Is it mandatory for a holding company to have an EIN? No, it is not. Sometimes you will only need an SSN to deal with all corporate tasks. The choice depends on the tax payment system you apply, and it differs for single-member LLCs (if they are considered “disregarded entities”) and sole proprietors, on the one hand, and multi-member LLCs that hire personnel, on the other hand. There are some cases where the choice is not limited: you can resort to either alternative, and it’s up to you to decide which one is more convenient. Interested in all the intricacies? Read our post to find out the details.