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Reasonable Cause

Katelynn Minott, CPA & CEO profile picture

Reasonable cause is a penalty relief standard that can apply when a taxpayer tried to comply with U.S. tax rules but could not meet a filing, payment, or reporting requirement because of specific facts beyond their control. For U.S. expats, it can matter after late tax returns, missed payments, delinquent FBARs, late Form 8938, missed foreign trust forms, or other international information return penalties.

Why it matters for U.S. expats

Reasonable cause can help U.S. expats ask the IRS to remove or reduce certain penalties, but it has to be supported by facts. Living abroad, misunderstanding the rules, relying on a preparer, or missing a deadline may explain what happened, but the request still needs to show what prevented compliance, when the issue was discovered, how quickly it was corrected, and what steps the taxpayer took to meet U.S. filing obligations.

Common questions

1. What does reasonable cause mean?

Reasonable cause means the taxpayer had a valid, fact-based reason for missing a tax obligation despite trying to comply with the law.

2. Is reasonable cause the same as penalty abatement?

No. Penalty abatement is the removal or reduction of a penalty. Reasonable cause is one possible basis for asking the IRS to abate the penalty.

3. What does the IRS look at for reasonable cause?

The IRS looks at the full facts and circumstances, including what happened, when it happened, how it prevented compliance, what the taxpayer did to comply, and how quickly the taxpayer corrected the issue.

4. What reasons can support reasonable cause?

Possible reasons include serious illness, death or serious illness in the immediate family, natural disaster, civil disturbance, inability to obtain records, system issues, or another event that directly prevented timely filing, payment, or reporting.

5. Is not knowing about U.S. expat tax rules enough for reasonable cause?

Not by itself. Lack of knowledge can be part of the explanation, but the taxpayer should also show what they did to understand the rules, seek help, correct the issue, and stay compliant afterward.

6. Can relying on a tax preparer support reasonable cause?

It can, but relying on a preparer does not automatically qualify. The taxpayer should be able to show that they gave the preparer complete information, chose someone competent for the issue, reviewed what was filed, and acted promptly when the problem was found.

7. Can reasonable cause apply to failure-to-file penalties?

Yes. Reasonable cause can apply when the taxpayer exercised ordinary care and prudence but could not file the return on time.

8. Can reasonable cause apply to failure-to-pay penalties?

Yes. Reasonable cause can apply when the taxpayer exercised ordinary care and prudence but could not pay on time. Lack of funds alone is not enough, but the facts behind the lack of funds may matter.

9. Does reasonable cause apply to estimated tax penalties?

Reasonable cause does not apply to some penalties, including certain estimated tax penalties. Those penalties have their own relief rules and waiver standards.

10. Can reasonable cause apply to FBAR penalties?

Yes, reasonable cause can be relevant to FBAR penalty relief. The taxpayer should also review whether Delinquent FBAR Submission Procedures, Streamlined Filing Compliance Procedures, or another offshore compliance route is more appropriate.

11. Can reasonable cause apply to international information return penalties?

Yes. Reasonable cause can be used for some late or missing international information returns, including Forms 3520, 3520-A, 5471, 5472, 8938, and 8865, but each form and penalty has its own rules.

12. What should a reasonable cause statement include?

A reasonable cause statement should explain what was missed, why it was missed, the dates involved, how the facts prevented compliance, when the taxpayer learned of the problem, what they did to correct it, and what documents support the explanation.

13. When should reasonable cause be submitted?

It depends on the penalty and procedure. Some requests are made after an IRS notice, some are attached to delinquent forms, and some are submitted with amended returns or Form 843.

14. Does the IRS have to accept a reasonable cause statement?

No. The IRS can deny reasonable cause relief if the explanation is incomplete, unsupported, inconsistent, or does not meet the standard for that penalty.

15. What records help support reasonable cause?

Helpful records include medical records, travel records, correspondence with tax preparers, IRS notices, foreign tax filings, bank statements, account-opening documents, proof of residence abroad, disaster records, system outage records, and evidence showing when the taxpayer learned of the filing requirement.

When to get help

Professional guidance is important when:

  • You received an IRS penalty notice.
  • You missed a U.S. tax return, payment deadline, FBAR, or international information return.
  • You need to decide whether reasonable cause, first-time abatement, streamlined filing, delinquent FBAR filing, or voluntary disclosure is the right route.
  • You need to explain non-willful conduct or missed offshore reporting.
  • You have penalties for Form 3520, Form 3520-A, Form 5471, Form 5472, Form 8938, Form 8621, or Form 8865.
  • You relied on a tax preparer and need to show what information was provided.
  • The IRS denied an earlier penalty relief request.

Bright!Tax can review the facts, identify the right penalty relief route, and prepare a reasonable cause statement with the amended returns, FBARs, or international forms needed to correct the issue. Get started with Bright!Tax.

Official sources

Reviewed by

Katelynn Minott, CPA & CEO

Last reviewed

July 2026

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