Grounded tax intelligence

Tax answers you can trace to the source.

Spak is a retrieval-grounded assistant for U.S. federal and California tax. Every answer is pulled from current IRS and FTB publications — and shows its citations, not a confident guess.

Ask a question See the stack retrieval · rerank · deterministic calc
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FastMCP · :8300
Grounded answer
Fed + CA
two jurisdictions, one answer
100%
answers carry a source citation
Deterministic
calculator, not a guessed number
Streaming
responses as they're composed
It shows its work

Ask in plain English. Get an answer with receipts.

Most chatbots will happily invent a tax figure. Spak won't. It retrieves the governing passage first, computes anything numeric with a deterministic calculator, and attaches the citation so you can verify it yourself.

Built for filers, advisors, and anyone tired of "consult a professional" as the only answer.

Do I pay California tax on a Roth conversion?
Yes. California taxes a Roth conversion as ordinary income in the year you convert — it conforms to the federal treatment, with no special state exclusion. The converted amount flows onto Schedule CA (540).
IRS Pub 590-A CA R&TC §17501
Under the hood

A retrieval stack built to be trusted.

Spak 2.0 rebuilds the original 2018 intent-classification bot as a modern RAG system. Every layer earns its place — retrieval, reranking, and a deterministic engine working in concert.

Build notes

Decisions, and the tradeoffs behind them.

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Put a question to it.

This preview runs on a general model. Production Spak retrieves the passages first and cites every source.

Answers appear here. Ask anything about federal or California tax.
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