Ring-fencing means a loss on your residential rental cannot reduce the tax on your salary. How the rules work, and what happens to the loss.
Ring-fencing is a New Zealand tax rule that prevents losses from residential rental property being offset against other income such as salary, wages or business income. The loss is carried forward and can only be used against future residential rental income or a taxable property sale.
Before the 2019–20 income year, a loss-making rental could reduce the tax on your day job. That is no longer the case. For leveraged investors, this is often a bigger constraint than the interest rules — you get the deduction, but you may not be able to use it this year.
Rental income $26,400. Expenses $9,000. Interest $20,000.
Total deductions of $29,000 exceed income by $2,600. That $2,600 loss is ring-fenced — it does not reduce the tax on a $70,000 salary. It carries forward to offset future rental income, or a future taxable sale.
Ring-fencing generally applies across your residential portfolio rather than property by property, so a loss on one property can offset profit on another. It bites when the combined residential rental activity shows a net loss.
New builds are treated differently — losses from new builds are generally not ring-fenced.
Ring-fenced losses aren't lost, they're deferred. They accumulate and are often released all at once when a sale triggers the bright-line test, offsetting the taxable gain. Investors sometimes forget they have a stockpile.
Last reviewed: 1 August 2026 · General information only, not tax advice.
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