Short answer
Printing a California address on your invoices, your website, and your bank paperwork is not by itself what California counts as doing business. Two different statutes are in play, one behind the $800 franchise tax and one behind the Secretary of State filing, and neither of them turns on which address you use. What they ask about is where you and your work actually are.
Key takeaways
- Using an address in a state, owing that state's tax, and registering with its Secretary of State are three separate events. The address is something you write down. The other two come from different statutes with different tests, and neither test turns on your address.
- The $800 California minimum tax follows Revenue and Taxation Code section 23101. It reaches you if you actively engage in transactions for gain in California, if you are organized or commercially domiciled there, or if your California sales, property, or payroll exceed the lesser of the published amount or 25 percent of your total.
- Registration with the Secretary of State follows the Corporations Code instead, and turns on transacting intrastate business. That code expressly excludes transacting business in interstate commerce, so the tax duty and the filing duty can land on different companies.
- The dollar thresholds are not a safe harbor. In Appeal of Metro Mortgage Group, LLC, the Franchise Tax Board conceded the company was under the payroll threshold and still won on the activity test, over one part-time employee paid $121. That decision is nonprecedential, so it shows how the FTB approaches these disputes rather than setting a rule.
- If you live in California and run the company from there, being commercially domiciled in California is itself one of the listed conditions, so a Delaware filing and an out-of-state address do not change the tax answer.
- A corporation that incorporates or qualifies in California is exempt from the minimum tax for its first taxable year under section 23153(f), and that includes a Delaware corporation registering here. The LLC version of that exemption ended for entities formed on or after January 1, 2024.
Before you start
- Write down where you physically work, where any employees sit, who is selling for you as an agent or contractor, and where your property is. Those facts, not your mailing address, decide both questions.
- If you formed a corporation rather than an LLC, check which method your Delaware franchise tax is being calculated under, because the two methods can produce very different bills for the same company.
- Separate the two costs in your head: what Delaware charges to keep the entity alive, and what a second state charges once its own tests are met.
Who this is for
- Founders who formed in Delaware and want to use a California address for mail, banking, and customer contact.
- Founders who live in California and are being told to incorporate in Delaware.
- Anyone who has been quoted a Delaware setup as cheap and wants to see the recurring numbers before committing.
The setup is simple to describe: form the company in Delaware, then use an address somewhere else for everything customers and banks actually see. Delaware holds the legal entity. A street address in San Francisco handles the mail, the bank paperwork, the invoices, and the website footer.
The setup is fine. The confusion sits in one sentence people say about it: "I have a California business address." That sentence can mean three different things, and which of them is true changes what you owe. Writing the address down is free. Owing California's $800 and filing with California's Secretary of State are separate events, they come from separate statutes, and this piece is about telling all three apart.
What Delaware itself asks for
Delaware wants a registered agent in the state. That agent receives lawsuits and official state notices on the company's behalf, which is a narrower job than receiving your mail. A registered agent is a separate service from a business address, and save office does not sell registered agent service; you would arrange that with a Delaware agent directly.
Beyond the agent, what Delaware charges depends on which entity you formed, and this is where the word "cheap" starts doing unreliable work.
| Delaware LLC | Delaware corporation | |
|---|---|---|
| Annual report | Not required | Required, due March 1 |
| Report fee | None | $25 exempt domestic, $50 non-exempt domestic |
| Franchise tax | $300 flat, due June 1 | Calculated, minimum $175 or $400 depending on method |
| If you miss it | $200 penalty plus 1.5% monthly interest | $200 penalty plus 1.5% monthly interest |
Delaware Division of Corporations, annual report and tax instructions.
If you formed an LLC, the Delaware LLC column is the whole story: $300 every June 1, no annual report, nothing to calculate. The rest of this section is about corporations, where Delaware offers two ways to calculate the same tax and they are not close to each other. The Division of Corporations states it plainly: the minimum is $175.00 under the Authorized Shares Method and $400.00 under the Assumed Par Value Capital Method, "with a maximum tax of $200,000.00 for both methods unless it has been identified as a Large Corporate Filer, then their tax will be $250,000.00."
Under the Authorized Shares Method, 5,000 authorized shares or fewer cost $175. The next tier, 5,001 to 10,000 shares, is $250, and every additional 10,000 shares or part of one adds $85. A company that authorized 100,000 shares at formation lands at $1,015 by Delaware's own worked example. Run that same schedule on ten million authorized shares and the arithmetic reaches $85,165.
