FBAR for US Expats in NZ: Which Accounts Count and a $12,000 Aggregate Worked Example
If you are a US citizen or green-card holder living in New Zealand and the combined peak balance of all your NZ accounts — everyday account, savings, term deposits, KiwiSaver and most Sharesies/InvestNow holdings — crossed USD 10,000 at any single moment during the calendar year, you must file an FBAR (FinCEN Form 114). It is the highest balance the account ever reached that counts, not the December 31 figure, and you add the peaks of every account together to test the threshold.
FBAR is triggered when the aggregate maximum value of all your foreign financial accounts exceeded USD 10,000 at any time in the calendar year. It is filed electronically with FinCEN — not with your tax return — due 15 April with an automatic extension to 15 October. There is no tax due on the FBAR; it is an information report. Source: IRS – Report of Foreign Bank and Financial Accounts (FBAR).
What FBAR actually is (and is not)
The Report of Foreign Bank and Financial Accounts — FBAR — comes from the Bank Secrecy Act, not the Internal Revenue Code. That distinction matters: it is an information report filed with FinCEN (the Financial Crimes Enforcement Network), the bureau of the US Treasury that tracks money flows, rather than a tax form you attach to your 1040. You owe no tax on it. You are simply telling the US government, "here are the accounts I hold outside the United States."
For a US person living in New Zealand that is almost everything: your ANZ, ASB, Kiwibank or Westpac transaction account, your savings account, any term deposit, your KiwiSaver, and the cash and securities sitting inside Sharesies or InvestNow. The reporting obligation is owned by the individual — the NZ bank does not file it for you, and most NZ providers will never even mention it.
- USD 10,000 aggregate, not per account. Add the peak balances of every NZ account together; if the total tops USD 10,000 at any point, every account becomes reportable.
- Peak balance, not year-end. The number that counts is the highest the account ever reached during the year — even for one day.
- KiwiSaver is generally reportable. Practitioners treat KiwiSaver as a foreign financial account for FBAR; the IRS retirement-account exception is narrow and does not reliably cover it.
- It is an information report, not a tax. Filed with FinCEN on Form 114, due 15 April, auto-extended to 15 October. No money changes hands.
- Penalties are severe for non-filing — which is exactly why expats who owe zero US tax still need to file.
The USD 10,000 trigger: why peak balance, not year-end, is what counts
This is the single most misunderstood rule, and it catches careful people out. The IRS states you must file if "the aggregate value of those foreign financial accounts exceeded $10,000 at any time during the calendar year" (IRS FBAR page). Read that phrase literally. It is not your balance on 31 December. It is the highest the money ever climbed.
Two consequences flow from this:
- Money that passes through still counts. If you sold a car for NZD 15,000, the cash sat in your ANZ account for three days, then you paid off a debt — that NZD 15,000 is your peak balance even though the account ended the year near zero.
- You aggregate the peaks. You do not need any single account to top USD 10,000. You add each account's own highest point together. Three accounts that each peaked at USD 4,000–6,000 on different days can blow past the threshold combined.
A subtle but important point: you report each account's individual maximum value separately on the form. The aggregation is only used to decide whether you must file at all. Once you are over the line, every reportable account gets listed at its own peak.
Worked example: $6,000 ANZ + $4,000 KiwiSaver + $3,000 savings = $13,000
Meet Daniel. Daniel is a 34-year-old US citizen from Oregon who moved to Wellington in 2023 on a partner visa. He has never earned much in New Zealand and assumes he is "too small" to worry about US forms. During 2025 his three NZ accounts hit these peak (maximum) balances at various points in the year:
| Account | Provider | Peak balance (NZD) | Peak balance (USD)* |
|---|---|---|---|
| Everyday / transaction | ANZ | NZD 10,000 | USD 6,000 |
| KiwiSaver | Default provider | NZD 6,670 | USD 4,000 |
| Online savings | ANZ | NZD 5,000 | USD 3,000 |
| Aggregate | NZD 21,670 | USD 13,000 |
*Converted at an illustrative year-end Treasury rate of NZD 1.667 per USD 1. Always use the official published rate for the year you are filing — see the conversion section below.
Step 1 — find each account's own peak. Daniel reviews twelve months of statements for each account and notes the single highest balance each one reached, regardless of the date.
Step 2 — convert each peak to USD. He divides each NZD peak by the year-end exchange rate (here, 1.667): NZD 10,000 ÷ 1.667 ≈ USD 6,000; NZD 6,670 ≈ USD 4,000; NZD 5,000 ≈ USD 3,000.
Step 3 — add the USD peaks. USD 6,000 + USD 4,000 + USD 3,000 = USD 13,000.
Step 4 — compare to USD 10,000. USD 13,000 is over the threshold. Daniel must file an FBAR, and he must list all three accounts — including the KiwiSaver — at their individual peak values, even though no single account reached USD 10,000 on its own.
Notice what defeats the "I'm too small" instinct: the trigger is aggregate and uses peaks. Daniel never had more than about USD 6,000 in any one place, and his year-end balances were lower still — yet he is squarely a filer.
Which NZ accounts are FBAR-reportable?
