California S Corp Tax Calculator
Calculate your California Franchise Tax Board (FTB) liability, the mandatory $800 annual minimum fee, 1.5% net income tax, and net federal FICA savings for Golden State businesses.
This S-Corp calculation tool is engineered strictly for informational and comparative estimation purposes based on 2026 IRS federal tax brackets and FICA thresholds. It does not constitute formal accounting, legal, or certified CPA tax advice. Actual tax obligations depend on state franchise nexus, reasonable salary audit criteria, health insurance deductions, and individual business circumstances. Always consult a licensed Certified Public Accountant (CPA) or tax attorney prior to executing an S-Corp election (Form 2553).
California S-Corp Tax Rules & The $800 Franchise Tax
1. The $800 Annual Minimum Tax
Unlike most states where S-Corporations pay zero entity-level tax, California imposes an $800 annual minimum franchise tax to the California Franchise Tax Board (FTB), regardless of whether your business made a profit or operated at a loss.
2. The 1.5% Net Income Entity Tax
If your S-Corporation generates substantial net income, California charges a 1.5% tax on net income (or $800, whichever is greater). If net profit is $200,000, your entity tax is $3,000 ($200,000 × 1.5%).
3. AB 150 Pass-Through Entity (PTE) Elective Tax
California S-Corporations can elect the PTE tax (AB 150), allowing the business to pay state income tax at 9.3% and provide shareholders with an equivalent federal deduction, effectively bypassing the federal $10,000 SALT cap!
4. California S-Corp Breakeven Rule
Due to California's higher fees ($800 min + 1.5% + FTB Form 100S prep fees), financial planners recommend forming an S-Corp in California only once your net profit reliably reaches $80,000 to $90,000+.
California S-Corp Frequently Asked Questions
Under California law, corporations and LLCs formed in California are generally exempt from the $800 minimum franchise tax for their first tax year. However, starting in year two, the $800 minimum fee is mandatory.
A California S-Corporation must file California Form 100S (California S Corporation Franchise or Income Tax Return) with the FTB, alongside federal Form 1120-S with the IRS, due annually by March 15.