New Zealand's FIF rules, and what a portfolio tracker has to know

The threshold is on cost, not value

An individual does not have to apply the FIF rules while the total cost of their attributing interests stays below NZD 50,000 through the year. Inland Revenue's Guide to foreign investment funds (IR461, April 2026) is the authority on this, and two details in it do most of the damage:

• Any single day counts. The exemption is lost if the cost of your attributing interests exceeds the threshold at any point in the year — not at year end, and not on average. A purchase in August that you sell down by March still puts the year inside the rules.
• It is a cliff, not an allowance. Once the threshold is passed, the first NZD 50,000 is not exempt. The guide says so plainly. There is no tax-free tranche underneath.

So the number that decides whether the rules apply to you is a running total of purchase cost, in New Zealand dollars, across every overseas holding and every broker, on every day of a tax year that runs 1 April to 31 March. Almost no portfolio screen shows that. Screens show market value, and market value is the wrong input for this test.

FDR measures a different number, on a different day

Once you are inside the rules, several calculation methods exist — fair dividend rate (FDR), comparative value (CV), the cost method, deemed rate of return, the revenue account method and the attributable FIF income method. Which one you may use, and which you should, is a question for your accountant.

What matters for record-keeping is what the common one consumes. FDR deems income of 0.05 × the opening market value of the holding — the value on the first day of the tax year, not the cost, not today's price, and not an average. Individuals may compare the FDR result with CV and there is a quick-sale adjustment for holdings bought and sold inside the same year.

Line those up and the rules want three different measurements of the same holding:

Method names, the FDR formula and the threshold as described in IR461 (April 2026). This page does not reproduce the calculation rules — the guide and your adviser do that.

A tracker built for "what am I up?" stores none of these as first-class facts. It stores a current value and a return.

The Australian exemption, and its four conditions

This is where the New Zealand rules and Australia actually meet, and it is the clearest illustration of why a ticker is not an instrument.

Under the ASX-listed Australian share exemption, no FIF income arises from a holding where the company:

• is listed on the official list of ASX Limited;
• is an Australian resident, and is not treated as resident in another country under an agreement between Australia and that country;
• maintains a franking account; and
• is not stapled stock.

All four have to hold. A share can be listed on the ASX and still fail the test — dual-listed companies treated as resident elsewhere, entities without a franking account, and stapled structures are each common enough to matter. There is a separate exemption for an income interest of 10% or more in an Australian-resident FIF that is subject to Australian tax.

Inland Revenue publishes a tool for checking an individual share at ird.govt.nz/fif-australia-tool, which tells you something about the problem: the answer is not derivable from the ticker, so the tax authority had to build a lookup. Dividends still need to be accounted for, and gains may still be taxable if the shares were held on revenue account — the exemption is from FIF income, not from tax generally.

The underlying point is the one this whole site keeps running into: domicile and structure are data, and a holdings list that only carries a symbol and a quantity cannot answer a question posed in terms of residence, franking accounts and stapling.

What the chart cannot tell you

Put the two halves together and the gap is specific rather than vague. For a New Zealand investor with overseas holdings, an ordinary tracker does not know:

• Which holdings are even in scope. Attributing interest or not is a question about the entity, not the position.
• What each holding cost, in NZD, on the day it was bought. Multi-currency purchases across several brokers, converted at the rate that applied then.
• Whether the running cost total crossed the threshold on any day — including on a day you no longer hold anything unusual.
• Market value on 1 April, as a stored fact rather than something to be reconstructed later from price history.
• Which holdings were bought and sold inside the same year, for the quick-sale adjustment.
• Whether an ASX-listed holding satisfies all four exemption conditions.

None of that is exotic. It is simply a different set of facts than "value today, and the line that got here". Every one of them is recoverable from broker statements — which is exactly the problem, because recovering them by hand across several brokers and a year of transactions is the work people are trying to avoid.

If you are the Australian resident, not the New Zealander

Then FIF is not your regime, and anything telling you otherwise is out of date by more than a decade. The Australian foreign investment fund rules were repealed and have not applied since the 2010–11 income year; there is no accruals taxation of unrealised growth in a foreign fund for an Australian resident.

What applies instead is ordinary worldwide taxation: foreign dividends declared as foreign income, capital gains tax on disposal. That is a materially easier record-keeping problem than New Zealand's — no deemed income, no opening-value snapshot, no daily threshold — though the cross-border questions that have nothing to do with FIF still apply in full. Fund domicile still decides how much US withholding is lost before a dividend reaches you, and a US-domiciled ETF is still a US-situs asset for estate purposes wherever you live.

