IRS Administrative Appeals Process: Protests, CDP, and Mediation

The IRS administrative appeals process lets you challenge an audit result, a denied refund claim, a proposed penalty, or a collection action through the Independent Office of Appeals without going to court. The office was established by statute under 26 U.S.C. § 7803(e) and operates separately from the IRS divisions that examined your return or started collection, with officers required to resolve disputes fairly and impartially toward both sides.¹ It is free to use, and for most people it ends the dispute without a courtroom ever getting involved.

When You Get the Right to Appeal

Your right to an administrative appeal usually starts when the IRS sends a “30-day letter.” That letter proposes changes to your return and gives you 30 days from its date to file a protest with the office that sent it. Different versions cover different situations: Letter 525 accompanies a report of proposed adjustments, Letter 950 covers straightforward deficiency cases, and Letter 3391 addresses situations where the IRS believes you failed to file a required return. All of them do the same job of telling you what the IRS wants to change and opening a window for you to disagree.²

Miss the 30 days and the IRS doesn’t drop the matter. In deficiency cases, it will issue a statutory Notice of Deficiency (the 90-day letter), and your only way to contest the tax without paying first is to petition the U.S. Tax Court within 90 days, or 150 days if you’re outside the United States. You still have rights after a missed 30-day deadline, but they narrow toward litigation rather than a free administrative resolution.

Appeals rights also arise from denied claims for refund, rejected offers in compromise, certain penalty assessments, and collection actions like liens and levies. In each case some IRS office must first make a determination you disagree with before Appeals can take the matter.

Disputes Appeals Will Not Hear

Some categories are off the table. Final regulations published in January 2025 spell out what the Independent Office of Appeals will not consider, including:

Positions the IRS has identified as frivolous under Section 6702(c).
Cases where a criminal prosecution or referral is underway, unless the Office of Chief Counsel or the Department of Justice agrees.
Whistleblower award determinations under Section 7623, which follow a separate track.
The IRS’s decision to certify a seriously delinquent tax debt to the State Department for passport purposes.
Issues already resolved by closing agreement under IRC 7121.
Cases already referred to the Department of Justice.

The full list runs longer and includes narrower technical categories such as competent authority cases under tax treaties and certain tax-exempt status determinations tied to prior Technical Advice Memoranda. If you’re unsure whether your situation qualifies, the Federal Register notice contains the complete set of exceptions.³

How to File: Small Case Request or Formal Protest

How you file depends on the dollars at stake. The IRS draws the line at $25,000 per tax period, meaning the combined total of additional tax, penalties, and interest the IRS is proposing.

Small Case Request (Up to $25,000)

If the proposed changes for any single tax year total $25,000 or less, use Form 12203, Request for Appeals Review. It’s a short form: identify the letter you received, check off the items you disagree with, and give a brief explanation.⁴ You sign and date to certify accuracy. A brief written statement can substitute, but Form 12203 is what the IRS expects.⁵

Formal Written Protest (Over $25,000)

Above $25,000 for any tax period, the IRS requires a formal written protest, which is a letter rather than a form. It needs to include:

Your name, address, Social Security number or employer identification number, and a daytime phone number.
A reference to the specific IRS letter and the tax years or periods involved.
A list of each proposed change you disagree with.
A statement of facts for each disputed item, signed under penalties of perjury.
The legal basis for your position, citing the Internal Revenue Code, Treasury Regulations, or other authority.

Attach a copy of the IRS examination report so the appeals officer can work from the same figures. Skip the penalties-of-perjury signature and the IRS can reject the protest as incomplete.

For either type of request, gather your supporting documentation before filing: bank statements, receipts, payroll records, contracts, anything that proves the facts you rely on. The officer won’t have records you didn’t submit, and arriving at a conference with new evidence wastes everyone’s time.

Where to Send It

Mail your protest or small case request to the IRS office that sent the letter, not directly to the Independent Office of Appeals. The originating office needs to package your file and forward it. Sending it to Appeals directly will delay your case and may keep it from being considered at all.⁵ There is currently no electronic portal for submitting a protest. Use certified mail with return receipt and keep copies of everything.

Expect the overall process to move slowly. After the originating office receives your protest, it typically takes several weeks to several months for the file to be transferred to an appeals officer. Once assigned, the officer will contact you to schedule a conference. Straightforward cases often resolve in six months to a year; complex matters run longer. Interest on any unpaid tax keeps accruing from the original due date throughout.

Collection Appeals: CDP and CAP

If your dispute involves a lien, levy, or seizure rather than an audit adjustment, you have two separate paths, and choosing the wrong one can cost you important rights.

