Defending Against IRS Fraud Allegations

Most tax examinations are disputes about substantiation. A small number are about whether the taxpayer intended to deceive the government — and those follow different rules, carry different consequences, and require a different posture from the first day.

The distinction matters enormously. A civil adjustment produces additional tax and perhaps a 20% accuracy penalty. A fraud finding produces a 75% civil fraud penalty under IRC 6663, an assessment period that never expires, and the possibility of criminal prosecution.

If you are reading this because an examination has taken a turn, the single most useful thing to know is that what you say next matters more than what happened before. We handle these matters in Temecula, Murrieta, San Diego, Riverside, and San Bernardino.

What the Government Must Prove

Fraud requires an intentional wrongdoing to evade tax believed to be owing. Negligence, carelessness, aggressive positions, and honest mistakes are not fraud, however large the resulting adjustment.

For the civil fraud penalty, the burden is on the government and the standard is clear and convincing evidence — higher than the ordinary preponderance standard applied elsewhere in tax litigation. For criminal charges, the standard is proof beyond a reasonable doubt.

Because intent is rarely provable directly, the government relies on circumstantial indicators — the “badges of fraud”:

• Understated income, particularly a consistent pattern across multiple years
• Inadequate or destroyed records, or two sets of books
• Concealment of assets, nominee accounts, or unexplained cash transactions
• False statements to investigators
• Dealing in cash to avoid a paper trail, or structuring deposits
• Failure to cooperate with an examination
• Implausible or inconsistent explanations
• Lifestyle materially inconsistent with reported income

No single badge establishes fraud. A pattern of several does the work, which is why the defense usually turns on providing an innocent explanation for each indicator rather than contesting the tax computation.

The Statutes

• IRC 7201 — tax evasion. A felony, up to five years and substantial fines. Requires an affirmative act of evasion beyond simply not paying.
• IRC 7206(1) — false return. A felony, up to three years. Signing a return under penalties of perjury known to be materially false. This is charged frequently because it does not require proving a tax deficiency.
• IRC 7203 — failure to file. A misdemeanor, up to one year per year charged.
• IRC 7212 — obstruction. Interfering with the administration of the internal revenue laws.
• IRC 6663 — civil fraud penalty. 75% of the underpayment attributable to fraud.
• IRC 6501(c)(1) — where a return is fraudulent, the assessment period never expires.

The criminal statute of limitations is generally six years for the principal tax offenses. The civil one, for a fraudulent return, does not exist.

Eggshell and Reverse Eggshell Audits

An eggshell audit is a civil examination in which the taxpayer knows there is a problem the agent has not yet found. It is civil in form and dangerous in substance, because everything produced and said may end up in a criminal file.

A reverse eggshell audit is worse: a civil examination being conducted while a criminal investigation is already underway, sometimes with information flowing to Criminal Investigation. The taxpayer believes they are resolving an ordinary audit.

The government is not required to announce a referral. What can indicate one:

• The agent stops requesting documents, or the examination goes quiet without explanation
• Summonses served on banks, customers, or third parties
• Interest in earlier years or in intent rather than substantiation
• Requests to interview employees or the return preparer
• The appearance of a second agent, or of a special agent — special agents are Criminal Investigation, and their involvement means the matter is already criminal

If special agents make contact — often unannounced, at a home or business, in pairs — the correct response is to decline to answer questions, take their cards, and call counsel. That is not obstruction. It is the exercise of a constitutional right, and it is the single most consequential decision in these cases.

Why the Accountant Is the Wrong Person Here

This is the point on which these cases are most often lost before they begin.

The Section 7525 practitioner privilege covering communications with CPAs and enrolled agents does not apply in criminal matters. A taxpayer who explains the problem candidly to their accountant has created a witness with documents.

Attorney-client privilege applies in both civil and criminal matters. Where accounting analysis is genuinely needed, the accepted structure is a Kovel arrangement, in which the attorney engages the accountant so the work supports legal advice and falls within the attorney’s privilege. It must be established before the work begins and cannot be applied retroactively to an existing relationship.

There is also a conflict problem. Where the preparer of the return is defending it, an adjustment may implicate their own conduct — and in a fraud case the preparer can become a target or a cooperating witness. See IRS representation.

