How to Start an LLC: 9 Steps, Costs and Complete Checklist

Step 1: Decide whether an LLC is the right structure

An LLC is a state-law entity that can separate business obligations from an owner's personal assets when it is properly formed and operated. It is flexible: one person, several people or another company can own it, subject to state and industry rules. That flexibility does not mean an LLC is automatically the best entity for every founder.

A sole proprietor may not need an LLC to test a low-risk idea. A venture-backed startup may be better served by a Delaware C corporation because investors generally want stock and standardized corporate governance. A licensed professional may need a professional LLC or another regulated form. Compare liability, tax, ownership and fundraising before paying a filing fee.

Tax treatment is a separate choice. A one-owner domestic LLC is generally disregarded for federal income tax by default; a two-owner LLC is generally a partnership. Eligible owners can consider a corporate election. Non-US ownership can add information returns and home-country consequences, so do not interpret pass-through taxation as tax-free status.

Step 2: Choose the formation state

For a founder working from a US state, forming in that operating state is usually the cleanest starting point. A Wyoming or Delaware filing does not override the laws where the founder, employees, office, store or inventory are located. The out-of-state LLC may need foreign qualification, creating two registered agents, two state calendars and two fee sets.

Delaware can make sense for institutional venture financing and sophisticated governance. Wyoming and New Mexico can appeal to some location-independent owners because of cost or public-record choices. Those benefits should be written into a short decision memo and compared with banking, tax and qualification cost rather than repeated from provider marketing.

A non-US founder with no physical US operating state has a different decision. Compare official formation and annual fees, provider renewals, banking eligibility, payment access, investor plans and home-country classification. The cheapest state is not useful if the company cannot open the required account or creates an unfavorable tax mismatch at home.

Step 3: Search and clear the LLC name

Use the official Secretary of State or corporation-agency database. Search the distinctive words without punctuation or the LLC ending, then test close spellings, plurals and spacing. Open similar records and note whether they are active, dissolved or reserved. An inactive result is not automatically available for immediate reuse.

Most states require a name distinguishable on their records and an ending such as LLC, L.L.C. or Limited Liability Company. Regulated words—bank, insurance, trust, engineering and others—may require approval. A preliminary search is not final approval; the filing office decides when it reviews the reservation or formation document.

State acceptance does not create trademark rights. Search the USPTO database, state trademarks, web results, domains, marketplaces and social platforms before buying branding. A DBA can let an LLC trade under another name, but it does not create a second liability entity or defeat another party's trademark.

Step 4: Appoint a registered agent

An LLC generally needs a registered agent and physical registered office in its formation state before filing. The agent receives service of process and official notices. A P.O. box alone usually does not qualify. Some states call the role a statutory agent or agent for service of process, and Pennsylvania uses a registered-office system.

A founder can sometimes act personally when the founder has a qualifying address and is reliably available. A commercial service can keep a home address off some public filings and provide continuity, but it is not automatically a virtual office, bank address or complete mailroom. Read the service scope and renewal price.

Keep the appointment active until the state accepts dissolution or withdrawal. If an agent resigns or mail is ignored, the company can miss a lawsuit, tax notice or annual-report warning. Secure a replacement and file the change before cancelling the old service.

Step 5: File the formation document

The document is usually called Articles of Organization, although Texas uses a Certificate of Formation and Pennsylvania uses a Certificate of Organization. File through the official state portal or accepted paper route. Typical fields include legal name, addresses, registered agent, management structure, organizer and effective date.

State charges vary from under $50 to several hundred dollars. Optional certificates, expedited handling and service-provider fees are separate. Review the official fee schedule immediately before payment. Save the acceptance, stamped document, receipt and state entity number outside the filing portal or provider dashboard.

You can file directly or hire a formation service. A service is most useful when the founder values guided preparation, registered-agent coordination or bundled compliance. Compare the total recurring scope, not a promotional first-year price. No service can decide cross-border tax or operating-state obligations without the underlying facts.

