The bright-line rule, explained
It's one of the most misunderstood rules in New Zealand property — and one of the questions I get asked most. Here's what the bright-line test actually is, how the timeframes have changed, and when it does and doesn't apply to you.
What the rule actually does
New Zealand has never had a general capital gains tax, but profit on property bought with the intention of resale has always been taxable. The problem was proving intention. The bright-line test replaced that argument with a date: sell residential property inside the bright-line period and the gain is taxed as income, full stop — unless an exemption applies.
It applies to residential land. Your main home, farmland and business premises sit outside it, and there are specific carve-outs covered further down.
The timeframes, and which one applies to you
The rule that matters is the one in force on your sale date, not your purchase date.
Sold on or after 1 July 2024
A 2-year bright-line period applies, whenever you bought. This is the current rule and it caught a lot of people by surprise — some properties that were inside a 10-year window fell straight out of it.
Sold before 1 July 2024
The older settings apply: generally 5 years, or 10 years for existing homes bought between 27 March 2021 and 26 March 2024. New builds kept a 5-year period through that time.
How the clock is counted
It usually runs from the date the title transfers to you, through to the date you enter a binding sale agreement. That's an important asymmetry — the finish line is the signed contract, not settlement.
The exemptions worth knowing
- Main home. If the property was used predominantly as your main home for most of the time you owned it, the bright-line rule generally doesn't bite. Renting out part of it, or a long period away, can reduce the exclusion proportionally.
- Inherited property. Property you inherit is outside the rules, even if you sell it soon after.
- Relationship property transfers. Treated as a rollover: no bright-line sale, but the original acquisition date and cost carry across to the person receiving it.
- Rollover relief. Certain transfers — for example into some family trusts where the same people benefit — don't reset the clock or trigger tax.
This is general information, not tax advice. Bright-line outcomes turn on dates, ownership structure and how the property was used — always confirm your position with an accountant before you sell.
Where this touches your mortgage
Bright-line is a tax question, not a lending one — but it changes the arithmetic behind a plan. If you're buying a rental you might sell in eighteen months, the tax on the gain belongs in the numbers from day one. If you're moving out of your home and keeping it as a rental, the main home exclusion may not fully cover a later sale.
My job is to make sure the lending structure supports whatever plan you and your accountant land on: the right loan splits, the right fixed terms, and no cross-collateralisation locking you in when it's time to sell.
Common questions
What is the bright-line rule in New Zealand?
The bright-line rule is a tax test. If you sell residential property within a set period of buying it, any profit is taxable as income — unless an exemption applies. It isn't a separate capital gains tax; it's a clear line that removes the argument about whether you bought with the intention of resale.
How long is the bright-line period now?
Since 1 July 2024 the bright-line period is 2 years. Property sold on or after that date is tested against the 2-year rule, regardless of when it was bought. Sales before 1 July 2024 fall under the older rules — 5 years for most property (10 years for some purchases made between 27 March 2021 and 26 March 2024).
Does the bright-line rule apply to my family home?
Generally no. The main home exclusion covers a property you've used predominantly as your main home for most of the time you owned it. If part of it was rented, or you moved out for a long period, the exclusion can be reduced or lost — that's the point where an accountant should be involved.
What about inherited property or a relationship split?
Property received through an inheritance is outside the bright-line rules, and transfers under a relationship property agreement are generally rollover events rather than taxable sales. The clock and cost base carry over rather than resetting.
Does the bright-line rule affect my mortgage application?
Not directly — banks lend on the property and your ability to service the loan. It matters at the other end: if you may sell within two years, the tax on any gain changes the real numbers, and lenders will ask about your intentions if a short hold looks likely.