Inherited Foreign Account Never Reported: SDOP

If you live in the US and inherited a foreign bank account you never reported, the Streamlined Domestic Offshore Procedure (SDOP) is usually the route, provided the failure was non-willful and you filed US returns for the lookback years. Inheriting the money is generally not taxable; the unreported interest, FBARs and Form 3520 are what need fixing.

This is one of the most common ways people living in the United States end up with an offshore compliance problem without ever opening an offshore account. A parent dies in India, Korea, the UK or Brazil. A savings account, a fixed deposit, a small brokerage account or a pension pot passes to you. Nobody in the family thinks of it as "a foreign account" — it is just your mother's bank. Years later a tax preparer, a bank compliance letter or a property sale makes you realise the IRS expected to hear about it. This guide sets out what was actually owed, what was not, and how the streamlined route handles an inheritance.

Key takeaways

• The inheritance itself is generally not US income. A bequest is excluded from gross income; what the IRS wanted was the income the account earned after it became yours, plus the information returns.
• Three filings usually went missing: interest or dividends on Form 1040, the FBAR (FinCEN Form 114), and Form 3520 for a large bequest from a foreign person. Form 8938 and Form 8621 can also apply.
• SDOP is an amended-return procedure. The IRS requires that you previously filed a US tax return, if one was required, for each of the most recent three years whose due date has passed. If you never filed at all, SDOP is not available as it stands.
• The penalty base only counts years the asset should have been reported. Years before the account became yours do not enter the calculation unless you already had a financial interest or signature authority — for example as a joint holder.
• Previously assessed penalties are not abated. If the IRS has already assessed a Form 3520 penalty, streamlined filing will not reverse it.
• Willfulness is the threshold question. Inherited accounts often carry a strong non-willful story, but it has to be true and it has to be documented.

Is inheriting a foreign bank account taxable in the US?

Generally, no — not the inheritance itself. Property you receive as a bequest is excluded from your gross income, and the US does not charge an inheritance tax on the recipient. Any estate tax is a matter for the estate of the person who died, and a parent who was neither a US citizen nor US-domiciled is usually outside US estate tax on non-US assets altogether.

What the IRS does tax is what happens afterwards. Once the account is yours, the interest, dividends and gains it produces are your worldwide income as a US citizen, green card holder or resident under the substantial presence test. That income belonged on your Form 1040 every year, converted to dollars, whether or not you ever moved the money to the US.

Your cost basis also matters. Inherited property generally takes a basis equal to its fair market value at the date of death, which means a portfolio inherited years ago may carry far less built-in gain than you fear. Inherited foreign funds are the exception to watch: they are frequently passive foreign investment companies (PFICs) reported on Form 8621, with their own basis and reporting rules. Get them identified early, because they change the shape of every amended return.

Which filings did the inheritance trigger?

The FBAR threshold is the simplest of these. The IRS states that you must file if "the aggregate value of those foreign financial accounts exceeded $10,000 at any time during the calendar year reported", counting every foreign account together, not each one alone (IRS FBAR guidance, as read on 23 October 2026). The FBAR is due 15 April with an automatic extension to 15 October. An inherited account that tips your total over that line creates an FBAR obligation covering every foreign account you hold, including a small current account you kept from before you emigrated.

Form 3520 is the one that surprises people. It is an information return, not a tax: a reportable bequest from a foreign person produces no US tax, but failing to file the form can still produce a penalty measured against the amount received. If you already have a letter from the IRS about a late Form 3520, read our guide to the Form 3520 inheritance trap before you do anything else.

When did your reporting obligation actually start?

This is the question that sets the size of the problem, and it is often answered wrongly in both directions.

Your FBAR obligation starts when you have a financial interest in the account or signature authority over it. For most heirs that is the point the account passes into their name. But two situations push the start date earlier:

• You were already a joint holder. Many families add a child to a parent's account years before death, for convenience. As a joint owner you had a financial interest from that point, and the FBAR obligation ran from then — not from the date of death.
• You held signature authority. A power to operate an elderly parent's account can create an FBAR obligation on its own, even with no ownership.

Equally, people often assume the problem goes back further than it does. If the account only became yours two years ago, the years before that are not your FBAR years and not part of your penalty base. During a long estate administration the account may sit with a foreign executor; whether and when you held a financial interest in that period is a fact to pin down from the probate papers, not a point to guess.

Does SDOP work for an inherited account?

