It is confidently wrong
Standard AI produces plausible answers that are factually wrong. In tax, a confident wrong answer inside a client deliverable is a malpractice claim waiting to happen. A firm cannot stake its reputation on probability.
Tax Solutions · The regulated tax engine
One engine, the entire tax workflow
From classification to filing to audit defence. Every output grounded in the legal text as it stood on the transaction date, and defensible years after the decision was made.
In production at a top-10 audit and advisory firm
entry 01why this matters
Generic AI fails the audit test.
Three reasons a firm cannot put ChatGPT or Copilot into tax work — and the question every partner asks before signing off on any of it.
There is no audit trail
When the auditor asks where a number came from, you need an answer that holds. Generic AI is a black box — you cannot show your work, which makes the output unusable in anything that reaches a tax authority or an audit committee.
It cannot keep up with the law
Ministry letters, court rulings and EU directives land continuously. A rules-engine vendor ships on their cadence, not the law's, and your firm absorbs the gap by hand until the workaround becomes permanent.
The buyer's question: how do I get the productivity of AI without taking on liability my partners will not accept?
entry 02flagship
VAT first: every transaction, not a sample.
Flagship · Live
Your tax engine touches 100% of transactions but only applies the treatment it was configured with. Whether the characterisation is right — reverse charge, chain transaction, place of supply — is expert judgment, and nobody has the hours to examine everything. So everyone samples.
GraphBit puts that judgment into the validation layer: every transaction examined, ruled against the law in force on the transaction date, with the derivation attached.
1–5%of transactions receive substantive review of the characterisation today
40–150%penalty exposure across a European footprint, each jurisdiction with its own audit clock
100%examined by the engine, each with a verdict and a derivation
entry 03the rest of the suite
Same engine, same verdicts, across the tax function.
VAT is where most firms start. It is not where the engine stops — the same graph, guardrails and record apply from classification to filing to audit defence.
Transfer Pricing
Local File Generation
LiveLocal Files generated and validated to OECD standard. The platform reads your transaction matrix, detects the controlled transaction types, maps intercompany agreements to their matching benchmark studies, selects the right chapters per jurisdiction, and generates the file with method-specific narrative for your expert to review.
Verdict logicEach section is validated against the OECD local-file requirements for that jurisdiction. Missing inputs return as Requires review with the specific gap named — never filled with plausible narrative.
Customs Code
Validation
LiveTariff-code classification validated against the full legal corpus — TARIC, the Combined Nomenclature, HSEN and CNEN explanatory notes, and binding EBTI decisions. Free-text product descriptions matched through the legal hierarchy, not by resemblance.
Derivation per codeThe declared code is ruled Correct, Incorrect or Insufficient. Recommended codes are ranked, each carrying the section note, chapter note, explanatory note and EBTI precedent it rests on — traversed in the order the law requires.
Case · TK Content TK[Anonymised case: where a frontier model's classification ended in .90 and the derivation showed .00 — with the legal chain that proved it.]
Audit
Working Papers
LiveWorking papers assembled, referenced and defensible by construction. Dozens of documents per case — payslips, tax certificates, receipts, contracts, foreign authority letters — ingested in bulk across PDF, Excel, image and email, and classified into your firm's own categories.
Verdict logicClassification combines the graph with your firm's own rules. Uncertain documents are flagged for senior review before anything is finalised — never a silent decision. The consolidated working paper carries a full document trail behind every entry.
Financial Information
Extraction
Status TKFinancial data extracted from unstructured documents into validated, referenced structure. Statements, schedules and correspondence become fields your downstream systems can consume, with each value tied back to where it came from.
Verdict logicEvery extracted figure carries a reference to its exact source location. Anything that cannot be verified against the source document returns as Incomplete rather than inferred.
Status TK
Tax
Chatbot
Status TKConversational access to the knowledge graph. Your team asks a question in plain language and gets an answer drawn from the versioned legal text — not from a model's recollection of it.
Answer logicEvery answer cites the provision it rests on and the version in force. Where the graph has no basis for an answer, the system says so. It does not guess.
Status TK
VAT
Validation
Live · FlagshipSubstantive validation of 100% of indirect-tax transactions — reverse charge, chain transactions, place of supply — against the law in force on the transaction date.
Verdict logicEvery transaction ruled Correct, Incorrect, Requires Review or Incomplete, with the reasoning and legal derivation attached.
Read the full page →entry 04the shared spine
Four verdicts. Nothing waved through, nothing dumped on your team.
Every product in the suite returns the same four states, so a reviewer learns the system once and it holds everywhere. Correct answers get a verdict too — that is what makes the coverage claim real.
CorrectVerified against the applicable provision. The derivation is attached.
IncorrectThe treatment applied conflicts with the law in force on that date. The conflict is named.
Requires reviewThe case turns on judgment the engine will not make. It goes to an expert with the reasoning already assembled.
IncompleteThe input needed to decide is missing. The specific gap is named rather than filled.
Your experts receive findings, not workload. What the engine cannot verify against the law it hands over with the analysis already done — the reviewer rules on the question, not on the paperwork around it.
entry 05the clock
The authorities are about to see everything.
Every invoice becomes structured, machine-readable data. A systematic error then leaves the same footprint on every invoice, cross-matched at both counterparties.
2027–28National mandates
Germany phases in mandatory B2B e-invoicing for issuance; France, Poland and Belgium add reporting regimes.
July 2030ViDA, EU-wide
Digital reporting for cross-border transactions across the entire EU — every invoice structured and machine-readable.
AfterThe new baseline
Sampling stops being a defensible control. Validating every transaction becomes the standard your audit is measured against.
There is a law. There is a date. Validation stops being optional.
entry 06why you can trust it
Built for the standards your auditor demands.
ISO/IEC 27001 certified
Independent annual audit of our security controls — the standard your IT and procurement teams expect from any vendor handling client data.
TISAX assessed
Trusted Information Security Assessment Exchange, required by automotive manufacturers and among the strictest enterprise data security standards in Europe.
Compliant by architecture
Record-keeping (Art. 12), human oversight (Art. 14) and robustness (Art. 15) under the EU AI Act, implemented at platform level. Your use is defensible from day one.
Every action logged
Every classification, calculation and rule application is recorded with an immutable timestamp. Any past decision can be reproduced exactly, on demand.
Sensitive data stays with you
Personal and confidential data is tokenised inside your environment before any external model contact. Client data does not leave your compliance perimeter.
entry 07next step
Two hours. Your transactions. You leave with findings.
The working session: bring a sample of your real transactions and we run them live. No slideware — you leave with verdicts and the derivation behind each one.
Certified and assessed
ISO/IEC 27001TISAX0% framework-induced hallucination
Or start with the engine underneath: how GraphBit works →