A Moneybren tool

NZ RENTAL YIELD CALCULATOR

Gross yield is the number in the listing. Net yield and weekly after-tax cashflow are the numbers that decide whether a New Zealand rental makes or costs you money — here are all three.

Your numbers

$
$/wk
wks
$/yr
$/yr
$/yr
Rule of thumb: 0.5–1% of the property value per year, more for older homes.
% of rent
Set to 0 if self-managing — then your time is the cost.
$/yr
$
% pa
Interest-only assumed — how most investors hold, and the honest cashflow view.
This property
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The annual ledger

The fine print, honestly. Yields here are what the numbers say, not what the listing says — gross yield flatters, net yield after real costs is the honest one. Interest is fully deductible again for residential rentals, but rental losses are ring-fenced: a loss reduces future rental income, not your salary tax — negative gearing doesn’t hand you a refund in New Zealand. Not modelled: capital growth (the reason most people actually buy), the bright-line test (2 years) if you sell early, accounting fees, healthy homes upgrades, or the tenant from hell. A property that costs you money weekly is a bet on capital growth — make that bet knowingly.

How to use this calculator

Enter the price, rent, running costs and mortgage. The calculator gives gross yield, net yield, and the weekly after-tax cashflow — the number that actually hits your account.

Stress-test it: add two more vacant weeks, bump the rate 1%, and see if the property still survives. If it only works in the sunny scenario, it doesn’t work.

This is a tool only, and none of the information it produces is financial advice. Its accuracy is not guaranteed. Always check your own figures and get advice from your own financial professionals before making decisions.

A worked example

Say you buy a rental for $700,000 and it brings in $650 a week – that’s $33,800 a year.

Divide the rent by the price and your gross yield is about 4.8%. Looks decent. But gross yield is the flattering number. Now strip out the costs of actually owning the thing: rates, insurance, maintenance, and property management. Suddenly your net yield – the number that matters – is closer to 2.5-3%.

The calculator does both, so you see the headline figure and the real one. Put your purchase price and rent in above.

What most people get wrong about rental yield

Everyone quotes gross yield because it looks good in a listing. Net yield is what actually lands in your pocket, and in New Zealand it’s often thin – low single digits once every cost is accounted for.

That’s the quiet truth about NZ rental property: for years the game hasn’t really been the rental income at all. It’s been the capital gain – betting the property is worth more later. That can work, but it’s a very different bet from “this asset pays me a solid income,” and it’s worth being honest with yourself about which one you’re actually making.

One more thing the yield number hides: your mortgage. Yield is calculated on the property’s price, not on the borrowed money, so a place with a “fine” yield can still bleed cash every week once the loan repayments are in. Do the full sums – rent minus every cost minus the mortgage – before you call it an investment.

This calculator and page are general information only and not financial advice. Everyone’s circumstances will vary – always do your own research and consult your own financial professionals before making decisions.