An extension to file is not an extension to pay tax.
San Francisco's Annual Business Tax Return (covering the city's Gross Receipts Tax and related business taxes) is administered by the Office of the Treasurer & Tax Collector. An extension is not automatic and is not tied to the federal extension - a business must affirmatively submit an extension request. Payment of the current year's tax liability is still required by the original filing deadline; a request submitted without that payment is rejected and penalties apply. Because the current year's exact extended deadline and request process are set annually by the Treasurer's office, confirm the current filing calendar before relying on a specific date.
| Item | Detail |
|---|---|
| Form required | An extension request submitted through the Treasurer & Tax Collector's office (procedure set annually) |
| Automatic | No - not automatic, and not tied to a federal extension |
| Payment | Full payment of the current year's tax liability is required by the original filing deadline; a request without full payment is rejected |
| Authority | SF Office of the Treasurer & Tax Collector, Annual Business Tax Return extension guidance |