Professional Services & Consultants Bookkeeping in Connecticut

Whether professional services and consultants services are taxable in Connecticut is the question that catches people out — states differ enormously, and several have been broadening what counts. One of the few states requiring BOTH thresholds to be met, not either — so high-value, low-volume sellers often are not required to register. We code service revenue separately from any product revenue so the treatment is explicit rather than assumed.

Economic nexus in Connecticut is $100,000 in sales AND 200 transactions. For professional services and consultants, that threshold is the one to watch, because it is reached by selling into the state — no office, no staff, no physical presence required. Once you cross it you are expected to register with the Connecticut Department of Revenue Services and begin collecting. We track your Connecticut sales against it and tell you before you cross, not after.

Registering to do business in Connecticut runs through the Connecticut Secretary of the State, with tax accounts through the Connecticut Department of Revenue Services and employer accounts through the Connecticut Department of Labor. Connecticut treats these as wholly independent, so being in good standing with one says nothing about the others — and the sales tax account is the one that accrues a real balance while you are not looking.

The Connecticut statewide base rate is 6.35%. That sits mid-table nationally, with local rates layered on top and sourced to the delivery address rather than to your own location. Sourcing is where this is won or lost, and with economic nexus set at $100,000 in sales and 200 transactions, it becomes your problem the moment that threshold is crossed.