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FBAR maximum account value: how to calculate it
The FBAR maximum account value is the highest balance in each foreign financial account at any point during the calendar year – not the December 31 closing balance. Convert that peak balance to USD using the Treasury Reporting Rates of Exchange for December 31 of that year.
If the aggregate of these maximum values across all your foreign accounts exceeded $10,000 at any time during the calendar year, you must file FinCEN Form 114. For calendar year 2025, the FBAR filing deadline is April 15, 2026, with an automatic extension to October 15, 2026 – no request needed.
How to calculate FBAR maximum account value – at a glance:
- Find the peak balance in each account's native currency at any point during the calendar year.
- Convert to USD using the December 31 Treasury Reporting Rate of Exchange for that year.
- Round up to the next whole dollar and report the result on FinCEN Form 114.
Our FBAR filing guide covers the full filing requirements and 2026 deadlines.
What is the maximum account value for FBAR?
The maximum account value in FBAR reporting is the greatest value of currency or nonmonetary assets in a foreign financial account at any single point during the calendar year. This definition comes from FinCEN's maximum value guidance.
It is not the balance on December 31, not the average balance, and not the balance on the date you file.
Each foreign account has its own maximum account value. You determine it separately for every reportable account – then add them together to see whether you meet the $10,000 aggregate filing threshold.
Maximum account value vs. year-end balance
| Maximum account value | Year-end balance | |
|---|---|---|
| What it measures | Highest balance at any point during the year | Balance on December 31 only |
| Used for | FBAR reporting – FinCEN Form 114, Item 15 | Not used for FBAR |
| Why it matters | Captures the true peak exposure, even if the account was drawn down later | Understates the account's actual high-water mark |
Based on a TFX client scenario: A US citizen held a UK savings account that peaked at £15,000 in April 2025 but dropped to £4,200 by December 31. The FBAR maximum account value is based on the £15,000 peak – not the £4,200 year-end balance.
How to determine the FBAR maximum account value
The FBAR maximum account value is calculated by identifying the peak balance in each account's native currency, converting that peak to USD using the applicable December 31 Treasury rate, and rounding the result up to the next whole dollar.
The FinCEN FBAR instructions describe this method in detail.
The workflow below breaks this calculation into five concrete actions, from gathering records to retaining your calculation.
| Step | What to do | Output |
|---|---|---|
| 1. Collect records | Gather monthly statements, online transaction histories, and year-end summaries for every foreign account held during 2025 | A complete record set for each account |
| 2. Find the peak balance | Identify the highest value of currency or nonmonetary assets in each account at any point during the calendar year | One peak figure per account, in the account's native currency |
| 3. Convert to USD | Divide each peak balance by the applicable December 31 Treasury Reporting Rate of Exchange – Treasury publishes the rate as foreign-currency units per one US dollar, so dividing, not multiplying, converts the balance to USD | One USD figure per account |
| 4. Round up | Round each converted figure up to the next whole dollar – not to the nearest dollar | The reportable FBAR maximum account value for each account |
| 5. Retain the calculation | Keep the source statements, the exchange rate used, and your conversion workpaper | A defensible record for at least five years |
This is the individual-account calculation. It is separate from the aggregate $10,000 threshold test, which determines whether you must file at all – see "What counts toward the FBAR aggregate maximum account value" below.
Identify the peak balance
The peak balance is the highest value of funds or assets in the account at any single moment during the calendar year. Periodic account statements can be used to determine this value, provided the statements fairly reflect the maximum account value during the year. This standard comes from the FinCEN Form 114 instructions.
Where to look for the peak balance:
- Monthly or quarterly bank statements
- Online transaction histories showing daily balances
- Transaction-level records for accounts with frequent activity
- Year-end account summaries issued by the financial institution
For accounts denominated in USD, the peak balance is the maximum USD figure on record – no currency conversion is needed.
If statements are incomplete:
- Request historical records directly from the financial institution.
- Document which periods are unavailable and why.
- Use the highest balance reflected in the records you do have.
- Keep correspondence showing your efforts to obtain the missing records.
Based on the TFX client scenario: A US permanent resident held a checking account in Germany. Monthly statements showed a high of €8,400 in March and a year-end balance of €3,100. The peak balance for FBAR purposes is €8,400, not €3,100.
