On the surface, everything can look calm.
That is what makes Shark Week interesting every year. The danger is not always what you see on top of the water. It is what is already moving underneath.
Cybercriminals work the same way.
For accounting firms, CPA practices, tax professionals, bookkeepers, payroll providers, and financial service organizations, the threats are built to blend in. They look like normal client emails, routine invoices, payroll updates, Microsoft 365 alerts, bookkeeping system notifications, or quick requests from someone your team already trusts.
Then money moves. Client financial data gets exposed. Payroll records are abused. Systems lock up. Access gets misused. And by the time the problem is obvious, the damage may already be done.
Busy seasons make this worse.
Tax season is the obvious one. Everyone is moving fast. Clients are sending documents. Staff are juggling deadlines. Extensions, quarterly filings, payroll schedules, financial statements, and advisory work all stack up.
But summer can create its own problems too.
People are traveling. Schedules are lighter. Key employees are out. Approvals get handed off. Attention gets split. Attackers know this, and they use it.
That matters for firms in Columbia, Boone County, and the surrounding Mid-Missouri region. Local accounting and financial service teams support healthcare organizations, professional services firms, nonprofits, local governments, construction companies, manufacturers, agricultural businesses, startups, small businesses, and family-owned companies. Columbia’s economy also has a strong mix of healthcare, research, students, startups, and a highly educated workforce connected to the broader influence of Mizzou. That creates opportunity, but it also creates a lot of sensitive data moving between people, platforms, and organizations.
Here are three risks circling accounting and financial service organizations right now.
1. Fake invoices, client impersonation, and vendor payment changes
Attackers do not always need to hack your network.
Sometimes they only need to send one email that looks believable.
This is called business email compromise, or BEC. It happens when a criminal pretends to be a client, vendor, executive, nonprofit director, contractor, payroll contact, or partner your team already knows.
The email looks normal. The wording feels familiar. The request seems routine.
A client asks for updated banking details. A vendor sends a revised invoice. A business owner asks for a wire transfer. A payroll contact requests a direct deposit change. A construction company sends new payment instructions. A nonprofit says a grant reimbursement needs to be processed quickly.
Someone acts on it. The invoice is paid. The bank information is changed. The transfer is approved. Later, the real client or vendor calls, and your team finds out the money went to the wrong place.
These attacks increase when normal approval processes get loose. During tax season, the issue is speed and volume. During vacation season, the issue is coverage and handoffs. The person who usually handles payments may be out. A backup may not know what normal looks like. An urgent message may get treated as a task to complete instead of a risk to verify.
The fix is simple.
Create a verification process for any financial request that comes through email. If vendor payment details change, if wire information is sent, if payroll direct deposit changes, or if an invoice feels unusual, your team should confirm it using a known phone number. Not the phone number in the email.
A two-minute call can stop a very expensive mistake.
2. Phishing attacks aimed at distracted accounting teams
Phishing works because people are busy.
That is the whole strategy.
A staff accountant sees a Microsoft 365 password reset email and clicks the link. A bookkeeper gets a text that looks like it came from IT. A payroll specialist receives an urgent direct deposit request right before processing payroll. A tax preparer opens a file because the message appears to come from a familiar client in Ashland, Hallsville, Fulton, Boonville, Mexico, Moberly, Jefferson City, or California.
The attacker is counting on speed.
They want your people to react before they think.
Software matters. Microsoft 365 security settings, multifactor authentication, endpoint protection, spam filtering, and good monitoring all matter. But the best protection is not only a tool. It is a culture where employees know they are allowed to slow down when something feels off.
Your team should pause when they see:
- An unexpected login request
- A payment instruction that came out of nowhere
- A link they were not expecting
- A file attachment that does not match the conversation
- A message that creates pressure or urgency
- A request to bypass normal process
- A client request involving payroll records, tax documents, or financial statements that feels unusual
This is especially important for firms that handle client financial data every day. Tax returns, W-2s, 1099s, payroll reports, bank statements, general ledgers, audit workpapers, and bookkeeping records are valuable to criminals. They are also valuable to your clients, and clients expect you to protect them.