Voluntary Disclosure

A taxpayer who comes forward before the government begins an investigation may qualify for the IRS Voluntary Disclosure Practice. It does not guarantee immunity, but a timely, truthful, complete disclosure accompanied by cooperation and full payment arrangements is generally considered in deciding whether to recommend prosecution, and in practice most participants are not prosecuted.

The eligibility requirement is strict: the disclosure must be genuinely voluntary. Once an examination has begun, once the IRS has received information from a third party, or once a criminal investigation is underway, the window is closed.

Two things to avoid. A quiet disclosure — simply filing amended returns hoping no one notices — provides none of the protection and can itself be treated as an affirmative act. And for offshore matters specifically, the streamlined procedures require certifying non-willfulness under penalties of perjury; using them where conduct was willful converts the problem into a new false statement.

Defending a Civil Fraud Penalty

Where the matter stays civil, the defense usually rests on defeating intent rather than the numbers.

Effective themes include reliance on a professional where complete information was provided; genuine complexity or ambiguity in the law; poor recordkeeping that reflects disorganization rather than concealment; health problems, addiction, or personal crisis during the years at issue; and consistent cooperation throughout the examination.

Because the government carries the burden by clear and convincing evidence, a well-documented alternative explanation for each badge frequently reduces a fraud case to an ordinary accuracy penalty at 20% — a difference of 55 percentage points on the underpayment.

Where a return was fraudulent, note that the open-ended assessment period applies to that year permanently, so resolving the exposure does not become easier with time. See IRS audits and unfiled returns.

The Preparer’s Position

Where a return is alleged to be fraudulent, the person who prepared it has a problem of their own — and the taxpayer needs to understand that early, because it shapes whose interests are being served.

Return preparers face their own penalty regime: understatement penalties under IRC 6694, aiding and abetting penalties under 6701, and in serious cases criminal exposure under 7206(2) for aiding in the preparation of a false return. A preparer facing that risk has an incentive to establish that the client withheld information from them.

That incentive is not necessarily dishonest, and most preparers are not in this position. But it means the preparer’s account of what they were told becomes a live issue, and the taxpayer who assumes their long-time accountant is simply on their side may be surprised.

Conversely, reliance on a professional is one of the strongest defenses available to a taxpayer — but it requires showing that complete and accurate information was provided, that the adviser was competent in the relevant area, and that the advice was actually relied on in good faith. That showing depends on records of what was given to the preparer and when, which is another reason engagement files and document transmittals matter more in these cases than in ordinary examinations.

Frequently Asked Questions

How do I know if my audit has become criminal?

You often will not be told. Warning signs include an agent who stops requesting documents, third-party summonses, interest in intent rather than substantiation, and the appearance of a special agent — which means the matter is already criminal.

Should I talk to a special agent?

No. Decline politely, take their card, and contact counsel. Declining is a constitutional right, not obstruction, and statements made in these interviews are frequently the strongest evidence in the case.

Is failing to file a crime?

Willful failure to file is a misdemeanor under IRC 7203. Prosecutions for simple non-filing are uncommon and generally reserved for aggravated cases, but filing a false return to fix the problem creates a felony exposure that did not previously exist.

Can my accountant be forced to testify?

In a criminal matter, generally yes. The practitioner privilege does not extend to criminal proceedings. Attorney-client privilege does.

Is it too late to come forward?

Voluntary disclosure requires that you act before an examination or investigation begins and before the IRS receives the information from another source. If nothing has started, the window may still be open.

What is the difference between the 20% and 75% penalties?

The accuracy-related penalty at 20% applies to negligence or substantial understatement. The civil fraud penalty at 75% requires the government to prove intentional evasion by clear and convincing evidence.

How far back can they go?

For a fraudulent return, the civil assessment period never expires. The criminal statute of limitations is generally six years for the principal tax offenses.

Say Less, and Call Counsel First

These matters are decided by a record that is largely created after the taxpayer becomes aware there is a problem — in interviews, in documents produced, and in attempts to fix things that instead create new offenses. Nothing about the underlying years changes. What can still change is everything that happens next.

Pietro Canestrelli holds an LL.M. in Taxation and represents taxpayers in eggshell examinations, civil fraud penalty disputes, voluntary disclosures, and matters involving Criminal Investigation. Schedule a consultation, or review our IRS representation and business tax audit pages.