About OpenAccountants
AI is doing tax work. Who verifies the rules it follows?
OpenAccountants is an open-source library of tax skills for AI agents, verified by licensed accountants in the jurisdictions they know. Public users can use the skills, accountants maintain the rules, and developers keep the source open on GitHub.
The problem
Tax LLMs are already being asked to classify transactions, compute filings, explain deductions, and assemble workpapers. But general AI models do not carry a reliable, current, jurisdiction-specific map of tax law.
Tax has thresholds, cliffs, state differences, VAT exceptions, filing deadlines, source citations, and edge cases. A confident answer that is wrong is not a product bug. In tax, it is a trust failure.
The missing layer is verified tax knowledge: readable rules that any AI agent can use, maintained in the open, and signed off by qualified practitioners.
OpenAccountants exists to build that layer. Skills are markdown files that encode tax logic with references. Accountants verify them section by section. Their names and jurisdictions are visible, so trust is attached to people, not a black box.
We realised the rules themselves — rates, thresholds, classification logic, statute citations — should be open. Platforms and developers should not need to pay for access to what the law says.
OpenAccountants is the open-source knowledge layer. The skills are free, the verifications are public, and the accountants who sign off on them are named.
Why tax LLMs need verification
AI is not a future thing. People are already pasting bank statements, invoices, payroll data, and tax questions into AI tools. The tools can reason well, but reasoning over bad or incomplete tax knowledge still produces bad answers.
The answer is not to pretend AI will stop doing tax work. The answer is to give AI agents rules that accountants can inspect, correct, verify, and stand behind.
That is the role of OpenAccountants: make the knowledge AI runs on visible, jurisdiction-aware, and professionally verified.
What we believe
Our network
A growing network of accountants across jurisdictions — verifying skills and making AI-generated tax work safe.
3
Countries active
1
Accountants
6
Recruiting
ACCA
Association of Chartered Certified Accountants
CPA
Certified Public Accountant
ICAEW
Institute of Chartered Accountants in England and Wales
AICPA
American Institute of CPAs
This is bigger than one team
Today the network spans US, European, and international practitioners. But there are dozens of jurisdictions and entire accounting domains — VAT, payroll, audit — that need people who know the rules.
If you're a licensed practitioner who takes AI seriously — whether you're already using it daily or just starting to explore — there's a place for you here.