Forensic Accounting: What CPAs Need to Know Before Taking Their First Investigation

Forensic accounting sits at the intersection of accounting, investigation, and litigation. Unlike traditional accounting work, the goal isn’t simply to determine whether the numbers balance. A forensic accountant may be asked to uncover hidden assets, trace funds, investigate suspected fraud, calculate financial losses, or explain complicated financial evidence to attorneys, judges, and juries.

For CPAs interested in expanding into forensic accounting, the first investigation can feel very different from ordinary tax or accounting engagements.

The good news is that many of the skills you already use as a CPA provide a strong foundation. The difference is learning how to approach financial information with an investigator’s mindset.

What Is Forensic Accounting?

Forensic accounting uses accounting and investigative techniques to examine financial information and answer questions that may have legal or investigative consequences.

A forensic accountant might be involved in cases involving:

• Employee embezzlement
• Business fraud
• Hidden income
• Hidden assets
• Partnership disputes
• Divorce proceedings
• Tax investigations
• Money laundering
• Financial damages
• Litigation support

The work often requires more than identifying an unusual transaction. The investigator must determine what happened, gather supporting evidence, document the methodology, and communicate the findings clearly.

That distinction is important.

A forensic accountant isn’t simply looking for numbers that don’t make sense. They’re building a financial story that can withstand scrutiny.

Start With the Question, Not the Spreadsheet

One of the biggest mistakes a new forensic accountant can make is immediately opening spreadsheets and searching for suspicious transactions.

Before analyzing the numbers, understand the question you’re being asked to answer.

For example:

• Was money diverted from the company?
• How much income is being hidden?
• What assets may have been transferred?
• How much financial damage resulted from the alleged conduct?
• Can a particular transaction be connected to another person or entity?

The investigative question determines what evidence you need and how you should analyze it.

A clear engagement objective also helps prevent an investigation from becoming unnecessarily broad and expensive.

Follow the Money

Financial investigations frequently require tracing transactions across multiple accounts, entities, individuals, and sources of documentation.

Bank statements may reveal transfers that aren’t obvious from a company’s general ledger. Tax returns can provide another layer of information. Credit card records, invoices, payroll records, electronic communications, and other documents may help establish the context surrounding a transaction.

The objective isn’t simply to collect documents.

It’s to connect the dots.

A useful investigative process asks:

Where did the money come from?

Where did it go?

Who controlled it?

When did the transaction occur?

What documentation supports the transaction?

Does the financial activity make economic sense?

Those questions can turn a collection of financial records into an investigative trail.

Evidence Preservation Matters

When fraud or embezzlement is suspected, evidence can disappear quickly.

Documents may be deleted. Emails may be lost. Employees may change records. Electronic files may be overwritten or altered.

That is why evidence preservation should be considered early in an investigation.

For example, an investigation involving employee embezzlement may require examination of both paper and electronic records. Understanding what information exists, where it is stored, and how it should be preserved can be just as important as the financial analysis itself.

Forensic accounting isn’t just about finding information.

It’s also about preserving the information needed to support your conclusions.

Your Analysis Must Be Explainable

A forensic accountant may eventually need to explain their methodology to someone who isn’t an accountant.

That could be an attorney, client, judge, jury, opposing expert, or investigator.

A complicated spreadsheet isn’t enough.

Your analysis should allow another professional to understand:

1. What information you examined.
2. What methodology you used.
3. Why you selected that methodology.
4. What assumptions you made.
5. How you reached your conclusion.
6. What evidence supports the conclusion.

This is especially important when the work may become part of litigation.

ForensicsCPE’s course library includes training specifically focused on court-approved methods of proof and writing expert reports that can withstand scrutiny in litigation.

The Report Is Part of the Investigation

Finding the answer is only one part of the job.

You also need to communicate the answer.

A strong forensic report should make the financial analysis understandable without forcing the reader to decode pages of spreadsheets.

The report should clearly explain the issue being investigated, the methodology, relevant evidence, calculations, assumptions, and conclusions.

Think of the report as the bridge between your technical analysis and the people who need to make decisions based on it.

What About Divorce Investigations?

Divorce cases are another area where forensic accounting skills can be valuable.

When financial information is incomplete or disputed, a forensic accountant may be asked to investigate income, assets, business interests, or other financial information.

The investigation can involve reviewing tax returns, financial statements, bank records, business records, and other documentation to identify inconsistencies or potentially hidden financial information.

ForensicsCPE includes a dedicated course on investigating divorce cases, covering the investigative process from engagement through courtroom testimony.

You Don’t Need to Become an Investigator Overnight

CPAs already possess many of the fundamentals needed for forensic accounting: accounting knowledge, financial statement analysis, tax knowledge, documentation skills, and attention to detail.

The next step is learning how to apply those skills in an investigative environment.

That means learning how to:

• Approach financial information as evidence
• Identify investigative questions
• Trace transactions
• Recognize potential fraud indicators
• Preserve relevant evidence
• Calculate financial losses
• Document your methodology
• Prepare professional reports
• Communicate findings effectively

These are practical skills that can be developed through focused training and real-world case examples.

Build Your Investigative Skill Set

Forensic accounting is ultimately about turning financial information into defensible conclusions.

If you’re a CPA considering adding forensic accounting to your practice, developing investigative skills can open the door to work involving fraud, litigation, divorce, tax investigations, and financial disputes.

ForensicsCPE offers self-study courses covering forensic accounting, fraud, criminal tax, IRS enforcement, and tax controversy. The library currently includes 17 courses and 54 CPE credit hours, with courses built around Robert Nordlander’s experience as a former IRS Criminal Investigation Special Agent and forensic accounting practitioner.

Ready to develop practical forensic accounting skills?

Explore the ForensicsCPE course library and find a self-paced course that fits your professional goals.