How long does an audit last?

How long an audit lasts depends on the type of audit, complexity, and how quickly you respond. For IRS audits, a simple correspondence audit done by mail where the IRS asks for documentation for a single item like charitable donations may last 2 to 6 months from initial notice to resolution if you respond promptly. An office audit where you meet an IRS agent at a local IRS office for small business or itemized deduction questions typically lasts 3 to 12 months. A field audit where an agent comes to your home or business to examine extensive records for businesses, high income, or complex returns is the longest and can last 6 months to over a year, sometimes up to 2 years if there are disputes, appeals, or need for additional information. The IRS generally has 3 years from filing date to audit a return, extended to 6 years if substantial understatement over 25 percent, and unlimited if fraud is suspected. You can shorten audit time by organizing records, responding quickly to Information Document Requests, being cooperative but concise, and hiring a CPA or tax attorney if complex, which helps avoid delays from incomplete information.