The Foreign Investment Fund rules are genuinely confusing — but they don't have to be. This guide explains exactly what FIF tax is, who it applies to, and how to calculate your lowest legal tax bill.
FIF stands for Foreign Investment Fund. The FIF tax rules are a set of New Zealand tax laws that apply to Kiwi investors who hold overseas shares, ETFs, or managed funds directly — not through a NZ-based PIE fund.
The core idea is this: if you own international shares, IRD wants to tax some of that investment's growth every year — even if you haven't sold anything and haven't received a dividend. This is called attributed income, and it's what makes FIF feel so counterintuitive to most investors.
Before FIF rules existed, NZ investors could hold overseas growth assets for years, never receive any income, and never pay any tax — only getting taxed when they eventually sold. The FIF regime was introduced to prevent this, and it's been in place since 2007.
Under the most common FIF method (FDR), you pay tax on 5% of your portfolio's value at the start of the year — regardless of whether your investments actually returned that much, or anything at all. In a bad year, you can still owe FIF tax.
The good news: if you invest through NZ-based PIE funds (like Smartshares ETFs, InvestNow funds, or Kernel), the fund manager handles FIF tax for you and you never have to think about it. FIF only becomes your problem when you hold overseas investments directly — through platforms like Hatch, Sharesies (for US/international stocks), or directly with a foreign broker.
Most individual investors are protected from FIF by a de minimis threshold: if the total original cost of your overseas investments is NZ$50,000 or less, FIF rules don't apply to you. You only pay ordinary income tax on dividends received.
If you bought $48,000 of international shares and they've since grown to $90,000, you remain below the threshold. Conversely, if you paid $55,000 and the portfolio has fallen to $40,000, you're still above it. Keep your purchase confirmations.
| Investment type | Counts toward $50k? |
|---|---|
| US ETFs held directly (e.g. VOO, VTI on Hatch) | Yes |
| International shares held directly | Yes |
| UK, European, Asian ETFs | Yes |
| NZ-domiciled PIE funds (Smartshares, Kernel, InvestNow PIE) | No — excluded |
| Individual shares listed on the Australian ASX (if qualifying) | No — exempt |
| Australian ETFs or unit trusts (even if ASX-listed) | Yes |
| KiwiSaver investments | No — excluded |
| NZ shares | No — not FIF |
One critical nuance: if your cost basis crosses $50,000 on even a single day during the year, FIF rules apply to your entire portfolio for that full income year. You can't rely on your portfolio being below threshold at year end if it briefly crossed the line earlier.
It was set at $50,000 in the year 2000, and 25 years of asset price inflation means far more ordinary Kiwi investors are now caught by rules that were originally designed for the relatively wealthy. The government has proposed raising it to $100,000 from 1 April 2026 — subject to legislation passing. As of July 2026, it remains at $50,000 pending legislation expected in August/September 2026.
Even if your portfolio is over $50,000, certain investments are exempt from FIF rules entirely.
Individual shares in Australian-resident companies listed on the ASX All Ordinaries index are generally exempt from FIF — provided the company maintains a franking account. Shares in BHP, Commonwealth Bank, ANZ Australia, Fortescue and similar qualifying companies are taxed under ordinary NZ income tax rules (only dividends are taxable) rather than under FIF.
Important caveats: this exemption applies to individual shares, not Australian ETFs or managed funds. An ASX-listed ETF like a Vanguard Australia product is still a FIF interest. Use the IRD's ASX exemption tool to check a specific company.
If you invest in international shares through a NZ-based PIE fund — Smartshares US 500 ETF (USF), Kernel's global funds, InvestNow's PIE options — the fund itself handles FIF tax at the PIE rate. No personal filing required, and the tax is final. This is why many NZ investors prefer PIE funds over direct international investing once they approach the $50k threshold.
Interests in foreign superannuation schemes (Australian super funds, UK pension pots, US 401(k) plans) are generally exempt from FIF, though different rules apply when you eventually receive the funds. The US-NZ tax treaty specifically exempts IRAs and 401(k)s from FIF treatment.
If FIF applies to you, you must choose a calculation method and apply it consistently to all your FIF holdings for the year. For most individual investors, the choice is between FDR and CV. Individuals and eligible trusts can use whichever produces the lower result.
