Bright-Line Test 2026: What Property Sellers Must Know

What the bright-line test is

The bright-line test is an income-tax rule: sell a residential property within the bright-line period and any gain is taxable at your marginal rate, regardless of your intention when buying. It exists to tax short-term property flipping without arguing about intent.

The current rule (from 1 July 2024)

The simplification matters: the previous regime's 10-year window and separate new-build treatment are gone for sales from July 2024 onward. What counts is your sale date and how long you've held.

Key dates: when the clock starts and stops

• Start: generally the date the property's title transfers to you (settlement), not the agreement date.
• Stop: generally the date you enter a binding sale and purchase agreement to sell — not your settlement date as seller.
• Off-the-plan purchases have their own timing rules; get specific advice.

The main home exclusion

Your main home — the property you use predominantly as your residence — is generally excluded from bright-line. Traps exist: extended periods away, large-scale renting of the property, holding through a trust, or a pattern of buying and selling homes can all compromise the exclusion. If your situation is anything but vanilla, this is accountant territory.

What sellers should actually do

1. Check your purchase settlement date before listing — being weeks early on a two-year window can create a five-figure tax bill.
2. If a taxable sale is unavoidable, budget for tax at your marginal rate on the gain and file it in your return.
3. Structure refinances and top-ups with the tax picture in mind — lending and tax strategy interact for investors.
4. Talk to your accountant before signing anything. This article is general information only, not tax advice.

Frequently asked questions

How long is the bright-line test in NZ now?

Two years, for residential property sold on or after 1 July 2024. Sales before that date fall under the older 5/10-year rules based on when the property was bought.

Does the bright-line test apply to my family home?

Generally no — the main home exclusion covers the property you predominantly live in. Trusts, long absences and repeated buying/selling patterns can complicate it.

When does the bright-line clock start?

Usually at settlement (title transfer) when you buy, and it stops when you sign a binding agreement to sell. The gap between agreement and settlement dates catches people out.

Is bright-line tax a separate 'capital gains tax'?

No — a taxable bright-line gain is treated as income and taxed at your marginal income-tax rate through your normal return.