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Form 3520: Stop $10,000 Continuation Penalties for U.S. Filers

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Yes, you can seek penalty relief for a late Form 3520 filing, but the outcome depends on the penalty type and how well you document reasonable cause. File the late form now, attach a signed reasonable-cause statement, and gather your supporting records immediately. Under IRC §§6677 and 6039F, the penalties can reach tens of thousands of dollars quickly, so every day of delay works against you.

TL;DR:

  • Penalties for late Form 3520 filings under IRC §§6677 and 6039F vary: trust transactions incur at least $10,000 or 35% of the reportable amount, while foreign gifts face monthly penalties of 5%, capped at 25%.
  • Filing late triggers additional penalties of $10,000 every 30 days after 90 days of notice unless a well-documented reasonable cause is attached at the time of filing.
  • The IRS now reviews reasonable-cause statements before assessing penalties, providing a chance to prevent penalties through proper documentation attached to the late submission.
  • Successful penalty abatement depends on specific, supported reasons like serious illness or reliance on a professional, not general ignorance of reporting obligations.
  • Filing the late Form 3520 with a signed, evidence-backed reasonable-cause statement maximizes the chance of penalty relief and avoids lengthy post-assessment disputes.
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Table of Contents

How Do Form 3520 Penalties Actually Work?

Form 3520 penalties come from two different statutes, and knowing which one applies to your situation changes both the math and your defense strategy. Parts I through III of the form, covering transactions with foreign trusts, fall under IRC §6677. Part IV, covering foreign gifts and bequests, falls under IRC §6039F. The IRS treats these differently at every stage, from calculation to the newer pre-assessment review process.

For foreign trust transactions, the initial penalty is generally the greater of $10,000 or 35% of the gross reportable amount involved in the transaction. The $10,000 floor matters most for smaller trust transactions, where a percentage calculation would produce a lower number than the flat minimum.

Foreign gifts under Part IV work on a different formula entirely:

  • The penalty is 5% of the gift or bequest amount for each month the filing is late.
  • The total caps at 25% of the gift’s value, no matter how many months pass beyond that point.
  • A $100,000 unreported gift from a foreign relative, for example, tops out at a $25,000 penalty even if the filing is years overdue.

Continuation penalties are where the real danger lives. Once the IRS issues Letter 3804 and 90 days pass without a response or correction, an additional $10,000 penalty can attach every 30 days. There is no cap on how many 30-day periods can accrue, though the practical ceiling is often the gross reportable amount itself. This is why tax professionals treat the 90-day window after any IRS notice as a hard deadline, not a suggestion.

On the statute of limitations, the clock generally does not start until you file a complete and accurate Form 3520. Once filed, the IRS has three years to assess §6677 or §6039F penalties tied to that return. An unfiled form leaves the assessment period open indefinitely, which is itself a strong argument for filing late rather than not filing at all.

Can You Get Form 3520 Penalty Abatement?

Reasonable cause is the primary path to Form 3520 penalty abatement, and it requires more than a good explanation. The IRS defines reasonable cause as exercising ordinary business care and prudence despite the failure to file. That standard demands a written statement, signed under penalty of perjury, backed by documents that corroborate your story rather than just assert it.

What tends to work in a reasonable-cause package:

  1. Serious illness or death in the immediate family during the filing period, supported by medical records or a death certificate.
  2. A surprise inheritance or gift the taxpayer had no advance knowledge of, paired with correspondence or estate documents showing the timeline.
  3. Documented reliance on a professional who was informed of the foreign transaction but failed to advise on the Form 3520 requirement, supported by engagement letters or email records.
  4. Natural disasters or events outside the taxpayer’s control that disrupted normal recordkeeping or filing capacity, with contemporaneous evidence.

What almost never succeeds: general ignorance of the filing requirement, assuming foreign privacy or banking secrecy laws excused disclosure, or a bare statement that says “I didn’t know” without corroborating facts. The IRS and Tax Court have both rejected reasonable-cause claims built on unsupported assertions, no matter how sincere they sound.

Administrative relief programs add another layer, though their reach is limited here. First Time Abate (FTA) has historically applied to certain penalties, but it has never reliably covered Form 3520 because FTA typically requires a clean three-year compliance history on the specific penalty type, and 3520 penalties are event-driven rather than recurring. The IRS’s Automatic Exemption from Penalty program, rolling out for certain information returns, carries similar limitations for one-time triggered filings like Form 3520.

For the mechanics of building this case, our guide on reasonable cause for IRS penalties walks through documentation standards in more depth.

Pro Tip: File your reasonable-cause statement WITH the late Form 3520, not after. A statement attached at filing gets reviewed before assessment under current IRS procedure; one submitted after assessment often forces you into a formal abatement request or appeal instead.

