1. City Payroll Tax Exposure Depends on the Tax Year
The date on a city tax notice changes the governing rules. A business must distinguish the former payroll tax from the Administrative Office Tax (AOT), which applies only to qualifying groups.
Earlier Tax Years Remain Relevant
Proposition F repealed the general Payroll Expense Tax effective January 1, 2021, but the repeal did not eliminate liabilities from earlier years. A notice for 2020 or before must be reviewed under the rates, exemptions, and limitations periods applicable to that tax year. Check the notice against original returns, payroll records, payment confirmations, and amended filings. These records help distinguish unpaid taxes from reporting or allocation errors. Most current city business taxes instead follow a gross receipts framework, so applying today's rules to an earlier payroll-tax assessment could lead to an incorrect response.
Aot Applies to Certain Large Administrative Offices
Under Business and Tax Regulations Code § 953.8, AOT generally requires over 50% of combined city payroll expense to support internal administrative services, more than 1,000 U.S. .mployees across related entities, and combined federal gross receipts exceeding $1 billion. Qualifying services exclude sales and direct customer support. From 2025, changes into or out of AOT classification generally require meeting or failing the statutory tests across three tax years. For 2025 and 2026, AOT is 1.47% of city-attributable payroll expense, with a separate 1.5% Homelessness Administrative Office Tax. AOT replaces the ordinary city gross receipts tax for qualifying businesses, making classification relevant to a state and local tax review.
2. The Taxing Agency Determines the Applicable Filing
The IRS, California Employment Development Department (EDD), and city Treasurer & Tax Collector use different forms and procedures.
Federal and California Returns Serve Separate Purposes
IRS Form 941 reports federal income tax withholding and Social Security and Medicare taxes. California Forms DE 9 and DE 9C cover state employment-tax reporting, including unemployment insurance, employment training tax, disability insurance, and personal income tax withholding.
A return showing the correct wages does not prove the tax was deposited. Compare quarterly filings with payment confirmations before amending them. Changing Form 941 does not correct an EDD return. Broader payroll tax compliance issues, including routine withholding and deposit schedules, require their own review.
City Notices Raise Business-Tax Questions
The Treasurer & Tax Collector may question AOT classification, the group of related entities, or the payroll expense attributed to work in the city. AOT belongs to the city's annual business tax return, not a federal or EDD quarterly return.
An audit request seeks information. A deficiency determination asserts liability and may start a formal petition period. Check the document type, tax year, service date, and stated grounds before responding.
3. Correction and Appeal Deadlines Follow Different Rules

A correction, assessment petition, and refund claim have different rules. Deadlines follow the notice and taxing authority.
IRS Corrections and Trust Fund Recovery Penalties
Form 941-X can correct errors on a previously filed Form 941, subject to adjustment and refund rules. Prior-year corrections to federal income tax withholding are generally limited to administrative errors and certain cases involving IRC § 3509. They do not generally permit corrections to prior-year withholding calculated using the wrong tax table.
An IRS proposal to impose personal liability under IRC § 6672 follows another track. Letter 1153 ordinarily allows 60 days to protest after mailing or delivery, or 75 days when addressed outside the United States. Responsibility and willfulness are examined in this business tax attorney article.
Edd Petitions Go to the Appeals Board
An employer disputing an EDD tax assessment generally files a written petition with the California Unemployment Insurance Appeals Board (CUIAB). The period is ordinarily 30 calendar days from mailing of the notice, but 10 days for a jeopardy assessment. CUIAB does not currently accept online tax petitions.
Identify the EDD employer account, disputed periods, and grounds for disagreement. Attach the notice and evidence for those quarters.
City Redetermination Has Its Own Deadline
Business and Tax Regulations Code § 6.13-1 generally gives 30 days after service of a city determination to petition the Tax Collector. Section 6.12-5 gives 15 days for a jeopardy determination. A petition must verify specific grounds and supporting records; grounds left out may be waived. A jeopardy petition does not itself stop collection.
For a city tax refund suit, § 6.15-3 generally requires payment, any applicable redetermination petition, and a refund claim to the Controller before proceedings in Superior Court. An EDD petition does not satisfy these city requirements.
4. Evidence Must Match the Tax and Period in Dispute
The records must explain the wages, payments, activities, and dates behind the asserted liability. AOT classification and federal deposit disputes require different proof.
Reconcile Returns and Payment Records
Compare Forms 941, DE 9, and DE 9C with payroll registers, W-2 records, bank debits, and payment confirmations. Sort them by period. Keep notices, mailing evidence, and agency correspondence to establish deadlines.
For proposed individual liability, preserve payment authority records and evidence of when the person learned of unpaid taxes. A title alone does not prove responsibility.
Document Aot Status and City Payroll Allocation
Review three years of federal receipts, U.S. .eadcount, organizational charts, staff duties, and work locations to establish administrative-office status.
Section 953.8 defines payroll expense broadly. Bonuses, commissions, equity compensation, and certain owner payments may count, including compensation attributable to work partly performed in the city. Reconcile that allocation with work-location records rather than treating all company payroll as taxable in San Francisco. That evidence separates a classification dispute from an allocation error.
13 Nov, 2026

