Why Tax Season Is Open Season for Phishing Attacks on Accountants
March means the busiest time for accountants.
Your accountant is buried. Your bookkeeper is scrambling. Deadlines are looming, and emails are coming faster than anyone can keep up with.
Everyone’s focused on getting through the month.
And cybercriminals know it.
Tax season phishing attacks on accountants spike every year because attackers understand exactly how busy accounting firms and finance teams become during this time. Security researchers consistently observe an increase in tax-themed phishing emails throughout March, based on some studies showing a nearly 28% increase compared to quieter months.
These messages aren’t dramatic or obvious scams. They’re designed to look like normal business communication — arriving right when people are moving fast and paying the least attention.
That’s not a coincidence.
It's a strategy.
Understanding how tax season phishing attacks on accountants work can help your firm avoid becoming an easy target during the busiest time of the year.
The Stressed Supply Chain Around Accounting Firms
One of the biggest misconceptions about cybercrime during tax season is that hackers only target accounting firms.
In reality, they target everyone around them.
During tax season:
- Clients rush to send sensitive financial documents
- Staff members shortcut normal verification checks
- “Just send me the file” replaces normal caution
- Internal verification steps get skipped because everyone is overloaded
The entire system speeds up.
And speed is where mistakes happen.
Hackers don’t usually go after calm, methodical organizations. They look at environments where people are rushed, distracted, and overwhelmed.
March is exactly that.
This is why tax season phishing attacks on accountants and their clients become far more common during this time of year.
What Tax Season Phishing Attacks on Accountants Actually Look Like
These attacks don’t look like the scams you see in movies.
They look like normal emails.
Messages that look like they come from trusted contacts or familiar services are the most effective. Common examples include:
- An email from “your accountant” asking you to re-send W-2s because the file didn’t arrive
- A vendor message claiming their bank account information has changed
- A DocuSign request for a tax document that “needs your signature today”
- An urgent message from “the CEO” that says he or she need help immediately while traveling
None of these requests seem unusual during tax season.
In fact, they look exactly like the types of emails people expect to receive in March.
And that’s why they work.
Why Busy People Are More Likely to Fall for These Scams
Falling for phishing isn’t about being careless.
It’s about being human.
When inboxes are overflowing and deadlines are tight, people stop reading carefully. Instead, they:
- Scan messages quickly
- Assume the request is legitimate
- Respond immediately to keep things moving
Cybercriminals design phishing emails specifically for this behavior.
They don’t need you to be reckless.
They just need you to rush.
And during tax season, almost everyone in finance, accounting, and operations is exactly that.
Four Simple Ways to Avoid Becoming the Easy Target
The good news is you don’t need expensive security tools or a dedicated cybersecurity team to reduce your risk during tax season.
Often, a few intentional habits can prevent most phishing incidents.
#1. Verify Payment Changes by Phone
If an email claims a vendor’s banking details have changed, never rely solely on the email.
Instead, call a phone number you already trust and confirm the change verbally.
This single habit can prevent some of the most expensive business email compromise scams.
#2. Slow Down Requests for Sensitive Information
Urgency should be a signal to pause, not to rush.
If someone requests W-2s, tax documents or financial records “right away,” take a moment to confirm the request before sending anything.
A legitimate sender won’t mind a short delay.
A scammer will.
#3. Confirm Immediate Requests Through a Second Channel
If an email claims something is urgent, verify it through another communication channel.
A quick phone call, text message, or internal chat can stop a scam before it turns into a costly mistake.
Real urgency can survive a two-minute verification.
Fake urgency cannot.
#4. Give Your Team a Five-Minute Heads-Up
Sometimes the most effective defense is simply awareness.
Take five minutes this week to remind your team that tax season phishing attacks on accountants increase dramatically in March and April.
Encourage employees to slow down, double-check unusual requests, and speak up if something seems wrong.
Giving people permission to pause could prevent a lot of unnecessary damage later.
The Takeaway
Tax season is stressful enough without adding “fell for a phishing scam” to the list.
Attacks this time of year aren't more complex than usual.
They’re simply better timed.
They rely on people being rushed.
They rely on assumptions.
They rely on everyone trying to power through the busiest month of the year.
Avoiding tax season phishing attacks on accountants doesn’t require completely overhauling your technology.
Sometimes the most effective protection is simply slowing down when something feels urgent and verifying requests before responding.
Often, that’s enough.
A Quick Busy-Season Sanity Check
Your organization may already have strong habits in place; if so, that’s great.
But if tax season tends to push your team into reactive mode — or you’re not sure how sensitive requests are handled when everyone is under pressure — it may be worth doing a quick sanity check.
Book your free 10-minute discovery call today to see if small process improvements can help you avoid major issues during busy seasons like tax time.
No sales pitch, just practical, actionable insight for your team.
Discover in minutes how a few new habits could prevent costly mistakes for your team this tax season. Protect your firm—act now.
If this doesn’t apply to your business, feel free to forward it to someone who might benefit.
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