You cannot claim depreciation on the building structure of a residential rental property in New Zealand. However, you may be able to claim depreciation on chattels such as appliances, carpets, curtains, heat pumps and furniture, depending on their value. A chattels valuation allows you to accurately calculate and claim depreciation over time.

The bright-line test is a tax rule that may apply when you sell a residential property within a specified period after purchasing it. If it applies, you may be required to pay income tax on any capital gain made from the sale. From 1 July 2024 onward, the bright-line test period has been reduced to 2 years for most residential properties. This means if you sell a property within 2 years of acquiring it, the profit may be taxable under the bright-line rules. Properties held longer than 2 years are generally not subject to bright-line tax, provided no other land tax rules apply. Understanding the bright-line test is important for property investors, as it can significantly impact your tax obligations when buying or selling investment property in New Zealand.

If your property is subject to the bright-line test, your taxable gain is calculated based on the difference between the sale price and the original purchase price, adjusted for certain allowable costs. These can include expenses such as legal fees, real estate agent commissions, and capital improvements made to the property over time. The basic formula is:
Sale price – Purchase price – Allowable costs = Bright-line gain
This resulting gain is then treated as taxable income and added to your total income for that financial year. The amount of tax payable depends on your marginal tax rate and overall income position.

One of the largest tax deductions available to property investors is mortgage interest (not the principal portion of loan repayments). From 1 April 2025, landlords can generally claim 100% of mortgage interest deductions on residential rental properties, regardless of when the property was purchased or when the loan was taken out. This change means interest costs on qualifying investment properties are fully deductible, helping to significantly reduce taxable rental income. These deductions apply only to the interest component of repayments and must relate directly to income-earning rental activity.

Under the current property investment tax rules, rental losses cannot be used to reduce other personal income. This means you cannot offset a rental loss against salary, wages, or other income sources. Instead, the loss is “ring-fenced” and kept separate from your other income. Rather than being lost, your rental loss is carried forward to future tax years. You can use these accumulated losses to offset future rental property income once your investment property becomes profitable.