Interstate Commerce Simplification Act Redefines 'Solicitation': New Tax Risks for Multi-State Businesses

The Interstate Commerce Simplification Act of 2025 aims to overhaul how states determine which out-of-state businesses owe them taxes. By amending Section 101(d) of Public Law 86-272, the bill introduces a new, broader definition for the term “solicitation of orders.” Under this proposal, any business activity that facilitates an order—even if that activity serves a completely different, independent business purpose—counts as solicitation. This is a technical shift with massive real-world implications for anyone selling products across state lines, as it potentially strips away long-standing federal protections that kept states from taxing businesses that don't have a physical storefront or office in their jurisdiction.

The 'Dual-Purpose' Trap

Currently, federal law protects businesses from state income tax if their only activity in a state is asking people to buy their products (solicitation). This bill changes the game by stating that if an activity helps get an order, it counts as solicitation, regardless of its other functions. Imagine a small clothing brand based in Nashville that sends a representative to an Atlanta trade show to research fashion trends. If that representative also happens to hand out a flyer or answer a question that leads to a sale, Georgia could argue that the entire trip was a 'solicitation' effort. Because the bill includes activities that serve an "independent business purpose," the lines between market research, customer service, and sales become dangerously blurred. For a business owner, this means activities you thought were 'safe' could suddenly trigger a tax bill from a state where you don't even have a desk.

Compliance Chaos and the Cost of Doing Business

The biggest hurdle here is the high level of vagueness regarding what "facilitates" means. For a software company or a specialized manufacturer, does providing technical support facilitate a future order? Does a delivery driver mentioning a new product line count? Because the bill doesn't provide a specific checklist, state tax authorities are essentially given a blank check to interpret these rules. For a mid-sized company operating in ten different states, this could mean hiring a small army of accountants just to track every employee's conversation to ensure they aren't accidentally creating a new tax liability. These administrative costs don't just hurt the bottom line; they often get passed down to consumers in the form of higher prices.

Shrinking Protections for Small Players

While the bill is framed as 'simplification,' it may actually erode the legal shield that has allowed small and medium-sized businesses to grow nationally without fearing a 50-state tax nightmare. By broadening the definition of solicitation, the bill makes it easier for states to claim jurisdiction over companies that have minimal physical presence. While state governments might see this as a way to capture more revenue, the reality for a small business owner is a complex web of new regulations and potential audits. If you’re running a business from your garage or a small warehouse and shipping nationwide, the legal fees to prove your activities weren't solicitation could end up costing more than the taxes themselves.