Avalara 94105 Sales Tax Rate & Address Lookup Guide (San Francisco, CA)
📍 94105 Tax Rate Quick Facts:
- Total Combined Sales Tax: 8.625% in San Francisco, CA (ZIP 94105).
- California State Tax: 6.00%
- San Francisco County Tax: 0.25%
- Local Special District Taxes: 2.375%
- Calculate exact sales tax with our free Avalara Sales Tax Calculator.
ZIP code 94105 covers the bustling Financial District, South Beach, and Salesforce Tower area in downtown San Francisco, California. For e-commerce retailers, SaaS companies, and physical storefronts, charging accurate sales tax is legally required to avoid state audit penalties.
ZIP Code 94105 Sales Tax Rate Breakdown (San Francisco)
California operates on a composite sales tax structure combining baseline state minimums with local voter-approved district ballot measures:
| Jurisdiction Level | Taxing Authority | Rate Percentage |
|---|---|---|
| State of California | Base State Sales & Use Tax | 6.000% |
| City & County of San Francisco | Local County General Fund | 0.250% |
| Special District Taxes | BART Transit & Local Transportation Measures | 2.375% |
| Total Combined 94105 Rate | Aggregate Destination Rate | 8.625% |
How Avalara AvaTax Computes Destination-Based Sales Tax
Avalara uses rooftop geolocation (street address + ZIP+4) rather than broad 5-digit ZIP codes because district tax boundaries often cut directly through the middle of streets. For ZIP 94105, transactions shipped to commercial addresses along Mission St or Folsom St automatically receive the verified 8.625% composite rate.
Reverse Sales Tax Math: Extracting Pre-Tax Price
If you have an all-inclusive receipt total (such as $108.63) and need to isolate the pre-tax item amount and tax collected:
Pre-Tax Base Amount = Total Receipt Amount ÷ (1 + Tax Rate)
Pre-Tax Amount = $108.63 ÷ (1 + 0.08625) = $100.00
Sales Tax Paid = $108.63 - $100.00 = $8.63California Economic Nexus & Marketplace Seller Rules
Under California AB 147 (post-Wayfair legislation), out-of-state remote sellers must collect sales tax once they exceed $500,000 in total gross sales delivered into California within the current or preceding calendar year.
Free Online Avalara Sales Tax Calculator Tool
Lookup any US zip code, calculate itemized sales tax, and determine reverse tax math with our free Avalara Sales Tax Calculator.
David is a Certified Public Accountant (CPA) with over 14 years of corporate tax, loan amortization modeling, and merchant processing cost accounting experience.