FDR is the simpler and more commonly used method. It assumes your FIF investments returned exactly 5% during the year and taxes you on that assumed income.
Formula: FIF income = (Opening market value × 5%) + quick sale adjustment
The opening market value is the NZD value of all your FIF interests on 1 April (the start of the NZ tax year).
FDR is usually better in bull market years when your portfolio returns more than 5%. If your investments grew 20%, you still only pay tax on 5% of opening value. Your actual gains beyond that 5% cap are effectively tax-free under FDR. Dividends received are included in the 5% assumption — not separately taxed.
CV taxes you on your actual portfolio performance rather than an assumed 5%. It compares the value of your investments at the start and end of the year, adds any income received, and subtracts costs.
Formula: FIF income = (Closing market value + gains received) − (Opening market value + costs incurred)
CV is usually better in flat or falling markets when your portfolio returned less than 5%. If your portfolio dropped 10%, your CV result could be zero or negative. Note: if you could have used FDR but chose CV instead, and the result is negative, it's floored at $0 — you can't use CV losses to offset other income.
| Feature | FDR | CV |
|---|---|---|
| Basis | 5% of opening market value | Actual portfolio change |
| Best in bull markets (>5% return) | Yes — you win | No — you pay more |
| Best in flat/bear markets (<5%) | No — you overpay | Yes — you win |
| Dividends separately taxed? | No — included in 5% | Yes — included in "gains" |
| Can claim FIF losses? | No | No (if FDR was available) |
| Complexity | Simple | Moderate — need closing value |
The rule is simple: calculate both, use the lower. The FIF calculator on this site does this automatically.
The FDR method has one complication: the quick sale adjustment. This applies when you buy and then sell shares in the same FIF during the same tax year and make a gain on those transactions.
The quick sale adjustment is the lesser of two amounts: the actual gain on shares bought and sold within the year, or 5% × (maximum shares held during the year − opening shares held) × average cost per share.
If you only added to your position (bought but didn't sell) during the year, the quick sale adjustment is zero. It only matters if you actively traded in and out of the same holding within a single tax year.
Sam holds VOO (S&P 500 ETF) directly on Hatch. On 1 April, his holding was worth NZD $80,000. The portfolio grew 18% to $94,400 by 31 March. He received $1,200 in dividends.
By using FDR in a strong year, Sam pays tax on $4,000 of deemed income rather than his actual $15,600 gain. The $14,400 of returns above 5% are effectively tax-free under FDR.
Emma holds international ETFs directly. Opening value: NZD $70,000. Closing value: $71,000 (barely moved). She received $500 in dividends and paid $200 in brokerage costs.
In a flat year, CV saves Emma $660 compared to FDR. The takeaway: always calculate both. The best method changes year to year depending on market performance.
In March 2025, the government announced a new FIF calculation method called the Revenue Account Method (RAM), enacted in March 2026.
RAM is only available to people who became NZ tax resident on or after 1 April 2024, or who returned to NZ after being non-resident for at least five years. Budget 2026 (May 2026) proposed extending RAM to all NZ tax residents — subject to legislation, which is expected in August/September 2026.
The RAM works differently from FDR and CV: it only taxes realised gains, not unrealised gains. Under RAM: dividends are taxed in full when received; 70% of any realised capital gain is included as income when you sell; 70% of any realised capital loss can offset RAM income; and unrealised gains while you're still holding are not taxed at all.
For eligible investors, this is generally a significantly more favourable treatment than FDR or CV, particularly for growth-oriented portfolios where gains are mostly unrealised.
Check your total cost basis of overseas investments as at any day during the year. If it exceeded $50,000 at any point, FIF applies. Exclude NZ PIE funds, qualifying ASX shares, and KiwiSaver.
You need: opening market value (1 April) in NZD, closing market value (31 March) in NZD, dividends received in NZD, sale proceeds and purchase costs if applicable. Convert foreign currency using IRD-accepted rates.
Run both calculations. Use the calculator on this site or IRD's own tool. You must apply the same method to all your FIF holdings for the year.
FIF income is declared in your personal income tax return (IR3). Log in to myIR and enter your FIF income in the Foreign income section.
The standard filing deadline for individuals is 7 July. If you use a tax agent, you may have an extension. IRD receives overseas financial account data automatically through the Common Reporting Standard — undeclared FIF income attracts penalties and use-of-money interest.
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