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The normalization of remote work has created a specific California tax compliance trap that many out-of-state employers discover too late: hiring a single California-based remote employee can create California tax nexus for an out-of-state company — triggering franchise tax registration and payment obligations, payroll tax withholding and reporting requirements, and potential income tax liability — all for a company that intended to have no California presence at all.
How One Employee Creates California Nexus
California’s “doing business in California” standard is triggered when an out-of-state company has employees working in California, regardless of whether the company has offices, property, or other physical presence in the state. A remote employee who works from their California home is, from the FTB’s perspective, conducting the company’s business in California. This creates California franchise tax registration and payment obligations for the employer — including the $800 minimum franchise tax — plus EDD payroll tax registration and withholding obligations, and potentially income tax obligations depending on the nature of the California-source income generated.
The Payroll Tax Obligations
An out-of-state employer with a California remote employee must register with California’s Employment Development Department (EDD) and withhold California state income tax from the employee’s wages, make California SDI (State Disability Insurance) deductions, pay California UI (Unemployment Insurance) employer taxes, and file quarterly California payroll tax returns. These obligations exist from the employee’s first day of work in California — there is no grace period. Employers who discover months or years later that they should have been withholding California taxes face retroactive obligations plus penalties and interest.
The Workers’ Compensation Obligation
California requires all employers with California employees to carry California workers’ compensation insurance — even if the employer is incorporated in another state and the employee is the only California worker. The employer must obtain a California workers’ compensation policy and comply with California’s workers’ compensation reporting and claims handling requirements. Failure to maintain California workers’ compensation coverage is a criminal offense in California, not just a civil compliance failure.
What Out-of-State Employers Should Do
Before hiring a California remote employee, any out-of-state employer should: register with the California Secretary of State as a foreign entity doing business in California, register with the EDD for payroll tax purposes, obtain California workers’ compensation insurance, consult with a California employment law attorney about California-specific employment law obligations that apply to the California employee even if the company’s employment policies are based on another state’s law. The one-time setup cost of California compliance is manageable. The retroactive penalty and interest cost of discovering non-compliance after years of ignoring these obligations is not.
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