IRS Audit Defense: What Auditors Look For and How Cases Are Won

An audit letter triggers a level of dread out of proportion to what an audit actually is: a document review with rules. The auditor has a scope, you have rights, and the outcome turns on preparation, not personality. After three decades of these, I can tell you the cases that go badly share one feature - the taxpayer treated it casually until it was not.

The Three Flavors

Correspondence audits happen by mail and target one or two items - a credit, a deduction, a mismatch. Office audits bring you into an IRS office with a document list. Field audits send a revenue agent to your business, and they are the serious ones, typically reserved for businesses and complex returns. Each tier deserves a different level of response, but none deserves improvisation.

How Auditors Think

Auditors work issue lists. They are trained on what returns like yours usually get wrong: unreported income matched against third-party reporting, large deductions out of proportion to income, cash-heavy businesses, vehicle and travel expenses, basis on property sales. On business audits, the bank deposit analysis is the centerpiece - every deposit is presumed income until you prove otherwise, so the loan from your brother and the transfer between your own accounts need documentation.

Here is the defense principle that matters most: answer what is asked, completely and accurately, and nothing more. Volunteering documents outside the scope invites scope expansion. Friendly chatter creates admissions. There is a reason represented taxpayers often never meet their auditor - representation routes everything through counsel, on paper, on the record.

Reconstruction and Resolution

Missing records are not fatal. The law allows reasonable reconstruction - bank records, vendor statements, mileage logs rebuilt from calendars, industry-standard estimates in the right circumstances. Courts have long recognized that taxpayers with imperfect records can still substantiate deductions, and a defensible reconstruction beats a forfeited deduction every time.

When the audit ends, you are not required to agree. The examination report is a proposal, and disagreeing sends the case to Appeals, where settlement based on the hazards of litigation is the official mission. Audits are won during the audit, but they are also won after it. If a letter just arrived, get representation before your first response - that response sets the tone for everything. Let's talk.