The method you are billed under may not be the one you owe
Delaware assesses the annual franchise tax on the authorized shares figure, then tells filers to "use the method that results in the lesser tax." For a company whose assets are small relative to the shares it authorized, the Assumed Par Value Capital Method produces the lower number, because it works from total gross assets rather than from how many shares you happened to authorize. The recalculation is available to you, but you have to apply it yourself.
So the honest version of the Delaware advantage is not that it is cheap. It is that the corporate law is well tested and the courts that apply it are specialized. Those are real, and they attach to the entity regardless of what address you use. They are not tax advantages, and reading them as tax advantages is where the California problem starts.
Using an address is not the same as owing tax or registering
Here is what the phrase "California business address" hides. Writing an address down is a decision you make. Owing California's $800 and filing with California's Secretary of State are consequences, they come from different statutes with different tests, and an address is not what causes either one.
| Owing the $800 tax | Registering with the Secretary of State | |
|---|---|---|
| Which statute | Revenue and Taxation Code section 23101 | Corporations Code section 2105 for corporations; sections 17708.02, 17708.03, and 17708.07 for LLCs |
| What the test asks | Whether you actively engage in transactions for gain here, are organized or commercially domiciled here, or cross the sales, property, or payroll amounts | Whether you transact intrastate business, defined as repeated and successive transactions in the state, other than interstate or foreign commerce |
| What it costs | $800 a year, whether or not the company earned anything | A filing fee, then a Statement of Information on a repeating cycle |
| Does your address decide it | No | No |
Cal. Rev. & Tax. Code section 23101; Cal. Corp. Code sections 191, 2105, 17708.03, and 17708.07.
The Franchise Tax Board says so itself, in a sentence that only makes sense if the two are separable: "A foreign corporation that does not qualify with the SOS, but does business in California, is subject to the franchise tax." The tax can reach a company that has no registration duty. The Corporations Code runs the other way as well, listing activities that do not amount to transacting intrastate business, including soliciting orders that require acceptance outside the state and transacting business in interstate commerce.
For the tax question, section 23101 is where the definition lives. Subsection (a) covers actively engaging in any transaction for the purpose of financial or pecuniary gain or profit. Subsection (b) adds more conditions: being organized or commercially domiciled in the state, plus three dollar tests. Meeting any one of them is enough, and each dollar test is written as the lesser of a published amount or 25 percent of your total, so a smaller company can cross it on the percentage alone.
Read that list and notice what is absent. There is no address condition. Nothing in it asks which street appears on your letterhead. The conditions ask where you are, where your activity happens, and how much of it lands in California. The registration test does not name an address either: it asks whether you enter into repeated and successive transactions here. Where your mail arrives is not something either statute measures.
What happens if you skip registration is not symmetric between the two entity types, which is worth knowing before you decide it does not apply to you. Section 2105 bars a foreign corporation from transacting intrastate business without a certificate of qualification, and section 2203 attaches penalties to doing it anyway. For LLCs the enforcement runs through section 17708.07: a foreign LLC transacting intrastate business cannot maintain an action or proceeding in California until it holds a certificate of registration. The practical translation is that an unregistered LLC discovers the problem when it tries to sue someone here.
| 2025 tax year | Doing business under section 23101 if it exceeds the lesser of |
|---|---|
| California sales | $757,070 or 25% of total sales |
| California property | $75,707 or 25% of total property |
| California payroll | $75,707 or 25% of total payroll |
FTB, Doing business in California, page last updated November 7, 2025. The amounts are indexed annually, so confirm the figure for your own tax year.
Ready to set up your business address?
See which US cities fit — about a minute, no card needed.
Two cases that show how the tax test works
The dollar amounts look like the whole test, and that reading is the expensive one. They are three of the five conditions section 23101 lists. Subsection (a) is a separate route with no dollar figure in it at all, and it defines doing business as "actively engaging in any transaction for the purpose of financial or pecuniary gain or profit." Two decided cases show what each route does in practice. Both are franchise tax cases, so they speak to the $800 question rather than to the registration question.
Swart Enterprises v. Franchise Tax Board (2017)
An Iowa corporation that farmed in Kansas held a 0.2 percent interest in a California LLC, and the decision records that interest as its sole connection to California. The FTB billed it for the $800 minimum tax. The California Court of Appeal held that passively holding that interest, with no right to control the LLC's business, was not doing business in California. The opinion is certified for publication, and the FTB announced it would not appeal. The FTB also limited how far it would carry the result: its notice says it will follow Swart in situations with the same facts, and Legal Ruling 2018-01 treats the case as a narrow exception to the general rule that members of a California-operating LLC that is taxed as a partnership are themselves doing business here.