• Florida: follow the official Sunbiz Articles process.
• Texas: file Form 205 with the Secretary of State.
• California: file LLC-1, then the separate Statement of Information.
• Arizona: include the correct management attachment and agent acceptance.
• North Carolina: file L-01 with the Secretary of State.
• Pennsylvania: file the Certificate of Organization and docketing statement.

Step 6: Sign an operating agreement

The operating agreement records how the LLC is owned and governed. It is generally kept internally rather than filed publicly. A signed agreement helps banks, accountants, buyers and courts understand authority and reinforces that the company is separate from the owner.

A single-member agreement should name the owner, contribution, management authority, tax classification and recordkeeping rules. A multi-member agreement needs percentages, contributions, voting, manager powers, distributions, tax allocations, transfer limits, departures, death, disability, deadlock and dispute procedures. Generic templates are weakest precisely where co-founders later disagree.

Update the agreement and ownership schedule when a member joins, leaves or transfers an interest. Match the agreement to state filings, tax returns, bank verification and the bookkeeping capital accounts. An unsigned template that conflicts with actual ownership creates more ambiguity than it solves.

Step 7: Get the EIN and open the account

Apply for the EIN after the state accepts the LLC. The IRS issues EINs free. Applicants whose principal business is in the United States and whose responsible party has an SSN or ITIN may use the IRS online tool; international applicants can use the current Form SS-4 phone, fax or mail routes. Submit only one application method for the entity.

Use the accepted legal name and responsible-party information. Save the EIN assignment notice, because banks and tax preparers often request it. An EIN is a federal identifier: it does not create the LLC, provide a business license, elect S-corporation treatment or prove that no tax return is required.

Open an account in the legal entity's name and keep business money separate. Expect requests for formation evidence, EIN confirmation, operating agreement, ownership details, identification and a credible business description. Nonresident acceptance depends on residence, activity and provider policy; verify eligibility before forming solely for an account.

Step 8: Register tax accounts and licenses

The Secretary of State filing does not register every obligation. Review state revenue accounts, sales tax, employer withholding, unemployment insurance, industry licenses, city registrations and county permits. Employees, inventory and work in another state can create registrations beyond the formation state.

Confirm federal tax classification and the first return before money moves. Foreign-owned single-member LLCs can have Form 5472 reporting even when no US income tax is due. Partnerships with foreign members can face Form 1065 and Section 1446 withholding. Eligible US owners considering S-corporation treatment need a payroll and reasonable-compensation plan.

FinCEN currently exempts entities created in the United States from federal BOI reporting under the CTA. Foreign companies registered in a US jurisdiction can still be reporting companies unless exempt. Because the rule changed rapidly, verify FinCEN's current quick reference at formation rather than relying on an old checklist.

Step 9: Build the annual compliance calendar

Record the state annual or biennial report, franchise tax, registered-agent renewal, federal return, sales-tax returns, payroll filings and licenses. Some deadlines arrive within 90 days of formation, while others are tied to an anniversary or fixed date. Do not assume the filing service monitors items outside its package.

Store accepted reports, tax returns and payment confirmations by year. Reconcile books monthly and keep owner contributions, loans, reimbursements and distributions distinct. Update the state, IRS, banks and licenses after changes of address, responsible party, name or ownership.

Review the structure after a founder move, first employee, warehouse, major investment or new owner. Those events can change foreign qualification, payroll, sales tax and federal classification. Formation is a dated decision supported by ongoing evidence—not a one-time certificate that makes every later activity compliant.

12 mistakes to avoid when opening an LLC

Most expensive LLC mistakes happen after a founder focuses only on the filing. Use this list as a final quality check before paying. If an answer is unknown, pause and verify it rather than copying a provider default.

• Forming in a fashionable state while actually operating elsewhere.
• Assuming state name acceptance equals trademark clearance.
• Using an address or agent without permission.
• Listing the wrong member or manager structure.
• Applying for the EIN before the state accepts the entity.
• Paying a fake government-looking website for a free EIN.
• Leaving the operating agreement unsigned.
• Mixing personal and company transactions.
• Missing initial reports, annual reports or franchise taxes.
• Believing an LLC automatically eliminates tax.
• Ignoring the owner's residence-country treatment.
• Depending on a provider dashboard as the only document archive.