The timeline depends almost entirely on the type of audit and how complex your return is. A simple correspondence audit might wrap up in a few weeks. A field audit of a business with complicated financials can stretch past a year.

Correspondence audits are the most common. The IRS mails you a notice asking for documentation on specific items. If you respond promptly with the right paperwork, these typically resolve in one to three months. Delay your response or send incomplete information and the timeline extends.

Office audits require you to visit an IRS office with your records. These focus on more issues than a correspondence audit but are still relatively contained. Expect two to five months from the initial notice to resolution, assuming you’re prepared and responsive.

Field audits are the most extensive. An IRS agent comes to your home, business, or accountant’s office to review records in person. These audits examine multiple years or complex business operations. They routinely take six months to over a year. Some drag on for eighteen months or longer if the issues are complicated or the taxpayer is slow to provide records. Our Nampa bookkeepers have seen audits resolve quickly when documentation is organized and drag on indefinitely when it’s scattered or missing.

Several factors affect how long your audit takes. The complexity of your return matters most. A sole proprietor with straightforward income gets resolved faster than a business owner with rental properties, investments, and multiple entities. The IRS backlog also plays a role. Staffing shortages have stretched timelines across the board in recent years.

What you can control is your responsiveness and organization. Having your records in order before the audit starts makes everything move faster. Responding to every request completely and on time keeps things from stalling. Incomplete responses create follow-up requests that add weeks or months.

Working with an Enrolled Agent for IRS audit representation makes a real difference. Someone who knows what the IRS is looking for can prepare documentation correctly the first time and communicate directly with the agent on your behalf. This takes the burden off you and typically speeds up the process because there’s less back and forth over missing information.

The worst thing you can do is ignore an audit notice or drag your feet responding. That turns a manageable situation into a drawn-out problem with potential penalties and interest accumulating the entire time.