FBAR covers "financial accounts" held at a foreign institution — bank accounts, securities/brokerage accounts, and many pooled investment vehicles. Here is how the common New Zealand holdings line up.
| NZ account type | FBAR-reportable? | Notes |
|---|---|---|
| ANZ / ASB / Kiwibank everyday & savings | Yes | Standard foreign bank accounts — always counted toward the aggregate. |
| Term deposits | Yes | A term deposit is a bank account with a fixed maturity; include its peak balance. |
| KiwiSaver | Yes (in practice) | Treated as a foreign financial account. The IRS retirement-plan exception is narrow and is not relied on for KiwiSaver by most cross-border advisers. |
| Sharesies (cash + investments) | Yes | A foreign-held investment platform — the account itself is reportable on FBAR. |
| InvestNow | Yes | Same logic: a foreign investment/securities account. |
| NZ-based crypto wallet on an exchange | Often yes | Custodial exchange accounts are increasingly treated as reportable; check current FinCEN guidance. |
The IRS lists a limited set of FBAR exceptions — including certain US-recognised retirement plans and accounts where someone else files the FBAR on your behalf (IRS FBAR page). The catch for expats: those exceptions are written around US plans (such as IRAs and US employer plans). KiwiSaver is a New Zealand scheme and does not sit comfortably inside them, so the prudent and near-universal practice is to report it.
FBAR (FinCEN Form 114) is a separate obligation from Form 8938 (the FATCA "Statement of Specified Foreign Financial Assets"), which has different and generally higher thresholds and is filed with your 1040. Many NZ expats need both. And reporting your KiwiSaver or Sharesies on FBAR does not resolve the much thornier income-tax question of whether those holdings are PFICs or fall under the FIF regime. FBAR is just the disclosure layer.
Converting NZD peaks to USD: the year-end Treasury rate
FinCEN's FBAR instructions tell filers to convert each foreign-currency maximum value into US dollars using the US Treasury's published exchange rate for the last day of the calendar year — that is, the Bureau of the Fiscal Service "Treasury Reporting Rates of Exchange" as of 31 December (or the most recent rate if none is published on that exact date). You use one single year-end rate for the whole return, not the rate on the day each balance peaked.
Practically:
- Find each account's highest balance during the year in NZD.
- Pull the official Treasury year-end NZD–USD rate from the Treasury Reporting Rates of Exchange dataset for the relevant year.
- Divide each NZD peak by that rate to get USD (the dataset quotes NZD per USD, so you divide).
- Round to the nearest dollar; if a value is unknown, the form lets you check a box rather than guess.
Because the Treasury rate changes every year, never reuse last year's figure. The illustrative 1.667 used in Daniel's example is a stand-in; confirm the actual published rate for your filing year before you file.
FinCEN Form 114: filing mechanics, deadlines and joint accounts
How and where you file
FBAR is filed electronically through FinCEN's BSA E-Filing System. It is free, it is online, and it is entirely separate from your federal tax return — you cannot mail it and you do not attach it to your 1040. You report each account's name, the institution, an account number and that account's maximum value for the year.
The deadlines
The FBAR is due 15 April of the year following the calendar year being reported. If you miss that, there is an automatic extension to 15 October — you do not have to request it (IRS FBAR page). For expats who are also extending their 1040, the practical effect is that both typically land by mid-October.
Joint accounts
If you hold an account jointly — for example, a shared everyday account with a New Zealander spouse — you generally report the full maximum value of that account, not your half. You do not divide it. If both account holders are US persons, each files an FBAR (and one can elect to file jointly in defined circumstances). Where only one spouse is a US person, that spouse reports the entire joint balance, while the non-US spouse has no FBAR obligation.
Suppose Daniel's online savings account is actually joint with his NZ-citizen partner, Aroha, and it peaked at NZD 5,000 (USD 3,000). Daniel does not report USD 1,500 (his "half"). He reports the full USD 3,000 peak on his own FBAR. Aroha, as a non-US person, files nothing. The aggregate test, and the value listed, both use the full joint balance.
What happens if you have never filed?
Plenty of US citizens in New Zealand discover the FBAR rule years after they should have been filing. The penalties for wilful non-filing are deliberately steep — which is precisely why people who owe no US tax at all still need to take this seriously. The good news is that the IRS runs streamlined and delinquent-filing programmes designed for exactly this situation: taxpayers who were non-wilful and simply did not know. These let you file back FBARs (commonly the past several years) and, where relevant, amended returns, often without penalty. If this is you, do not panic-file a single year — get advice on the right programme first, because the choice of route matters.
FBAR for US expats in NZ — FAQ
Is my KiwiSaver reportable on the FBAR?
In practice, yes. KiwiSaver is treated as a foreign financial account for FBAR purposes, so its peak balance counts toward the USD 10,000 aggregate and is listed on Form 114 if you have to file. The IRS retirement-account exception is written around US plans like IRAs and does not reliably cover a New Zealand scheme, so cross-border advisers almost always report it.
Does my balance on 31 December decide whether I file?
No. The test is the maximum value each account reached at any time during the calendar year. Money that briefly passed through an account counts even if the account ended the year empty. You then add each account's peak together to test the USD 10,000 threshold.
None of my accounts individually held USD 10,000 — do I still file?
Possibly yes. The threshold is the aggregate of all foreign accounts. If your everyday account, savings and KiwiSaver each peaked at a few thousand dollars but together topped USD 10,000 at some point in the year, you must file and list all of them — exactly as in the worked example above.
Are Sharesies and InvestNow accounts FBAR-reportable?
Yes. Both are foreign-held investment platforms, so the account itself is a reportable foreign financial account and its peak value counts. Separately, the underlying funds may also be PFICs or fall under the FIF regime for income-tax purposes — that is a different and more complex question covered in our FIF & PFIC guides.
How do I convert my NZD balances to US dollars?
Use the US Treasury's published year-end exchange rate (the Bureau of the Fiscal Service "Treasury Reporting Rates of Exchange" as of 31 December) for the year you are reporting. Apply that single rate to every account, dividing each NZD peak by the NZD-per-USD rate. Do not use the rate on the day each balance peaked.
I have never filed an FBAR — what should I do?
Do not simply file one year in isolation. The IRS offers streamlined and delinquent-filing procedures for taxpayers who were non-wilful, which can bring you current — often without penalty. Because the right route depends on your facts, get advice before you file anything.
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