What do AI tax research tools with citations cost?

AI tax research runs from $29 a month to several thousand dollars a year per user, and the price tracks the source behind the answer more than the AI itself. Every tool below answers with citations you can open; prices were read on the vendors' sites in October 2026 and link to the Tax Research & Knowledge Assistants listings.

Priced for a solo or small office

• CPA Pilot: $29/mo for 20 messages, $49 for 60, $119 for 150, $199 unlimited. Research plus return review, client emails, organizers and planning reports; pay for messages, not seats.
• Bizora: $29.99/mo Essential, $69.99 Pro (unlimited deep research), $119.99 Pinnacle. All 50 states, a View Steps reasoning trail, an Audit Research mode and an API from $0.24 a request.
• Hive Tax: $79/mo. Inline citations, multi-file uploads, memo drafting, a planning assistant and return analysis.
• Marble: free plan for solo practitioners; Pro $600/user/yr with 24 client intakes included.
• TheTaxBook WebLibrary Plus: $429 for the first user and $199 per additional user, with TaxBert answering from the library's own content.

Firm-grade, per user per year

• CoCounsel Tax (Thomson Reuters): $1,300/user/yr for Essentials. Checkpoint-backed cited answers, document analysis, a firm knowledge base, and the Ready to Review and Ready to Advise add-ons.
• Blue J: $1,498/user/yr. Conversational research with in-line citations, unlimited questions and uploads, memo drafting, agentic workflows.
• CCH AnswerConnect (Wolters Kluwer): $1,499 for the Tax package, with Expert AI answers and Document Analysis that reads IRS and state notices.
• Bloomberg Tax Research: Bloomberg Tax for Small CPA Firms from $2,200, an all-in-one package of research, news and workflow tools with the AI Assistant for firms under ten people.

Quoted

Checkpoint Edge, Tolley+ with Protégé (LexisNexis), TaxGPT and Avalara Tax Research (sales and use tax, with the Avi agent) are priced after a demo. Rightworks Spark AI comes at no additional cost with Rightworks hosting and explains GAAP and IRS rules rather than researching with citations.

What to check in the trial

Ask the same three questions of each tool and open every citation. The editorial libraries (Bloomberg, Checkpoint, CCH, TheTaxBook) cite their own analysis; the primary-authority tools (Blue J, Hive Tax, Bizora, Marble) cite the Code, regs and cases. A reviewer will want to know which.

Quick answers

What is the cheapest AI tax research tool with citations?

CPA Pilot at $29/mo for 20 messages and Bizora at $29.99/mo; Marble has a free plan for solo practitioners.

How much do the firm-grade AI research tools cost per user?

CoCounsel Tax Essentials $1,300/user/yr, Blue J $1,498/user/yr, CCH AnswerConnect $1,499 for the Tax package, and Bloomberg Tax Research's small-firm package from $2,200.

Which tools cover state tax research?

Bizora covers all 50 states, Blue J and Hive Tax answer federal and state questions, Marble has a SALT Matrix, and Checkpoint Edge has state charts; Avalara Tax Research is the sales-and-use-tax library.