FIF Tax Explained for New Zealand Investors in 2026
Category: Tax
Reading time: 9 minutes
Published: July 2026
Author: CLIFF Edge Finance
I had no idea this tax existed — until I was already investing.
When I opened my Moomoo account in July 2024 and started buying US ETFs, I had never heard of the Foreign Investment Fund tax regime. I was focused on choosing the right ETF, understanding brokerage fees, and building a consistent investing habit. Tax was something I thought about at the end of the year, not at the start of an investing journey.
Then I started doing the research — and realised that FIF tax is the single most important thing a New Zealand investor needs to understand before their overseas portfolio grows beyond a certain threshold.
This article explains exactly what the FIF tax is, when it applies, how it is calculated, and what every New Zealand professional needs to know before they cross the threshold. It also covers the significant proposed change announced in Budget 2026 that could affect every investor reading this right now.
If you are just starting with $50 to $500 per month, you do not need to worry about FIF tax today. But you need to understand it before you reach the threshold — not after.
What is the FIF tax?
FIF stands for Foreign Investment Fund. It is a New Zealand tax regime that applies to NZ tax residents who directly hold overseas investments — primarily overseas shares, offshore managed funds, and foreign unit trusts — above a certain cost threshold.
The reason FIF exists is straightforward: Inland Revenue (IRD) wanted to prevent New Zealand residents from parking money in low-dividend overseas investments and deferring or avoiding tax indefinitely. Without FIF, you could hold a US growth ETF for twenty years, receive no dividends, pay no tax, and only be taxed when you eventually sold. FIF closes that gap by taxing a deemed return each year, regardless of whether you received any cash from your investments.
That last point is important. Under FIF, you can receive a tax bill even in a year when your portfolio went down in value and paid no dividends.
The threshold: when does FIF apply?
FIF applies when the total cost price of your directly held overseas investments exceeds the de minimis threshold.
The current confirmed threshold under IRD's IR461 guide is NZD $50,000.
However, Budget 2026, announced on 28 May 2026, proposes raising this threshold to NZD $100,000, effective from 1 April 2026 for the 2026–27 tax year. This proposal is not yet legislated and remains subject to the parliamentary process. It should be treated as a proposed change until IRD confirms the final rule. Check IRD's website and the IR461 guide for the current position before making any decisions based on this change.
For this article, we refer to both thresholds where relevant. The principles of how FIF works are identical regardless of which threshold applies.
The most important thing most investors get wrong
The threshold is calculated on cost price — not current market value.
This is the detail that surprises almost every NZ investor when they first learn it, and it has significant practical implications.
If you purchased overseas shares for NZD $48,000 and they are now worth NZD $85,000, your cost basis is still $48,000. You are below the $50,000 threshold. FIF does not apply.
Conversely, if you purchased overseas shares for NZD $55,000 and they have since fallen in value to NZD $40,000, your cost basis is still $55,000. You are above the threshold. FIF applies.
Cost price is what you originally paid, including brokerage fees paid at the time of purchase, converted to NZD at the IRD exchange rate on the purchase date. Keep every purchase confirmation from your brokerage. You will need these records.
One more critical point: the threshold applies to your total overseas holdings across all platforms combined. If you hold $35,000 on Moomoo NZ and $20,000 on another platform, your combined cost basis is $55,000. FIF applies — even if neither platform has flagged it to you.
The KiwiSaver exclusion most people miss
Here is the fact that surprises New Zealand investors most when they first learn it.
KiwiSaver does not count toward your FIF threshold.
Your KiwiSaver fund is a Portfolio Investment Entity (PIE fund). PIE funds are NZ-domiciled and handle all FIF obligations internally on your behalf. The tax is calculated and paid by the fund manager, not by you. Your KiwiSaver balance — even if it is entirely invested in overseas shares and ETFs through the fund — does not count toward your $50,000 (or proposed $100,000) FIF threshold.
