1. Federal, State, and City Taxes Require Separate Review
Different agencies assess business income, retail sales, and wages. Tax treatment and operations determine jurisdiction.
Tax Agencies and Relevant Business Records
| Agency | Tax Matter | Key Records |
|---|---|---|
| IRS | Federal income and employment tax | Returns, Forms 941 |
| FTB | California income and franchise tax | State returns |
| CDTFA | Sales and use tax | Invoices, sales reports |
| EDD | State employment tax | Payroll records |
| SF Tax Collector | City business taxes | Local receipts, registration |
An LLC treated as disregarded for federal income tax may still owe California's LLC annual tax. For interstate nexus disputes, see state tax review.
City Registration May Apply without City Tax
Businesses generally must register within 30 days after commencing activity in the city, even without Gross Receipts Tax liability. A storefront is not essential. Review the start date, work locations, and services performed in the city. Registration renewal now accompanies annual business tax filings.
2. Local Receipts Depend on Business Activity and Sourcing
Proposition M changed the city's business taxes in 2025. Local tax depends on receipts attributable to the city, not federal taxable income.
Activity Categories and Sales Allocation
Of the city's seven activity categories, Categories 1, 4, 5, and 6 generally use 75% allocation and 25% payroll-based apportionment. Categories 2, 3, and 7 rely on local real property. Contracts, customer locations, and payroll records help establish the correct sourcing.
The $5 Million Exemption and Its Exceptions
For tax year 2025, the Gross Receipts Tax exemption generally covered persons or combined groups with up to $5 million in city receipts. Residential real estate lessors are excluded, and later-year thresholds are adjusted by law. Combined-group receipts are tested together, not entity by entity. Administrative offices and other city taxes follow separate rules. Exemption does not necessarily eliminate registration or filing.
Records That Support a Different Assessment
Keep invoices, allocation worksheets, payroll records, and registration history. Test the activity category, customer location, and combined-group calculation. Federal disputes over deposits and deductions warrant IRS audit record reconciliation.
3. Tax Notices Establish Different Objection Procedures
An audit request differs from an assessment. The notice, date, disputed period, and delivery method determine the response.
IRS and California Filing Deadlines
| Notice | General Deadline | Response |
|---|---|---|
| IRS statutory deficiency | 90 days, or 150 in qualifying overseas cases | U.S. Tax Court petition |
| FTB proposed assessment | 60 days | FTB protest |
| FTB Notice of Action | 30 days | Office of Tax Appeals |
| CDTFA sales tax determination | 30 days | Redetermination petition |
| SF tax determination | 30 days, or 15 for jeopardy cases | City Tax Collector petition |
Mailing and service rules vary. An IRS audit letter does not itself trigger Tax Court's petition deadline. Federal examinations may require IRS audit defense.
City Petitions Must State Specific Grounds
Under Business and Tax Regulations Code § 6.13-1, city determinations generally permit 30 days after service to petition, or 15 for jeopardy determinations. A verified petition must specify grounds and authenticate records. Omitted grounds are waived in later court proceedings. The Tax Collector may deny incomplete petitions or request records due within 30 days. A timely petition may also request an oral hearing.
Refund Claims before Superior Court
Sections 6.13-5 and 6.15-3 generally require a city redetermination petition, payment, and a refund claim to the Controller before litigation. A denied claim may proceed in San Francisco Superior Court, subject to deadlines. Eligible federal Tax Court deficiency cases generally allow prepayment review.
4. Practical Pitfalls and Owner Liability
Late filings, unsupported estimates, and unpaid withheld taxes can expand exposure. LLC status alone does not resolve personal liability.
Federal Withholding and California Sales Tax
Internal Revenue Code § 6672 may penalize a responsible person who willfully fails to remit withheld federal taxes. It excludes the employer's payroll tax share. Actual authority matters, not just title.
Under California Revenue and Taxation Code § 6829, termination, dissolution, or abandonment may expose a person to unpaid sales or use tax if the business collected sales tax reimbursement or incurred qualifying use tax, and that person controlled payment and willfully failed to pay. Ownership alone is insufficient. Employment tax issues warrant a payroll tax compliance review.
Records, Statements, and Privilege
Preserve original tax returns, invoices, payroll records, and agency correspondence. Track submission dates and distinguish estimates from verified figures before responding to an audit request. An attorney can assess disclosure obligations, disputed records, and statements that may affect the business's tax liability.
Confidential communications made to obtain legal advice may qualify for attorney-client privilege. However, existing business records do not become privileged merely because they are given to an attorney. Sharing protected communications with third parties may also waive that privilege.
5. Frequently Asked Questions
How Much Does a Small Business Tax Lawyer Cost in California?
Fees depend on tax periods, records, and whether protests or hearings are involved. Clarify the engagement scope and appeal costs.
Can a Tax Lawyer Negotiate Small Business Tax Debt With the IRS?
An attorney may assess installment agreements or an offer in compromise based on eligibility, compliance, and finances. A collection agreement does not cancel the underlying tax.
When Does a Business Need a Tax Attorney Instead of a CPA?
A CPA handles accounting and returns. An attorney may address formal objections, personal liability, or litigation. Their work may complement each other.
13 Nov, 2026
