IRS Audit by Mail vs. In-Person Examination
Most IRS examinations happen by mail, but some take place face to face at an IRS office or your place of business. Here is how the two formats differ and how to prepare for each.
IRS examinations are commonly handled in one of two ways: by correspondence, meaning the IRS requests documents by mail, or face to face, which can be an office audit at an IRS office or a field audit at your home, your business, or your representative’s office. Most examinations are correspondence audits, and they are usually narrow, often centered on a single deduction or income item. A face-to-face audit is broader by nature and involves an examiner you meet in person. The notice you receive tells you which format applies and which records are in question, so the first thing to do is read it and identify the type.
Correspondence Audit: Documents by Mail
A correspondence audit happens entirely through the mail. The IRS sends a letter that names a specific issue and the records it wants, you mail back copies of those records, and the examiner reviews them and responds. There is no meeting and no office visit.
These are the most common examinations, and they tend to be focused. A typical one might question one deduction on one return. Because the scope is narrow, your task is narrow too: gather the documents that substantiate that exact item, organize them clearly, and send copies by the deadline. Keep originals and keep a duplicate of everything you send.
Office Audit: An Appointment at an IRS Office
An office audit is a scheduled appointment at a local IRS office. You bring the requested records and meet with an examiner who reviews them with you and may ask questions about how you arrived at the figures on your return.
Office audits usually cover more ground than a mail audit but stay confined to the items the notice identifies. The in-person format means you can explain your records directly, which helps when a position needs context. Prepare the same way you would for any examination: organize your documents by issue and tax year, and bring a clean, labeled package so the examiner can follow your reasoning without hunting.
Field Audit: Examination at Your Location
A field audit takes place at your home, your business, or your representative’s office. It is the most comprehensive format. An examiner may want to see your business operation, your books in their full context, and how your records are kept day to day.
Because a field audit can range wider, many people in this situation choose to work with a representative and have the examination held at the representative’s office. That keeps the process organized and gives you professional support throughout. The preparation principle does not change: records organized by issue and tax year, with a traceable line from each document to the number on your return.
A Quick Comparison
| Feature | Correspondence | Office Audit | Field Audit |
|---|---|---|---|
| Where it happens | By mail | An IRS office | Home, business, or representative’s office |
| Typical scope | Narrow, often one issue | Moderate | Broadest |
| Contact | Letters and copies | In-person appointment | In-person at your location |
| How records move | Mailed copies | Brought to the meeting | Reviewed on site |
The common thread across all three is the written request. Whatever the format, the IRS identifies the specific records it wants, and you provide exactly that.
Run the Tax Return Documentation Checkup to review your own records before you file.
What the Notice Normally Identifies
Whatever the format, the notice does the same work. It names the tax year under review, lists the issues or line items in question, states the records the IRS wants, and gives you a response deadline. Read those four things first. They define the whole scope of what you need to prepare, and they keep you from over-gathering.
Deadlines, Extensions, and Representation
Every examination comes with a response date, and meeting it matters. If you need more time to assemble records, you can generally ask for an extension rather than miss the deadline. Asking early is far better than going silent.
You also have the right to representation. You can authorize a CPA, an enrolled agent, or a tax attorney to deal with the IRS on your behalf, and for a face-to-face audit that representative can attend or handle the meeting for you. Taxpayers can also view certain correspondence-audit status details in their IRS Online Account, which is a useful way to confirm where a mail examination stands.
Preparing Records by Issue and Tax Year
The preparation that works is the same in every format. Build a labeled section for each issue the notice names. Lead each section with a one-page summary stating the line item, the amount reported, and the documents attached. Place the supporting receipts, statements, and logs in date order behind it, and include any ledger export that ties to the exact figure on your return. Number the pages and keep a full copy for yourself.
When to Bring in a Professional
A simple correspondence audit over one clear deduction is often something you can handle yourself. Lean toward professional help when the examination is face to face, when several tax years or large dollar amounts are involved, when a position is genuinely uncertain, or when you would simply rather have an experienced advocate manage the process. A CPA, enrolled agent, or tax attorney can represent you and speak with the IRS on your behalf.
Before you file each year, organize your records by issue as you go. That single habit makes any future examination, in any format, a matter of pulling a folder.
Run the Tax Return Documentation Checkup to review your own records before you file.
Related guides
- What Records the IRS May Request in an Audit
- IRS Notice Response Checklist: What to Do in the First 48 Hours
- CP2000 Notice vs. IRS Audit: How to Tell What the IRS Wants
Frequently Asked Questions
What is the difference between a correspondence audit and a field audit?
A correspondence audit is handled entirely by mail, with the IRS requesting documents and you sending copies. A field audit is conducted in person at your home, business, or representative’s office and is broader in scope.
Can I have someone represent me in an audit?
Yes. You can authorize a CPA, enrolled agent, or tax attorney to deal with the IRS on your behalf, including attending or handling a face-to-face audit for you.
Can I check the status of a mail audit?
Taxpayers can view certain correspondence-audit status details in their IRS Online Account. It is a reliable way to see where a mail examination stands.
Sources
Last reviewed: June 21, 2026.
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