Trust is built in
Bank-first security. Reviewable control. Built for accountability.
xontax is designed so the important decisions remain visible and reviewable. Your bank data is the source of truth, and you can amend what you approve before anything is used in your filing workflow.
You can always verify and amend
AI suggestions are explainable and reviewable. Important decisions stay under your control.
Security is about control, not theatre
We focus on transparency over black-box behaviour: what’s suggested, what it’s based on, and what you can change.
Security / trust principles
Bank-first source of truth
Decisions are anchored to your bank transactions rather than reshaping history.
Immutable raw inputs
Raw statement lines stay intact so auditability stays grounded in real data.
Review before submission
AI suggests. You verify, amend, and approve what’s used next.
Bank-first and immutable data
Your bank transactions are the source of truth. xontax preserves raw statement lines as immutable input and keeps the workflow grounded in what actually happened.
Why this matters
It reduces drift that comes from spreadsheet and ledger-first re-entry, and it makes decisions easier to explain later.
Audit trail and reviewability
AI suggestions are visible and explainable. The workflow is designed so you can understand what was suggested, what it was based on, and what you can amend before anything becomes part of your submission workflow.
Explanations are designed for human verification
Important decisions are traceable to the original bank input
You can change or amend before approval
Accountability stays human
AI helps with high-confidence work, but the system is structured for review and control.
Transaction
Card purchase · Business supplies
19/02/2026
AI suggestion
Match to an expense bill line
Extracts the likely receipt details and proposes a coding decision with an explanation you can verify.
AI explanation (readable)
Why we suggest this
- The description matches a business supplies pattern.
- The extracted details align with the receipt you reviewed.
- Review is required before it becomes part of your filing workflow.
You stay in control
Amend decisions anytime. Your audit trail stays tied to the original bank data.
AI control model
xontax is AI-assisted, not unaccountable automation. For items that need judgement, the workflow surfaces them for review checkpoints—so you decide what becomes part of your accounting and filing workflow.
High-confidence work
AI can reduce manual effort, while keeping the outcome reviewable.
Sensitive / uncertain items
Uncertain points are surfaced for explicit user verification.
Final control
You can amend decisions before outcomes progress in your workflow.
Compliance and operational seriousness
xontax helps you prepare reviewable workflow data for UK reporting workflows, with deadline-aware structure for MTD ITSA 2026 preparation. We keep the process explicit: prepared data is reviewable, and approval stays with you.
Filing workflow
Prepared, reviewable, and deadline-aware
xontax prepares the data from your reviewed decisions. You approve the final step.
xontax maps your review decisions into filing-ready structure.
Uncertain items are surfaced so you can confirm what should be used.
Once you approve, the outcome becomes part of your submission workflow.
You can see what’s coming up, so you’re not scrambling at the last moment.
No hand-wavy assurances
This page is about how the workflow stays accountable and reviewable. It’s not a certifications or approvals page.
Data handling and privacy-conscious messaging
xontax handles the minimum data needed to run your bank-first bookkeeping workflow and produce reviewable explanations and filing-ready structure. We focus on clarity so you can understand what the system is doing and why.
Trust comes from transparency: you can see suggestions, trace decisions to bank input, and amend before approval. Secrets and sensitive integrations are handled server-side.
You’re not locked in
The workflow is designed for change. If something doesn’t match your records, you can correct it and keep the audit trail grounded in your bank data.
Ready to review with your own bank data?
Start free, review first
See the review checkpoints and explainable suggestions with your own transactions—then decide when to commit.
The AI does the work. You keep final control—reviewable, amendable, audit-friendly.