. The more physical infrastructure the MLP owns, the larger your ยง751 exposure grows each year.

BSM also operates across multiple states, which may create nonresident filing obligations. Review your K-1 state schedule for allocations above each state's filing threshold.

Key Takeaways for BSM Investors

  • 1.BSM is a PTP โ€” you get a K-1, not a 1099-DIV
  • 2.Your broker's cost basis is wrong after the first year of K-1 adjustments
  • 3.Distributions reduce your basis โ€” they're not immediately taxable
  • 4.Track your basis each year to avoid a tax surprise when you sell
  • 5.Check the release-date section for the current season and don't file before your K-1 arrives

Frequently Asked Questions

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, ยง751 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.

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