Working with clients in multiple states can create tax filing obligations beyond your home state. The answer depends on where your clients are, how much revenue you earn from each state, and sometimes whether you physically travel to those locations.

States use the concept of nexus to determine who owes them taxes. Nexus is the connection between your business and a state that gives that state the legal right to tax a portion of your income. Different states have different rules for what creates nexus. Some focus on physical presence like visiting a client site or attending meetings in person. Others have adopted economic nexus standards that look purely at revenue or transaction volume, regardless of whether you ever set foot in that state.

For consultants and service providers working remotely, the question often comes down to how much business you do in each state. If you’re a management consultant in Massachusetts with clients scattered across New England and a few larger engagements in other states, some of those states may claim a right to tax a portion of your income. The thresholds vary significantly. Accurate bookkeeping and tax services that track revenue by state make this much easier to sort out when the time comes.

Sales tax adds another layer of complexity. Most professional services aren’t subject to sales tax in most states, but the rules are inconsistent. Some states tax certain services that others don’t. If you’re uncertain whether your services are taxable in the states where you have clients, that’s worth verifying separately.

The practical takeaway is that this is worth reviewing rather than assuming you have no obligations. Many consultants operate for years without thinking about multi-state requirements, and that can become a problem. Proactive tax planning looks at where your revenue comes from and identifies any states where you may have filing requirements before they become expensive to fix.

If you’re working with clients in multiple states and haven’t reviewed your state tax situation, it’s worth a conversation. Every situation is different and the rules vary enough that general guidance only goes so far. Smart Outsourced Solutions serves consultants and service businesses across New England and nationwide, and Simona Leppala is a CPA and Enrolled Agent who can walk through your specific circumstances.