Every June, accounting firms across Sydney run at full capacity. Staff are working longer hours, systems are under heavier load, and deadlines are not negotiable. ATO lodgements, BAS returns, payroll runs, EOFY reporting, it all hits at once.
This is the worst time for a system to go down. It is also the most likely time for something to break, because everything is running harder than it does for the other eleven months of the year.
If your IT was set up a few years ago and has not been reviewed since, tax season is the moment that exposes every gap. Here is what accounting firms need to have in place, and why getting your IT reviewed before June is better than scrambling after something fails.
Your Data Makes You a Target
Accounting firms hold exactly the kind of data cybercriminals are looking for. Tax file numbers, bank account details, ABN records, payroll information, financial statements, it is all high-value for identity fraud and financial crime.
The ACSC has repeatedly flagged professional services firms, particularly accounting and legal, as priority targets for ransomware and business email compromise. An attacker who gains access to an accounting firm’s systems does not just get one person’s data. They get the financial records of every client on the books.
Clients are increasingly asking their accountants what security controls are in place. If you cannot answer that question clearly, it affects trust, and trust is the foundation of every client relationship in accounting.
Tax Season Pressure Exposes IT Gaps
During tax season, your systems carry a heavier load. More users logged in at the same time. Larger files being processed. More data moving between your practice management software, the ATO portal, and client systems.
IT that performs adequately for most of the year can slow down, freeze, or fail under this sustained pressure. A server that was “fine” in February chokes in July. Backup jobs that ran overnight now overlap with early-morning staff logins. Internet bandwidth that was sufficient for ten concurrent users struggles with twenty.
These are not dramatic failures. They are slow-burn problems that eat into productivity when every hour counts. Staff waste time waiting for systems, rebooting machines, or working around glitches they have learned to tolerate.
The pattern is predictable: survive tax season, promise to fix IT afterwards, get busy with other things, and arrive at the next tax season with the same problems. Breaking that cycle starts with a proper review before the pressure hits. Our free IT Security Audit Checklist for Accounting Firms walks through the controls clients and the ATO expect you to have in place.
What Controls Matter for Accounting Firms
The Essential Eight, eight security strategies recommended by the Australian Government’s ACSC, provides the practical framework. Here are the controls that matter most for accounting practice environments.
Multi-factor authentication everywhere
Multi-factor authentication (MFA) requires a second verification step when logging in, like a code sent to your phone. Every account that touches client data needs MFA enforced. No exceptions. This is the single most effective control against credential theft.
Patching on a managed schedule
Patching means applying software updates, especially security updates that fix known vulnerabilities. For accounting firms, patching needs to happen on a schedule that does not disrupt tax season workflows. Critical patches within 48 hours. Everything else within two weeks. Managed, not ad-hoc.
Backup with tested restores
Your client data needs to follow a 3-2-1 backup strategy: three copies, two different media types, one stored offsite or offline. And those backups need to be tested, actually restored and verified. A backup you have never tested is an assumption, not a safety net.
Endpoint detection and response
Endpoint detection and response (EDR) monitors every device on your network for suspicious behaviour and can isolate a compromised machine before a threat spreads. Standard antivirus is not sufficient for the data accounting firms handle. EDR is the current minimum standard.
Why AppCare Matters for Xero and MYOB
Accounting firms run on practice management software, Xero Practice Manager, MYOB, HandiSoft, or similar. These applications need specific attention that generic IT support often misses.
Updates need to be applied without breaking integrations. ATO connectivity needs to be monitored. Performance issues during high-load periods need to be identified before they become outages.
CIO Tech’s AppCare service provides dedicated management for your line-of-business applications. We handle updates, monitor integrations, and resolve issues with engineers who understand the software, not just the server it runs on.
Get Reviewed Before June, Not After
The best time to review your IT is before tax season, not during it and not after it. A review now gives you time to close gaps, upgrade what needs upgrading, and go into EOFY with confidence that your systems will hold up.
CIO Tech’s IT Audit is a structured review of your entire environment: security controls, backup verification, patching status, access management, and application health. You get a plain-English report that tells you exactly where you stand and what to prioritise.
For ongoing management, CIO Tech Assured: Business covers everything an accounting firm needs: Security Stack, AppCare for your practice software, patching, backup monitoring, and a Sydney-based support team who understand the seasonal pressure of an accounting practice.
Do Not Wait for Tax Season to Find the Gaps
Every year, accounting firms discover IT problems at the worst possible time. The server slows down during lodgement week. A backup fails and nobody noticed. A phishing email gets through because email security was never configured.
These are preventable problems. A review before June, not after, is the difference between a stressful tax season and a manageable one.
