If you send money home to Vietnam or keep savings at Vietcombank, ACB, or Techcombank, FBAR Vietnamese bank accounts rules probably apply to you. The rule is simple on paper: any US person whose combined foreign account balances topped $10,000 at any single moment in the year must file. In practice, most people never hear about this until a tax preparer asks the right question, or worse, until a penalty notice arrives. This guide walks through who has to file, how the threshold actually works, and what a real Vietcombank-plus-ACB balance looks like on paper.
Who Must File FBAR for Vietnamese Bank Accounts
FBAR stands for Foreign Bank and Financial Accounts Report, filed as FinCEN Form 114. It goes to the Financial Crimes Enforcement Network, not the IRS, through the BSA E-Filing System. It is a separate filing from your tax return.
Three groups of US persons must file: citizens, green card holders, and residents who meet the Substantial Presence Test. That last category catches people who assume only citizens and green card holders are on the hook. If you worked in the US long enough this year to count as a resident for tax purposes, the FBAR rule reaches you too, even on a temporary visa.
The trigger is signature authority or financial interest in a foreign account. A joint account with a parent in Da Nang counts. A savings account you opened years ago and forgot about counts too, as long as your name is still on it.
The FBAR Threshold for Vietnamese Bank Accounts Is Combined
This is where most people miscalculate. The $10,000 figure is not a per-account limit. It is the combined maximum value across every foreign account you hold, checked at any point during the year.
Say your Vietcombank savings account peaks at $6,500 in June. Your ACB account separately peaks at $4,000 in November. Neither account alone crosses $10,000. Added together, your combined peak is $10,500. FBAR Vietnamese bank accounts reporting is required that year, even though no single bank statement shows a five-figure balance.
The measurement uses the highest balance each account reached, converted to US dollars using the year-end Treasury exchange rate, then summed. You are not tracking a single running total across the year. You are pulling the peak from each account separately and adding those peaks together.
A Techcombank credit union account works the same way. So does a small business account tied to a family shop in Vietnam. Any account you can access counts, regardless of how small the balance feels on its own.
A Worked FBAR Example: Vietnamese Bank Accounts at Two Banks
Numbers make this concrete. Here is a plausible year for someone sending money home and keeping a small reserve at two banks.
| Account | Highest Balance in Year | Month Reached |
|---|---|---|
| Vietcombank savings | $6,200 | July |
| ACB checking | $3,100 | March |
| ACB term deposit | $1,900 | December |
| Combined peak | $11,200 | — |
No single account here reaches $10,000. The combined figure does, by $1,200. This is the exact scenario that catches Vietnamese immigrants who check only their largest account and conclude they are in the clear. FBAR Vietnamese bank accounts thresholds count every account, every bank, added together.
FBAR vs FATCA for Vietnamese Bank Accounts
FBAR often gets confused with FATCA, and the two are not the same filing. FBAR is FinCEN Form 114, filed separately from your tax return, with a $10,000 combined threshold. FATCA reporting happens on IRS Form 8938, attached to your tax return, with a much higher threshold that varies by filing status and residency.
Vietcombank and other Vietnamese banks already report certain US-linked account data to the IRS under FATCA agreements. Our companion piece on what Vietcombank has already reported to the IRS covers that side in detail. The short version: you can owe FBAR, FATCA, both, or neither, depending on your balances. Check both thresholds separately every year.
Interest earned on Vietcombank, ACB, or Techcombank accounts is also fully taxable on your US return as worldwide income. That tax obligation exists whether or not you cross either reporting threshold.
FBAR Penalties for Vietnamese Bank Accounts After Bittner
The 2023 Supreme Court case Bittner v. United States changed how non-willful FBAR penalties work. Before Bittner, some courts applied the penalty per account. Now the penalty applies per report, per year.
That distinction matters enormously in practice. Someone with five unreported foreign accounts used to risk five separate $10,000 penalties. Under Bittner, a non-willful failure to file caps at $10,000 for that year’s report, regardless of how many accounts existed. Willful violations are treated far more harshly: the greater of $100,000 or 50% of the account balance, per violation.
Most Vietnamese immigrants who miss FBAR do so non-willfully. They simply never knew the rule existed. Nobody at the bank mentions it, and no US tax software flags it unless you answer a specific question correctly. That still carries risk, but it is a fixable, bounded risk rather than an open-ended one.
FBAR Vietnamese bank accounts penalties are calculated per late report, not per forgotten account, so one missed year is one exposure, not five.
Catching Up on FBAR for Vietnamese Bank Accounts
If you should have filed FBAR in prior years and didn’t, the fix is not to panic-file everything at once without a plan. The IRS Streamlined Filing Compliance Procedures exist specifically for non-willful filers who fell behind.
These procedures let you file past-due FBARs and amended returns together, with reduced penalty exposure, provided your failure to file was genuinely non-willful. A CPA experienced with FBAR catch-up cases can assess whether you qualify and prepare the filings correctly. This is not a do-it-yourself project once multiple years and multiple accounts are involved.
The April 15 deadline applies going forward, with an automatic extension to October 15. No separate extension request is needed for FBAR; it follows the same automatic extension as your tax return. Mark that date once and reuse it every year, since the rule does not change from year to year.
FAQ
Does a joint account with my parents in Vietnam count toward FBAR?
Yes. If your name is on the account, its balance counts toward your combined total, even if the money is not yours.
What if my Vietcombank balance only briefly touched $10,000?
It still counts. FBAR measures the highest balance reached at any point, not the balance on a specific date.
Do I still owe tax on Vietcombank interest if I file FBAR?
Yes. FBAR is a reporting requirement, not a tax. Interest income is separately taxable as worldwide income.
Is FBAR the same as FATCA Form 8938?
No. They are separate filings with different agencies, different thresholds, and different forms.
What happens if I never knew about FBAR and missed several years?
Look into IRS Streamlined Filing Compliance Procedures with a CPA experienced in FBAR catch-up filings.
Can the IRS see my Vietcombank or ACB account without me filing?
Possibly, through FATCA data sharing. That is a separate risk from the FBAR filing requirement itself.
Quick Summary
- FBAR Vietnamese bank accounts filing is required once your combined foreign balances exceed $10,000 at any point in the year, across all accounts.
- The threshold is combined, not per account, so a Vietcombank and ACB balance can each stay under $10,000 while still triggering the requirement together.
- Non-willful penalties now apply per report per year after Bittner v. United States, and Streamlined Filing Compliance Procedures exist for people catching up.
This post is for informational purposes only and does not constitute financial, tax, or legal advice. Laws and regulations change frequently. Please consult a qualified professional for your specific situation.