If your penalty has already posted and reasonable cause alone did not resolve it, Form 843 becomes the vehicle for a formal abatement request, discussed further below.

What Changed With IRS Form 3520 Penalties in 2026?

The IRS made a significant procedural shift that directly benefits late filers. In October 2024, the agency ended automatic assessment of penalties for late-filed Form 3520 Part IV foreign gift reporting. Before this change, the system computer-generated penalty notices the moment a late Part IV filing hit the system, with no human review of any attached explanation.

Illustrated pre-assessment penalty review process

The IRS also agreed to review reasonable-cause statements attached to late Forms 3520 and 3520-A covering Parts I through III before assessing §6677 penalties on foreign trust transactions. This is a meaningful departure from the old assess-first, argue-later model.

Why this matters for you:

  • A well-documented reasonable-cause statement filed with your late return can now prevent the penalty from posting in the first place.
  • You avoid the multi-month cycle of receiving a notice, filing an abatement request, and waiting for a response.
  • It reduces, though does not eliminate, the need to escalate to IRS Appeals after the fact.

The National Taxpayer Advocate had pushed for this change for years, citing data showing that a substantial share of assessed Form 3520 penalties were later abated on reconsideration. That pattern, penalties assessed automatically and then reversed after review, suggested the automatic-assessment model was generating unnecessary work for both taxpayers and the IRS. The policy update responds directly to that finding, moving the human review earlier in the process instead of leaving it for the back end.

How Do You File a Late Form 3520 and Write a Reasonable-Cause Statement?

Getting this right the first time saves you months of correspondence. Here is the sequence that gives you the best shot at avoiding an assessed penalty entirely.

  1. Complete the relevant parts of Form 3520. Fill in Parts I through III for foreign trust transactions or Part IV for foreign gifts and bequests, whichever applies to your situation.
  2. Attach a substitute Form 3520-A if the foreign trust did not file one. The Form 3520 instructions allow a substitute filing when the trust itself is unresponsive or noncompliant, which can reduce your exposure under §6677.
  3. Calculate or clearly explain the reportable amount. If exact figures are unavailable, show your calculation method and the records you relied on.
  4. Draft the reasonable-cause statement as a chronology. Lay out dates, events, and actions taken in plain order, not as a general narrative. The IRS reviewer needs to see cause and effect, not just a summary of hardship.
  5. Attach supporting documents as labeled exhibits. Medical records, death certificates, estate paperwork, or advisor correspondence should each be referenced by name in the statement itself.
  6. Sign the declaration under penalty of perjury. An unsigned statement, or one missing this specific language, is treated as incomplete and may not get the pre-assessment review at all.
  7. Mark the filing clearly to flag attached documentation. Practitioners recommend a cover sheet or index of exhibits so submission processing routes the case correctly instead of triggering an automatic notice.

Pro Tip: If you’re mailing a paper return, send it by a method that gives you delivery confirmation and keep a copy of everything, including the envelope contents list. If the IRS later claims your statement wasn’t attached, that transmittal record is your proof it was.

If a penalty has already been assessed and you’re past the point of attaching a statement to the original return, Form 843 is the correct tool. It functions as a formal claim for refund or abatement after the fact, rather than a preventive attachment, and it requires you to state the specific grounds and cite the reasonable-cause facts directly on the form.

What Happens After the IRS Assesses a Form 3520 Penalty?

If reasonable cause wasn’t attached in time, or the IRS disagreed with it, the assessment process moves through specific administrative steps. Knowing what each document means helps you respond correctly instead of missing a deadline.

  • The IRS typically issues Letter 3804 as the opening notice, and this letter starts the 90-day clock before continuation penalties can begin accruing.
  • Form 8278 is the internal document IRS examiners use to compute and assert the penalty, often paired with a Form 886-A explanation of the facts and law behind the assessment.
  • Once assessed, you can request abatement administratively by responding to the notice with new or expanded documentation, rather than filing Form 843 immediately.
  • If the administrative request is denied, you have the right to an Appeals conference, where an Appeals officer independently reviews the reasonable-cause evidence outside the original examiner’s chain.
  • You can pay the penalty and pursue a refund claim instead of contesting it upfront, though this ties up cash while the dispute proceeds.
  • If you’ve received a 30-day letter type notice, that timeline is real. Missing it can forfeit your Appeals rights on that specific assessment.

Bringing in representation at this stage matters because the IRS requires a signed power of attorney (Form 2848) before any third party can discuss your case, request transcripts, or negotiate on your behalf. Attempting to navigate an Appeals conference without someone who has handled these specific penalty types before often means missing arguments that a reviewer would actually credit.