If the account is co-owned with a spouse, our joint FBAR filing guide covers the reporting rules.
Convert to USD using the December 31 Treasury rate
Formula: Foreign-currency peak balance ÷ applicable December 31 Treasury Reporting Rate of Exchange = FBAR maximum account value in USD. Treasury publishes the rate as foreign-currency units per one US dollar, so divide rather than multiply.
Use the Treasury Reporting Rates of Exchange for December 31 of the reporting year – not the rate on the date the peak occurred, the IRS yearly average, or your bank's applied rate.
If Treasury publishes no rate for the account's currency, the FinCEN Form 114 instructions allow any verifiable rate, as long as you record its source.
After conversion, round the result up to the next whole dollar – a converted value of $10,200.15 is reported as $10,201.
Illustrative calculation – not an official rate: If a foreign account peaked at €12,000 and the applicable December 31 Treasury rate were 0.93 euros per US dollar, the reported value would be €12,000 ÷ 0.93 = $12,903.23, rounded up to $12,904.
FinCEN requires you to report every FBAR maximum account value in USD, not in the account's local currency.
Our FBAR exchange rate guide walks through the full conversion process step by step.
If you hold a Wise or Revolut account, our guide to fintech accounts on FBAR explains how reportability is determined.
What if the FBAR maximum account value is unknown?
If you cannot determine the maximum value of a foreign account, FinCEN Form 114 Item 15a includes an "amount unknown" checkbox. Check the box and complete all other required account fields – including the institution name, account number, and account type.
An empty Item 15 field is not the same as a checked "amount unknown" box. Leaving the field blank without checking Item 15a does not establish that you attempted to report the value.
If records are missing, try to reconstruct the value before checking Item 15a:
- Request duplicate statements from the financial institution.
- Review deposit and withdrawal records, wire transfer confirmations, or tax documents that reference the account.
- Check whether the account appeared on a prior-year FBAR or Form 8938 with a reported value.
- Preserve all correspondence showing your efforts to obtain the records.
- Document in writing why the maximum value cannot be determined.
Where you can reasonably approximate the highest balance from the records available, report that approximation rather than checking "amount unknown." FinCEN defines the maximum value as "a reasonable approximation," not an exact figure.
Transfers between accounts – how double counting works
Every reportable foreign account is listed separately on the FBAR with its own maximum value. Transfers between your own foreign accounts do not allow you to net balances – the transferred amount is counted independently in each account.
FBAR is an informational report. There is no tax assessed on the amounts reported, so reporting the same funds twice – once in each account – has no financial consequence. There is, however, a compliance consequence for reporting a value lower than the true peak.
Dated timeline example:
| Date | Event | Account A – France | Account B – Germany |
|---|---|---|---|
| January 15 | Account A reaches its peak | $12,000 – peak | $1,000 |
| March 1 | $8,000 transferred from A to B | $4,000 | $9,000 |
| April 10 | Account B reaches its peak | $4,000 | $9,000 – peak |
Each account reports its FBAR maximum account value before transfer independently. Account A reports $12,000. Account B reports $9,000. The combined FBAR figure is $21,000, even though no more than $13,000 existed in the two accounts combined at any single moment.
Schedule B and FBAR
Your federal tax return's Schedule B, Part III, line 7a asks two questions: whether you had a financial interest in or signature authority over a foreign financial account, and whether you are required to file FinCEN Form 114.
Schedule B does not determine willfulness. However, courts have sometimes cited a signed Schedule B with an incorrect answer as one piece of evidence when evaluating whether a taxpayer's failure to file was willful.
If you previously netted transfers incorrectly, our guide to amending an FBAR explains how to correct the filing.
Special cases
Seven account situations require specific treatment when determining the FBAR maximum account value. Each follows a rule set by the FinCEN Form 114 instructions that overrides the general peak-balance method.
