What is the difference between reasonable cause and reasonable basis?

Asked by: Prof. Alphonso Berge DDS  |  Last update: May 19, 2026
Score: 4.8/5 (66 votes)

Reasonable cause is a high legal standard requiring, based on IRS guidelines, that a taxpayer exercised ordinary business care but was still unable to comply with the law. In contrast, a reasonable basis is a lower, though significant, tax reporting standard, defined as a position supported by at least one authority.

What is meant by reasonable cause?

Definition. A standard of proof that is applied to a set of facts or actions to prove whether a reasonable person would have come to the same conclusion or acted in the same way given the totality of the circumstances.

What is an example of a reasonable cause?

Common examples of reasonable cause include death or serious illness of the taxpayer or an immediate family member, natural disasters, and reliance on a tax professional.

What's the difference between reasonable cause and probable cause?

Duration of police encounter: Reasonable suspicion allows only as much time as necessary to confirm or dispel the suspicion. Probable cause justifies custody until arraignment. Intrusiveness permitted: Reasonable suspicion: brief stop and frisk for weapons or protective sweep.

Is reasonable cause a legal term?

Reasonable cause is a legal standard indicating a sufficient basis for a belief or action. It is often considered synonymous with or closely related to probable cause, requiring enough facts and circumstances to lead a reasonable person to believe that a crime has been committed or that evidence exists.

Reasonable Suspicion and Probable Cause A Primer

40 related questions found

What are the three levels of proof?

In California, there are three main standards of evidence used: preponderance of the evidence, clear and convincing evidence, and beyond a reasonable doubt. The preponderance of the evidence is the lowest standard of proof in a civil case.

What does the IRS consider a reasonable cause?

IRS Definition:

Reasonable cause is based on all the facts and circumstances in your situation. The IRS will consider any reason which establishes that you used all ordinary business care and prudence to meet your federal tax obligations but were nevertheless unable to do so.

Which lawyer wins most cases?

There's no single lawyer universally recognized as having won the most cases due to varying definitions, but Gerry Spence (never lost a criminal case, no civil loss since 1969) and Sir Lionel Luckhoo (245 successive murder acquittals) are legendary for exceptional win records, while figures like Clarence Darrow, Johnnie Cochran, and David Boies are famed for high-profile victories, showing success depends on the type of law and era.

What percentage of court cases never actually go to trial?

In fact, they almost never do. Only about 2% of federal criminal cases actually make it to trial. That means roughly 98 out of every 100 federal defendants never stand before a jury. Their cases end differently—sometimes better, sometimes through negotiated resolutions, and occasionally through outright dismissal.

What's the worst charge you can get?

The most severe criminal charge that anybody may face is first-degree murder. Although all murder charges are serious, first-degree murder carries the worst punishments. This is because it entails premeditation, which means the defendant is accused of pre-planning their victim's death.

What is the determination of reasonable cause?

Stated another way, reasonable cause exists when one can conclude based on all relevant evidence, viewed not as an advocate for either complainant or respondent but rather objectively in light of the Act's prohibitionary language and case law, that a violation may have occurred.

What is the reasonable cause standard?

Reasonable cause is determined on a case-by-case basis considering all the facts and circumstances of your situation. Reasons that qualify for relief due to reasonable cause depend on the type of penalty you owe and the laws in the Internal Revenue Code (IRC) for each penalty.

What is an acceptable reason for you to place a reasonable cause exception hold?

--We received notice that the check is being returned unpaid. --We have confidential information that indicates that the check may not be paid. --The check is drawn on an account with repeated overdrafts. --We are unable to verify the endorsement of a joint payee.

What situations would make someone fall under reasonable suspicion testing?

A reasonable suspicion test may only be conducted when a trained supervisor has observed specific, contemporaneous, articulable appearance, speech, body odor, or behavior indicators of alcohol use.

Is probable cause 51%?

Some courts and scholars have suggested probable cause could, in some circumstances, allow for a fact to be established as true to a standard of less than 51%, but as of August 2019, the United States Supreme Court has never ruled that the quantification of probable cause is anything less than 51%.

What is higher than reasonable suspicion?

Reasonable suspicion is a step before probable cause. At the point of reasonable suspicion, it appears that a crime may have been committed. The situation escalates to probable cause when it becomes obvious that a crime has most likely been committed.

What is the IRS 7 year rule?

The IRS 7-year rule primarily applies to keeping records for claiming a deduction for bad debts or losses from worthless securities, allowing a longer period to file for a credit or refund, but it's not a universal audit limit; it's often a recommended safe buffer for general record-keeping, with the standard IRS audit period usually being 3 years, extending to 6 years for substantial income omission (over 25%) or foreign income issues, and indefinitely for fraud.

How to write a reasonable cause letter to the IRS?

IRS Penalty Abatement Request Letter

  1. State the type of penalty you want removed.
  2. Include an explanation of the events and specific facts and circumstances of your situation, and explain how these events were outside of your control.
  3. Attach documents that will prove your case.

What is the $600 rule in the IRS?

The IRS $600 rule refers to a change in reporting requirements for third-party payment apps (like Venmo, PayPal) for taxable income from goods and services, where platforms must send a Form 1099-K if you receive over $600 in a year, intended to capture gig economy/side hustle income, though delays and phased implementation have adjusted the timeline, with current rules for 2024 using a higher threshold ($5,000) before fully phasing to $600 for future years, but remember all taxable income, regardless of form, must always be reported.
 

What's the highest burden of proof?

In criminal cases, the burden of proof lies with the prosecution and must meet the highest legal standard: “beyond a reasonable doubt.” This means the evidence presented must leave the jury or judge with a near certainty that the defendant committed the crime—there can be no reasonable doubt in their minds.

Can hearsay be considered as evidence?

California's "hearsay rule," defined under Evidence Code 1200, is a law that states that third-party hearsay cannot be used as evidence in a trial. This rule is based on the principle that hearsay is often unreliable and cannot be cross-examined.

Who decides if evidence is substantial?

Substantial evidence is a standard of review used by appellate courts when examining a lower court's decision. It asks whether there was enough reasonable and credible evidence presented to support the findings made by the court below, rather than re-evaluating the evidence itself.