Lacerte vs UltraTax CS (2026): Speed vs Suite

This is Lacerte's signature. Its worksheet-based input is built for speed, and a preparer who knows it well can move through a complicated return faster than in any other suite we have tested. UltraTax is efficient in skilled hands too, but its dense interface does not reach the same pace. The catch is that Lacerte's speed is earned, since the input sheets take real time to master.

UltraTax's data sharing between related returns is a genuine differentiator. Enter information once for a family group or a tiered entity structure and it flows where it needs to go. Lacerte handles each complex return well, but for firms whose clients come in connected groups of individuals, partnerships, and trusts, UltraTax saves more time across the whole relationship.

UltraTax's mature review tools suit firms with a structured preparer and reviewer workflow, and the rest of the CS Professional Suite supports that process with connected document and practice management tools. Lacerte's diagnostics catch a lot before review, but its surrounding firm workflow is less developed. The more preparers and review layers a firm has, the more this matters.

UltraTax sits at the center of the CS Professional Suite, with native connections to document management, practice management, and fixed asset tools, and Thomson Reuters also offers Virtual Office CS for firms that want the vendor to host it. A firm that buys in fully gets returns, source documents, and billing in one connected system. Lacerte is a strong tax engine with a lighter ecosystem around it, so firms assemble more of their workflow from separate products.

Lacerte connects cleanly with QuickBooks, a real advantage for firms whose clients keep their books in the Intuit world. Its large, experienced user base also makes it easier to hire preparers who already know the software and to find answers to unusual questions. UltraTax has a strong following of its own among larger firms, but for a firm hiring experienced help and working with QuickBooks clients, Lacerte has the edge.

Neither suite is the value pick. Lacerte pairs a premium license with per-return fees on many configurations and annual increases that long-time users complain about. UltraTax is modular, quotes are individual, and the total climbs as firms add CS Professional Suite pieces, so the renewal deserves a close look every year. Which one costs less depends on your return volume and how much of each ecosystem you buy, so we score it even.