This matters enormously for how New Zealand investors think about their overall portfolio. Many Kiwis assume their KiwiSaver balance is eating into their FIF threshold. It is not.
The same principle applies to other NZ-domiciled PIE funds, such as those offered by Kernel Wealth, Smartshares, and InvestNow. If you invest in overseas shares through a NZ PIE fund, FIF is handled for you and your holding does not count toward your personal threshold.
FIF applies specifically to directly held overseas investments — individual shares, overseas ETFs, and foreign managed funds that you hold personally, typically through a brokerage account such as Moomoo NZ.
How FIF income is calculated: the two main methods
If your cost basis exceeds the threshold, you must calculate and declare FIF income in your annual tax return. IRD allows several calculation methods, but two are used by the vast majority of individual investors: the Fair Dividend Rate (FDR) method and the Comparative Value (CV) method.
Fair Dividend Rate (FDR)
FDR is the default method for most individual investors, and the simpler of the two.
Under FDR, your taxable FIF income is calculated as 5% of the opening market value of your overseas investments at the start of each tax year (1 April). You pay tax on that 5% at your marginal income tax rate, regardless of what your investments actually returned that year.
Example: Your overseas portfolio had a market value of NZD $80,000 on 1 April. Under FDR, your FIF income for that year is $80,000 × 5% = $4,000. You pay tax on $4,000 at your marginal rate — say 30% — which equals a tax bill of $1,200.
This applies whether your portfolio rose 25% that year, stayed flat, or fell 10%.
FDR is simpler and more predictable because the calculation is straightforward and you know what your FIF income will be from the first day of each tax year. This makes it easier to budget for the tax obligation. Dividends received are not taxed separately under FDR — they are considered included in the 5% deemed return.
The significant downside of FDR is that you can receive a tax bill even when your portfolio lost value. If your investments fell 15% in a given year, you still pay tax on the deemed 5% return.
Comparative Value (CV)
CV calculates FIF income based on the actual increase in value of your investments during the year — capital gains plus dividends received.
Under CV, if your portfolio fell in value or earned less than 5%, you may pay less tax than under FDR. If your portfolio performed well and returned more than 5%, you will generally pay more tax under CV than under FDR.
Importantly, you can choose the lower of FDR and CV each year for the same investments as an individual investor. This means in a falling market you can elect CV to reduce your tax bill, and in a rising market you can use FDR to cap your taxable income at 5%.
However, once you choose a method for a specific asset in a given year, certain restrictions apply — particularly if you switch between methods repeatedly. Consult a tax adviser or accountant before switching methods, as the rules are specific.
Which method should you use?
At CLIFF, we use both methods depending on the market conditions and actual portfolio performance in a given year. The decision is made after reviewing the numbers at the end of each tax year — not at the beginning.
For a beginner who has just crossed the threshold, FDR is generally the practical starting point because it is simpler to calculate and understand. As your portfolio grows and your situation becomes more complex, getting advice from a tax accountant who understands NZ investing tax is the right move.
The key principle: FDR is simpler and more predictable. CV is more responsive to actual performance. Understanding both is important before you cross the threshold, so the choice is not made under pressure at tax time.
Budget 2026: the proposed $100,000 threshold
This is the most significant proposed change to NZ FIF rules in twenty-five years, and every NZ investor should be aware of it.
The $50,000 threshold has not been adjusted since it was set in 2000. After twenty-five years of asset price growth, far more ordinary investors are caught by rules originally designed for wealthier households.
Budget 2026, announced on 28 May 2026, proposes doubling the threshold to NZD $100,000 from 1 April 2026 — effectively the current 2026–27 tax year. If passed, this means investors with a cost basis below $100,000 would simply pay tax on dividends received, with no FIF calculation required.
