You do not need a business license in every state. You need one in every state where your business has a legal connection strong enough to trigger that state’s registration, tax, or licensing rules. That connection is called a nexus, and it can come from a physical presence (an office, an employee, inventory in a warehouse) or from economic activity alone (enough sales or transactions into the state). Separately, if you work in a federally regulated industry, you need a federal license that applies no matter where you operate.
The 2018 Supreme Court decision in South Dakota v. Wayfair, Inc. expanded states’ power to require registration from out-of-state sellers who have no physical footprint at all, and the compliance picture has grown more complicated since.1Supreme Court of the United States. South Dakota v. Wayfair, Inc. The practical answer for most businesses is: start with where you physically operate, then look at where you sell.
When a State Can Require You to Register
A nexus is the legal link that gives a state authority over your business. Physical nexus is the older and more intuitive version. You have it when you maintain an office, lease warehouse or storage space, keep inventory in a fulfillment center, or employ someone who works from inside the state, even remotely. Short-term activity counts too. Sending a sales rep to a trade show or performing an on-site installation can create a physical nexus in a state where you otherwise have no footprint.
Economic nexus is newer. Under the Wayfair ruling, a state can require you to collect sales tax once you cross a sales or transaction threshold, even if you’ve never set foot inside its borders. The South Dakota law at issue in the case used $100,000 in sales or 200 transactions in a calendar year.1Supreme Court of the United States. South Dakota v. Wayfair, Inc. Most states adopted something similar, but not identical. Once you cross whichever number a state has set, registration deadlines start running immediately.
Economic Nexus Thresholds Vary by State
The $100,000-or-200-transactions figure became a common starting point, not a universal one. Some states set the sales threshold at $250,000 or $500,000. A few require you to meet both a dollar amount and a transaction count before nexus kicks in, rather than either one alone. A business can owe obligations in one state and fall safely below the line in a neighboring state with higher thresholds.
The direction of travel since 2020 has been to drop the transaction count. Two hundred transactions could sweep in very small sellers, so a growing number of states have eliminated the transaction test and rely on a dollar figure alone.1Supreme Court of the United States. South Dakota v. Wayfair, Inc. If you sell digital products or software-as-a-service, read each state carefully. Some tax those products and some don’t, but your sales may still count toward the nexus threshold in states that exempt them from tax.
One trap worth flagging: most states count exempt sales when calculating whether you’ve crossed the threshold. If you sell $80,000 in taxable goods and $30,000 in exempt goods into a state with a $100,000 line, you’ve hit $110,000 and created nexus, even though part of that revenue will never be taxed.
Registering Your Entity in Another State
Tax nexus is one piece. The other is foreign qualification, which is the process of registering your corporation or LLC with the Secretary of State in a new state when you actively conduct business there. You’re not re-incorporating; you’re extending your existing entity’s legal recognition across the border. The usual triggers are recurring local activity: maintaining an office, entering contracts, hiring local workers, or regularly providing services on-site. A one-off transaction shipped into a state generally does not require it.
Foreign qualifying typically requires a certificate of good standing from your home state, your formation documents, and the name of a registered agent physically located in the new state. Every state requires a registered agent to accept lawsuits and official notices on your behalf. Filing fees range from roughly $50 to $750, with most states falling between $150 and $250.
Skipping foreign qualification when it’s required has a specific consequence that catches owners off guard: a company operating in a state without registering generally cannot sue in that state’s courts. You can still be sued and still have to defend yourself. You just can’t initiate legal action to enforce a contract or collect a debt until you register and clear any outstanding penalties. States may also impose fines and back fees covering the entire period of unauthorized operation.
Federal Licenses That Apply Everywhere
Most businesses don’t need a federal license. If yours does, the obligation is national, not state-by-state. The U.S. Small Business Administration lists several categories of activity that require federal authorization:2U.S. Small Business Administration. Apply for Licenses and Permits
- Manufacturing, wholesaling, or importing alcoholic beverages, through the Alcohol and Tobacco Tax and Trade Bureau.
- Operating aircraft, transporting people or cargo by air, and aircraft maintenance, through the Federal Aviation Administration.
- Manufacturing, selling, or importing firearms or explosives, through the Bureau of Alcohol, Tobacco, Firearms and Explosives.
- Radio, television, satellite, and cable broadcasting, through the Federal Communications Commission.
- Importing or transporting animals, animal products, or plants across state lines, through the U.S. Department of Agriculture.
- Commercial fishing, through NOAA Fisheries, and importing or exporting wildlife products, through the U.S. Fish and Wildlife Service.
- Commercial nuclear energy production, through the Nuclear Regulatory Commission, and drilling on federal lands, through the Bureau of Safety and Environmental Enforcement.