Collection Due Process (CDP) Hearings

When the IRS files a federal tax lien or sends a notice of intent to levy, it must also notify you of your right to a Collection Due Process hearing. You have 30 days from that notice to request the hearing on Form 12153.⁶ A timely CDP request suspends levy activity while the hearing and any subsequent court proceedings are pending, and it suspends the collection statute of limitations at the same time.⁷

Miss the 30-day deadline and you may still request an “equivalent hearing” within one year plus five business days for lien notices, or one year for levy notices. An equivalent hearing does not suspend collection activity and does not give you the right to petition the Tax Court afterward.⁸

At the CDP hearing, the officer considers whether the IRS followed proper procedures, whether you’ve been offered appropriate collection alternatives such as an installment agreement or offer in compromise, and whether the proposed action balances the government’s need to collect against the burden on you. You can challenge the underlying tax liability only if you didn’t receive a prior Notice of Deficiency or otherwise had no earlier chance to dispute what you owe.

Collection Appeals Program (CAP)

CAP is faster and less formal than CDP, and it covers a broader range of collection actions, including some that don’t come with a CDP notice. It can sometimes be initiated with a phone call to the collection office listed on your notice. The trade-off: CAP does not give you the right to go to Tax Court if you disagree with the outcome. When court access matters and CDP is available, choose CDP.

What Happens at the Appeals Conference

The conference is an informal meeting, not a courtroom hearing. It can take place by phone, video, or in person at a local IRS office. There is no cross-examination and no rules of evidence. The appeals officer walks through the disputed items, asks questions, and listens to your position.

The Standard the Officer Applies

Appeals officers don’t simply pick a winner. They evaluate the hazards of litigation, meaning how likely each side would prevail if the case went to trial. If the IRS’s legal position has clear weaknesses, the officer has authority to concede partially or fully, even when the examining agent wouldn’t move. That’s where the process has real teeth. The officer is weighing litigation risk, not rubber-stamping the audit.

Ex Parte Communication Protections

One of the strongest built-in protections is the prohibition on ex parte communications. The appeals officer cannot have private conversations with the examining agent about the strengths and weaknesses of your case, the credibility of your evidence, or how the officer should lean.⁹ If the officer needs to discuss the merits with the originating function, you or your representative must have the chance to participate. Routine administrative exchanges are allowed without you present, but anything touching the substance of the dispute is not, unless you’re in the room or on the call. If an improper communication does occur, the remedy usually involves notifying you, sharing what was discussed, and giving you time to respond. In more serious cases the matter can be reassigned to a different officer.

Signing Off: Which Agreement Form Does What

If you and the officer reach a resolution, you’ll sign an agreement form. The choice matters:

Form 870 (or Form 4549) is a waiver of restrictions on assessment. Signing lets the IRS assess the tax immediately without issuing a Notice of Deficiency. It’s not a binding closing agreement, so you can still file a refund claim later.
Form 870-AD is used when both sides make meaningful concessions. It is signed by you and the IRS and includes language indicating the case is closed. It provides more finality than Form 870 but is still not technically a closing agreement under IRC 7121.
Form 866 and Form 906 are true closing agreements under IRC 7121. Form 866 covers your entire tax liability for the period; Form 906 covers specific issues. Once signed and approved, they are final and cannot be reopened absent fraud or misrepresentation.

If you want to preserve the option to file a refund claim later, Form 870 leaves that door open. If you want certainty that the IRS won’t revisit the issue, ask for Form 866 or Form 906.¹⁰

Faster Alternatives: Fast Track and Post-Appeals Mediation

The standard process isn’t your only route. Two accelerated programs can save months.

Fast Track Settlement

Fast Track is a voluntary mediation you can request while your case is still with the examining or collection officer, before it reaches the formal appeals stage. An appeals officer acts as mediator while the original IRS employee stays involved. Neither side is forced to accept a proposed resolution, and if Fast Track doesn’t work, you keep your full right to a traditional appeal afterward.¹¹

Timelines vary by case type. For individuals, small businesses, and tax-exempt organizations, the target is 60 days from acceptance. Large businesses with international operations get 120 days. Collection-related Fast Track mediation, covering offers in compromise and trust fund recovery penalties, targets 40 days. Apply using Form 14017, or Form 13369 for collection cases.¹¹

Post-Appeals Mediation

If you’ve been through a traditional appeals conference and still can’t resolve one or more issues, Post-Appeals Mediation brings in a second, trained mediator from Appeals. You keep control over every decision; the mediator cannot impose an outcome. The goal after acceptance is 60 to 90 days. You must first make a genuine effort to resolve all issues with your appeals officer before requesting the mediator. Cases already docketed in court, cases designated for litigation, offers in compromise processed at an IRS campus site, and certain collection disputes are excluded.¹²

If No Agreement Is Reached

When the conference ends without a settlement, the IRS issues a statutory Notice of Deficiency. That’s the agency’s final word on what it believes you owe, and it starts a strict clock: 90 days from the mailing date to file a petition with the U.S. Tax Court, or 150 days if the notice is addressed outside the United States. Filing with the Tax Court lets you challenge the proposed tax before paying it. Miss the deadline and the IRS assesses the tax; your only remaining option is to pay in full and sue for a refund in federal district court or the Court of Federal Claims.

