For California small business owners organized as S corporations or partnerships, pass-through taxation creates unique complexities at both the federal and state levels. Owners of these entities often have W-2 wages, K-1 income distributions, and self-employment considerations — all on the same return. Finding a tax professional experienced with pass-through entities is important for avoiding missed deductions and compliance errors.
How Pass-Through Entities Work
S corporations and partnerships do not pay entity-level federal income tax (with some exceptions). Instead, income and losses pass through to individual owners, who report them on their personal returns via Schedule K-1. California broadly follows federal pass-through treatment but adds important differences:
- S corporations pay California’s 1.5% franchise tax on net income (minimum $800).
- Partnerships and LLCs taxed as partnerships pay the $800 minimum annual franchise tax plus an LLC fee based on gross receipts.
- California does not always conform to federal deductions, including some Section 179 expensing limits.
Common Issues That Require Expertise
- Reasonable compensation for S corp owner-employees: The IRS requires S corporation shareholder-employees who perform services to take a reasonable salary. Underpaying salary to avoid payroll taxes is a known audit trigger.
- Basis tracking: Shareholders and partners can only deduct losses to the extent of their basis in the entity. Tracking basis incorrectly can result in over-deducted losses or improper carryforwards.
- QBI deduction eligibility: The federal Qualified Business Income deduction under Section 199A may apply to pass-through income. California does not conform to this deduction, so state and federal tax results will differ.
What to Look for in a Professional
- Experience preparing both the entity return (Form 1120-S or Form 1065) and the owner’s personal return
- Familiarity with California franchise tax calculations for S corps and partnerships
- Ability to track and document basis for shareholders and partners
How to Find and Verify Help
Ask potential professionals how many S corporation or partnership clients they currently serve. Verify CPA licenses at dca.ca.gov/cba and Enrolled Agent credentials at irs.gov. The CalCPA referral directory can help identify CPAs with small business specialties.
Official sources referenced: IRS.gov, California Board of Accountancy (dca.ca.gov/cba), California Franchise Tax Board (ftb.ca.gov). Not reviewed by a credentialed tax professional.