State Income Tax When Your Business Crosses State Lines

Does a sales tax permit mean you must file income tax there?

A sales tax permit does not by itself settle whether the same state requires a business income or franchise tax return. Test each tax separately, including any effect the permit has under that state's rules. Minnesota describes business income tax nexus separately. In Texas, a foreign taxable entity with a use tax permit is presumed to have franchise tax nexus unless it overcomes the presumption. Texas Comptroller.

A state may require sales tax collection from a remote seller whose business income is protected from that state's net income tax. The reverse can also occur: work in a state can create an income tax filing duty even when sales tax collection is not the issue. For sales tax, see When you must collect sales tax. Registering the legal entity with a state is another question; see Registering in another state.

Which activities can create a second state's income-tax filing duty?

Sales, services, workers and property can each create a state tax connection, often called nexus. The answer depends on the state's law, the tax, the entity and what the business actually did there. Minnesota says an out-of-state business may need a return when it works in or has a connection to Minnesota.

For each tax year, list where the business was formed or registered and where it had customers, work, workers or property. In each state, test income, franchise and gross-receipts tax rules, then any Public Law 86-272 protection. Identify the entity return, calculate state-source income, and test each owner's resident or nonresident return. Use the records checklist below. A return can be required for reasons beyond profit; California lists incorporation, registration, business activity and California-source income as S corporation filing triggers.

Can customer sales alone require a return without an office?

Yes, in some states. Minnesota says a business need not be physically located there to owe business income tax when a customer receives a service there. Minnesota Revenue. New York's Article 9-A corporate receipts threshold is $1,283,000 for the page's tax year, subject to special rules for groups and corporate partners. New York Tax Department.

Crossing a receipts threshold is a nexus test, not a shortcut to tax due. First identify whether the receipts count under that state's sourcing rule. Then check whether federal protection for qualifying goods orders applies, what return the state requires, and how much income the state attributes to itself. New York says a corporation meeting its receipts test but protected by Public Law 86-272 need not file an Article 9-A return. California gives a different filing result for a protected corporation doing business there. California FTB.

Does a remote employee create income-tax nexus?

A remote employee can create company nexus in the state where the employee works. California's example says an out-of-state partnership whose employees sell and perform warranty work from California homes is doing business there, even below its measured thresholds. California FTB.

Record the employee's actual work location and dates, not only the office named in the employment contract. Duties matter too: qualifying solicitation of goods orders may have federal protection, while warranty work and other services can fall outside it. California FTB Publication 1050. For payroll accounts and withholding, see Employees in another state.

When does Public Law 86-272 protect goods orders?

Public Law 86-272 bars a state net income tax on qualifying interstate sales of tangible personal property when the seller's only in-state business activity is soliciting orders, the orders go outside the state for approval, and accepted orders are filled from outside the state. It does not cover every business selling across state lines. 15 USC 381.

The law does not protect a corporation from its incorporation state's net income tax or an individual from their resident state's net income tax. 15 USC 381.

The Multistate Tax Commission's statement addresses website activity, but it describes the interpretation of states that support it; check the destination state's own position. Protection also does not resolve sales tax, entity registration or every franchise tax. A protected corporation doing business in California must still file a return and generally pay the minimum tax, except that a newly incorporated or qualified corporation gets a first-year waiver; New York generally requires no Article 9-A return when a foreign corporation meets only its receipts test and all in-state activities are protected.

What if I work across states as a sole proprietor?

A sole proprietor tests each state's individual nonresident return rules for business income sourced there. The sole proprietorship has no separate partnership or corporate income-tax return. California lists Form 540NR for a nonresident sole proprietor, and New York's Form IT-203 instructions cover nonresident business income. A single-member LLC may also have a state LLC filing duty, so check that state's rules. California FTB.

What do partnerships and S corporations file across states?

A partnership or S corporation may file an entity return in each state where that state's filing test is met, even though income passes through to owners for federal tax. The state return determines state-source amounts and gives owners the information for their returns.

An eligible federal S corporation makes the New York election on Form CT-6. All shareholders sign the consent, and an authorized corporate officer certifies the form. File by the fifteenth day of the tax year's third month; an out-of-state corporation starting New York business has until the fifteenth day of the third month after that start for its first New York tax year. Form CT-6, instructions. New York deems eligible shareholders to have elected if investment income exceeds 50% of federal gross income. For a late election, the corporation can request reasonable-cause retroactive relief on Form CT-6 with an explanation if corporation and shareholder returns used S treatment; the state must approve it. Inadvertent missing consent can also be cured under Tax Law section 660(e). New York Tax Law section 660, CT-6 instructions.

If a federal S corporation is taxable in New York but has no New York S election, made or deemed, New York taxes it as a C corporation. Resident shareholders report actual distributions rather than pass-through shares; nonresidents do not report those items under this rule. New York Tax Department.

An LLC's state return depends on how that LLC is taxed and on the state's own LLC rules. California's partnership guidance and doing-business guidance show why a federal classification alone does not finish the state filing test. Check each state before assuming the federal Form 1065 or Form 1120-S is the only entity return.

Partners pay income tax on their own shares, but entity debts are separate. In a California general partnership, general partners are jointly and severally liable for partnership obligations under Corporations Code section 16306, including obligations incurred while they are partners; an incoming partner is not personally liable for earlier obligations. California Corporations Code, Secretary of State.

How is business profit divided among states?

States generally assign business profit through apportionment, using a formula based on the state's rules. The profit is not simply taxed where the owner lives or where the company was formed. California explains that apportionment divides business income among states.

California generally uses a sales-only factor, but specified businesses use a property, payroll and sales formula. It also treats some nonbusiness income under allocation rules instead. California FTB. Other states set their own formulas and rules for where a sale or service is received. Keep customer location and service-benefit records; California says a partnership may have California-source income when a customer receives the benefit of a service there. California FTB.