We mention it because "FIF in New Zealand and Australia" is a phrase that circulates, and half of it has been wrong since 2010.

Where we are with this

Plainly: BorderFolio does not compute FIF income today, and we are not going to pretend otherwise to collect a signup.

What it already does is keep the record such a calculation is built from — every holding imported from your broker statements with its purchase date, its cost in the currency it was paid in, and the domicile of the fund behind the ticker. That is the part people reconstruct by hand in a spreadsheet each March.

What we are considering next is narrower than a tax engine and safer: flagging which holdings look like attributing interests, keeping the cost total and the opening-value snapshot as stored facts rather than derived ones, and exporting the lot in a form an accountant can work from. Whether that is worth building depends on whether New Zealand investors and advisers say it is.

Limitations

• This is not tax advice, and not a FIF calculation. It describes what the rules require from a record of holdings. Which method applies to you, and what you owe, is for a New Zealand tax adviser.
• The rules are summarised, not reproduced. IR461 runs to far more than the handful of provisions named here, and exemptions, elections and special cases are left out.
• Figures and dates are as at the review date above. The threshold in particular is the subject of a bill that had not been enacted when this was written.
• The Australian exemption needs checking per share. The four conditions turn on facts about a company that change; IRD's own tool is the authority, not a list on a page.
• BorderFolio does not currently compute FIF income, and nothing here should be read as saying it does.
• See the investment & tax disclaimer.

Common questions

Does Australia have FIF rules like New Zealand?

No. Australia's foreign investment fund regime was repealed and has not applied to taxpayers since the 2010–11 income year, so there is no accruals taxation of unrealised growth in foreign funds for Australian residents. An Australian resident is taxed on worldwide income in the ordinary way instead — foreign dividends declared as foreign income, and capital gains tax on disposal. FIF in the sense most investors mean it is a New Zealand regime, and comparisons that put the two countries side by side as if both ran one are wrong.

What is the FIF de minimis threshold in New Zealand?

NZD 50,000, measured on the total cost of your attributing interests rather than their market value. Inland Revenue's guide IR461, dated April 2026, states that an individual does not need to apply the FIF rules if that total stays below NZD 50,000 throughout the year. Two details catch people out: the test is breached if the cost exceeds the threshold on any day in the year, and once it is breached the first NZD 50,000 is not exempt — the whole holding falls under the rules.

Is the NZ FIF threshold changing to $100,000?

It is proposed, not enacted. The Taxation (Annual Rates for 2026–27, FBT Simplification, Foreign Investment Funds, and Remedial Measures) Bill, introduced on 10 September 2026, proposes raising the de minimis threshold from NZD 50,000 to NZD 100,000 from 1 April 2026. Until that bill is passed the threshold in law remains NZD 50,000, which is what IRD's April 2026 guide states. Plenty of commentary already describes the higher figure as current; check the date on anything you read.

Are Australian shares exempt from New Zealand's FIF rules?

Some are, and the conditions are specific. Under the ASX-listed Australian share exemption the company must be listed on the official list of ASX Limited, be an Australian resident and not treated as resident in another country under an agreement between Australia and that country, maintain a franking account, and not be stapled stock. All four have to hold. A separate exemption covers an income interest of 10% or more in an Australian-resident FIF that is subject to tax in Australia. Inland Revenue publishes a tool for checking a specific share at ird.govt.nz/fif-australia-tool.

Why can't a normal portfolio tracker tell me my FIF position?

Because it measures the wrong things. A tracker is built around current value and profit or loss; the FIF rules turn on the cost of each attributing interest for the threshold, the market value on the first day of the tax year for the fair dividend rate calculation, and a tax year running 1 April to 31 March rather than a calendar year. It also has no view on whether a holding is an attributing interest at all, which depends on the company's domicile and structure rather than its ticker.

Does BorderFolio calculate FIF income?

No, and it is not claiming to. BorderFolio keeps the record a FIF calculation is built from — what each holding cost, in which currency, when it was bought, and where the fund is domiciled — so that you or your accountant are not reconstructing it from broker statements. The calculation itself, and the choice between methods, belongs with a tax adviser. We are gathering interest from New Zealand investors and advisers before building anything further.