For small companies and the accountants who serve them. The self-serve tool runs entirely in your browser — upload your transactions, confirm how each line is classified, get a draft computation with the loss carry-forward schedule and the Form C-S box map. Your file never leaves your machine. For messier cases — folders of PDFs, full ledgers — book a live session and watch the full pipeline produce a computation in about ten minutes. Everything here is a first draft for professional review, not tax advice.
Try the tool — free, in your browser →Book a live demo
| Self-serve | aitax.sg/tool — no login, no upload, no API. Small companies, roughly ≤50 transactions. |
| Verified | The engine passes 10/10 externally verified computations — university model answers and an expert-reviewed real client case — plus refusal tests. Source and test suite are public. |
| Won't do | Foreign income, related-party loans, group relief, GST — it abstains and tells you why, instead of guessing. |
| Price | Free while it proves itself. Pilot pricing later. |
Every change to the computation engine must exactly reproduce a golden suite of externally verified cases before it ships: three university model answers, a client computation reviewed line-by-line by a Big-4 senior tax manager, and synthetic edge cases checked against IRAS published rates. The suite and engine are open source — you can read the tests yourself.
In the browser tool: nothing leaves your machine — parsing, classification, and computation are JavaScript in your tab. In a live demo: bring questions, not client documents; this deployment doesn't accept client data.
Built in Singapore by Kuan, who also wires AI into professional firms' actual workflows at Workflow Lab. AI drafts; humans decide.
There was. The previous homepage — an AI bound for millennia with only the Income Tax Act — is preserved at /lore. Its one rule still applies: verify the work.