Bank-grade security for sensitive data — Sage, Xero, QuickBooks, SAGA
Accounting firms process other companies' financial data. A single ransomware attack means instant losses, GDPR fines and lost clients. We build defence in depth, specifically for accountants.
GDPR & UK DPA compliant
Daily immutable backup, enterprise EDR, 2FA on everything that matters, quarterly audit.
Common problems
The real risks for an accounting firm
"Ransomware encrypted Sage databases for all clients"
A single click on a phishing email and all accounting databases are locked. If backup isn't isolated, it's encrypted too. Manual reconstruction is impossible — clients sue you.
"I lost the VAT return 2 days from the HMRC deadline"
The accountant's machine died with no centralised backup. Documents in local Excel, electronic seals on personal USB, all lost. Penalties arrive within 30 days.
"A former employee still has access to client data"
Former employees' accounts stay active for months. Old VPNs, network drives, Google accounts — all accessible. Without access auditing, you never know who sees what.
"ICO is asking for GDPR documents I haven't prepared"
You process financial data for hundreds of companies — you're a serious GDPR controller. Missing a Record of Processing can bring a fine of 4% of turnover.
Complete solutions
Recommended tech stack for accounting
Layered security plus your specific integrations (HMRC, MTD, Sage) — all under a single managed contract.
Centralised Sage/Xero server
We migrate databases from individual machines to a centralised server with automatic backup. One single source of truth, accessible to all accountants.
- Sage 50 Server or Xero Multi-user
- Licensed SQL Server Standard
- Per-user controlled access
Daily immutable backup
Automatic end-of-day backup to cloud, encrypted and immutable (anti-ransomware). Restore within 15 minutes to any point in the last 90 days.
- Veeam Backup + Wasabi Cloud
- WORM backup (Write Once Read Many)
- Monthly restore testing
Anti-ransomware EDR
SentinelOne uses AI to detect ransomware behaviour before encrypting files. Automatically blocks and rolls back to the previous state.
- SentinelOne EDR Enterprise
- Automatic rollback
- Quarantine suspicious files
2FA on EVERYTHING
Mandatory two-factor on email, VPN, RDP, HMRC, MTD portals. Phishing becomes useless — the attacker can't get in without your phone.
- Microsoft Authenticator
- Hardware YubiKey on critical accounts
- Microsoft 365 SSO
Complete GDPR compliance
Mandatory documentation for accountants: Record of Processing, DPIA, processor contracts with clients, breach notification procedures.
- Custom GDPR policies
- Optional outsourced DPO
- ICO response within 72h
HMRC & MTD integration
Automatic connection to HMRC, cloud electronic signatures, automatic VAT submission via Making Tax Digital.
- HMRC token backup
- MTD-ready Sage/Xero setup
- Full audit trail on returns
Real case
From "we're on quicksand" to full compliance
Total security hardening + immutable backup
Problem: A similar firm in their network lost all client data after a ransomware attack. Backup was on a NAS connected to the network — also encrypted. Clients sued the accountants. The firm shut down in 6 months.
Our audit found:
- Free antivirus on all workstations (didn't detect modern ransomware)
- Backup on permanently-connected NAS — vulnerable
- Microsoft 365 without 2FA on any account
- 2 former employee accounts still active
- Zero GDPR documentation (controller for 84 firms)
Implementation in 4 weeks: SentinelOne EDR on all machines, Wasabi immutable backup (offsite, WORM, 90-day retention), mandatory Microsoft 2FA, disabled inactive accounts, complete Record of Processing + processor contracts with all 84 clients. Security Awareness Training for all accountants.
Result: 14 months without incidents. They won 3 new corporate clients precisely because of the GDPR documentation. The 2026 supervisory authority inspection passed with no observations.
Free Audit
Are you ready for an ICO inspection?
We send an engineer with experience in accounting firms. Checks backup status, EDR configuration, former employee accesses, and GDPR compliance. You get a written report with prioritised remediation plan.
- 2-3 business days
- Free, no obligations
- NDA with fiduciary confidentiality clauses
- Written report + GDPR checklist
Request a free IT audit
We reply within 24 hours.