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Legal · IRS Rulings · Procedures · Tax Court Opinions

Internal Revenue Bulletins

Corpus-backed assistant for authoritative interpretive tax guidance. Live coverage: every Internal Revenue Bulletin published since 1996 (~1,600 IRBs containing Revenue Rulings, Revenue Procedures, Notices, Announcements, Treasury Decisions) + United States Tax Court opinions from 2020 through present (~1,400 Regular, Memorandum, and Summary opinions). Sourced from irs.gov and ustaxcourt.gov, streaming updates as new IRBs and opinions are published. For statutory text (IRC) and Treasury Regulations, see theirsai.com. Pre-2020 Tax Court archive (1995-2019) trickling in over the coming days.

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About this reference portal

Internal Revenue Bulletins is a chronological reference for the weekly IRB (Internal Revenue Bulletin) publications — the official source of Revenue Rulings, Revenue Procedures, Notices, Announcements, and Treasury Decisions. This is where the Service publishes its current position on ambiguous points of tax law.

Who reads this: Tax professionals researching the Service's position on a specific issue, corporate tax departments tracking guidance affecting their positions, and taxpayers wanting to see whether a Private Letter Ruling or Chief Counsel Advice reflects broader Service policy.

Coverage & Subject Areas

The subjects this portal indexes, reference-guides, and routes visitors through. Each topic links to deeper answers in the research console at internalrevenuebulletins.com.

Revenue Rulings Official published interpretations by the IRS on specific fact patterns. Binding on the Service until modified, obsoleted, or revoked. Cite as 'Rev. Rul. 2024-XX' or by IRB volume/page.
Revenue Procedures Official statements of procedure that affect taxpayer rights or duties — e.g., the annual mileage-rate Rev. Proc., inflation-adjusted amounts, procedures for automatic accounting-method changes.
Notices Interim guidance, often issued when regulations are being drafted or when an administrative position needs to be communicated quickly (transition relief, penalty waivers, effective-date clarifications).
Announcements Public statements of general interest, often correcting or clarifying earlier guidance without substantive policy change.
Treasury Decisions (TDs) Final and temporary Treasury regulations published in the Federal Register and reprinted in the IRB. Higher legal weight than Notices or Rev. Ruls.
Reliance and precedential weight Rev. Ruls and Rev. Procs are precedent for the IRS; a taxpayer may rely on them. Notices and Announcements have varying reliance value depending on their content. Private Letter Rulings and Chief Counsel Advice are NOT precedent (IRC § 6110(k)(3)).

Recent developments & freshness

IRBs are published weekly by the Superintendent of Documents. High-profile recent guidance includes Notice 2024-63 (digital-asset broker reporting delays), Rev. Proc. 2024-40 (inflation adjustments for TY 2025), and ongoing guidance on the Inflation Reduction Act clean-energy credits.

For live queries against the latest source material, use the research console — available source coverage varies by edition and topic. Verify citations against the edition enforced in your jurisdiction.

Frequently-asked questions

Common questions this portal answers. For any of these, the research console can search for supporting references; check the cited edition and source before relying on an answer.

Can I rely on a Private Letter Ruling issued to another taxpayer?

No. Under IRC § 6110(k)(3), a Private Letter Ruling may not be used or cited as precedent by anyone other than the taxpayer to whom it was issued. PLRs are useful as an indication of Service thinking on a specific issue, but they are not binding on the Service in any other case. If you need reliance, request your own PLR (though the fee is substantial and the process takes months).

What's the difference between a Revenue Ruling and a Revenue Procedure?

A Revenue Ruling states the Service's position on the tax consequences of a specific fact pattern — it applies substantive tax law to hypothetical facts. A Revenue Procedure describes an administrative procedure or convention — how to make an election, what documentation to submit, when the automatic mileage rate changes. Ruling = 'this is what the law means'; Procedure = 'this is how you comply'.

Recommended Brands & Authoritative References

Big-name organizations frequently referenced across this domain. Clicks are counted anonymously as decision events and forwarded to the brand’s official homepage. Trademarks belong to their respective owners.

Westlaw (Thomson Reuters) research Premier legal research platform: case law, statutes, KeyCite citator, and Practical Law. LexisNexis research Legal research, Shepard's Citations, Lexis+, and litigation analytics. The Florida Bar regulator Unified regulatory bar for Florida attorneys — rules, ethics opinions, CLE, and lawyer referrals. Wikipedia reference Free multilingual online encyclopedia written and maintained by volunteers. Clio practice-mgmt Cloud-based practice management, time tracking, billing, and client intake for law firms. American Bar Association association Nation's largest voluntary legal association — Model Rules, publications, sections, and CLE.

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