The following table covers the most common special cases and the correct reporting treatment.
| Account type | How to report | Important note |
|---|---|---|
| Joint account – both owners are US persons | Each US-person owner reports the full peak balance independently – not a proportional share | Spouses may file a single joint FBAR only if all accounts are jointly owned, the filing spouse reports every account, and both spouses sign Form 114a |
| Signature authority only – no financial interest | Full peak balance using the same calculation method | Certain exceptions exist for officers and employees of listed companies, banks, and SEC-registered entities – see signature authority |
| Account closed during the year | Report the maximum value before closure | An account open for even one day during the year counts toward the aggregate threshold |
| Brokerage or securities account | Maximum total value of all holdings – cash, stocks, bonds, funds – at any point during the year | Value fluctuates with market prices; use the highest aggregate account value, not just the cash portion |
| Term deposit or CD | The face value of the deposit plus any accrued interest reflected in the account value | Early-withdrawal penalties do not reduce the reportable maximum |
| Retirement or pension account | Full peak balance; most foreign pensions are reportable | The narrow exemption under 31 CFR 1010.350(g)(4) covers only foreign accounts held by or on behalf of a qualifying US retirement plan or IRA under IRC sections 401(a), 403(a), 403(b), 408, or 408A. It does not cover foreign-country pension plans, even those structured like an IRA or 401(k) – those generally remain reportable. |
| Negative balance | Report $0 – not a negative number | Per FinCEN Form 114 instructions, Item 15 |
Account classification and reporting exceptions can be fact-specific. If you hold cryptocurrency in a foreign exchange account, our crypto FBAR guide covers how reportability is determined under current FinCEN guidance.
Common mistakes when reporting the FBAR maximum account value
The following five errors are the ones we see most often at TFX. Each has a defined correct approach per FinCEN guidance.
Error-and-fix checklist:
- Using the year-end balance instead of the peak balance. The FBAR maximum account value is the highest balance at any point during the year, not the December 31 closing figure. Review monthly statements to find the actual peak.
- Applying the wrong exchange rate. Use the Treasury Reporting Rates of Exchange for December 31 of the reporting year – not the rate on the date the peak occurred, not the IRS yearly average, and not your bank's transaction rate.
- Failing to report a closed account. An account that was open at any time during the calendar year counts toward the aggregate threshold and must be reported with its maximum value before closure.
- Netting transfers between accounts. Each account reports its own independent peak balance. Transferring $8,000 from Account A to Account B does not reduce Account A's reported maximum.
- Rounding down instead of up. FinCEN requires rounding to the next whole dollar, not to the nearest dollar. A converted value of $10,200.01 is reported as $10,201.
Pre-filing checklist:
- Confirm the peak balance – not the year-end balance – for every account.
- Verify the December 31 Treasury rate was used for all currency conversions.
- Include closed accounts with their pre-closure peak values.
- Report each account's value independently, without netting transfers.
- Round up to the next whole dollar.
- Retain source statements, rate documentation, and conversion workpapers.
Penalties
Failure to report foreign accounts or reporting an incorrect maximum account value can trigger FBAR penalties. For penalties assessed on or after January 17, 2025: non-willful violations carry a maximum penalty of $16,536 per annual FBAR report – calculated per report, not per account, following Bittner v. United States, 598 US 85 (2023).
Willful violations carry the greater of $165,353 or 50% of the unreported account balance per account per year – 31 USC § 5321.
These are inflation-adjusted maximums, not automatic assessments. The IRS has discretion, and actual amounts depend on the facts of each case.
Our FBAR penalties guide covers the full breakdown of willful and non-willful amounts, plus available relief options.
What counts toward the FBAR aggregate maximum account value?
The aggregate FBAR value is the sum of the maximum account values across all your foreign financial accounts. It determines whether you must file – but it is separate from the individual maximum you report for each account on the form.
How the aggregate test works: Add each account's peak balance, converted to USD, together. If the total exceeds $10,000 at any point during the calendar year, you must file FinCEN Form 114 and report every foreign account you held during the year – including accounts with small balances.
Three-account example:
| Account | Peak balance – USD | Month of peak |
|---|---|---|
| UK checking | $6,200 | March |
| UK savings | $3,100 | July |
| German brokerage | $1,800 | October |
| Aggregate | $11,100 | – |
The aggregate exceeds $10,000, so all three accounts must be reported. The peaks occurred in different months – the aggregate test does not require the accounts to peak simultaneously. It adds each account's independent maximum, regardless of when during the year that maximum occurred.
Once the filing obligation is triggered, you report each account with its own maximum value. Account-level reporting is not affected by what the other accounts held.
The $10,000 threshold is set by Treasury regulation under 31 USC § 5314 – specifically 31 CFR 1010.306(c). It is not indexed for inflation and has remained at $10,000 since the rule was established.