Speed is a weapon attackers use against your firm.
Slowing down takes that weapon away.
3. Vendor, app, and third-party access that is not being watched
Your firm may be secure, but what about the vendors and platforms connected to it?
If a vendor has access to your systems, client data, email, cloud tools, payroll platform, bookkeeping system, document portal, tax software, or Microsoft 365 environment, their problem can become your problem fast.
This is supply chain risk.
Most organizations have more of it than they realize.
Think about all the software tools your firm uses. Tax preparation software. Client portals. Payroll platforms. Time and billing systems. Practice management tools. QuickBooks Online, Xero, or other bookkeeping systems. Document management platforms. E-signature tools. Outside consultants. Temporary seasonal staff. Contractors who helped during a project. Old users that were never removed.
Each one can become a path into your firm if it is not managed.
Outsourcing a service does not outsource responsibility.
You need to know the basics:
- Which vendors and apps can access your client data or internal systems?
- What exactly are they connected to?
- Who inside your firm owns that relationship?
- When was their access last reviewed?
- What happens if that tool goes down during tax season or payroll processing?
If those answers are not clear, your risk is not clear either.
And unclear risk is where problems start.
Backups and recovery matter more than most firms think
Cybersecurity is not only about keeping attackers out.
It is also about making sure your firm can keep working when something goes wrong.
If ransomware locks a workstation, if a bookkeeping system becomes unavailable, if Microsoft 365 access is disrupted, if a server fails, or if a key file share disappears, what happens next?
That is where backup and disaster recovery become business continuity issues.
For an accounting firm, downtime is not just inconvenient. It can delay payroll, tax filings, financial statements, month-end close work, audit deadlines, nonprofit reporting, local government reporting, construction draws, manufacturer costing, and small business advisory work.
Good recovery planning helps your team protect client service, employee efficiency, and firm reputation. It also keeps a technical problem from becoming a business crisis.
By the time you see the threat, it may already be moving
Sharks do not announce themselves.
Neither do the cybercriminals targeting accounting and financial service organizations in Columbia and Mid-Missouri.
The firms that get hit are not always ignoring obvious warning signs. Many believe everything is fine because nothing looks wrong on the surface.
That is the trap.
Invoices look normal. Client emails look routine. Vendor access looks harmless. Employees are just trying to get work done. Tax season feels urgent. Summer schedules feel relaxed.
Meanwhile, attackers are looking for the gap.
At Tigerhawk, we help business owners and professional teams get a clear picture of where they are exposed across people, vendors, email, devices, Microsoft 365, backup, recovery, and daily operations. Not with scare tactics. With practical steps that make sense for real businesses and busy firms.
If you are not sure where your firm stands, now is a good time to find out.
For more information, schedule time with Tigerhawk.
Questions Columbia Accounting Teams Often Ask
How can a Columbia CPA firm reduce cyber risk before tax season?
Start with the areas that create the most exposure during deadline pressure: Microsoft 365 security, multifactor authentication, phishing training, vendor payment verification, client portal access, and backup testing. Tax season adds speed and volume, so your controls need to be simple enough for staff to follow when workloads are high and client requests are constant.
What client financial data should accounting firms in Boone County protect most carefully?
Protect anything that could be used for fraud, identity theft, payroll diversion, or unauthorized financial access. That includes tax returns, W-2s, 1099s, payroll records, bank statements, financial statements, general ledgers, owner information, and nonprofit or local government reporting documents. The risk is not only data loss. It is the misuse of trusted information.
Do bookkeepers and payroll providers in Mid-Missouri need backup and disaster recovery?
Yes. Bookkeeping and payroll work depends on timely access to systems, files, and cloud platforms. If ransomware, an outage, accidental deletion, or a failed device interrupts service, clients may miss payroll, reporting, or cash flow deadlines. Backup and disaster recovery help protect business continuity for firms serving Columbia, Fulton, Boonville, Jefferson City, and nearby communities.