What this means in practice if the legislation passes:
If your cost basis is currently between $50,000 and $100,000, you may no longer be subject to FIF for the 2026–27 tax year
If your cost basis is below $50,000, nothing changes — you were already outside FIF
The same cost-basis principle applies at the new threshold — it is based on what you paid, not current market value
The critical caveat: This is a proposed change. It is not yet law. IRD's current published IR461 guide still references the $50,000 threshold. Do not make portfolio decisions based solely on the proposed $100,000 threshold until legislation has passed and IRD has confirmed the final rule. Monitor IRD's website and the IR461 guide for updates.
Practical steps: where you stand right now
Here is the one action to take after reading this article.
Calculate your cost basis across all your directly held overseas investments.
Open a simple spreadsheet — or use the CLIFF Budget Tracker as a starting point — and list every overseas share and ETF you hold directly, across every brokerage platform you use. For each holding, record:
The platform it is held on
The number of shares or units held
The NZD cost price at the time of purchase (including brokerage fees), using the IRD exchange rate on the purchase date
Add up the total. That is your current cost basis for FIF threshold purposes.
If you are below $50,000, you are outside FIF today. Continue investing and track your cost basis as you buy more.
If you are approaching $50,000 (or $100,000 once the proposed threshold is confirmed as law), take these steps:
Start tracking from day one. Keep every purchase confirmation from Moomoo NZ or whichever platform you use. The IRD exchange rate on the purchase date is what counts.
Understand the FDR and CV methods before you cross the threshold, so you are not learning them under pressure at tax time.
Speak to a tax adviser or accountant who understands NZ investing tax before your portfolio approaches the threshold. The decision about which calculation method to use depends on your personal tax situation, your income level, and the specific assets you hold.
What FIF does not apply to
To clarify what is and is not inside the FIF regime:
Not subject to FIF (and does not count toward your threshold):
KiwiSaver (handled by your fund manager as a PIE)
NZ-domiciled PIE funds (Kernel, Smartshares, InvestNow Foundation Series)
NZ bank accounts, term deposits, and savings accounts
NZ shares listed on the NZX
Most individual shares in Australian-resident companies listed on the ASX (a specific exemption applies — check IRD's tool for your specific holdings)
Overseas real estate
Subject to FIF (counts toward your threshold):
Directly held US shares (e.g. individual stocks on Moomoo NZ or Hatch)
Directly held overseas ETFs (e.g. VOO, VT, or any other ETF listed on a foreign exchange)
ASX-listed ETFs that invest globally — these count toward FIF even though they are listed on the ASX
The compliance risk: do not ignore FIF
IRD receives financial account information from overseas custodians automatically through the Common Reporting Standard (CRS). This is an international information-sharing agreement that means IRD knows what you hold on overseas platforms, even if you do not tell them.
Undeclared FIF income attracts penalties and interest. If you make a voluntary disclosure before IRD begins an audit, shortfall penalties may be significantly reduced. If IRD identifies the issue first, the penalties are higher.
The message is simple: if you are above the FIF threshold, declare your FIF income in your annual tax return. If you are unsure whether FIF applies to your situation, consult a tax adviser.
Where to go from here
You now have a solid foundation in how FIF tax works in New Zealand. The next steps on CLIFF are:
Read our Investing 101 guide — if you are just starting out, begin here before worrying about FIF
Read our Moomoo NZ review — a practical overview of the platform most NZ beginners use to access US stocks and ETFs
Download the CLIFF Budget Tracker — a NZ-specific Excel template to track your income, expenses, and investing contributions each month
The most important thing you can do today is calculate your cost basis. Know where you stand. Everything else follows from that number.
CLIFF Edge Finance provides educational content only. Nothing in this article constitutes personalised financial or tax advice. FIF rules are complex and individual circumstances vary. Always consult a licensed tax adviser or accountant before making decisions based on this content. All information is based on IRD guidance current at the time of publication. Tax rules are subject to change — including the proposed Budget 2026 changes described above, which are not yet legislated. Check IRD's website and the current IR461 guide for the most up-to-date position.