San Francisco Tax Guide 2026: City Taxes, California Income Tax & Gross Receipts Tax

San Francisco is one of the most expensive cities in the United States — and one of the highest-taxed. California's 13.3% top income tax rate applies to all SF residents with taxable income above $1,000,000. Add the federal 37% rate and the 3.8% Net Investment Income Tax, and San Francisco's top earners face a combined marginal rate over 54%. For business owners, the SF Gross Receipts Tax adds a city-level levy on revenues. For property sellers, the SF Real Property Transfer Tax imposes up to 6% on the sale price. This guide covers every layer of tax affecting San Francisco residents, employees, business owners, and property holders.

Business Taxes in San Francisco: GRT, Payroll, and the Admin Burden

San Francisco has one of the most complex local business tax structures of any US city. Businesses must navigate the Gross Receipts Tax, potential Homelessness surtax, and registration requirements.

Who Pays the Gross Receipts Tax

Any business with SF gross receipts above $2,000,000 is subject to GRT. Below $2,000,000, businesses may still be subject to the minimum annual business registration fee ($105–$35,000 depending on receipts). Freelancers, sole proprietors, and single-member LLCs with SF-based clients must register as a business with the SF Office of the Treasurer & Tax Collector and file GRT returns if receipts exceed the threshold. Remote employees working from SF for out-of-SF employers generally do not owe GRT (they are employees, not businesses).

Apportionment for Multi-Location Businesses

Businesses with operations both in and outside SF apportion their gross receipts using a payroll-based formula: SF gross receipts = total gross receipts × (SF payroll ÷ total payroll). A software company with 40% of employees in SF applies 40% of total receipts to SF for GRT purposes. The apportionment rules are governed by SF Business and Tax Regulations Code Article 12-A-1.

Annual Filing and Payment

GRT returns are filed annually by February 28 for the prior calendar year. Businesses with expected GRT liability above $5,000 may need to make quarterly estimated payments. Registration renewal is due in May each year. Penalties for late filing: 5% per month up to 25%, plus interest.

Moving To or From San Francisco: Tax Planning Considerations

The decision to move to or from San Francisco has significant tax consequences given California's worldwide income taxation and aggressive domicile audits.

Establishing Non-California Domicile

California taxes residents on worldwide income. Leaving California requires establishing domicile in another state — this means more than just renting an apartment elsewhere. California's Franchise Tax Board looks at: where your home is (owned or rented, not just temporary), where your spouse and children live, where your business is conducted, where your social and club memberships are, where you vote. The FTB aggressively audits high-income departures, particularly when a large income event (stock sale, business sale, IPO) occurs shortly after departure. To successfully leave California: sell your CA home or lease it at arm's length, move your spouse and children, change all registrations (driver's license, voter, vehicle), and allow at least 12 months before the income event.

Part-Year California Resident

In the year you move to or from California, you file as a part-year resident. California income tax applies to: all California-source income for the full year, AND all worldwide income during the period of California residency. Example: you live in SF January–June, then move to Texas. You owe California income tax on your worldwide income for January–June plus any California-source income (CA rental property, CA employer income) for July–December.