BRIGHT-LINE TEST NZ: WHAT IS IT AND HOW IT WORKS TODAY

The bright-line test NZ property owners deal with has changed four times since it began in 2015. That history creates real confusion. Plenty of investors still believe they’re locked into a 5-year or 10-year rule that hasn’t applied to their sale for years. This guide sets out how the test works today, the history behind it, and the detail that trips up more sellers than anything else: which date actually decides which rule applies.

30-Second Read

• The bright-line test taxes profit on a residential property sale, if you sell within a set period of buying it.
• The current period is 2 years. It applies to every sale from 1 July 2024 onward, regardless of when you bought the property.
• What decides the rule is your sale date, not your purchase date. Selling today means the 2-year test applies, even if you bought under an older 5-year or 10-year regime.
• The main home exemption can take a sale out of the bright-line test entirely. The test itself differs depending on whether you bought before or after 27 March 2021.
• Rollover relief, inherited property, and relationship property settlements all get separate treatment.

We work through the current rule, the full history, the exemptions, two worked examples, and a checklist to run through before you sell.

What Is the Bright-Line Test?

The bright-line test taxes profit on a residential property sale, if you sell within a defined period of buying it. New Zealand doesn’t have a general capital gains tax. But the bright-line test functions like one, for short-term property sales. Sell within the period, and IRD treats the profit as income, taxed at your marginal rate. Sell outside it, and the bright-line rules don’t apply. Other provisions can still catch a sale, though — like the intention test for property bought to resell.

The clock generally starts at settlement, when title transfers to you. It ends on the date you enter a binding sale and purchase agreement — not the settlement date of the sale itself.

How the Rule Changed Over Time

The bright-line test began on 1 October 2015, with a 2-year period. It then extended twice:

• 1 October 2015 – 28 March 2018: 2-year period
• 29 March 2018 – 26 March 2021: 5-year period
• 27 March 2021 – 30 June 2024: 10-year period (5 years for new builds)
• From 1 July 2024: 2-year period, for every sale, regardless of purchase date

This history explains why so much advice online still describes a 5-year or 10-year test. That advice was correct once. It just no longer applies to a sale happening today.

The Current Rule: What Actually Decides Which Period Applies

Here’s the detail that catches people out. Your sale date decides which bright-line rule applies — not your purchase date.

Since 1 July 2024, every sale falls under the 2-year test, no matter when the property was bought. Bought in 2016? 2019? 2022? It doesn’t matter. Selling today means only the time between your purchase and your sale counts, measured against the current 2-year window.

The older 5-year and 10-year periods only ever applied to sales completed before 1 July 2024. For anyone selling now, they’re history, not a live consideration — regardless of which regime applied when you originally bought.

Worked Examples

Let’s look at some typical examples:

Aroha bought a rental in June 2022, under the 10-year rule. At the time, Aroha expected her property to stay inside the bright-line test until June 2032. She sells in February 2025, just under three years after buying. Her sale falls after 1 July 2024, so the current 2-year rule applies — not the 10-year rule that applied when she bought. She’s held the property well beyond 2 years, so the bright-line test doesn’t catch her sale at all. (Phew!) That’s eight years earlier than she originally expected.

Johnny bought his home in January 2024 and sells in August 2025. Mark’s purchase happened under the old 10-year regime. His sale, though, happens after 1 July 2024, so the 2-year test applies. Mark held the property for roughly 19 months — inside the 2-year window. (Doh!) His sale is taxable under the bright-line test, unless an exemption applies.

The Main Home Exemption

A genuine main home can be exempt(opens in new tab) from the bright-line test. The test itself differs depending on when you bought, though.

Bought before 27 March 2021: an all-or-nothing test. Used the property as your main home for the majority of your ownership period? You get full relief. If not, no relief at all.

Bought on or after 27 March 2021: a proportionate test instead. The exemption applies only for the actual period the property served as your main home. Vacancy, or using it for something else along the way, can dilute the exemption rather than eliminate it entirely.

Other Exemptions and Rollover Relief

A handful of other situations sit outside the bright-line test, or qualify for special treatment:

• Inherited property generally falls outside the bright-line test for the person who inherits it.
• Relationship property settlements typically don’t trigger a bright-line sale.
• Rollover relief can apply to certain transfers between associated persons, including some trust transfers. The new owner inherits the original bright-line start date, rather than resetting the clock. This is a technical area. Check with your accountant before any transfer, since getting it wrong can trigger tax you didn’t expect.

New Builds: A Narrower Rule That’s Now Moot

Between 27 March 2021 and 30 June 2024, new builds got a shorter 5-year bright-line period instead of the standard 10 years. Since 1 July 2024, every property — new build or not — falls under the same 2-year rule for any sale happening now. The new-build distinction still matters for historical sales completed before that date. It no longer changes anything for a sale today, though.

Bright-Line and Ownership Structure Changes

Selling isn’t the only thing that can trigger the bright-line test. Changing shareholding in an LTC that owns residential property can also start a fresh bright-line clock, for the portion that changes hands. The same goes for transferring an interest between associated persons in other ways. We cover this in detail in Changing Shares in LTCs: Considerations — worth reading before you restructure any ownership interest, not just before an outright sale.

Checklist Before You Sell

• ✅ Confirm your sale date, not your purchase date, to work out which bright-line rule applies
• ✅ If selling after 1 July 2024, apply the 2-year rule regardless of when you bought
• ✅ Check whether the main home exemption applies, and which version — proportionate or all-or-nothing — fits your purchase date
• ✅ Confirm whether the property was inherited, or involves a relationship property settlement
• ✅ Check whether rollover relief applies if you’re transferring rather than selling outright
• ✅ Get advice before changing LTC shareholding or any other ownership interest in a residential property

Common Questions

I bought my property under the old 10-year rule. Does that rule still apply to me? Only if you sold before 1 July 2024. Selling today, or any time from 1 July 2024 onward, the current 2-year rule applies, regardless of when you bought.

How is the bright-line period actually measured? Generally from your settlement date (when title transferred to you) to the date you enter a binding sale and purchase agreement to sell. Not the sale’s settlement date.

Does the bright-line test apply to my main home? Usually not, if it’s a genuine main home; that’s when you can probably use the main home exemption. The exact test depends on whether you bought before or after 27 March 2021.

What happens if I inherited the property? Inherited property generally sits outside the bright-line test for the person who inherits it.

Does changing my LTC’s shareholding trigger the bright-line test? It can, for the portion of ownership that changes hands. See our article on changing LTC shares for the detail.

Summary

The bright-line test NZ property sellers face today is simpler than its history suggests: a flat 2-year period, applying to every sale from 1 July 2024 onward, regardless of when the property was bought. The 5-year and 10-year periods from earlier years only matter for sales completed before that date. For anyone selling now, only the sale date and the 2-year window matter. Exemptions for a genuine main home, inherited property, and relationship property settlements can still take a sale out of the test entirely, and rollover relief can apply to certain transfers. Get the sale date and the exemption right, and the bright-line test is usually straightforward. Get either wrong, and it can mean an unexpected tax bill.

Talk to EpsomTax.com Before You Sell

Bright-line mistakes are expensive, and they’re avoidable — a wrong assumption about which rule applies, or a missed exemption, can turn a tax-free sale into a taxable one.

Contact EpsomTax.com before you sell, or before you change ownership of a residential property in any other way. We work with New Zealand property investors every day, and we can confirm exactly where your sale sits against the current rules before you sign anything.