IRS Correspondence Audits
Understanding the Most Common Type of IRS Audit
When most people think about an IRS audit, they imagine sitting across the table from an IRS Revenue Agent. In reality, the majority of IRS examinations are conducted entirely through the mail or through secure electronic correspondence. These examinations are known as correspondence audits, and they are the most common type of IRS audit.
Rather than scheduling an in-person meeting, the IRS sends a letter identifying specific items on your tax return that require additional documentation or explanation. The taxpayer is asked to provide supporting records by a stated deadline. After reviewing the information submitted, the IRS will either accept the explanation, request additional information, or propose changes to the return.
Although correspondence audits are generally less intrusive than office audits or field audits, they should not be viewed as routine paperwork. A timely, organized, and well-supported response can significantly influence the outcome of the examination.
Key Takeaways
- Correspondence audits are the most common type of IRS examination.
- Most are conducted entirely by mail or secure electronic communication.
- The IRS usually requests documentation supporting one or more items reported on the return.
- Many correspondence audits involve only a limited number of issues rather than the entire tax return.
- Well-organized responses often help resolve the examination more efficiently.
What Is an IRS Correspondence Audit?
A correspondence audit is an examination conducted primarily through written communication rather than face-to-face meetings. The IRS identifies one or more items reported on the tax return and asks the taxpayer to provide documentation supporting those items. The examination is typically handled by an IRS tax examiner rather than a Revenue Agent, although the specific personnel involved may vary depending on the issues being examined.
Unlike field audits, which often involve a broad review of a taxpayer's books and records, correspondence audits generally focus on specific issues. For example, the IRS may request documentation supporting charitable contributions, education credits, business expenses, retirement distributions, stock basis, or other individual items reported on the return.
Because the scope of a correspondence audit is often limited, many taxpayers assume the examination is simple. While some correspondence audits are resolved quickly, others can expand if the IRS determines additional information is needed or discovers related issues during its review.
Issues Commonly Examined
Charitable Contributions
Receipts, acknowledgments, appraisals, and documentation supporting charitable deductions.
Business Expenses
Schedule C expenses, vehicle deductions, travel, meals, and other business-related costs.
Income Verification
Differences between information reported on Forms W-2, 1099, or Schedule K-1 and the tax return.
Tax Credits
Education credits, refundable credits, dependency claims, and other credits requiring supporting documentation.
Investment Transactions
Stock basis, cryptocurrency transactions, capital gains, and brokerage reporting.
Retirement Distributions
Rollovers, IRA distributions, pension income, and retirement account reporting.
What Happens During a Correspondence Audit?
A correspondence audit usually follows a fairly predictable sequence. While every examination is unique, understanding the process can help reduce uncertainty and allow you to prepare an organized response. Most correspondence audits involve only one or several specific issues rather than a complete examination of the entire tax return.
You Receive an IRS Notice
The process begins when the IRS sends a letter identifying the items it would like you to substantiate. The notice explains what documentation is requested and provides a deadline for responding. Read the notice carefully—many correspondence audits focus on only one or two issues.
Gather Supporting Documentation
Collect the records that support the items under examination. Depending on the issue, this may include receipts, cancelled checks, bank statements, mileage logs, brokerage statements, closing documents, invoices, accounting records, charitable acknowledgments, or other supporting evidence.
Prepare an Organized Response
Providing documentation is only part of the process. Organizing the records in a logical manner and explaining how they support the tax return often makes the examiner's review more efficient. Well-organized submissions frequently reduce unnecessary follow-up requests.
IRS Review
After receiving your response, the IRS reviews the documentation. The examiner may accept the explanation, request additional information, or determine that adjustments to the return are appropriate.
Resolution
Many correspondence audits conclude after one or two rounds of communication. If disagreements remain, the IRS may propose adjustments that the taxpayer can accept or challenge through available administrative procedures.
Common Mistakes Taxpayers Make
Ignoring the Notice
Missing response deadlines can result in the IRS proposing adjustments based solely on the information available to it.
