FIF Tax NZ: FDR vs CV Method — Which Calculation Saves You More?

New Zealand’s Foreign Investment Fund (FIF) rules apply to most offshore investments — US shares, Australian ETFs, UK funds, and certain foreign superannuation schemes — where your total cost across all foreign investments exceeds NZ$50,000. Once you cross that de minimis threshold, you must calculate FIF income and include it in your IR3 tax return.

The method you choose to calculate that income — Fair Dividend Rate (FDR) or Comparative Value (CV) — can change your FIF income by tens of thousands of dollars in a single year. Understanding when each method applies, and how to switch between them, is essential for any NZ investor with an overseas portfolio.

Background: The $50,000 De Minimis Threshold

The FIF rules apply if the total cost of all your FIF interests exceeds NZ$50,000 at any point during the income year. Cost means what you paid — not current market value. So if you purchased US shares for NZ$48,000 that are now worth NZ$80,000, you are under the threshold and do not need to calculate FIF income.

If you are under $50,000, you are instead taxed on dividends received, plus any capital gains under ordinary tax principles (which for most individual investors who are not traders means capital gains are not taxed — but this is a facts-and-circumstances question, not a blanket exemption).

Important: The $50,000 threshold applies per person, not per account or per holding. All FIF interests across all brokers and accounts are aggregated. Married couples and de facto partners each get their own $50,000 threshold.

The Two Main Calculation Methods

Once over the threshold, individual investors holding shares or funds directly have two primary calculation options. A third, the deemed rate of return method (also known as the cost method), applies in limited circumstances and is not covered here.

Fair Dividend Rate (FDR)

FDR assumes your portfolio generates a return equal to 5% of its opening market value, regardless of how it actually performed. You pay tax on that 5% deemed return at your marginal tax rate.

Formula: FIF income = Opening market value × 5%

The opening market value is measured on 1 April (or the start of your income year if you use a non-standard balance date).

Quick sale adjustment: If you sell shares during the year and the sale proceeds (including any dividends on those shares) are less than the opening value plus 5%, the FDR income on those sold shares is capped at the actual gain. If the sale is at a loss, FDR income on those shares is nil. The quick sale adjustment applies share-by-share — you cannot offset quick-sale losses against unsold shares.

Example: On 1 April you hold US shares worth NZ$150,000. Under FDR, your FIF income for the year = $150,000 × 5% = $7,500. At a 33% marginal tax rate, you pay $2,475 in tax — even if the portfolio ends the year worth $130,000 (a $20,000 loss).

If, however, you sell one holding originally worth $30,000 for $28,000 during the year, the FDR income on that holding is capped at the actual gain of nil (there is a loss), so your total FDR income becomes $120,000 × 5% = $6,000 — still paying tax on a phantom gain, but slightly less.

Comparative Value (CV)

CV calculates your actual economic gain for the year: closing market value plus dividends received minus opening market value minus the cost of any purchases during the year.

Formula: FIF income = (Closing market value + total dividends received + value of any distributions) − (Opening market value + cost of purchases during the year)

The closing market value is measured on 31 March (or the end of your income year). Purchases add to the cost base; sales are netted out (the closing value reflects only what you still hold).

Example: Same $150,000 portfolio. By 31 March, the value rises to $160,000, with $3,000 in dividends received during the year. No purchases or sales.

CV income = ($160,000 + $3,000) − $150,000 = $13,000

Here, CV produces $13,000 in FIF income compared to FDR’s $7,500 — FDR is clearly the better choice.

When FDR Wins

FDR is advantageous when your portfolio returns more than 5% in the year. At a 20% return on $150,000, you have $30,000 in actual economic gain. Paying tax on 5% ($7,500) is a bargain — you are taxed on less than you actually earned.

FDR also wins when:

Your portfolio is relatively stable in value — small gains above 5% or small losses below 5% both favour FDR because the 5% cap is predictable and you avoid calculating actual performance across dozens of holdings
You make frequent purchases during the year, which complicate the CV calculation (each purchase increases the deduction under CV, but you need precise NZD cost records for every transaction)
You simply want simplicity — FDR is one calculation: opening value × 5%

When CV Wins

CV is dramatically better when your portfolio has lost value during the year. If your $150,000 portfolio falls to $120,000:

FDR: $150,000 × 5% = $7,500 FIF income (you pay tax despite losing $30,000)
CV: $120,000 − $150,000 = nil FIF income (a loss, so no FIF income to report)

CV also wins when:

Your portfolio return is below 5% but positive — if you earn 2%, CV taxes the actual 2% gain while FDR taxes 5%
You made significant additional investments during the year — those purchases increase the CV deduction (they are subtracted from the gain calculation)
You are a buy-and-hold investor who can track opening and closing values with minimal transaction complexity

Switching Between Methods

The general rule under the Income Tax Act 2007:

You choose the calculation method for each FIF interest each year
However, once you use the CV method for a particular FIF interest, you generally cannot switch back to FDR for that same interest in a subsequent year — unless:
- The FIF interest is a different class of share or unit
- There has been a material change in the nature of the interest
- You can demonstrate that the switch is not for tax avoidance purposes and the Commissioner allows it

Practical approach used by most investors and advisers:

Default to FDR — it is simpler, produces predictable results, and keeps the option to switch to CV open
Switch to CV in a down year — when the portfolio loses value, the one-way switch to CV is worthwhile because you lock in the ability to report actual (lower or nil) FIF income going forward
If you have already switched to CV and the market recovers: you are now locked into CV and will report actual gains, which in a strong year could be higher than 5%. This is the trade-off — the price of using CV in a down year is that in up years you report larger gains

Some investors choose to never use CV, treating FDR’s 5% as an acceptable cost of simplicity and predictability. At a 33% marginal rate on 5% FIF income, the effective tax drag is roughly 1.65% of portfolio value per year — comparable to the management fee on some managed funds. Other investors prefer to minimise tax each year and accept the CV lock-in risk.

