How to add a co-founder to my LLC
Adding a member is a state filing — usually called an Amendment. FormifyAI handles the paperwork; you handle the operating agreement update.
Adding a co-founder turns your single-member LLC into a multi-member LLC. There are three things that change: the state filing, the operating agreement, and your IRS classification.
1. The state filing
Most states require an Amendment to your Articles of Organization adding the new member. Some states (NH, MA) don't require it because members aren't listed publicly. Open your entity in the dashboard and pick Amendment → Add Member; we'll generate the right filing for your state.
2. Operating agreement update
Update your operating agreement with: the new member's ownership %, capital contribution, voting rights, and how distributions split. This is internal — you don't file it with the state, but every member must sign.
3. IRS classification change
Single-member LLCs are taxed as sole props by default. The moment you have two members, the IRS treats you as a partnership and you must file Form 1065 (partnership return) annually. Tell your accountant — and consider whether S-Corp election makes sense at the new income level.
Don't forget the EIN: if your single-member LLC didn't have one, you'll need one now (multi-member LLCs require an EIN). We can file the SS-4 for you — it's free.
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