Nexus and apportionment answer different questions: must the business file there, and how much income belongs on that return? A company can have a filing duty but little apportioned profit. A group or corporate partner may also need to combine receipts for a nexus test, as New York's special rules show.

If owners live in different states, who files nonresident returns?

Owner residence alone does not settle where the company files. Review the company's activities state by state, then review each owner's residence and share of income. A resident owner may report a broader share of income at home; a nonresident owner may need a return in a state where the entity has taxable source income.

New York says resident shareholders of a New York S corporation report their share of pass-through items, while nonresident shareholders report their share derived from New York sources. New York Tax Department. California says each partner reports the share shown on the partnership Schedule K-1, and its partnership booklet explains that a nonresident partner's taxable California income is based on the distributive share of California-source income, not the cash distributed. California FTB, Form 565 booklet.

Check nonresident filing thresholds, withholding or group-return options in each source state, then any resident-state credit for tax on the same income. The credit is conditional: New York limits its resident credit to qualifying income sourced to and taxed by another jurisdiction. An entity return, owner return and credit claim are separate steps.

In California, a qualified full-year nonresident whose California-source income is from the business or other group returns can elect to join its group Form 540NR instead of filing a separate return. The business elects annually by attaching signed Form FTB 3864 to the group return by the personal return due date, generally April 15 after the calendar year. The election cannot be revoked for that year. California FTB, personal due dates.

California pass-through entities generally withhold 7% on California-source payments or distributions to nonresident owners once calendar-year payments exceed $1,500; exceptions include exempt income and an approved waiver. Remit with Form 592-Q on April 15, June 15, September 15 and January 15 of the following year. File Form 592-PTE and give each payee Form 592-B by January 31 of that following year, or the next business day if needed. Submit Form 588 for a waiver at least 21 business days before payment. A withholding agent that fails to withhold may owe the tax plus penalties and interest; a late Form 592-B can cost up to $340 per payee, or $680 or 10% of the required report amount, whichever is greater, for intentional disregard. California FTB, Form 588 instructions, Form 592-B instructions.

Can franchise or gross-receipts tax apply with little or no profit?

Yes. A minimum franchise tax or a tax on gross receipts can apply despite low or negative profit. Washington's business and occupation tax uses gross income without deducting ordinary business costs; check its nexus and filing rules separately. Washington Department of Revenue. California says an incorporated, registered or doing-business S corporation generally faces its $800 minimum, subject to its first-year exception. California FTB. See California minimum tax and LLC fee for the entity-specific rules.

Texas franchise tax can apply to taxable entities formed or doing business there even when they have little or no profit. For this report year, an entity's or combined group's annualized total revenue at or below $2,650,000 means no franchise tax or franchise tax report, but a Public Information Report or Ownership Information Report can still be required; passive and exempt entities have different rules. Annual reports are due May 15. A late report carries a $50 penalty; late tax payment adds 5% within 30 days or 10% after that. See Texas franchise tax. Texas Comptroller, filing requirements, PIR/OIR requirements. If your concern is a Delaware entity's separate franchise tax, see Delaware franchise tax.

Texas first gives notice and at least 45 days to cure before forfeiting an entity's right to transact business. If the entity remains delinquent for 120 days after that forfeiture, its registration may be forfeited with the Secretary of State. Under Tax Code sections 171.2515 and 171.255, an officer, director, partner, member or owner may be personally liable for certain entity debts incurred after the missed due date and before revival, including franchise tax and penalties becoming due after forfeiture. The statute allows a defense for debts incurred over the person's objection or without knowledge despite reasonable diligence; revival does not erase liability. Texas Comptroller, 2026 instructions, Tax Code.

What records test past sales or work in each state?

Build a state-by-state, year-by-year activity record before deciding that a return was missed. The key facts are where customers received goods or services, where people worked, and where the business kept property. Minnesota offers separate activity questionnaires for products and services.

Gather:

• Sales by customer state and date, plus where goods were shipped from or services benefited the customer.
• Employee, owner and contractor work locations, dates and duties, including home-based work.
• Inventory, equipment, warehouses and other property by state and date.
• Entity formation and registrations, sales-tax permits, prior state returns and state notices.
• Each owner's state of residence, ownership period and state Schedule K-1 information.

If years are missing, see Catching up on unfiled business returns.

Example

Illustrative US dollars only. A general partnership has $400,000 of service receipts and $80,000 of business profit. Customers receive $100,000 of those services in California. One partner lives in New York and the other in Oregon; they share profit equally. The partnership also has a worker who performs customer work from a California home.

The California worker creates a doing-business issue under California's example, so the partnership tests a California Form 565 filing. Assuming one service business across states, ordinary California sales-only apportionment and no other adjustments, its Schedule R sales factor is 25% ($100,000 divided by $400,000). That assigns $20,000 of the $80,000 profit to California, or $10,000 per equal partner on Schedule K-1 (565), column (e). Each partner tests a California nonresident return on that California-source share, or eligibility for the partnership's group return, plus a resident-state return and any allowable credit. Actual sourcing, deductions and owner filing thresholds could change the result. California FTB: doing business, Schedule R instructions, Schedule K-1, group return.

Different for you?

• The issue is legal registration after forming in another state: see Registering in another state.
• The worker's payroll accounts or withholding are unclear: see Employees in another state.
• You need to test sales tax collection: see When you must collect sales tax.
• The question is a Texas or California entity charge: see Texas franchise tax or California minimum tax and LLC fee.
• Several states or years may have missing returns, or an S corporation election changes the filings: assemble the state-by-state records above and get corporate tax help. For the order of overdue filings, see Catching up on unfiled business returns.