Don’t confuse federal licensing with an Employer Identification Number. An EIN is a tax ID, essentially your business’s Social Security number. You need one to pay federal taxes, hire employees, and open a bank account, and many state license applications ask for it. It does not authorize you to do anything regulated.3U.S. Small Business Administration. Get Federal and State Tax ID Numbers
State and Local General Business Licenses
Only about nine states require a statewide general business license that covers everyone doing business within their borders. In those states, you apply through a central portal and receive a single license for the whole state. Most states leave general business licensing to cities and counties, which means your obligation depends on where your physical operations actually sit.
Where there’s no statewide requirement, each municipality sets its own rules. A business with offices in two cities within the same state may need a separate license from each city’s clerk or finance department. Fees commonly fall in the $50 to $150 range, higher for specialized activities or larger cities. The process usually involves a short application, the fee, and sometimes a zoning review.
Zoning matters more than people expect. Local governments use it to control which business types operate in residential, commercial, and industrial areas. If you work from home, many localities require a home occupation permit, often with restrictions on customer visits, signage, non-resident employees, and the share of floor space used for business. Starting up without checking can result in complaints, fines, or an order to shut down until you relocate or get approval.
If your legal business name differs from the name you use with customers, you may also need to register a fictitious name, often called a DBA. That’s a separate filing from your business license, usually handled at the county level, and it applies to both in-state and foreign-qualified entities operating under a trade name.
Sales Tax Permits Are a Separate Obligation
A sales tax permit is not the same thing as a business license, and conflating the two is one of the most common compliance mistakes. The permit registers you with a state’s department of revenue and authorizes you to collect sales tax from customers. You need one once you establish economic nexus in a state that imposes sales tax. Operating without the permit when you should have one can create personal liability for the uncollected tax, meaning the state can pursue owners individually rather than only the company.
Applying usually requires your EIN, information about your business structure, the names and details of officers or owners, and projected sales. The state uses that to assign a filing frequency (monthly, quarterly, or annually) based on expected volume. The permit itself is free in most states. Once registered, you must file returns on schedule even in periods with no taxable sales. A zero-dollar return still has to be filed.
Marketplace Facilitator Laws
If you sell through platforms like Amazon, Etsy, or Walmart Marketplace, your sales tax may already be handled for you. As of early 2025, 44 states plus the District of Columbia have marketplace facilitator laws that shift collection and remittance to the platform for transactions processed through its system.
That doesn’t necessarily eliminate your registration obligation. Some states still require sellers to hold their own permit even when the marketplace collects. Marketplace sales also often count toward your economic nexus threshold. If you sell both on a platform and through your own site, you need to track your direct sales separately and register wherever those sales alone create nexus.
Professional Licensing Across State Lines
General business licenses sit alongside professional licenses for regulated occupations, not in place of them. Physicians, accountants, attorneys, electricians, cosmetologists, and many other professionals need a license from the state board that governs their field. These boards set education requirements, administer or accept qualifying exams, and discipline practitioners. Practicing without the right credential can bring criminal charges, civil fines, and bars from the profession.
Interstate licensure compacts have made cross-state practice easier in several fields. The Enhanced Nurse Licensure Compact covers 43 jurisdictions, letting registered nurses and licensed practical nurses practice across member states under a single multistate license. The Interstate Medical Licensure Compact includes 42 states plus the District of Columbia and Guam. Physical therapists have the PT Compact, active in 38 states and the District of Columbia.
Compacts reduce paperwork; they don’t eliminate it. Most still require a separate application, often proof of continuing education, and sometimes a fee for the compact privilege. Professionals in fields without an active compact, including attorneys, generally face the full licensing process in each new state, which can include additional exams and supervised hours. Telehealth and remote consulting complicate this further, because the licensing obligation typically follows the client’s location, not yours. Check with the relevant board in every state where you’ll have clients before offering services.
Staying Registered Year to Year
Getting licensed is the easier half. Staying compliant is where businesses stumble. Most states require entities, including foreign-qualified ones, to file an annual or biennial report with the Secretary of State. These reports update your business address, officers, and registered agent. Fees range from $0 for a purely informational filing to over $800 in states that bundle the report with a franchise or minimum tax.
Missing these filings escalates quickly. Late fees come first. After an extended period of nonfiling, often one to three years depending on the state, the Secretary of State can administratively dissolve or revoke your entity. A dissolved entity technically cannot carry on business except to wind down its affairs. If owners keep operating through a dissolved entity, they risk personal liability for obligations the company incurs after dissolution, because the corporate or LLC shield is no longer recognized.
Business licenses, sales tax permits, and professional licenses each have their own renewal cycles on top of annual reports. Once you’re registered in five or more states, tracking deadlines manually becomes a real vulnerability. A compliance calendar or service that monitors every state where you’re registered is the most reliable way to keep the registrations you worked to obtain.