Registration, licensing, and tax nexus are three different questions

Because "doing business" means something different to each of them.

This is the confusion underneath most multi-state questions, and answering one and assuming you've answered all three is how people end up with unexpected obligations.

Registration with the Secretary of State

• Whether your entity must register as a foreign entity in a state. Turns on that state's definition of transacting business, which usually focuses on physical presence, employees, and regular activity.

• Consequence of getting it wrong: fees, penalties, and inability to bring suit there until you register.

Licensing

• Whether you need permission to do your particular work in that state. Contractors, insurance producers, real estate professionals, healthcare providers, and many others.

• Entirely separate from entity registration. You can be properly registered and still be operating without a required license, or licensed and unregistered.

• Consequence of getting it wrong: potentially unenforceable contracts, penalties, and licensing action.

Tax nexus

• Whether you owe tax there, and which taxes. Income tax nexus and sales tax nexus are themselves different questions with different thresholds.

• Sales tax nexus in particular can attach on sales volume alone, without any physical presence.

• Consequence of getting it wrong: back tax, penalties, and interest.

Why one answer doesn't cover the others

You can owe sales tax in a state where you don't need to register your entity. You can need a license in a state where you owe no income tax. You can be registered and still be missing both.

The practical approach

For every state you touch, ask all three questions separately. Where do I have people, property, or activity? What am I selling and how much? Does my work require permission here?

What to do

List every state where you have any connection. Then run all three questions against each one.

It's tedious once and much cheaper than discovering a gap during a sale.

This is general information, not legal advice for your situation. If you want an answer for your business, book a consultation.