A company opens its first California office: which registrations and taxes follow?
Edvin Givargis Published 8 minute read
The short answer
Five workstreams open at once, each with its own agency. The company must qualify or register with the Secretary of State and begin filing Statements of Information; it becomes a California franchise or income tax filer with the Franchise Tax Board; it must register as an employer with the Employment Development Department within fifteen days of paying more than $100 of California wages in a calendar quarter; if it sells tangible personal property, it needs a seller's permit from the California Department of Tax and Fee Administration and must file sales and use tax returns even if every sale is an exempt sale for resale; and it should expect use tax on equipment and supplies bought from out-of-state vendors, along with whatever business license the city where the office sits requires. None of these registrations triggers the others automatically. Each must be done on its own.
The trigger: an office and an employee are classic doing business
California's doing business standard needs very little. A corporation is doing business in the state if it actively engages in any transaction for financial or pecuniary gain (Rev. and Tax. Code section 23101(a)), or if its California sales, property, or payroll exceed the indexed factor presence thresholds (Rev. and Tax. Code section 23101(b); for 2025, $757,070 of sales, $75,707 of property, and $75,707 of payroll, each measured against the lower of the dollar amount or 25 percent of the company's total). A leased office and a full-time employee working in the state satisfy subdivision (a) without any arithmetic, and the payroll of even one professional employee will usually clear the subdivision (b) payroll threshold on its own. The analysis does not depend on where the company is incorporated, where its customers are, or whether the office generates revenue directly. A marketing and market development office with no sales function still counts.
One federal overlay deserves a mention before the checklist. Public Law 86-272 bars a state from imposing a net income tax on an out-of-state company whose only in-state activity is soliciting orders for sales of tangible personal property that are approved and shipped from outside the state. The protection is real but narrow: it covers solicitation and nothing else, it does not cover services or intangibles, and market development activities beyond soliciting orders typically fall outside it. It also does not bar the California minimum franchise tax, which is not measured by net income. A company counting on Public Law 86-272 to neutralize a new California office should have that position examined closely, because an office whose staff do anything beyond pure solicitation, including the customer support, supply chain, and product work that offices naturally accrete, loses the protection for the whole company.
Franchise Tax Board: the return and the minimum tax
A corporation doing business in California must file Form 100 (or Form 100W for a water's edge filer) and pay the greater of the measured franchise tax at 8.84 percent of California-source net income or the $800 minimum franchise tax (Rev. and Tax. Code sections 23151 and 23153). A corporation's first taxable year in the state is exempt from the minimum tax and pays only the measured tax for that year. If the company already files in California as part of a combined group, the new office changes apportionment rather than creating a new filer, and payroll and property in California will begin to matter in ways a pure sales presence did not. Estimated tax obligations begin with the first year, and a company that waits for the first notice before filing has usually accrued penalties on top of the tax.
An LLC that opens the office instead of a corporation faces the parallel regime: the $800 annual tax, the gross-receipts-based LLC fee where receipts are high enough, and Form 568, with the added wrinkle that a disregarded LLC's activities are attributed to its owner, whose own filing obligation follows. The related article on nexus from owning a disregarded LLC covers that chain.
Secretary of State: qualification and the Statement of Information
An out-of-state corporation transacting intrastate business must qualify with the California Secretary of State before doing so, and an out-of-state LLC must register (Corp. Code sections 2105 and 17708.02). Qualification is a one-time filing, but it starts a recurring obligation that is easy to lose track of precisely because it is small: the Statement of Information. A stock corporation files annually, within the six-month window ending with its registration anniversary month, and pays $25, comprising a $20 filing fee and a $5 disclosure fee. An LLC files every two years at $20. The statement itself is trivial, listing officers, directors or managers, addresses, and the agent for service of process.
The penalty structure is what makes the item worth a calendar entry. Miss the filing and the Secretary of State certifies the delinquency to the Franchise Tax Board, which assesses a $250 penalty (Rev. and Tax. Code section 19141), and continued noncompliance leads to suspension or forfeiture of the entity's rights and powers in California. A suspended entity cannot enforce its contracts in California courts, loses its name protection, and can find a financing or a closing held up by a status check. For a $20 or $25 filing, the downside is disproportionate, which is the point.
Employment Development Department: payroll registration in fifteen days
Relocating an employee into California makes the company a California employer. Registration with the Employment Development Department is required within fifteen days of paying more than $100 in wages in a calendar quarter, which for any real salary means the clock starts with the first payroll after the move. Registration brings the full payroll tax set: unemployment insurance and employment training tax on the employer, state disability insurance withheld from the employee, and California personal income tax withholding. The employee's own tax posture changes too, and the employer's withholding must follow the employee's new residency from the relocation date, not from the next calendar year. Companies that leave a relocated employee on the old state's withholding for a transition period are creating an amended-return project for the employee and an exposure for themselves.
Sales and use tax: the permit is required even when every sale is exempt
If the company sells tangible personal property, the new office is a place of business in California and a seller's permit from the California Department of Tax and Fee Administration is required before sales are made. The permit is free. The obligation that surprises companies is the return filing: a seller whose California sales are entirely exempt sales for resale still must hold the permit, collect and retain timely resale certificates from its customers, and file returns reporting the sales as exempt. Resale certificates are the audit currency here; a seller without a certificate on file for an exempt-claimed sale owns the tax if the exemption fails.
Use tax runs in the other direction and applies regardless of what the company sells. Equipment, furniture, computers, and consumable supplies purchased for the office's own use from out-of-state vendors that did not collect California tax carry a self-assessed use tax obligation at the same rate as sales tax. Companies whose vendors are national usually find most purchases already taxed at the point of sale; the exposure accumulates in the gaps, and an office fit-out sourced from out-of-state vendors is a classic first-audit adjustment.
The local layer
Cities and counties add their own requirements, most commonly a business license or business tax registration for any office within city limits, measured variously by gross receipts, payroll, or flat fee. Some cities also impose payroll or gross receipts taxes with real rates rather than nominal ones. The local layer does not follow from any state registration and has to be checked city by city for wherever the office actually sits.
Practice notes
The recurring failure mode is sequencing, not analysis. Each item on this checklist is individually well known, but they belong to five different agencies, and the company's outside providers each tend to own only one of them: the registered agent handles the Secretary of State, the payroll provider handles the Employment Development Department, the return preparer handles the Franchise Tax Board, and nobody handles the seller's permit or the city license unless someone assigns them. A one-page opening memo listing every registration, its agency, its deadline, and its owner prevents essentially all of the penalties in this area. Two clocks deserve particular respect: the fifteen-day Employment Development Department registration, which is the shortest, and the first franchise tax return, which silently sets elections, including water's edge for a company with foreign affiliates, that bind later years. And the Statement of Information, the smallest item on the list, should go on a permanent calendar the day the qualification is filed, because it is the one obligation here with no natural annual event to remind anyone it exists.
This article states the law as of September 14, 2026
Statutes, rates, thresholds, and agency practice change, and a different set of facts can change the answer. Before acting on anything discussed above, contact G&G State Tax Group to confirm what has changed since this was written and how the rules apply to a specific situation.
G&G State Tax Group, LLC is a state and local tax advisory firm. The firm provides state and local tax consulting and representation in state and local tax controversies. G&G does not prepare or file tax returns, perform attest services, or provide bookkeeping, and is not a CPA firm.