Tax season is one of the busiest times of the year for businesses—and one of the most dangerous.
Your accountant is overwhelmed. Your bookkeeper is under pressure. Your team is racing to meet deadlines while managing a flood of emails and document requests.
At the same time, cybercriminals are increasing phishing attacks, business email compromise (BEC), and financial fraud attempts.
This isn’t coincidence.
It’s strategy.
Why Hackers Target Businesses During Tax Season
From a cybersecurity standpoint, attackers look for high-risk behavioral conditions, not just weak systems.
Tax season creates:
- Increased email volume (higher chance of phishing success)
- Urgency-driven decision making
- Reduced verification processes
- Frequent sharing of sensitive financial data
This combination creates what security professionals call an expanded attack surface driven by human behavior.
The “Stressed Supply Chain” Effect
It’s not just accounting firms at risk.
Attackers target:
- Business owners
- Clients sending tax documents
- Vendors requesting payments
- Internal staff handling financial data
When everyone is moving fast, trust replaces verification—and that’s where breaches happen.
Common Tax Season Cyber Threats to Watch For
Modern phishing attacks are designed to blend into normal business operations.
Here are the most common threats:
1. Phishing Emails Disguised as Routine Requests
Emails that appear to come from your accountant or internal team asking for document resubmissions.
2. Vendor Payment Fraud (Business Email Compromise)
A vendor claims their bank account has changed and requests updated payment details.
3. Fake DocuSign or Secure Document Requests
Attackers mimic platforms like DocuSign to capture sensitive data or credentials.
4. CEO Fraud / Urgent Executive Requests
Emails impersonating leadership requesting urgent wire transfers or sensitive information.
Key Insight:These attacks succeed because they look normal—not suspicious.
Why Employees Fall for Phishing Attacks (Even Smart Ones)
This isn’t a training failure—it’s a cognitive overload issue.
During busy periods:
- People skim emails instead of reading carefully
- They rely on familiarity instead of verification
- They prioritize speed over security
Attackers exploit this by creating messages that:
- Feel urgent
- Appear routine
- Require quick action
They are engineered for decision fatigue environments.
4 Cybersecurity Best Practices for Tax Season
You don’t need enterprise-level tools to significantly reduce risk.
You need consistent, enforced habits.
1. Always Verify Payment Changes by Phone
Never trust email-only requests for banking changes.Use a known, verified phone number.
2. Treat Urgency as a Red Flag
If an email pressures immediate action, slow down.Urgency is a common phishing tactic.
3. Use a Second Communication Channel
Confirm sensitive or urgent requests via phone, Teams, or another trusted method.
4. Reinforce a “Pause and Verify” Culture
Give employees permission to slow down and question requests—especially during high-volume periods.
The Business Impact of Tax Season Cyberattacks
Failing to catch one of these attacks can lead to:
- Financial loss (wire fraud, payment diversion)
- Data breaches involving sensitive financial records
- Compliance violations (HIPAA, FTC Safeguards Rule, etc.)
- Cyber insurance claim denials due to lack of controls
For SMBs, these incidents are often operationally and financially disruptive.
The Bottom Line: Timing Is the Real Threat
Cyberattacks during tax season aren’t necessarily more advanced.
They’re just better timed.
The businesses that avoid incidents aren’t always the most secure—they’re the ones that recognize risk windows and adjust behavior accordingly.
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