The four core formation documents
Almost every U.S. LLC needs the same baseline package, whether it's a single-member side business or a multi-member venture.
- Articles of Organization (filed with the state)
- Operating Agreement (internal — governs how the LLC runs)
- EIN confirmation letter from the IRS (for banking and taxes)
- Initial resolutions (opening accounts, appointing managers)
Why the operating agreement matters even for single-member LLCs
Most states don't require an operating agreement, but skipping it is a common mistake. The operating agreement is what proves your LLC is a separate legal entity — the entire point of forming one in the first place.
Without it, courts can disregard the LLC's liability protection ('piercing the veil') and creditors can come after personal assets.
After formation: the documents you'll need next
Once the LLC exists, a small set of supporting documents handles 90% of day-to-day operations.
- Bank resolution authorizing account openings
- Membership certificates (multi-member LLCs)
- Independent contractor agreements for vendors
- Master services agreement template for clients
- Confidentiality / NDA template for sensitive conversations
- Invoice template tied to the LLC's name and EIN
Common mistakes when forming an LLC
These four mistakes show up over and over and are easy to avoid:
- Signing contracts in your personal name instead of the LLC's
- Mixing personal and business bank accounts
- Skipping the operating agreement
- Failing to file annual reports or pay franchise tax
Frequently asked
- How long does LLC formation take?
- Most states process filings in 5–15 business days. Many offer expedited processing for an additional fee.
- Do I need a registered agent?
- Yes. Every state requires a registered agent with a physical in-state address to receive legal documents on behalf of the LLC.
- Can I form an LLC in a state I don't live in?
- Yes, but if you operate primarily in another state you'll also need to register there as a foreign LLC. For most small businesses, forming in your home state is simplest.
- Is an LLC always the right structure?
- Not always. Sole proprietorships, S-corps, and C-corps have trade-offs. The LLC is the most common choice for small businesses because it balances liability protection and tax simplicity.
LegalDocBuilder.com is a document preparation platform, not a law firm, and does not provide legal advice or representation. For complex matters, review your documents with a licensed attorney in your jurisdiction.