IRS field audits 101

Picture this: You’re at your desk when you get a call from a frantic client who just received a letter from the IRS. It’s not about a refund. It’s an audit. Not just any audit, it’s a field audit. It’s not about a missing form, and it’s not about a refund. It’s an audit. Not just any audit. It’s a field audit.

If you’re a tax professional, this is where your expertise shifts from preparing returns to defending them. Here’s what you need to know about field audits: What they are, why they happen, and how to guide your clients through them without unnecessary stress.

What is a field audit?

A field audit is the IRS’s most comprehensive type of examination. Unlike correspondence audits (handled entirely by mail) or office audits (which take place at an IRS location), field audits happen on-site at your client’s home, place of business, or your own office if you’re representing them. Field audits are not casual spot-checks. They are deep dives into the taxpayer’s financial life.

The deep dive audit

A field audit is the IRS’s most thorough type of examination. Instead of mailing documents or visiting their office, a revenue agent comes to your client’s home, business, or their representative’s office. These audits dig into complex returns, including business deductions, large transactions, or multiple years.

How it differs from other audits

• Correspondence audits are by mail, usually one or two issues.
• Office audits are held at an IRS office for moderately complex issue.
• Field audits are on-site and wide-ranging; often for multiple tax years.

Think of correspondence audits as quick fact checks, office audits as structured meetings, and field audits as full-scale investigations without necessarily being adversarial.

Why the IRS might choose a return

The IRS doesn’t randomly knock on doors. A return is typically selected for a field audit for one or more of these reasons:

• Unusual patterns (DIF scoring)
• Income mismatches (document matching)
• Industry-specific concerns (compliance projects)

Sometimes, the scope expands once the agent starts looking.

Pro tip: A field audit is serious, but it’s not a conviction. Getting professional help early is your client’s best defense and best stress reducer.

What to expect during a field audit

Field audits usually begin with a pre-audit meeting or initial letter outlining what records the IRS wants to review. Common requests include:

• Bank statements and cancelled checks
• General ledgers and accounting records
• Receipts for major purchases and deductions
• Business mileage logs and travel expense records
• Payroll and employee records for businesses

The agent will typically conduct interviews either with the taxpayer directly or through their representative to clarify the nature of certain transactions. If it’s a business audit, the agent may also tour the premises to gain a deeper understanding of operations.

Bottom line

Field audits are the most comprehensive and potentially intimidating type of IRS examination. They’re not random, and they’re not necessarily a sign of wrongdoing, but they do require careful preparation and professional guidance.

By understanding how these audits work, why they happen, and how to respond effectively, you can protect your clients from unnecessary stress and help ensure the best possible outcome.