The 90-day window is not flexible. The Tax Court has consistently dismissed late-filed petitions for lack of jurisdiction. Treat the 90th day as a hard wall.

Statute of Limitations and Form 872

The IRS generally has three years from the date you filed your return to assess additional tax. If the appeals process threatens to run past that deadline, the IRS will ask you to sign Form 872, Consent to Extend the Time to Assess Tax. You’re not required to sign, but refusing typically forces the IRS to issue a Notice of Deficiency immediately to protect its position, which ends the appeals process before it begins.¹³ Signing a limited extension to a specific date, rather than an open-ended one, is usually the better move if you want a shot at administrative resolution.

Getting Help: Who Can Represent You

You can represent yourself at every stage, and many people do so successfully in straightforward cases. If the amounts are significant or the legal issues are complex, professional help is worth considering.

Only attorneys, certified public accountants, and enrolled agents have unlimited representation rights before all IRS offices, including Appeals.¹⁴ Tax return preparers who aren’t one of those three have limited rights: they can represent you during an audit if they prepared the return, but they cannot appear before appeals officers.¹⁵ Family members, full-time employees representing their employer, and officers representing their corporation can also appear in limited circumstances without being a credentialed practitioner.

To authorize a representative, file Form 2848, Power of Attorney and Declaration of Representative. Specify the exact tax matters (form type and tax years); writing “all years” or “all taxes” will get the form rejected. Joint filers who both want representation must each file a separate Form 2848. You can submit online at IRS.gov/Submit2848, or by fax or mail. Mailed or faxed submissions require a handwritten signature; typed or digital signatures aren’t accepted.¹⁵

Recovering Costs

If you hire a professional and substantially prevail against the IRS, you may recover reasonable administrative costs under IRC 7430. Your case must not have been before any court, the IRS’s position must not have been substantially justified, and you must not have unreasonably dragged out the proceedings. Net worth limitations also apply. The base hourly rate cap for attorney or representative fees is $125, adjusted annually for inflation.¹⁶ Claiming a higher rate requires an affidavit showing special circumstances, such as the difficulty of the issues or the unavailability of local tax expertise. File your written request for costs within 90 days after the IRS’s final determination.¹⁷

Frivolous Arguments Carry Penalties

The appeals process is for legitimate disagreements over how the tax law applies to your facts. It is not a platform for arguments that taxes are unconstitutional, that wages aren’t income, or that filing is voluntary. Raising positions the IRS considers frivolous doesn’t just fail; it can trigger serious financial penalties.

If a frivolous case reaches the Tax Court, the court can impose a penalty of up to $25,000 for maintaining a frivolous or groundless position, or for filing primarily to delay collection.¹⁸ Appellate courts have additional sanctioning authority and can award damages and double costs to the government. Separately, the IRS can assess a $5,000 penalty under IRC 6702 for filing a frivolous tax return or submission, and that penalty applies at the administrative level, before any court is involved. Appeals officers are also specifically prohibited from considering cases built on positions identified as frivolous under Section 6702(c).³ Filing that kind of appeal wastes your time, risks penalties, and can make the IRS less inclined to work with you on any legitimate issues in the same case.

1
Office of the Law Revision Counsel. 26 U.S. Code 7803 – Commissioner of Internal Revenue
2
Internal Revenue Service. Letters and Notices Offering an Appeal Opportunity
3
Federal Register. Resolution of Federal Tax Controversies by the Independent Office of Appeals
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Internal Revenue Service. Form 12203 – Request for Appeals Review
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Internal Revenue Service. Preparing a Request for Appeals
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Internal Revenue Service. Collection Due Process (CDP) FAQs
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Office of the Law Revision Counsel. 26 USC 6330 – Notice and Opportunity for Hearing Before Levy
8
Internal Revenue Service. Form 12153 – Request for a Collection Due Process or Equivalent Hearing
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Internal Revenue Service. Revenue Procedure 2012-18 – Ex Parte Communications Between Appeals and Other Internal Revenue Service Employees
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Internal Revenue Service. IRM 8.6.4 Reaching Settlement and Securing an Appeals Agreement Form
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Internal Revenue Service. Fast Track
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Internal Revenue Service. Post-Appeals Mediation
13
Internal Revenue Service. EP Examination Process Guide – Section 7 – Statute Protections
14
Internal Revenue Service. Regulations Governing Practice Before the Internal Revenue Service (Circular 230)
15
Internal Revenue Service. Instructions for Form 2848 – Power of Attorney and Declaration of Representative
16
Office of the Law Revision Counsel. 26 USC 7430 – Awarding of Costs and Certain Fees
17
eCFR. 26 CFR 301.7430-2 – Requirements and Procedures for Recovery of Reasonable Administrative Costs
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Office of the Law Revision Counsel. 26 U.S. Code 6673 – Sanctions and Costs Awarded by Courts