UK Tax Compliance Made Simple
Submit VAT returns, self assessment, and payroll RTI directly to HMRC. Built to HMRC Making Tax Digital specifications, with all 19 fraud prevention headers.
Built for tax consultants, accountants, and payroll bureaus. OAuth 2.0 connected to HMRC sandbox; production access pending approval. Agent Services Account support.
Built for HMRC Making Tax Digital
Runox is built to HMRC Making Tax Digital specifications — OAuth 2.0 connected, all 19 fraud prevention headers. Production access application submitted to HMRC (March 2026); recognition pending.
Everything for UK Tax Compliance
Submit to HMRC with confidence. Every feature you need, nothing you don't.
HMRC OAuth Connection
Connect directly to HMRC via OAuth 2.0. Secure token management with automatic refresh.
VAT Returns (MTD)
Retrieve obligations, prepare returns, submit to HMRC. Full Making Tax Digital VAT compliance.
Self Assessment
Income Tax Self Assessment with quarterly updates. Self-employment, property, employment income.
Tax Calculations
Real-time tax calculations from HMRC. See exactly what your client owes before filing.
Payroll RTI
FPS and EPS submissions via Real Time Information. CSV upload, XML generation, HMRC submission.
Obligations Tracker
Never miss a deadline. Automatic sync of HMRC obligations with alerts and reminders.
Multi-Level Approval
Submissions go through approval workflows before HMRC filing. Solo, practice, and enterprise modes.
Fraud Prevention
All 19 HMRC-required fraud prevention headers. Complete audit trail.
What Runox Submits to HMRC
Three core submission types — all via direct HMRC API connection.
MTD VAT
- Retrieve VAT obligations from HMRC
- Pre-populate returns from accounting data
- Box 1-9 automatic calculation
- Submit returns to HMRC via API
- View return status and receipts
- Amend and resubmit if needed
- VAT group support
- Flat rate scheme support
MTD ITSA
- Quarterly update submissions
- End of Period Statement (EOPS)
- Final Declaration (crystallisation)
- Self-employment income
- Property income (rental)
- Employment income
- Interest and dividends
- Annual adjustments
Payroll RTI
- Full Payment Submission (FPS)
- Employer Payment Summary (EPS)
- Earlier Year Update (EYU)
- CSV upload with column aliasing
- XML generation and validation
- HMRC Government Gateway submission
- YTD employee tracking
- Bureau multi-client support
Making Tax Digital Timeline
Key dates your clients need to know. Are you ready?
Fraud Prevention Headers
HMRC requires all 19 fraud prevention headers on every API submission. Runox handles all of them automatically.
Device Information
Operating system, device model, screen dimensions, and user agent strings.
Client IP Addresses
IPv4 and IPv6 addresses of the originating client and any proxy servers.
Timezone & Locale
Client timezone offset, language preferences, and regional settings.
Connection Method
Whether submission is via desktop, mobile, server, or batch process.
User Identifiers
Hashed user credentials and government gateway identifiers.
Vendor Details
Runox's vendor ID, product name, version, and licence information.
Simple, Transparent Pricing
Tiered by client volume. All features included. No per-return charges.
Starter
- Up to 25 clients
- VAT filing (MTD compliant)
- Self Assessment (ITSA)
- Obligations tracking
- HMRC OAuth connection
- Submission history
Professional
- Up to 100 clients
- Everything in Starter
- Corporation Tax (CT600)
- Multi-level approval workflow
- Agent Services Account
- Client management dashboard
- Amendment detection & filing
Practice
- Up to 300 clients
- Everything in Professional
- Payroll RTI (FPS/EPS)
- CSV-to-RTI bulk conversion
- Bank statement categorisation
- AI tax planning
- Priority support
Enterprise
- Unlimited clients
- Everything in Practice
- White-label portal
- API access & SSO
- Custom integrations
- Dedicated account manager
- SLA guarantee
How Runox Tax Compares
vs HMRC Basic PAYE Tools, FreeAgent, and TaxCalc.
| Capability | Runox Tax | TaxCalc | Capium | FreeAgent |
|---|---|---|---|---|
| MTD VAT submission | ||||
| MTD ITSA (quarterly updates) | ||||
| Self Assessment filing | ||||
| Corporation Tax (CT600) | ||||
| Payroll RTI (FPS/EPS) | ||||
| CSV upload to RTI | ||||
| Multi-client / bureau mode | ||||
| Agent Services Account | ||||
| Multi-level approval workflows | ||||
| AI tax planning | ||||
| Integrated accounting | ||||
| Integrated payroll engine | ||||
| Multi-jurisdiction (UK + Africa) | ||||
| Pricing (100 clients) | £79/mo | ~£150/mo | ~£200/mo | N/A |
| Total | 14/14 | 7/14 | 8/14 | 3/14 |
Frequently Asked Questions
Ready for Making Tax Digital?
Get your clients MTD-compliant before the deadline. Start your free trial today. Full HMRC sandbox access included.
Questions? Email us at tax@runox.ai