California Tax Planning for Business Owners With Multistate Income
A business does not need to be formed in California, maintain a California office, or have an owner living in California to create California tax obligations. For a business owner with activity in several states, the analysis generally requires three separate questions: where the owner is a resident, whether the business is doing business in California, and how the business income is sourced or apportioned among states.
Multistate business taxation becomes increasingly important as owners move between states, employees work remotely, businesses serve customers nationwide, and partnerships and S corporations invest or operate across state lines.
California can tax the business entity, the owner, or both, depending on the entity type and the facts. A business owner can also face filing obligations in several states even when the business has only one office.
The starting point is to separate residency, business nexus, and income sourcing. These concepts are related, but they answer different questions.
This analysis should be coordinated with broader California and multistate tax planning, particularly when significant income, distributions, a business sale, or a change of residence is expected.
Three Questions Drive California Multistate Business Taxation
Where Does the Owner Live?
A California resident is generally taxed by California on taxable income from all sources, including business income earned outside California.
Where Is the Business Doing Business?
A business can create California filing and tax obligations through physical activity, employees, property, sales, or other transactions connected with California.
Where Is the Income Sourced?
California uses specific sourcing and apportionment rules to determine what portion of business income belongs to California.
A correct multistate return often requires answering all three questions rather than assuming that the state where the business was formed or where the owner lives controls the entire result.
California Residents Are Generally Taxed on Business Income From Every State
California residents generally are subject to California income tax on taxable income from all sources.
For a California resident who owns an interest in a partnership, limited liability company taxed as a partnership, or S corporation, this generally means that the owner's full distributive or pro rata share of taxable income is included for California purposes, even when some or all of the business operates outside California.
Example: A California resident owns 40 percent of a partnership that operates in California, Texas, and Arizona. The owner generally reports the full distributive share of partnership income to California because the owner is a California resident. Taxes properly paid to another state on income sourced to that state may qualify for an other state tax credit.
This does not mean California is always entitled to keep tax on the same income that another state also taxes. The other state tax credit rules can reduce double taxation when their requirements are satisfied.
Nonresident Owners Can Still Owe California Tax
A business owner who lives outside California does not automatically escape California income tax.
California Revenue and Taxation Code Section 17951 generally taxes a nonresident on taxable income derived from California sources. For partnership and S corporation owners, this can include the portion of pass through business income that is sourced or apportioned to California.
A nonresident owner can therefore receive a California Schedule K 1 and have a California filing requirement even though the owner never became a California resident.
If the owner has recently moved into or out of California, the residency and source income rules should be coordinated. See California Residency and Nonresident Tax Rules: When California Can Still Tax Your Income for the broader residency framework.
What Does Doing Business in California Mean?
California Revenue and Taxation Code Section 23101 defines doing business broadly.
A taxpayer can be doing business in California by actively engaging in a transaction for financial or pecuniary gain or profit in the state. California also has statutory economic nexus tests based on California sales, property, and payroll.
Under those tests, a taxpayer can be treated as doing business when California sales exceed the lesser of an annually indexed dollar amount or 25 percent of total sales. Similar tests apply to property and payroll.
The calculation can also include a taxpayer's pro rata or distributive share of sales, property, and payroll from partnerships and S corporations.
Physical Presence Is Not the Only Way to Create California Nexus
A business can have a California tax obligation without a traditional California office.
Potential connections include:
- Employees working from California
- Inventory stored in California
- California real or tangible property
- California sales exceeding the statutory economic nexus test
- Business representatives performing activities in California
- Ownership or management interests in other entities operating in California
- Services whose customers receive the benefit in California
A remote employee can create California activity even when the business has no formal California office. Inventory can also create a direct physical connection with California.
For a practical example involving inventory stored in California by an online marketplace, see You Are Doing Business in California and Did Not Even Know It.
Passive Ownership of a California Entity Requires a More Careful Analysis
Ownership of an interest in an entity doing business in California does not always mean that a passive out of state owner is itself doing business in California.
In Swart Enterprises, Inc. v. Franchise Tax Board, the California Court of Appeal held that an out of state corporation holding a 0.2 percent interest in a manager managed California limited liability company was not doing business in California based solely on that passive ownership interest.
Precedential Office of Tax Appeals decisions including Appeal of Jali, LLC and Appeal of MJK Real Estate Fund II, LLC further address when limited ownership interests do and do not constitute doing business.
Those cases do not create a universal exemption for passive investors. The owner's management rights, activities, entity structure, and the separate economic nexus tests under Section 23101 must still be considered.
California Business Income May Be Apportioned Even When the Work Occurs Elsewhere
Once a business operates both inside and outside California, the next question is how much income is attributable to California.
For most apportioning businesses, Revenue and Taxation Code Section 25128.7 uses a single sales factor to apportion business income. Certain businesses described in Section 25128 are subject to different rules.
The critical question is therefore often not where the business has payroll or an office, but where its sales are assigned.
Services Are Generally Sourced Where the Customer Receives the Benefit
Revenue and Taxation Code Section 25136 and California Regulation Section 25136 2 apply market sourcing to sales other than sales of tangible personal property.
