Check the LLC operating agreement. If the LLC has an operating agreement, it will likely include a clause that outlines the procedures for admitting new members who contribute sweat equity.
Establish terms of the new member’s interest. The LLC structure is quite flexible in that the rights of each member need not be the same. Therefore, you must reach an agreement with the prospective member as to his percentage of ownership, rights to distributions and allocation of profits.
Obtain consent from current members. If the operating agreement is silent on the procedures for admitting new members, the laws of the state in which the LLC operates will apply by default. Most states require that all current members of the LLC consent to the admission of a new member; however, the operating agreement may not require all members' consent.
Draft a contract with the new member. The new member’s promise to provide sweat equity to the LLC should be written in a legally enforceable contract. A valid contract must outline the type and length of service the new member is promising, all terms that relate to the new member’s share of profits and distributions, and the signatures of the new member and a current member or manager who is authorized to sign for the LLC.