FBAR vs Form 8938 maximum value rules
FBAR and Form 8938 – the FATCA reporting form – both require reporting foreign financial assets, but they use different value rules, different thresholds, and go to different agencies. Filing one does not satisfy the other.
FBAR filing requires reporting the maximum account value for each foreign financial account. Form 8938 reports specified foreign financial assets – a broader category that includes non-account holdings such as foreign stock and partnership interests.
| Category | FBAR – FinCEN Form 114 | Form 8938 – FATCA |
|---|---|---|
| Filed with | FinCEN via BSA E-Filing | IRS, attached to Form 1040 |
| Threshold – US residents | $10,000 aggregate, any point during year | $50,000 year-end / $75,000 any point – single; $100,000 / $150,000 – MFJ |
| Threshold – living abroad | $10,000 aggregate, any point during year | $200,000 year-end / $300,000 any point – single; $400,000 / $600,000 – MFJ |
| Assets covered | Foreign financial accounts only – bank, brokerage, mutual fund, pension, cash-value insurance | Foreign financial accounts plus non-account holdings – foreign stock, partnership interests, certain foreign insurance |
| Maximum value reported | Per account – highest balance during the year | Per asset – maximum value during the year or value on last day of year, depending on the asset |
| Currency conversion | December 31 Treasury Reporting Rate only | Treasury rate or another verifiable rate, per Form 8938 instructions |
| Deadline | April 15, auto-extended to October 15 | With income tax return – follows Form 1040 extensions |
| Required without income? | Yes – FBAR is not a tax form | No – only required if a return is required |
Based on TFX client scenario: A US citizen living in Spain holds a €180,000 savings account and a directly held foreign stock worth €30,000.
The savings account triggers both FBAR – the aggregate exceeds $10,000 – and Form 8938 – total specified foreign financial assets exceed $200,000 at year-end for a single filer abroad.
The directly held stock is reportable on Form 8938 but not on the FBAR, because it is not held in a financial account.
Our FBAR vs. Form 8938 comparison covers the full threshold and reporting differences in detail.
Records to keep for maximum account value calculations
FinCEN requires you to retain FBAR-related records for at least five years from the April 15 FBAR due date. This requirement is codified at 31 CFR 1010.420.
Records must be available for inspection by FinCEN or the IRS on request.
Retention checklist – keep the following for each reported account:
- Account statements showing the peak balance during the calendar year
- Transaction histories used to identify the highest value
- Name and address of the foreign financial institution
- Account number and account type
- The original currency of the account
- The exchange rate source used – Treasury rate or alternative verifiable rate
- Your USD conversion calculation and the final reported value
- The BSA E-Filing confirmation page and tracking ID
Records you should also keep:
- A copy of the filed FinCEN Form 114
- Documentation of any periods where statements were unavailable, and the steps taken to obtain them
- If the Item 15a "amount unknown" box was checked: a written explanation of why the value could not be determined
Retaining a clear calculation trail supports accurate future corrections and professional review. If you later discover an error, a complete record set makes it far easier to correct the FBAR.
FAQ
The FBAR maximum account value is the highest balance in each foreign financial account at any point during the calendar year, converted to USD using the December 31 Treasury Reporting Rate of Exchange – per the FinCEN Form 114 instructions.
The highest balance during the year. The year-end balance on December 31 is not used for FBAR reporting.
Use the Treasury Reporting Rates of Exchange for December 31 of the reporting year. If no Treasury rate is available for your currency, use any verifiable exchange rate and provide the source in your records.
Check the "amount unknown" box – Item 15a – on FinCEN Form 114 and complete all other required account fields. Where possible, report a reasonable approximation rather than leaving the value blank.
Transfers do not reduce total FBAR exposure. Each account reports its independent peak balance – the transferred funds are counted separately in each account.
Report $0. FinCEN Form 114 instructions direct filers to enter zero for any account with a negative balance.
Yes. Each US-person owner reports the full balance, not a proportional share. Spouses may file a single joint FBAR only if all accounts are jointly owned and both sign Form 114a. Our joint FBAR filing guide explains the rules.
No. The FBAR filing threshold is $10,000 in aggregate foreign account value at any point during the year. Form 8938 thresholds start at $50,000 for single US-resident filers and $200,000 for single filers living abroad. The two are separate obligations.
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