VAT returns, Self Assessment, Corporation Tax and payroll RTI for 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.
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.
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.
Making Tax Digital for Income Tax 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 for Real Time Information. CSV upload and XML generation; HMRC recognition for RTI follows Corporation Tax.
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. Complete audit trail.
CT600 with the CT600A, CT600C and CT600L supplementary pages, iXBRL accounts and computations. File one company at a time, or prepare returns for all clients in a batch.
Prepare statutory accounts in iXBRL (FRS 102 and FRS 105) from the same figures as the CT600, ready for software filing.
Value benefits in kind (cars, fuel, vans, loans, accommodation) at the current HMRC rates and compute the P11D(b) Class 1A NIC.
P60 certificates, P45 leavers, statutory pay (SMP/SSP) and pension auto-enrolment assessment.
Income and expense ledger, receipt capture and a business mileage log, kept digitally as MTD requires.
Upload CSV or OFX statements and categorise transactions into the tax return.
Send returns for client sign-off before filing, with a practice dashboard and RAG status across every client.
AI-assisted tax planning and pre-submission review that flags enquiry risks before you file.
VAT and Income Tax through HMRC's APIs; payroll and Corporation Tax through HMRC's Transaction Engine.
HMRC recognition for RTI starts once Corporation Tax recognition is complete.
In HMRC recognition: returns are accepted by HMRC's External Test Service.
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