When do you need a NEW EIN? (And when you don't)

EINs stick to the entity, not the business idea. That single principle sorts almost every case: if the legal entity is the same, the EIN stays; if a new entity now runs the business, it needs a new number.

You typically DON'T need a new EIN when…

You change the business name (report it to the IRS, keep the number). You move, even across states. You add a DBA or open new locations. An LLC elects S-corp or C-corp taxation, tax elections change how the same entity is taxed, not what it is. You add or remove LLC members in most cases.

You typically DO need a new EIN when…

A sole proprietorship incorporates or forms an LLC, the new entity is a new taxpayer. A partnership incorporates. A corporation receives a new state charter. You purchase an existing business and run it as a new entity rather than continuing the old one. A sole proprietorship takes on partners and becomes a partnership.

The gray areas are real, mergers, statutory conversions between states, and trust changes have case-specific rules, and this article is general information, not tax advice. When the answer materially affects taxes, a CPA is the right call.

If your situation lands in the 'new EIN' column, that part we make easy: prepared and filed for you as a private third-party filing service.