Appeal of Metro Mortgage Group, LLC, 2025-OTA-093SCP
A Colorado LLC had one occasional part-time clerical employee who lived in California and was paid $121, which the decision records as less than one percent of total payroll. The Office of Tax Appeals noted in a footnote that the FTB conceded the company did not meet the payroll threshold. The panel still found the company was doing business, on the activity route, reasoning that hiring an employee is a profit-motivated transaction that contributed to the business. The $800 stood. The decision issued in December 2024, is stamped nonprecedential, and was decided under the small case program, so it does not bind future cases.
Put side by side, the two answer different questions. Swart says a passive financial interest, with no control, was not enough on those facts. Metro Mortgage says an activity in the state can be enough even when it is small, and even when the published threshold for that exact category is not met.
That second point is the one worth carrying. The dollar amounts are not a floor you stay under to be safe, because subsection (a) does not have a floor. A company that reads the $75,707 payroll figure and concludes that one part-time California hire is therefore fine has read only part of the statute. We are describing what these two decisions held, not predicting how any particular set of facts would come out; a nonprecedential decision is a signal about how the FTB approaches these disputes rather than a rule.
If you live in California, the tax answer is already decided
One of the listed conditions is being organized or commercially domiciled in California. Commercial domicile is where the business is directed and managed, so a founder living in California and running the company from a California desk generally meets it on day one.
For that founder, the Delaware filing does not change the California tax answer, and neither does an out-of-state address. The company is a Delaware entity that is doing business in California under section 23101, which means the $800 on top of what Delaware charges. Whether the registration duty applies as well is the separate Corporations Code question, and it is one to put to a California professional rather than to assume in either direction. This is the scenario where the two-state structure adds cost rather than removing it, and it is worth being blunt about.
The founder for whom the structure works differently is the one whose work, staff, and property are somewhere else, or outside the United States entirely, and who wants a US address for mail and paperwork. For that founder, the address is just an address.
What each duty actually starts
If either answer turns out to be yes, it is worth knowing what begins, because the $800 is only the headline.
- The $800 annual minimum tax, owed whether or not the company earned anything that year. It follows the section 23101 test rather than the registration filing.
- A first-year difference by entity type. A corporation that incorporates or qualifies in California is exempt from the minimum tax for its first taxable year under section 23153(f), and qualifying counts, so a Delaware corporation registering here is covered. The LLC version came from AB 85 and reached only entities that organized or registered between January 1, 2021 and December 31, 2023, so an LLC formed now owes the $800 in year one.
- A change already on the books for LLCs that file the standard LLC return. Senate Bill 180, signed in July 2026, added a first-year annual tax of $400 for taxable years beginning in 2027 through 2029. The Franchise Tax Board's LLC page was last updated in March 2026, before the bill was signed, so as of this writing the code section is the place to check.
- A Statement of Information with the Secretary of State, which puts an address on the public record. Corporations file it annually; LLCs file it every two years.
- California returns and, depending on total California income, an additional LLC fee separate from the $800.
- Delaware's own obligations do not stop. Two states now, two sets of deadlines.
- None of it ends by itself. The $800 runs for each taxable year, or part of one, until a certificate of cancellation is filed with the Secretary of State, so stopping your California work is not the same as stopping the bill. The address, by contrast, you can change tomorrow.
One narrow protection worth knowing
Public Law 86-272 can shield a company from taxes based on net income when its only California activity is soliciting orders for tangible goods. The FTB is explicit that this protection is narrower than it sounds: those companies may still be considered to be doing business in California and may still be liable for filing and paying the applicable amounts. It is not an exemption from the $800.
What this means when you pick an address
The useful conclusion is unglamorous, and it is not what an address service has an incentive to tell you.
Using a save office address does not register your company in California, and it does not create the $800 either. It also does not prevent either one from applying, and it cannot make an obligation disappear that your own activity created. If you have an employee in California, the address on your invoices is not the fact that matters. An address is a place to receive things and a way to keep your home address off public filings and out of customer view. That is genuinely useful, and it is a different job from the one these statutes are describing.
So the sequence that works is: decide where you and your work actually are, answer the tax question and the registration question from that, and then choose an address to handle mail and paperwork. Doing it in that order costs nothing extra. Doing it in reverse, and treating the address as the thing that settles either question, is how founders end up surprised by a bill in a state they thought they had avoided.
If the facts are close to the line, that is the point to ask a California tax professional rather than to reason from a blog post, including this one. What we can tell you is what the statutes list, what the FTB publishes, and what these two cases held.
Frequently Asked Questions
Not sure what you need?
Two short pages sort it out — what the products actually are, and which situation you're in.
