Many LLC operating agreements can unintentionally end the S election status. An LLC operating agreement is similar to a corporation's articles of incorporation and bylaws. For tax purposes, a domestic multi-member LLC defaults to a partnership, and a single-member LLC defaults to a disregarded entity. These operating agreements typically follow state laws and partnership tax rules, which can conflict with S corporation rules.
One big issue is that an
S Corp can only have one class of stock. Operating agreements written with partnership tax law in mind often include provisions like capital accounts, which can cause an S election to fail.
If an LLC taxed as an S Corp has a defective agreement, its S election may be revoked, reverting the entity to a partnership or a C Corp. This is one disadvantage of S corporations. While defaulting to a partnership is generally better, it still poses issues like incorrect payroll and self-employment taxes. Fixing a defective S election requires a private ruling request to the IRS, which can be costly.