Bespoke CPA Advisory for “The Birthplace of Biotechnology”
Recognized globally as the center of life science innovation, South San Francisco houses the world’s largest biotechnology cluster—anchored by industry giants like Genentech alongside hundreds of VC-backed clinical research startups, pharmaceutical labs, and industrial suppliers. Navigating early-stage research grants, Section 174 amortization, and high-bracket executive equity awards requires specialized tax execution.
From restructuring clinical ventures via our LLC to S-Corp tax conversion hub and deploying the California AB 150 PTE tax election to overriding brokerage $0 basis reporting errors on Form 1099-B, we help South San Francisco taxpayers preserve their wealth. We serve founders, principal scientists, and executives across South San Francisco, San Bruno, Foster City, and San Francisco using targeted RSU cost basis adjustments, ISO AMT tax modeling, and ESPP disposition strategies.
The SSF Biotech ISO Exercise & Real Estate Reinvestment Play
- The Event: A Principal Scientist in South San Francisco exercises $350,000 in Incentive Stock Options (ISOs) while earning $260,000 in W-2 and consulting income.
- The Tax Threat: Holding the unvested stock triggers a massive Alternative Minimum Tax (AMT) paper liability without liquid cash flow to pay it, combined with the $10,000 federal SALT cap.
- Moontree CPA Fix: We model exact ISO cross-over thresholds to prevent catastrophic AMT spikes and execute the CA AB 150 PTE election for consulting earnings to bypass the SALT limit.
- The Real Estate Shelter: We pair active revenue with an engineering-based cost segregation study on Peninsula rental property to generate accelerated paper depreciation write-offs.
Full-Service CPA Tax Solutions for South San Francisco
Comprehensive life science tax advisory, ISO AMT management, and real estate wealth strategies.
Biotech Executive Equity & ISO AMT
We manage complex high-income 1040 returns for biotech directors, overriding brokerage 1099-B $0 basis errors, modeling ISO AMT exercise windows, and managing ESPP dispositions during individual tax preparation.
Life Science Startup & S-Corp Advisory
For SSF clinical founders, lab consultancies, and commercial suppliers, we manage corporate tax filings (1120, 1120-S), optimize officer compensation, and deploy California AB 150 PTE elections.
Real Estate Rental & REPS Strategy
Investing in Peninsula real estate? We pair residential and commercial property acquisitions with Real Estate Professional Status (REPS) and engineering cost segregation studies.
Property Transfers & 1031 Exchanges
Transferring family property? We coordinate California Prop 19 reassessment exemptions and structure tax-deferred 1031 property exchanges for SSF property owners.
Serving South San Francisco, Peninsula & Regional Tech Corridors
We deliver specialized CPA tax planning across major Northern California business and technology hubs. Explore our service locations:
Frequently Asked Questions for South San Francisco Taxpayers
How does IRC Section 174 amortization affect South San Francisco biotech startups?
Under tax law changes, domestic research and experimental (R&D) expenses can no longer be immediately deducted in the year incurred. Instead, biotech firms must amortize domestic R&D costs over 5 years (15 years for foreign R&D). This creates taxable phantom income for early-stage life science companies even before achieving commercial revenue. We help SSF lab ventures structure R&D credits to offset this burden.
How is the City of South San Francisco Business License Tax calculated?
Under City of South San Francisco Municipal Code Chapter 6.04, any individual, partnership, or corporation conducting business or research in SSF must hold an active City Business License. Annual taxes are determined based on gross receipts generated locally or employee headcount, depending on whether the entity operates in manufacturing, research, retail, or professional services.
Why do stock brokerages report $0 cost basis on biotech equity sales for SSF employees?
Federal tax rules prohibit custodians from automatically adjusting cost basis on Form 1099-B for non-statutory equity awards. Brokerages report gross sale proceeds and leave basis blank or at $0. We reconcile your Supplemental Statements on IRS Form 8949 to reflect fair market value at vest, preventing double taxation on W-2 equity income.
Optimize Your South San Francisco Tax Strategy Today
Schedule a 1-on-1 strategy session with Brandy Phuong, CPA to review your biotech venture, executive stock equity, or real estate portfolio and protect your wealth.
Schedule Your South San Francisco CPA Strategy Session →