NZ Rental Income Tax Calculator
Calculate tax on your residential rental property income with ring-fencing, itemized deductions, interest deductibility, and rental yield.
Mortgage interest deductibility for 2025-26: 100%
Ring-fenced rental losses from previous years that can offset this year's rental profit.
Rental Income Tax in New Zealand
Rental income in New Zealand is taxed at your marginal income tax rate. Your rental income is added to your other income, and the incremental tax is what you owe on your rental profits.
Key deductions include operating expenses (rates, insurance, repairs, property management) and mortgage interest. Interest deductibility was reduced for residential property from 2021 but has been fully restored to 100% from 2025-26 (80% for 2024-25). New builds with a Code Compliance Certificate issued after 27 March 2020 are exempt from the limitation.
Since the 2019-20 tax year, residential rental losses are ring-fenced — they cannot offset your other income (salary, business income, etc.). Losses carry forward to reduce future rental income only.
Depreciation is not allowed on residential rental buildings in New Zealand (removed in 2011).
Frequently asked questions
What is ring-fencing of rental losses?
Since the 2019-20 tax year, residential rental deductions that exceed rental income cannot be used to offset your other income (e.g. salary or business income). Instead, the loss is carried forward and can only be offset against future residential rental income. This applies to all residential rental properties.
Can I deduct mortgage interest on my rental property?
Yes. From the 2025-26 tax year, 100% of mortgage interest on residential rental properties is deductible. For 2024-25, 80% is deductible. New builds (Code Compliance Certificate issued after 27 March 2020) get 100% deductibility regardless of tax year.
What expenses can I claim on rental income?
Allowable deductions include council rates, landlord insurance, property management fees, repairs and maintenance, body corporate fees, advertising for tenants, and mortgage interest (subject to deductibility rules). You cannot claim depreciation on residential buildings.
What qualifies as a 'new build' for interest deduction purposes?
A property is a new build if its Code Compliance Certificate (CCC) was issued on or after 27 March 2020, or if it was acquired from a developer who received the CCC on or after that date. New builds receive 100% interest deductibility regardless of the tax year.
How do I calculate rental yield?
Gross rental yield is annual rent divided by property value (e.g. $30,000 rent ÷ $750,000 value = 4%). Net rental yield subtracts expenses from the rent first. Enter your property value in the calculator to see both figures.
How are carried-forward rental losses applied?
Ring-fenced losses from prior years are applied against your net rental income in the current year. If your current year rental income is $15,000 and you have $10,000 in carried-forward losses, only $5,000 is taxable. Any unused losses continue to carry forward.
Sources
Ring-fencing rules from IRD — Residential Rental Income. Interest limitation rules from IRD — Interest Limitation. Tax rates from IRD.
Related Calculators
Last updated April 2026. Rates sourced from IRD.