Terms & Conditions
Effective Date: 1st March 2026
1. Introduction and Acceptance of Terms Welcome to xontax ("we," "our," "us"). By registering for, accessing, or using the xontax platform ("Service"), you ("User," "you," or "your") agree to be bound by these Terms & Conditions. xontax is a business-to-business (B2B) Software-as-a-Service (SaaS) platform designed to act as an AI-powered financial controller and Making Tax Digital (MTD) compliance tool for UK sole traders and limited companies. If you do not agree to these terms, do not use the Service.
2. Nature of the Service and Agentic AI xontax is an Accountancy Service Provider (ASP) and tax technology platform, not a traditional accountancy firm.
AI-Led Bookkeeping: The Service uses artificial intelligence (including large language models) to categorize transactions, extract data from receipts, and suggest tax treatments.
Human Verification: The Service operates on an "AI-led, human-verified" model. While the AI automates suggestions, you remain strictly and legally liable for the accuracy, completeness, and validity of all financial data and tax returns submitted to HM Revenue & Customs (HMRC) or Companies House through the Service.
3. The "Bank-First" Source of Truth xontax operates a strict "bank-first" architecture.
TrueLayer Integration: You must connect a valid UK business bank account via our Open Banking partner, TrueLayer.
Immutability of Records: You acknowledge and agree that raw bank statement lines imported into xontax are permanently immutable. You cannot manually edit, delete, or alter raw bank data within the platform. This is to ensure a perfect, tamper-proof audit trail.
One-to-One Mapping: Every transaction must map to exactly one explanation, bill, or invoice.
4. Continuous Filing and Autosave xontax is designed with progressive, continuous data states. The platform does not use "Save" buttons. Any changes, categorizations, or receipt matches you make, or that you accept from the AI, are immediately autosaved to your ledger. Your account is in a state of continuous filing preparation.
5. HMRC Making Tax Digital (MTD) Compliance
Direct Submissions: xontax interfaces directly with HMRC APIs for VAT and Income Tax Self-Assessment (ITSA).
MTD Deadlines: The platform will surface statutory deadlines. However, it is your sole responsibility to ensure that your bank feed is active, exceptions are cleared, and submissions are executed before HMRC deadlines.
Late Penalties: xontax accepts no liability for late filing penalties, interest, or surcharges imposed by HMRC due to your failure to review and submit data on time, or due to disconnected Open Banking feeds.
6. Fees, Subscriptions, and Cancellation
Access to xontax filing capabilities requires an active, paid subscription.
Termination: You may cancel your subscription at any time. Upon cancellation, your TrueLayer bank feed and HMRC connection will be immediately revoked.
Data Portability: Upon termination, you are entitled to a full export of your transaction history and uploaded documents. You remain responsible for retaining your accounting records for the statutory 6-year period required by HMRC.
7. Limitation of Liability and Indemnification To the maximum extent permitted by UK law, xontax shall not be liable for any indirect, incidental, special, consequential, or punitive damages, including loss of profits, data, or goodwill, arising from:
- Errors or omissions in AI-generated tax suggestions (e.g., Capital Allowances, R&D credits, VAT treatments).
- Temporary downtime of third-party APIs (TrueLayer, Companies House, HMRC, Anthropic, AWS, etc.). You agree to indemnify and hold xontax harmless against any claims, fines, or investigations by HMRC resulting from your use of the platform.
8. Governing Law These Terms shall be governed by and construed in accordance with the laws of England and Wales.