Worked Example: Method Choice Across Market Conditions

An investor holds a US ETF portfolio with NZ$200,000 opening market value each year.

Year 1 — Strong Bull Market (up 20%)

Opening value: $200,000. Closing value: $238,000. Dividends: $2,000. Net gain: $40,000.

FDR: $200,000 × 5% = $10,000
CV: ($238,000 + $2,000) − $200,000 = $40,000

Verdict: FDR. Tax on $10,000 instead of $40,000. At 33%, saving = $9,900.

Year 2 — Flat Market (up 1%)

Opening value: $238,000. Closing value: $238,380. Dividends: $2,000. Net gain: $2,380.

FDR: $238,000 × 5% = $11,900
CV: ($238,380 + $2,000) − $238,000 = $2,380

Verdict: CV — if you are willing to make the one-way switch. FIF income drops from $11,900 to $2,380. Tax at 33% = $785 instead of $3,927. But you are now locked into CV.

Year 3 — Bear Market (down 15%)

Opening value: $238,380. Closing value: $202,623. Dividends: $2,000. Net loss: ~$33,757.

FDR: $238,380 × 5% = $11,919 (tax on $11,919 despite losing $33k!)
CV: ($202,623 + $2,000) − $238,380 = −$33,757 = nil FIF income

Verdict: CV is the clear winner here. If you are still on FDR, this is the year to switch. If you already switched to CV in Year 2, you are now reporting nil FIF income while FDR users are paying tax on $11,919 of phantom income.

Year 4 — Recovery (up 18%)

Opening value: $202,623. Closing value: $237,095. Dividends: $2,000. Net gain: $36,472.

FDR (if still on FDR): $202,623 × 5% = $10,131
CV (if locked in): ($237,095 + $2,000) − $202,623 = $36,472

Verdict: FDR users come out ahead. CV-locked investors report $36,472 — more than 3.5× the FDR amount. This is the CV lock-in trade-off materialising.

Over the four years combined:

Method	Year 1	Year 2	Year 3	Year 4	Total FIF Income
FDR only	$10,000	$11,900	$11,919	$10,131	$43,950
FDR → CV switch in Year 2	$10,000	$2,380	$0	$36,472	$48,852
FDR → CV switch in Year 3	$10,000	$11,900	$0	$36,472	$58,372

The pure-FDR approach produces the lowest total FIF income over this particular cycle — but that is path-dependent. In a prolonged bear market (e.g., 2–3 consecutive down years), switching to CV would produce better outcomes. There is no universal right answer; the decision depends on your market outlook, holding period, and tolerance for complexity.

The Quick Sale Adjustment in Detail

The quick sale adjustment is an FDR refinement that is often overlooked. To calculate it for a sold holding:

Calculate FDR on the sold shares: Opening value × (days held / 365) × 5%
Calculate the actual gain (or loss) on the sold shares: Sale proceeds + dividends received − opening value
Your FIF income for those shares is the lesser of (1) and (2). If (2) is negative (a loss), FIF income on those shares is nil.

The quick sale adjustment only applies to shares sold during the year. Shares still held at year-end are always subject to the full 5% FDR.

Some investors engage in tactical selling before 31 March to reduce FIF income: sell holdings that are underwater (or up less than 5%) to cap FDR income at the actual gain, then repurchase after 1 April. This must be a genuine sale at market value — a sham sale designed purely for tax avoidance may be challenged by IRD under the general anti-avoidance rule (GAAR).

Record-Keeping Requirements

Whichever method you use, keep these records for at least seven years:

Opening market value as at 1 April (or income year start)
Closing market value as at 31 March (or income year end)
All purchase and sale transaction records, including dates and NZD-equivalent amounts
Dividends received, translated to NZD at the payment date exchange rate
Exchange rates used — the IRD publishes monthly rates in the Exchange Rates section of their website, or you can use a consistent commercial source (Xe, OANDA)
Any corporate actions (stock splits, mergers, spin-offs) that affected your holdings during the year
Quick sale adjustment calculations, if any

For US-listed shares, multi-currency platforms like Hatch and Sharesies now provide annual FIF reports with pre-calculated FDR and CV amounts — but these typically use platform-level exchange rates, which may differ from IRD-published rates. You are responsible for the final numbers on your return, not the platform.

FIF Income and the Rest of Your Tax Picture

FIF income affects more than just your income tax:

Working for Families: FIF income is included in family scheme income. A $20,000 FIF income could reduce or eliminate your WfF entitlement.
Student loan repayments: FIF income counts toward repayment income, increasing your repayment obligation.
Provisional tax: If your FIF income is large enough to push your residual income tax above $5,000, you will have provisional tax obligations in the following year.
ACC earner levy: FIF income is NOT subject to ACC earner levies — those apply only to employment and self-employment income, not investment income.

FIF Through a PIE

If you hold foreign investments through a Portfolio Investment Entity (PIE) — including most NZ-domiciled managed funds, KiwiSaver funds, and some ETF wrappers — the PIE calculates FIF income at the fund level and flows through to you as part of your PIE income. You do not separately calculate FIF on PIE-held investments.

Some investors intentionally keep their directly-held foreign portfolio below $50,000 and invest the balance through PIE funds to avoid the FIF calculation burden. The trade-off is fund management fees versus the tax and compliance cost of direct holding.

Use our FIF Tax Calculator to run FDR and CV on your portfolio before finalising your filing position.