Unsure where you owe sales or use tax
Run Your Nexus Risk CheckBusinesses operating in California may be subject to a sales tax audit conducted by the CDTFA. Sales tax audits are used by state tax agencies to verify whether businesses are properly collecting, reporting, and remitting sales tax. During an audit, tax authorities review historical records to determine whether the correct amount of tax has been paid. Understanding the audit process in California helps businesses prepare documentation, avoid penalties, and maintain compliance with state tax laws. Businesses unsure whether their activities have triggered tax obligations should first evaluate nexus exposure.
Economic Nexus CalculatorSales tax audits may be triggered for several reasons.
Common audit triggers include: nexus detection
State tax authorities often analyze tax return patterns, sales activity, and discrepancies between reported revenue and tax filings. Businesses operating across multiple states may face higher audit risk if tax obligations are not tracked properly.
The audit lookback period determines how far back the state tax authority may examine financial records.
Typical audit lookback period in California: 8 years
However, the lookback period may be extended if the state determines that fraud or intentional tax avoidance occurred.
During a sales tax audit, the CDTFA may review several types of business records.
Typical documents reviewed include:
The audit process may include: field audit
Businesses should maintain accurate records to ensure they can respond effectively during an audit.
If an audit determines that sales tax liabilities were underreported or unpaid, the state may assess penalties and interest.
Typical penalty rate: 10% penalty
Penalties may apply to:
More details about penalties are explained here: Sales Tax Penalties
Economic nexus laws allow states to require tax collection once businesses exceed certain activity thresholds.
Typical threshold: $500,000 revenue
Businesses that exceed these thresholds but fail to register for sales tax may face audit risk.
More information about nexus rules is available here: Economic Nexus by State
Businesses can reduce audit risk by maintaining strong compliance practices.
Recommended practices include:
Companies operating across multiple states often rely on automation tools to monitor compliance obligations. Many states use rolling evaluation. See Economic Nexus Thresholds by State for details.
TaxMap helps businesses analyze multi-state sales activity and determine where tax obligations may exist.
The platform helps companies:
Businesses can estimate exposure using the economic nexus calculator.
Check Your Economic Nexus ExposureTaxMap helps businesses identify sales tax exposure across states and determine where nexus obligations may exist.