Submit VAT returns, self assessment, and payroll RTI directly to HMRC. Full Making Tax Digital compliance with all 19 fraud prevention headers.
Built for tax consultants, accountants, and payroll bureaus. OAuth 2.0 connected to HMRC. Sandbox and production environments. Agent Services Account support.
Runox is fully compliant with HMRC Making Tax Digital requirements. OAuth 2.0 connected, all 19 fraud prevention headers. Production credentials application submitted March 2026.
Submit to HMRC with confidence. Every feature you need, nothing you don't.
Connect directly to HMRC via OAuth 2.0. Secure token management with automatic refresh.
Retrieve obligations, prepare returns, submit to HMRC. Full Making Tax Digital VAT compliance.
Income Tax Self Assessment with quarterly updates. Self-employment, property, employment income.
Real-time tax calculations from HMRC. See exactly what your client owes before filing.
FPS and EPS submissions via Real Time Information. CSV upload, XML generation, HMRC submission.
Never miss a deadline. Automatic sync of HMRC obligations with alerts and reminders.
Submissions go through approval workflows before HMRC filing. Solo, practice, and enterprise modes.
All 19 HMRC-required fraud prevention headers. Fully compliant audit trail.
Three core submission types — all via direct HMRC API connection.
Key dates your clients need to know. Are you ready?
HMRC requires all 19 fraud prevention headers on every API submission. Runox handles all of them automatically.
Operating system, device model, screen dimensions, and user agent strings.
IPv4 and IPv6 addresses of the originating client and any proxy servers.
Client timezone offset, language preferences, and regional settings.
Whether submission is via desktop, mobile, server, or batch process.
Hashed user credentials and government gateway identifiers.
Runox's vendor ID, product name, version, and licence information.
Tiered by client volume. All features included. No per-return charges.
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 |
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