For services, sales generally are assigned to California to the extent the customer receives the benefit of the service in California.
This can produce an unexpected result for a consultant, professional firm, technology company, or other service business.
Example: A business owner lives and performs all services from Nevada but provides services to business customers that receive the benefit of those services in California. Depending on the nature of the service and the applicable sourcing rules, some of those receipts can be assigned to California even though the owner performed the work outside California.
Franchise Tax Board Legal Ruling 2022 01 explains the analysis for services provided to business customers. The ruling focuses on identifying the customer, the service being provided, the benefit received by the customer, and where that benefit is received.
Tangible Property Uses Different Sales Sourcing Rules
Sales of tangible personal property generally follow the destination and other assignment rules in Revenue and Taxation Code Section 25135 rather than the service market sourcing rule.
Businesses selling physical products therefore need to distinguish product sales from service revenue, licensing revenue, and other receipts when preparing the California sales factor.
Public Law 86 272 Provides Only Limited Protection
Federal Public Law 86 272 can restrict a state's ability to impose a net income tax on certain interstate sellers of tangible personal property.
The protection generally applies when the seller's activities in the state are limited to solicitation of orders for tangible personal property, the orders are sent outside the state for approval or rejection, and accepted orders are filled from outside the state.
It is not a general exemption from California nexus rules.
The protection generally does not extend to sales of services or intangible property. Activities beyond protected solicitation can also cause the protection to be lost. California's current guidance addresses internet activity, remote activity, inventory, customer assistance, warranty services, and other activities that can affect the analysis.
In the precedential 2026 decision Appeal of Ken's Foods, Inc., the Office of Tax Appeals addressed whether the taxpayer's California activities exceeded the protection provided by Public Law 86 272. The decision reinforces that the result depends on the actual activities conducted in California.
How Partnership and LLC Income Is Taxed
A California resident partner or member generally includes the entire distributive share of partnership income in California taxable income.
For a nonresident partner or member, the partnership determines the California source portion under California law.
If the business operates wholly within California, its business income generally is California source income. If it conducts one unitary trade or business both inside and outside California, the California portion generally is determined through allocation and apportionment.
Items that are not business income may follow separate sourcing rules. For example, income from real or tangible property generally follows the location of the property, while income from nonbusiness intangible property is generally sourced at the owner's residence unless the intangible has acquired a business situs or another rule applies.
For owners receiving several Schedules K 1 from different states, the state source schedules should be reviewed rather than simply assuming that the state amounts reported by each entity produce the correct owner level result.
California S Corporations Have an Entity Level Tax
California differs from the federal treatment of S corporations because California generally imposes a tax on the S corporation itself in addition to taxing income passed through to the shareholders.
A California S corporation is generally subject to a 1.5 percent tax on its California source net income, with a 3.5 percent rate for financial S corporations. Minimum franchise tax rules can also apply.
At the shareholder level, a California resident generally reports the entire pro rata share of S corporation income. A nonresident shareholder generally reports the California source portion.
This creates at least two separate layers to model:
- The California tax paid by the S corporation itself
- The California personal income tax imposed on the shareholder's pass through income
An S corporation operating in several states also generally uses California apportionment rules to determine the California portion of its business income.
Nonresident Withholding Does Not Determine the Final Tax
California generally requires partnerships, limited liability companies, and S corporations to withhold California tax on certain distributions of California source income to nonresident owners under Revenue and Taxation Code Section 18662.
Withholding is generally a prepayment of the owner's California tax rather than a separate determination of the owner's final liability.
The amount withheld may therefore be more or less than the tax ultimately calculated on the owner's California return.
Depending on the facts, an entity may also evaluate reduced withholding, a withholding waiver, or a group nonresident return where the applicable requirements are satisfied.
The California PTE Elective Tax Remains an Important Planning Tool
California's pass through entity elective tax allows qualifying partnerships and S corporations to elect to pay California tax at the entity level.
For taxable years beginning in 2026 through 2030, the elective tax remains 9.3 percent of qualified net income attributable to participating qualified taxpayers.
The participating owner generally receives a California personal income tax credit based on that owner's share of qualified net income.
The federal planning benefit arises because IRS Notice 2020 75 generally permits qualifying state income taxes imposed on and paid by a partnership or S corporation to be deducted in computing the entity's federal taxable income. The qualifying payment is not included in the individual owner's federal SALT deduction limitation.
For 2026 through 2030, a qualified entity generally must make a Payment 1 amount by June 15 equal to the greater of $1,000 or 50 percent of the PTE elective tax paid for the prior taxable year.
Beginning in 2026, failure to make the full required June 15 payment does not automatically prevent the entity from making the election. Instead, the qualified taxpayers' credits are reduced by 12.5 percent of their respective shares of the unpaid amount that was required by June 15.
The election should therefore be modeled rather than treated as automatic. The analysis can include the owner's federal marginal tax rate, available individual SALT deduction, California credit utilization, Section 199A effects, cash flow, and the timing of the entity payment.