For most US residents, yes — the IRS designed it for precisely this situation. Under the IRS's SDOP rules, you are eligible if you fail the non-residency test for the foreign track, you "have previously filed a U.S. tax return (if required) for each of the most recent 3 years for which the U.S. tax return due date (or properly applied for extended due date) has passed", you failed to report income from a foreign financial asset and possibly to file FBARs or information returns such as Forms 3520 and 8621, and those failures resulted from non-willful conduct.

In practice an SDOP submission for an inherited account contains:

• Amended returns on Form 1040-X for the three covered years, adding the foreign income and attaching every missing information return, including Form 3520 and any Form 8621.
• Delinquent FBARs for the six most recent years whose FBAR due date has passed, filed electronically through the BSA E-Filing System.
• Form 14654, the certification by a US person residing in the US, with your non-willful narrative and the penalty computation.
• Payment of the tax, interest and the miscellaneous offshore penalty.

The IRS says a taxpayer who follows these instructions "will be subject only to the Title 26 miscellaneous offshore penalty and will not be subject to accuracy-related penalties, information return penalties, or FBAR penalties". That last phrase is what makes SDOP valuable for an heir: Form 3520 penalties are information return penalties, and the procedure takes them off the table for the years it covers. The IRS is equally clear that "any previously assessed penalties with respect to those years, however, will not be abated" — which is why the order of events matters if a penalty notice has already arrived.

For the full mechanics of both tracks, including when a recent immigrant can still use the penalty-free foreign track, see how the streamlined filing compliance procedures work end to end. If you hold a green card, the residency question has its own wrinkle, covered in green card holders choosing between SDOP and SFOP.

How does the penalty treat an inherited account?

The miscellaneous offshore penalty is a fixed percentage of the highest aggregate year-end balance of the assets subject to it, measured across the covered years. The rule that matters for heirs is which years an asset counts in. The IRS says an asset is subject to the penalty in a year only if it "should have been, but was not, reported on an FBAR" or on Form 8938 for that year, or was reported but its income was not.

So an account that became yours in the final year of the lookback is counted only in that year. An account you held jointly with a parent for a decade is counted across the whole period. And an account whose income was fully reported and which appeared on every FBAR is not in the base at all, even if it sits alongside one that was missed. Because the penalty uses the highest single year, the date the inheritance landed in relation to the year-end balances can change the figure substantially. Map each account, year by year, before computing anything.

What if you never filed US returns at all?

SDOP is not a delinquent-return procedure. The IRS instructions say plainly: "You may not file delinquent income tax returns (including Form 1040, U.S. Individual Income Tax Return) using these procedures." Some recent immigrants with modest US income never filed, believing they were below the filing threshold. Their options are different:

One point on that table deserves a caution. The IRS's current page of options for taxpayers with undisclosed foreign financial assets lists three routes: the Voluntary Disclosure Practice, the streamlined procedures and the delinquent international information return procedures. Older guidance often describes a separate procedure for late FBARs alone; it is not on that list as read on 23 October 2026, so do not rely on advice that assumes it.

How do you show the failure was non-willful?

The IRS defines non-willful conduct as "conduct that is due to negligence, inadvertence, or mistake or conduct that is the result of a good faith misunderstanding of the requirements of the law." Inheritance cases often fit that definition naturally: the account was opened by someone else, statements arrived in another language or went to a relative, you received no US tax advice when the estate settled, and you did not move or conceal the money.

The narrative on Form 14654 has to be specific and has to match the documents. Facts that cut the other way — closing the account soon after a bank's FATCA letter, moving funds between countries to avoid reporting, or being told about the FBAR and ignoring it — need a frank conversation before anyone signs. Our guide to what non-willful really means sets out how the IRS reads these facts.

What should you gather first?

• The death certificate, will or succession papers, and the date the account passed to you.
• Account opening documents showing whether you were ever a joint holder or signatory.
• Year-end statements for every year in the six-year FBAR period, for every foreign account you hold.
• Annual interest, dividend and sale figures for the three covered tax years.
• Fund names and holdings, so any PFICs can be identified.
• Copies of the US returns you filed for the covered years, and any IRS notices received.

Every streamlined submission is signed by the taxpayer, and Form 14654 is a certification under penalties of perjury. Next Tax Source prepares the amended returns, FBARs and penalty computation to a ready-for-signature state; an IRS Enrolled Agent reviews the file; you sign and submit. If an inherited account is sitting unreported, book a consultation and bring the probate papers — the date the account became yours is where every calculation starts.