Sending Too Much Information
Taxpayers sometimes respond by mailing hundreds of pages of records without organization or explanation. More documents do not necessarily make a stronger case.
Sending Too Little Information
Providing incomplete documentation often leads to additional IRS requests or proposed adjustments that could have been avoided.
Missing the Issue
Some taxpayers respond without first identifying exactly what the IRS is questioning. Respond directly to the issues identified in the notice rather than providing unrelated records.
Poor Organization
Clearly labeled documents, summaries, and organized exhibits are generally easier for an examiner to review than disorganized stacks of receipts.
Waiting Until the Deadline
Gathering records often takes longer than expected. Starting early provides time to locate missing documents and prepare a thoughtful response.
When Does Professional Representation Make Sense?
Not every correspondence audit requires professional representation. Some examinations involve straightforward issues that taxpayers can resolve by providing the requested documentation. However, representation may be beneficial when the examination involves multiple issues, significant amounts of tax, business records, cryptocurrency, real estate transactions, or complex accounting questions.
Professional representation may also be appropriate when the taxpayer is uncertain how to respond, disagrees with the IRS's position, or wishes to have a CPA communicate directly with the IRS throughout the examination.
If you would like to learn more about how we assist taxpayers during IRS examinations, visit our IRS Audit Representation page.
How Correspondence Audits Compare to Other IRS Audits
Correspondence audits are only one type of IRS examination. Understanding how they differ from office audits and field audits can help taxpayers understand what to expect and when additional professional assistance may be appropriate.
| Feature | Correspondence Audit | Office Audit | Field Audit |
|---|---|---|---|
| Location | Mail or secure electronic communication | IRS office | Taxpayer's home, business, or representative's office |
| Typical Scope | One or several issues | Moderate | Comprehensive |
| IRS Personnel | Tax Examiner | Tax Compliance Officer | Revenue Agent |
| Records Requested | Specific documents | Supporting documentation | Books, records, accounting systems, interviews |
| Complexity | Generally lower | Moderate | Often the most complex |
CPA Perspective
One misconception I frequently encounter is that a correspondence audit is "just a letter" that can be answered casually. While many correspondence audits are relatively limited in scope, the IRS is still conducting an examination of your tax return. The quality of the response matters. A clear explanation supported by organized documentation is generally far more effective than sending stacks of unorganized records or ignoring issues raised in the notice.
In my experience, taxpayers often improve their chances of resolving a correspondence audit efficiently by first understanding exactly what the IRS is asking and then responding directly to those questions with complete, well-organized documentation.
Frequently Asked Questions
Can a correspondence audit become an office or field audit?
Yes. Although many correspondence audits are resolved through the mail, the IRS may request additional information or expand the examination if significant unresolved issues remain.
How long does a correspondence audit usually take?
The timeline varies depending on the complexity of the issues, the IRS workload, and how quickly the requested documentation is provided. Some audits conclude within a few months, while others take longer.
Do I have to mail original documents?
Generally, taxpayers should retain their original records and provide copies unless the IRS specifically requests otherwise.
Can a CPA represent me during a correspondence audit?
Yes. A taxpayer may authorize a CPA to communicate with the IRS, organize documentation, prepare responses, and assist throughout the examination.
Will every correspondence audit result in additional tax?
No. Many correspondence audits conclude with no change after the IRS receives adequate documentation supporting the items under examination.
Related IRS Audit Resources
- IRS Audit Process — Learn what happens from the initial audit notice through final resolution.
- Types of IRS Audits — Compare correspondence, office, and field audits.
- IRS Audit Representation — Learn how a CPA can assist during an examination.
- What Triggers an IRS Audit? — Understand common factors that may lead to an IRS examination.
Received a Correspondence Audit Notice?
Whether you're responding to your first IRS letter or have already exchanged correspondence with the IRS, understanding the examination process is the first step. If your audit involves complex tax issues, business records, or significant proposed adjustments, professional representation may help you prepare an organized and effective response.
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