Tax Research · Brief · Working level
PLRs, TAMs, and Chief Counsel memoranda: reading guidance that binds no one
Private letter rulings, technical advice memoranda, and Chief Counsel advice cannot be cited as precedent under Section 6110(k)(3) — yet they are among the most revealing documents the IRS releases. Here is what each binds, and how to use them anyway.
Section 6110 requires the IRS to release its "written determinations" — private letter rulings (PLRs), technical advice memoranda (TAMs), and Chief Counsel advice (CCA/CCM) — to the public, redacted. Section 6110(k)(3) then takes back what it seems to give: none of them "may be used or cited as precedent." A PLR binds the IRS only with respect to the taxpayer who requested it; a TAM only for the case that generated it; a CCA binds no one at all.
Practitioners read them anyway, and should. They are the clearest window into how the IRS National Office actually analyzes an issue — which is different information from what the law is, and often just as valuable.
The three species
Who asked, when, and who is bound distinguishes the three documents.
| PLR | TAM | CCA / CCM | |
|---|---|---|---|
| Requested by | Taxpayer (usually pre-filing) | Exam or Appeals, in a live case | Field personnel, informally |
| Timing | Before the transaction or return | During examination/appeal | Any time |
| Binds | IRS, for that taxpayer only | IRS, for that case only | No one |
| User fee | Yes (substantial) | No | No |
| Reliance by others | None | None | None |
A PLR answers a taxpayer's advance question about a specific transaction; the taxpayer can rely on it if the facts were fully and accurately described, and revocation is rarely retroactive absent misstatement. A TAM resolves a disputed technical issue mid-examination — for the researcher, TAMs are especially telling because they show what the field is fighting about right now. Chief Counsel advice (including field attorney advice and generic legal advice memoranda) is internal lawyer-to-lawyer analysis, released under the same statute; it carries the least formality and often the most candor.
All three are searchable free through the IRS's written-determinations releases on irs.gov; published guidance, by contrast, lives in the Internal Revenue Bulletin and carries the different, higher status described in Revenue rulings vs. revenue procedures.
What "not precedent" does and does not mean
It means you cannot argue that the IRS must treat your client like the PLR recipient, and a court will disregard the citation as authority. It does not mean the documents are useless:
- Substantial authority. Treas. Reg. §1.6662-4(d)(3)(iii) expressly lists private letter rulings and technical advice memoranda among the authorities considered for the substantial-understatement penalty (with weight diminished for older items and for TAMs issued to others). A favorable PLR line can carry a position across the penalty threshold even though it wins nothing on the merits — the mechanics are in The substantial authority standard.
- Predictive value. Ten consistent PLRs on a structuring question tell you what the National Office will do with the eleventh request, and what an examiner's technical advisors will say.
- Roadmaps. A TAM adverse to another taxpayer is a free preview of the IRS's best arguments against yours — including the facts it treats as dispositive, which should shape your documentation before exam, in the spirit of audit-readiness documentation.
- Duty of consistency, informally. Examiners dislike being shown that the National Office reached the opposite conclusion on identical facts, whatever Section 6110(k)(3) says. It is persuasion, not law, and it works more often than the statute implies.
Using them without overreaching
Cite written determinations in a research memo in a clearly separated tier: statute and regulations first, published guidance next, cases, and only then "non-precedential administrative material," each with its release number and a note that it is cited for insight and substantial-authority weight, not as precedent. Never let a memo's conclusion rest on a PLR alone; if the only support is private rulings, say the published law is unsettled and price the risk accordingly.
Frequently asked questions
- Can I cite a private letter ruling as precedent?
- No. Section 6110(k)(3) provides that written determinations — private letter rulings, technical advice memoranda, and similar items — may not be used or cited as precedent. A PLR binds the IRS only as to the taxpayer who requested it. It can still count as 'authority' for the substantial-authority penalty standard and reveals how the IRS analyzes an issue.
- What is the difference between a PLR and a TAM?
- A private letter ruling is issued to a taxpayer before filing, in response to a request about a proposed or completed transaction. A technical advice memorandum is issued during an examination or appeal, when the field asks the IRS National Office to resolve a technical issue in a live case. Both are written determinations under Section 6110 and neither is precedent.
- Why read guidance that cannot be cited?
- Because it shows the IRS National Office's current analytical framework: which regulations it emphasizes, which arguments it accepts, what facts it treats as decisive. A string of consistent PLRs signals settled administrative practice, and PLRs and TAMs are expressly included in the authority list for avoiding the substantial-understatement penalty.