The Hedge | Brutal Honesty Over Hype Since 2008
California’s tax filing and payment obligations are numerous, multi-agency, and have specific deadlines that don’t align neatly with federal tax deadlines. Missing a California tax deadline triggers automatic penalties and interest that compound quickly. Understanding the California tax calendar — and building compliance deadlines into your business operations system — is foundational for any California business owner.
Quarterly Estimated Tax Payments
California individual income tax, including tax on pass-through business income reported on the owner’s personal return, is paid through quarterly estimated tax payments. California’s estimated tax payment schedule differs from the federal schedule: California estimates are due April 15 (40% of annual liability), June 15 (0%), September 15 (60%), and January 15 of the following year (0%). The absence of a second-quarter California payment and the larger percentage allocations to Q1 and Q3 catch many taxpayers off guard. Underpayment of California estimated taxes triggers an underpayment penalty even if the final return is filed and paid on time.
LLC Franchise Tax Payments
California LLCs must pay the $800 minimum franchise tax annually. For established LLCs, the franchise tax is due by the 15th day of the 4th month of the taxable year — April 15 for calendar-year LLCs. New LLCs face a specific payment schedule for their first two years that can require accelerated payments. The additional gross receipts-based LLC fee is also due by April 15. Failure to pay franchise tax on time results in a 5% per month late payment penalty (up to 25%) plus interest.
Payroll Tax Deposits and Returns
California payroll taxes — UI, ETT, SDI, and state income tax withholding — must be deposited and reported on a schedule determined by the employer’s payroll tax deposit frequency, which is assigned by the EDD based on prior year liability. Most California employers with regular payroll are required to deposit payroll taxes either semi-weekly or monthly, and must file quarterly DE 9 and DE 9C returns. Payroll tax deposits that are late by even one day trigger automatic penalties. Build payroll tax calendar compliance into your payroll processing system — don’t rely on remembering manually.
Sales Tax Filings
California sales tax (collected through the California Department of Tax and Fee Administration, CDTFA) is reported and remitted on a quarterly basis for most small businesses. Higher-volume businesses may have monthly filing requirements. Sales tax returns and payments are due the last day of the month following the close of the filing period. California’s sales tax rules for what is taxable, which exemptions apply, and how to source transactions for nexus purposes are complex enough that most California businesses with meaningful sales tax exposure benefit from dedicated sales tax software or a sales tax consultant.
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