What Do Successful and Failed Form 3520 Cases Look Like?

Outcomes on Form 3520 penalty relief split sharply based on documentation quality, not just the strength of the underlying excuse.

  • Accidental inheritance, strong documentation: A taxpayer received an unexpected inheritance from a foreign relative and filed late upon learning of the requirement. Death certificate, probate records, and a clear timeline supported abatement.
  • Late trust distribution report, no evidence: A taxpayer reported a foreign trust distribution late and claimed general unfamiliarity with the rules. Without documentation tying the delay to a specific cause, the penalty was sustained.
  • Substitute 3520-A attached: A taxpayer whose foreign trust trustee refused to cooperate filed a substitute 3520-A along with a detailed explanation, which reduced the penalty exposure compared to filing nothing.

Common mistakes that sink otherwise reasonable claims:

  • Writing a vague statement (“I was busy” or “I didn’t understand”) instead of a dated chronology.
  • Failing to attach any corroborating document at all, even when one exists.
  • Waiting weeks or months to respond after receiving Letter 3804, letting continuation penalties accrue unnecessarily.

A Practitioner’s View on Form 3520 Penalty Relief

Speed and documentation win these cases more often than the underlying excuse does. In over 45 years handling IRS matters, the pattern holds: taxpayers who file the late Form 3520 immediately, with a specific, evidence-backed reasonable-cause statement attached, get better outcomes than those who wait for a notice and scramble afterward.

Representation earns its cost when a case reaches Appeals or when the reasonable-cause narrative needs restructuring to match what an examiner is actually trained to credit. A CPA who has drafted these statements before knows which facts an IRS reviewer weighs and which ones read as filler. If your exposure runs into five or six figures, professional review before you file is cheaper than fighting an assessment after the fact.

— Joe

How Taxproblem Handles Form 3520 Penalty Cases

You can get direct access to a CPA with extensive IRS representation experience instead of a call center that hands your file to whoever picks it up next. When a Form 3520 penalty is on the table, that difference shows up in how the reasonable-cause statement gets written and how an Appeals conference gets handled.

Taxproblem

Delinquent Form 3520 and 3520-A filings can be prepared, reasonable-cause statements drafted around the specific facts of your case, and direct representation provided if the IRS assesses a penalty and the matter moves to Appeals. For taxpayers whose overall tax situation includes other outstanding liabilities, an Offer in Compromise may also be worth exploring alongside the penalty issue.

When you reach out, you can expect a request for foreign trust or gift documentation, a review of penalty exposure under §§6677 or 6039F, and a discussion about possible engagement terms. Consider starting with a consultation to understand your case status and options. The full range of tax resolution services can be reviewed before deciding how to proceed.

Where to Verify These Rules Yourself

The Form 3520 instructions lay out every penalty formula cited above. IRM 20.1.9 and the IRS penalty handbook govern how examiners apply these rules internally, and the National Taxpayer Advocate’s reporting documents the abatement data behind the 2024 policy shift.

This article is general information, not a substitute for advice from a qualified financial advisor. Consult a qualified financial professional about your own circumstances before acting on anything here.

Sources

FAQ

Is There a Penalty for Filing Form 3520 Late?

Yes. Late foreign trust reporting under §6677 triggers a penalty of the greater of $10,000 or 35% of the reportable amount, while late foreign gift reporting under §6039F runs 5% per month up to a 25% cap. Continuation penalties of $10,000 every 30 days can apply starting 90 days after an IRS notice.

Can IRS Penalties Be Waived?

Yes, through a documented reasonable-cause showing that you exercised ordinary business care and prudence despite the late filing. The IRS also reviews attached reasonable-cause statements before assessing certain Form 3520 penalties under its updated 2024 procedures, which can prevent the penalty from posting at all.

Who Is Required to File Form 3520 With the IRS?

U.S. persons who receive gifts or bequests from foreign persons above the reporting threshold, or who engage in certain transactions with foreign trusts, must file Form 3520. This includes receiving distributions from a foreign trust or transferring assets into one.

What Is a Good Reason for a Penalty Waiver?

Serious illness or death in the family, an unexpected inheritance the taxpayer had no advance knowledge of, or documented reliance on a professional advisor who failed to flag the filing requirement all tend to support reasonable cause when backed by records. General unfamiliarity with the rules or citing foreign privacy laws generally does not succeed.

Does Taxproblem Handle Form 3520 Penalty Abatement Requests?

Yes. Taxproblem prepares delinquent Form 3520 and 3520-A filings, drafts reasonable-cause statements, and represents clients through IRS Appeals when a penalty has already been assessed. Current fees are available through a consultation.

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