IRS Audit Defense

An IRS audit defense strategy protects you when the IRS questions your return. Whether you’re facing an examination notice, a proposed adjustment, or an appeal, professional CPA-led representation handles each stage—from initial response through appeals and beyond. We represent individuals, business owners, and sales-tax payers nationwide, so you’re not alone in the process.

What IRS Audit Defense Covers: Exam, Appeals & Beyond

IRS audits unfold in three distinct stages: the initial examination, the appeals process, and post-assessment response. An IRS audit defense strategy addresses all three. A CPA with audit defense expertise represents you at each stage, negotiating directly with IRS examiners and appeals officers on your behalf.

This covers individual returns, business entities (S-corps, partnerships, LLCs), and sales-tax audits nationwide. Rather than hourly billing that leaves you guessing at the final bill, we use fixed engagement fees so you know your costs upfront. No surprises, no meter running while you wait for answers.

• Initial exam response and documentation strategy
• Formal appeals representation with settlement authority
• Refund claims and post-assessment negotiations
• Fixed fees—budget with confidence

Critical IRS Audit Deadlines You Cannot Miss

The IRS typically initiates contact 12–24 months after you file. That first notice arrives with a response deadline—usually 30 days from the notice date. Miss that window, and the IRS automatically accepts their proposed changes. No second chance.

If the IRS proposes adjustments, you receive a 30-Day Letter. You have 30 days to file a written protest and request an appeal. If you don’t appeal and the IRS issues a Notice of Deficiency (the 90-Day Letter), that notice triggers a 90-day window to petition Tax Court before the assessment locks in permanently. These aren’t suggestions; they’re hard stops.

Understanding your statute of limitations window is equally critical. For most returns, the IRS has three years from the filing date to audit. If you omitted more than 25% of reported gross income, that window extends to six years. Fraud or unfiled returns have no statute at all. Your CPA will map this out so you know exactly when the IRS’s authority expires.

Why CPA-Led Audit Defense Works Better Than Solo Response

When you respond alone to an audit notice, you’re negotiating with someone trained in tax law who’s heard every argument before. A CPA brings credibility and technical fluency that examiners and appeals officers respect. They speak the same language and understand settlement strategy in ways a business owner simply can’t.

More importantly, appeals officers aren’t the same people as examiners—they apply a different standard and have settlement authority examiners don’t have. The IRS reports a 40–60% concession rate at Appeals, meaning nearly half of proposed adjustments get reduced or withdrawn entirely. That’s where professional representation pays dividends.

A CPA also handles the work behind the scenes: documentation gathering, substantiation strategy, and formal protest preparation. You avoid costly errors like missed deadlines, weak documentation, or inadvertent admissions that strengthen the IRS’s position. One wrong statement in a letter can derail your defense.

How TFR Handles Your Audit From Start to Finish

Our audit defense process is straightforward and transparent:

• Step 1: Free case review identifies your audit scope, statute status, and risk exposure
• Step 2: We conduct a documentation audit, gathering returns, receipts, and records to support your position
• Step 3: CPA representation at exam or appeals; we negotiate on your behalf with fixed fees upfront
• Step 4: Post-assessment support if needed—refund claims, collection defense, or Tax Court preparation

Many clients discover problems in their recordkeeping during this process. That’s where our catch-up bookkeeping services step in to fill gaps and strengthen your audit position. We also help small business bookkeeping clients prevent future audit risk through cleaner processes.

Statute of Limitations: Know When the IRS Deadline Expires

Your statute of limitations is your invisible wall. The standard statute is three years from the filing date or due date, whichever is later. A 2024 return filed on April 15, 2025 has a statute expiring April 15, 2028. But if you omitted more than 25% of gross income reported on your return, that window extends to six years.

There’s no statute for fraud or unfiled returns—the IRS can pursue you indefinitely. Understanding where you stand in your statute window is critical to appeals strategy and settlement leverage. If you’re near the end of your three-year window, the IRS has less time to dig deeper, and that affects negotiating power.

Learn more about bookkeeping pitfalls and how to avoid them so you don’t create audit risk in the first place.

Frequently Asked Questions

What’s the difference between an IRS audit and audit defense?

An IRS audit is the examination itself—the IRS reviews your return and questions items. Audit defense is your professional response: hiring a CPA or attorney to represent you, substantiate your position, and negotiate with the IRS. A CPA offers the same courtroom authority as a tax attorney in most audit situations and typically costs less.

How long does an IRS audit typically take?

Correspondence audits (handled by mail) usually finish in 3–6 months. Office audits at an IRS facility typically complete in 2–3 months. Field audits (at your home or business) can last 6–18 months. Appeals add time but significantly improve your odds—40–60% of proposed adjustments are reduced or withdrawn at the Appeals level.

Can I appeal an IRS audit decision?

Yes. You have 30 days from the 30-Day Letter to file a written protest and request an appeal. Appeals officers have settlement authority that examiners don’t, and they apply a different standard. Professional CPA representation during appeals substantially improves your chances of a favorable outcome.

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Last reviewed: September 2026

This article is for general informational purposes only and does not constitute tax, legal, or accounting advice. For guidance specific to your situation, consult a qualified professional. TFR & Company Inc. is a CPA-led firm — schedule a consultation to discuss your needs.