Thomson Reuters UltraTax CS vs Avalara
An honest, context-aware comparison. No affiliate links. No paid placements. Just the data that helps you decide.
Thomson Reuters UltraTax CS
Professional tax preparation software for accounting firms (1040, 1120, 1065, 1041)
Avalara
Cloud-based sales tax automation and compliance software
Side-by-Side Comparison
Objective metrics, no spin.
For tax return preparation in public accounting firms. Essential for firms with >50 business returns annually.
For tax provision work (use OneSource), tax planning (use different tools), or if you're a sole proprietor (use ProSeries or Lacerte).
For any business selling in multiple states, e-commerce companies, or when managing sales tax manually becomes unmanageable.
For single-state businesses with simple sales tax or if your ERP already handles sales tax well.
Both suited for: medium, large, enterprise companies
Since both tools target medium and large and enterprise companies, your decision should hinge on the specific use case above rather than company fit. Try the AI Advisor to get a recommendation tailored to your exact stack.
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Other Tax Compliance Tools to Consider
If neither is the right fit, these are the next best alternatives in the same category.