Can You Negotiate a CDTFA Audit Balance?

Marc Boulanger • June 9, 2025

If your California sales tax audit just ended — or you’re in the thick of one — you may be staring at a massive assessment from the California Department of Tax and Fee Administration (CDTFA). The good news? You may not have to pay the full amount.


In many cases, the CDTFA overestimates what you owe based on assumptions, flawed sampling, or missing records. You can negotiate a lower balance — if you know how to challenge the audit results properly.


Here’s how the process works.


Why CDTFA Assessments Are Often Too High


The CDTFA uses aggressive audit methods to project liability, especially when records are incomplete. This often includes:


  • Markup analysis based on your industry (even if your costs differ)
  • Observation days that don’t reflect typical activity
  • Sampling that applies a small set of records to multiple years
  • Estimated taxable sales based on purchases or inventory


These shortcuts can produce assessments that don’t reflect your actual business activity — and you have the right to dispute them.


Read more: What Triggers a CDTFA Sales Tax Audit In California?


How to Dispute an Audit Balance


You can challenge a CDTFA audit by:


  • Filing a petition for redetermination (within 30 days of the Notice of Determination)
  • Providing detailed records and rebutting audit assumptions
  • Arguing for lower error rates or more accurate sampling
  • Requesting an appeals conference with a CDTFA supervisor


Most businesses don’t know how to argue these points — or give up because the process seems too complex. That’s where experienced representation makes a huge difference.


Learn More: How To Respond to a CDTFA Audit Letter in California


Common CDTFA Audit Disputes

CDTFA Claim Our Response Strategy
Markup rate too high Show actual cost structure + vendor docs
Incomplete cash records Provide supplemental data or reconciliations
Sample month not representative Dispute selection and propose alternative periods
Assumed all sales were taxable Prove exempt sales with invoices or resale certs


Can You Settle With an Offer in Compromise?


If you truly can’t afford to pay, the CDTFA does have an Offer in Compromise (OIC) program — separate from the IRS. You may qualify if:


  • You’ve closed your business or sold it
  • Your income and assets are limited
  • You don’t have the ability to full-pay within a reasonable period


An accepted OIC can reduce your liability dramatically, but the application process is complex. We help clients determine if they qualify and prepare strong OIC packages.


Bottom Line: Don’t Just Accept the Numbers


You do not have to accept a CDTFA audit bill at face value. There are often legal, factual, and procedural grounds to reduce what you owe — but you must act fast and follow the proper channels.


Schedule a CDTFA Audit Review Consultation


At Boulanger CPA and Consulting PC, we help California business owners fight back against inflated sales tax audit results — and negotiate smarter solutions.


📍 Based in Orange County — Serving All of California
Call: 657-218-5700
Email: marc@boulangercpa.com
Book a CDTFA Audit Review Today



Want more info? Visit our CDTFA Audit Defense page to learn how we help reduce liabilities after an audit.


📣 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.


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