What is the NZ bright-line test?

The bright-line test is New Zealand's property tax rule that taxes gains on residential property sold within a certain period of purchase. It is not a formal capital gains tax but operates similarly. From July 2024, the period is 2 years for all properties. Before that, the period was 5 years (from 2018) or 10 years (from 2021) for most existing homes. The gain is taxed at your marginal income tax rate.

Is my main home exempt from the NZ bright-line test?

Yes — your main home (primary residence) is generally exempt from the bright-line test. However, if you also rented part of the property (e.g., flatmates or Airbnb), the proportion used for income purposes is not exempt. IRD applies time or area apportionment. Inherited property and relationship property settlements are also exempt.

How is the bright-line test calculated?

The taxable gain is your sale price minus your purchase price, minus allowable deductions (purchase costs such as legal fees and LIM, capital improvements, and selling costs like agent commission). The net gain is then taxed at your marginal income tax rate — 10.5%, 17.5%, 30%, 33% or 39% depending on your total income including the gain.

Which bright-line rule applies to my property?

The rule depends on when you purchased the property, not when you sell. Pre-March 2018: 2-year test. March 2018 to March 2021: 5-year test. March 2021 to July 2024: 10-year test for existing homes (5 years for new builds). From July 2024: 2-year test for all properties. Enter your purchase date in the calculator to see which rule applies.

What costs can I deduct from the bright-line gain?

You can deduct: (1) purchase costs such as legal fees, valuation, LIM report and building inspection; (2) capital improvements to the property (extensions, renovations — not maintenance or repairs); and (3) selling costs including real estate agent commission, marketing and legal fees at sale. These deductions reduce your taxable gain. Keep documentation for all costs.

NZ Bright-Line Test Calculator

Calculate whether your NZ property sale is subject to the bright-line test and estimate your income tax liability on any gain. Covers the 2-year rule (from July 2024), earlier 5-year and 10-year rules, main home exemption, and deductible costs. All figures in NZD.

Purchase Date

Expected Sale Date

Purchase Price

Expected Sale Price

Property Type

Your Marginal Tax Rate

Bright-Line Period

2 years

From July 2024: 2-year bright-line test (all properties)

Hold Period

1.0 years

12 months from purchase to sale

Bright-Line Status

Within period — TAX APPLIES

Sale before 2027-05-14

Estimated Tax

NZ$26,400

33.0% of NZ$80,000 taxable gain

Bright-line tax applies. Selling before 2027-05-14 means your gain of NZ$80,000 may be taxable at 33.0%. Estimated tax: NZ$26,400. Consult a tax advisor.

Advanced

Timeline, Exemptions, Deductible Costs

Which bright-line rule applies and what reduces your tax

The bright-line period has changed multiple times. The rule that applies depends on when you PURCHASED the property, not when you sell.

Purchase Date	Bright-Line Period	Notes
Before 29 March 2018	2 years	Original bright-line, only investment properties effectively caught
29 Mar 2018 — 26 Mar 2021	5 years	Extended to catch medium-term speculators; main home exempt
27 Mar 2021 — 30 Jun 2024	10 years (existing) / 5 years (new build)	Labour government extension; aimed at long-term investors
From 1 July 2024	2 years	National government reduction — back to 2-year test for all properties

Your property: Purchased 2025-05-14 — the 2-year bright-line applies. From July 2024: 2-year bright-line test (all properties)

Pro

Tax Calculation, Main Home Apportionment, Planning

Detailed bright-line tax analysis and legitimate planning strategies

Bright-line gains are added to your other income and taxed at your marginal rate. The gain itself does not get taxed at multiple brackets — your entire income determines which rate applies to the full gain.

Marginal Rate	Income Range	Tax on NZ$80,000 Gain
10.5%	income under $14,000	NZ$8,400
17.5%	income $14,001-$48,000	NZ$14,000
30.0%	income $48,001-$70,000	NZ$24,000
33.0% (your rate)	income $70,001-$180,000	NZ$26,400
39.0%	income over $180,000	NZ$31,200

How to Use This NZ Bright-Line Test Calculator

Enter your property purchase date, sale date (or planned sale date), purchase price, sale price, and any deductible costs (purchase costs, capital improvements, selling costs). The calculator determines which bright-line period applies based on your purchase date and estimates your tax liability at your marginal rate.