For the detailed 2026 payment and credit reduction rules, see Missed the 2026 California PTE Tax Payment? How the 12.5% Credit Reduction Works.
The interaction with the increased federal SALT deduction limit is discussed in 2026 SALT Deduction Limit: How the $40,400 Cap Affects California Taxpayers.
Credits for Taxes Paid to Other States Require a Sourcing Analysis
A California resident who pays a qualifying net income tax to another state on income that is also taxed by California may be eligible for an other state tax credit under Revenue and Taxation Code Section 18001.
The credit is not automatically equal to the tax paid to the other state.
California generally requires the income to be considered sourced to the other state under California's own sourcing rules. The calculation also limits the credit based on the California tax and the other state's tax attributable to the double taxed income.
California also has special rules governing which state allows the credit when the taxpayer is a California nonresident and resides in another state.
A Business Sale Can Change the California Sourcing Result
Business owners planning a sale should distinguish between an owner selling an equity interest and the entity selling its underlying business assets.
The two transactions can produce different California sourcing results.
The precedential Appeal of The 2009 Metropoulos Family Trust addressed gain flowing through from an S corporation's sale of goodwill and applied the business income sourcing rules rather than treating the owners as if they had directly sold an intangible asset.
Partnership interest sales can also contain more than one sourcing component. Franchise Tax Board Legal Ruling 2022 02 explains that gain attributable to Internal Revenue Code Section 751 unrealized receivables and inventory can be treated as business income and sourced under California business income rules to the extent connected with California.
As a result, moving out of California before selling a business interest does not by itself establish that every component of the sale will escape California tax.
Changing Residency Before a Business Transaction Requires Advance Planning
A business owner moving from California to another state can change the scope of California taxation, but the result depends on both residency and income sourcing.
While the owner is a California resident, California generally taxes taxable business income from all sources. After the owner becomes a nonresident, California generally continues to tax California source business income.
Pass through income also does not become nontaxable merely because the entity retains the cash. Partners and S corporation shareholders generally report their distributive or pro rata shares of taxable income whether or not the entity distributes the corresponding cash.
When a move occurs near a large distribution, asset sale, stock sale, partnership interest sale, or other transaction, the residency date and the character and source of the income should be evaluated before the transaction closes.
Federal and California Taxable Income Can Be Different
A federal business return is only the starting point for the California calculation.
California updated its general Internal Revenue Code conformity date to January 1, 2025 through Senate Bill 711, but California continues to have significant differences from federal tax law.
California generally did not conform to the federal One Big Beautiful Bill Act enacted after that conformity date. Important differences remain in areas that can include depreciation, Section 179 expensing, business interest deductions, and other business tax provisions.
These differences can create separate California basis, depreciation, carryover, and taxable income calculations that continue for years after the original adjustment.
For additional discussion of those differences, see California After OBBBA: Federal and California Tax Differences.
Estimated Tax Planning Should Be Done at Both the Entity and Owner Level
A multistate business can have several separate cash requirements during the year.
Depending on the entity and the states involved, those payments may include:
- California entity level franchise or income tax
- California PTE elective tax payments
- Owner level California estimated tax
- Nonresident withholding
- Estimated payments to other states
- Other state entity level taxes
These payments should not be viewed independently. PTE credits, other state tax credits, withholding, prior year overpayments, and estimated tax safe harbors can all affect the amount that should actually be paid by the owner.
The objective is to coordinate the entity and individual projections so that tax is paid to the correct jurisdiction at the appropriate level without unnecessarily duplicating payments.
Questions Business Owners Should Review Each Year
A multistate review should generally consider:
- Where each owner is a resident
- Where employees and owners actually work
- Where inventory and other business property are located
- Where customers receive services
- Where tangible products are delivered
- Whether California doing business standards are satisfied
- Whether the entity has new filing obligations in other states
- How each Schedule K 1 divides total and state source income
- Whether the California apportionment percentage is correct
- Whether an other state tax credit is available
- Whether nonresident withholding is required
- Whether the California PTE elective tax produces a net benefit
- Whether federal and California basis and deductions differ
- Whether a planned move, sale, or distribution changes the sourcing result
These questions are particularly important before expanding into a new state, hiring a remote employee, selling a business, moving out of California, or receiving a significant Schedule K 1 item.
Multistate Tax Planning Is More Than Filing Several State Returns
The central issue is not simply how many tax returns must be filed. The larger planning question is how the owner's residence, the business's activities, California nexus, income sourcing, apportionment, entity level taxes, credits, withholding, and federal tax treatment interact.
That analysis can materially affect the timing and structure of a transaction, the amount of estimated tax required, and whether income is being reported consistently among the states involved.
Business owners with substantial pass through income or activity in several states benefit from evaluating these rules before the year is over rather than discovering the multistate consequences when the returns are prepared.
California and Multistate Business Tax Planning
If you own a partnership, S corporation, limited liability company, or other business with income or activity in more than one state, I can review the entity and owner level tax consequences together and identify planning items before the returns are filed.
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