How LLC Owners Save on Taxes in 2026

Home IRS Representation IRS Summons

IRS Summons — Complete Practitioner Guide

How to respond to IRS summonses — IRC §7602 authority, third-party summonses, John Doe summonses, summons enforcement, and practitioner-client privilege protections. Updated for 2026.

IRC §7602IRS SummonsThird-Party SummonsJohn Doe SummonsSummons Enforcement

IRS Summons Authority Under IRC §7602

The IRS has broad authority to summon books, records, papers, and testimony under IRC §7602. A summons can be issued to the taxpayer directly, to third parties (banks, employers, business partners), or to unknown persons through a "John Doe" summons. The IRS can use summons authority during an examination, collection investigation, or criminal investigation.

Summons TypeIssued ToNotice RequiredTaxpayer Rights
Direct summonsTaxpayerNo advance noticeCan challenge by refusing to comply; IRS must seek enforcement
Third-party summonsThird party (bank, employer)Notice to taxpayer requiredCan petition to quash within 20 days
John Doe summonsUnknown persons (e.g., financial institution)Court approval requiredNo advance notice to affected persons
Third-party recordkeeper summonsBanks, brokers, accountantsNotice to taxpayer requiredCan petition to quash within 20 days

Source: IRC §7602-7613

Responding to a summons: When a taxpayer receives a summons, they have several options: (1) comply fully; (2) comply partially (provide some documents, object to others); (3) refuse to comply and force the IRS to seek enforcement in federal district court; or (4) petition to quash a third-party summons within 20 days. The appropriate response depends on the nature of the summons, the documents requested, and the taxpayer's exposure.

Challenging an IRS Summons

A taxpayer can challenge an IRS summons on several grounds: (1) the summons was issued for an improper purpose (e.g., to harass the taxpayer); (2) the information sought is protected by attorney-client privilege or work product doctrine; (3) the summons is overbroad or unduly burdensome; (4) the IRS already has the information requested; or (5) the summons was not properly served.

The Powell test: To enforce a summons, the IRS must establish four elements under United States v. Powell, 379 U.S. 48 (1964): (1) the investigation is being conducted for a legitimate purpose; (2) the information sought may be relevant to that purpose; (3) the information is not already in the IRS's possession; and (4) the administrative steps required by the IRC have been followed. If the IRS cannot establish all four elements, the summons will not be enforced.

Privilege protections: Documents protected by attorney-client privilege or work product doctrine are not subject to IRS summons. However, the privilege must be properly asserted — the taxpayer must provide a privilege log identifying each withheld document and the basis for the privilege claim. Blanket assertions of privilege without a privilege log are generally rejected by courts.

Third-Party Summonses — Protecting Client Interests

When the IRS issues a summons to a third party (bank, employer, accountant), the taxpayer has the right to receive notice and petition to quash the summons within 20 days. This is a critical right that practitioners must be alert to — missing the 20-day deadline forfeits the right to challenge the summons.

When to petition to quash: Practitioners should consider petitioning to quash a third-party summons when: (1) the documents sought are protected by privilege; (2) the summons is overbroad and seeks documents beyond the scope of the examination; (3) the summons was issued for an improper purpose; or (4) compliance with the summons would reveal information that could significantly harm the taxpayer's position in the examination.

John Doe summonses: A John Doe summons is issued to a financial institution or other entity to identify unknown taxpayers who may have unreported income or assets. Famous examples include IRS summonses to Swiss banks (UBS, Credit Suisse) to identify U.S. taxpayers with undisclosed foreign accounts, and summonses to cryptocurrency exchanges (Coinbase, Kraken) to identify taxpayers with unreported cryptocurrency gains. Taxpayers who receive notice that their information may have been disclosed through a John Doe summons should immediately consult with a tax attorney about voluntary disclosure options.

Frequently Asked Questions

Can I refuse to comply with an IRS summons?
Yes, but with consequences. If you refuse to comply, the IRS must seek enforcement in federal district court. The court will issue an order to show cause why the summons should not be enforced. If the court finds the summons valid, it will issue an enforcement order — and failure to comply with a court order can result in contempt of court. Refusing to comply is appropriate when there is a legitimate legal basis to challenge the summons (privilege, improper purpose, overbreadth).
What is the 20-day deadline for petitioning to quash a third-party summons?
When the IRS issues a summons to a third party (bank, employer, accountant), it must notify the taxpayer. The taxpayer has 20 days from the date of the notice to petition the federal district court to quash the summons. Missing this deadline forfeits the right to challenge the summons. Practitioners should calendar this deadline immediately upon receiving notice of a third-party summons.
Are my accountant's workpapers protected from IRS summons?
Generally no. Accountant workpapers are not protected by attorney-client privilege — the §7525 federally authorized tax practitioner privilege is limited and does not protect workpapers in most circumstances. However, workpapers prepared at the direction of an attorney under a Kovel arrangement may be protected by the attorney's work product doctrine. Practitioners should consult with a tax attorney before asserting privilege over accountant workpapers.
What is a John Doe summons?
A John Doe summons is issued to a third party (typically a financial institution) to identify unknown taxpayers who may have unreported income or assets. The IRS must obtain court approval before issuing a John Doe summons. Famous examples include summonses to Swiss banks to identify U.S. taxpayers with undisclosed foreign accounts, and summonses to cryptocurrency exchanges to identify taxpayers with unreported cryptocurrency gains.
Professional Disclaimer

The information on this page is intended for licensed tax professionals (CPAs, EAs, and tax attorneys) and is provided for educational and research purposes only. Tax law is complex and fact-specific — all strategies discussed are subject to limitations, phase-outs, and conditions that may not apply to every client situation. Practitioners should independently verify all information against current IRS guidance, Treasury Regulations, and applicable state law before advising clients. This content does not constitute legal or tax advice.

Connect Your Clients with Uncle Kam Tax Professionals

Uncle Kam's marketplace connects clients with licensed CPAs, EAs, and tax attorneys who specialize in complex IRS matters. Free to access for practitioners.

Apply to Join the Marketplace →
IRS Summons Defense on Uncle Kam

Summons Clients Need Expert Guidance. Join the Uncle Kam Marketplace.

Uncle Kam connects clients facing IRS summonses with licensed tax professionals and attorneys who specialize in summons response and challenge. Join the marketplace today.

Free access to 300+ tax strategies Join the Marketplace →