Which Bright-Line Period Applies?

Purchased before 1 October 2015: no bright-line test applies
Purchased 1 Oct 2015 – 28 Mar 2018: 2-year bright-line rule
Purchased 29 Mar 2018 – 26 Mar 2021: 5-year bright-line rule
Purchased 27 Mar 2021 – 30 Jun 2024: 10-year rule (5 years for new builds)
Purchased from 1 July 2024: 2-year bright-line rule for all properties

The main home exemption applies if the property was your principal residence for the majority of the ownership period. Partial exemptions apply if you also rented part of the property or it was only your main home for part of the time.

The Formula

Taxable Gain = Sale Price − Purchase Price − Allowable Deductions

Allowable Deductions:
+ Purchase costs (legal fees, valuation, LIM, building inspection)
+ Capital improvements (renovations, extensions — not maintenance)
+ Selling costs (agent commission, legal fees, marketing)

Tax = Taxable Gain × Marginal Income Tax Rate

NZ Marginal Rates (2025):
Up to $14,000 → 10.5%
$14,001–$48,000 → 17.5%
$48,001–$70,000 → 30%
$70,001–$180,000 → 33%
Over $180,000 → 39%

The bright-line gain is added to your other income for the year, which may push you into a higher marginal tax bracket for the entire gain amount. Spreading the sale across tax years is not possible — the full gain is attributed to the tax year in which settlement occurs.

Example

Rachel Selling an Investment Property in Christchurch

Rachel purchased a rental property in Christchurch in April 2022 for $620,000. She sells in October 2024 for $740,000. The 10-year rule applies (purchased before July 2024). She has $15,000 in allowable deductions.

Purchase Date	April 2022
Sale Date	October 2024
Bright-Line Rule Applied	10-year rule
Time Held	2.5 years — within 10 years, taxable
Sale Price	$740,000
Purchase Price	$620,000
Allowable Deductions	$15,000
Taxable Gain	$105,000
Marginal Rate (income $95K + gain)	33%
Estimated Tax Liability	~$34,650

Frequently Asked Questions

The bright-line test is New Zealand's property tax rule that taxes gains on residential property sold within a set period of purchase. It is not a formal capital gains tax but operates similarly. From 1 July 2024, the period is 2 years for all properties — returning to the original 2015 rule after previous governments expanded it to 5 years (2018) and 10 years (2021). The gain is taxed as ordinary income at your marginal income tax rate, not a special capital gains rate.

Yes, your main home (principal place of residence) is generally exempt. However, if you also rented part of the property — such as a flatmate, boarder, or Airbnb — the proportion used for income purposes is not exempt. IRD applies either time or area apportionment rules. Inherited property received as part of an estate and property transferred as part of a relationship property settlement under the Property (Relationships) Act are also fully exempt.

The taxable gain is your sale price minus your purchase price, minus allowable deductions. Allowable deductions include purchase costs (legal fees, valuation, LIM, and building inspection paid at purchase), capital improvements (extensions and renovations — not maintenance or repairs), and selling costs (real estate agent commission, marketing, and legal fees paid at sale). The net gain is then taxed at your marginal income tax rate — added on top of your other income for the year.

The rule that applies depends on when you purchased the property, not when you sell. Properties purchased before 1 October 2015 have no bright-line test. Properties purchased between October 2015 and March 2018 have the 2-year rule. March 2018 to March 2021 have the 5-year rule. March 2021 to June 2024 have the 10-year rule (5 years for new builds purchased in this period). Properties purchased from 1 July 2024 onwards have the 2-year rule.

You can deduct three categories of costs: purchase costs including legal fees, valuation fee, LIM report and building inspection paid at the time of purchase; capital improvements to the property during ownership such as extensions and renovations (not maintenance or repairs); and selling costs including real estate agent commission, marketing expenses and legal fees paid at sale. Keep documentation for all costs as IRD may require evidence. Mortgage interest is generally not deductible against bright-line gains.