Ultimate Guide to FTB Audits: What California Taxpayers Need to Know

If you’ve received a notice from the Franchise Tax Board (FTB) in California, you’re not alone — but you are under review. FTB audits can be triggered by unfiled returns, inconsistencies in your income, deductions that raise red flags, or even federal audit referrals. And unlike the IRS, California’s FTB has its own aggressive methods and timelines.

In this guide, we’ll break down everything you need to know about FTB audits, including:

• How they start
  
  
• What documents you’ll need
  
  
• How to respond
  
  
• What happens if you ignore it
  
  
• And how to protect yourself or your business

Why Did I Get Selected for an FTB Audit?

The FTB audits both individuals and businesses in California. You may be selected for a variety of reasons, including:

• A mismatch between your California and federal returns
  
  
• A referral from the IRS after an audit
  
  
• High-value deductions (like mortgage interest, charitable giving, or business expenses)
  
  
• Income underreporting
  
  
• Unfiled returns or late filings
  
  
• Prior history of adjustments or penalties
  
  
• Cash-intensive businesses with low reported revenue
  
  

FTB also uses sophisticated data-matching tools to compare your return against DMV records, 1099s, real estate transfers, and more.

What Does the FTB Look at During an Audit?

The scope of an audit can vary. Some are narrow — covering a single deduction — while others expand into multiple years and income streams.



Common areas of review include:

• Business income and expense documentation (especially for sole proprietors or LLCs)
  
  
• Rental property income and expenses
  
  
• Real estate sales and 1031 exchanges
  
  
• Schedule C deductions
  
  
• Flow-through income from S-Corps or partnerships
  
  
• Out-of-state income or residency issues
  
  
• Estimated tax payments or withholdings
  
  
• Capital gains from stock or crypto sales
  

What Records Should I Provide?

You’ll typically receive an initial information document request (IDR) from the auditor. This may include:



• Bank statements
  
  
• Credit card statements
  
  
• Copies of invoices or receipts
  
  
• Mileage logs
  
  
• Lease agreements
  
  
• Copies of prior tax returns
  
  
• Proof of business purpose for deductions
  
  
• Partnership or S-Corp K-1s
  
  
• Proof of residency (if there's a domicile or sourcing issue)
  
  

Do not hand over everything blindly. You have a right to respond strategically — and with help from a qualified professional.

Can I Dispute the FTB’s Findings?

Yes. If the auditor proposes adjustments you disagree with, you’ll have options:



1. Initial protest: You can file a written protest within 60 days of receiving the Notice of Proposed Assessment (NPA).
   
   
2. Administrative appeal: If unresolved, you can file an appeal with the Office of Tax Appeals (OTA).
   
   
3. Settlement: You may be able to negotiate a settlement with the FTB Settlement Bureau.
   
   
4. Payment plan or Offer in Compromise: If you owe money, there are resolution options available.
   

What Happens If You Ignore an FTB Audit?

Failing to respond can lead to:



• An audit conducted without your input, based on estimates
  
  
• A Notice of Proposed Assessment (NPA) that becomes final after 60 days
  
  
• Full liability enforced through:
  
  
• Wage garnishment
  
  
• Bank levies
  
  
• Franchise suspension (for business entities)
  
  
• Tax liens
  
  

The FTB does not need a court order to begin aggressive collections once an assessment is final.

How Is an FTB Audit Different from an IRS Audit?

How We Help at Boulanger CPA

We don’t just respond to the FTB — we lead the defense. Our CPA-led audit representation includes:



• Reviewing your audit notice and transcript history
  
  
• Strategically limiting the audit scope
  
  
• Assembling records in your favor
  
  
• Identifying areas where the FTB overstepped
  
  
• Filing protests or appeals, if necessary
  
  
• Negotiating settlements or payment resolutions
  
  
• Ensuring that IRS findings don’t unfairly inflate your state liability
  

Related Help & Resources

• FTB Audit Triggers: Why You Got Selected
  
  
• FTB Substitute Return – What It Means and How to Respond
  
  
• FTB vs. IRS Audits – Key Differences Explained
  
  
• California Tax Enforcement Hub
  
  
• FTB Tax Relief Services in Orange County
  

FAQ – Frequently Asked Questions

📣 About the Author

Marc Boulanger, CPA is the founder of Boulanger CPA and Consulting PC, a boutique tax resolution firm based in Orange County, California and trusted by high-income individuals and business owners across Southern California.

He is the author of Defend What’s Yours: A California Taxpayer’s Guide to Beating the IRS and FTB at Their Own Game, available now on Amazon. The book offers a step-by-step plan for resolving IRS and FTB tax debt without losing your business, your home, or your peace of mind.

With over a decade of experience resolving high-stakes IRS and State tax matters, Marc brings strategic insight to complex cases involving wage garnishments, bank levies, unfiled returns, and six-figure tax debts. He is known for helping clients reduce or eliminate tax liabilities through expertly negotiated settlements and compliance plans.

Marc is a Certified Public Accountant licensed in California and Oklahoma and holds the designation of Certified Tax Representation Consultant. He is a member of the American Society of Tax Problem Solvers (ASTPS) — the national organization founded by the educators and practitioners who have trained thousands of CPAs, EAs, and tax attorneys in IRS representation strategy.

Every case is handled with discretion, proven methodology, and direct CPA-led representation — not call center scripts.

📍 Learn more at www.orangecounty.cpa or call (657) 218-5700.