Subdividing and selling a section: bright-line and land tax rules

When you subdivide land and sell a section, the bright-line clock does not restart when the new title is issued. The section keeps the bright-line start date of the original, undivided land, usually the day that land was first registered to you. So if you have owned the land for more than 2 years, a section sale is outside the bright-line test. That is not the end of the question. Subdivision is one of the situations where other land sale rules often apply instead: the intention test, and rules that tax development or subdivision work begun within 10 years of buying the land.

The short answer

This guide is general information, not tax advice. Subdivision tax depends heavily on the facts, so check with your accountant for your situation before you commit to the work. Rules checked 10 November 2026 against Inland Revenue's IR1229 Bright-line property tax (March 2026), QB 25/08 and the Income Tax Act 2007.

Three rules can tax the sale of a subdivided section, and they are checked in this order:

The bright-line test only applies if none of the other land sale rules apply first (QB 25/08 para 18). Our is my gain taxable checker walks through them in the same order.

How start dates work for subdivided land

IR1229 (p9) says: "When land is subdivided, the start date for the bright-line period is the date the legal title for the undivided land was originally registered to the owner under the Land Transfer Act 2017." Inland Revenue's statement QB 25/12 (9 May 2025) says the same for a section sold within 2 years.

IRD's Bob example. The title to Bob's residential land is registered on 1 May 2021. On 1 May 2022 he subdivides into 2 sections and builds a house on the second. On 1 May 2025 he agrees to sell the second section to Carl. The start date is 1 May 2021, so the sale is not within 2 years and the bright-line test does not apply. But IRD adds that Bob "may still need to consider whether any of the other land taxing rules apply".

A section sold within 2 years of the original registration can be caught even if it is bare land: residential land includes land you can build a house on under the district plan (IR1229 p6).

Co-owners who split the land: partitions

When co-owners subdivide and each takes a lot, that is a partition. The start date is generally still the date the undivided land was registered to the co-owners, as long as the value of the land you receive, as a share of all the land, is no more than 105% of your share of the total cost (including subdivision, development and building costs). If it is more, the extra part ("additional land") starts on the date of the partition (IR1229 pp9 to 11).

In IRD's Everly and Daniel example, each pays half of $2 million in land and building costs, but Daniel's finished lot is worth $1.5 million of the $2.5 million total: 60%, above 105% of his 50% cost share (52.5%). So (60% less 50%) divided by 60%, or 16.67% of his lot, starts on the partition date, 15 June 2026. The other 83.33% keeps the original 5 February 2025 date. Everly's 40% is below the limit, so all of her lot keeps the original date.

The partition itself is a disposal, but exempt if the value you receive is 95% or more of your cost share (IR1229 p40).

Worked example: selling the back section

Say you buy a house on a large section as a rental, and the title is registered to you on 1 March 2025 for $900,000. In 2026 you subdivide off the back of the section, spending $90,000 on surveying, consents and services, and the new titles are issued. You sign to sell the bare back section on 1 February 2027 for $520,000, settling on 15 March 2027, with $12,000 of agent and legal fees. You earn $80,000 a year.

You need a cost for the section. The original $900,000 bought the whole property, so part of it has to be allocated to the section. Here we assume $300,000, a third of the price. How to split the cost on your own property is something to settle with your accountant, often on relative values.

See how the gain is taxed and deductible costs.

Signing two months later

If you signed the same sale on 1 April 2027 instead, it would be after the anniversary of 1 March 2027, so the bright-line test would not apply. But because this was a rental, not your home, the section could still be taxed under the scheme rule in section CB 12 if the $90,000 of work is "not minor" and no exclusion applies. That rule has a 10-year window, explained below. Whether work is minor depends on the facts, which is why advice before you subdivide is worth having. Our bright-line end date calculator gives the anniversary for any start date.

Subdividing your own home

If the land was your main home, the main home exclusion can cover a subdivided section, even one with no house on it. QB 25/12 says the exclusion applies when the land in the section has been used predominantly for your main home (usually more than 50% of it) for more than 50% of the bright-line period. Your use before and after the subdivision both count, and land you use frequently in connection with the house, such as a yard or garden, counts as main home use.

IRD's Ling example (IR1229 p24). Ling buys a home, subdivides after 2 months and sells off the back of the section, which he keeps using as his backyard until it sells 12 months later. The exclusion applies, because the backyard was part of his main home for more than half the period. In the fact variation, Ling builds a new house on the back section 2 months after buying, so that land was his main home for only 2 of the 14 months, and the exclusion does not apply.

Our main home test calculator runs the area and time tests, and the main home exclusion guide covers the limits, such as having used the exclusion twice in the previous 2 years.

There is a matching exclusion from the scheme rules. Section CB 17 says sections CB 12 and CB 13 do not apply to a lot that came out of land you divided if the land was 4,500 square metres or less before division and was occupied mainly as residential land for you and family living with you. It also excludes work done so you and your family can live on the land.

When the intention test or developer rules apply instead

The intention test

If you bought the land intending to sell some or all of it, the intention test (s CB 6) taxes the sale whenever it happens, with no 2-year or 10-year safe harbour (QB 25/08 para 28). QB 25/08 covers subdivision directly:

• Dividing the land and selling it in pieces does not help: the sale of land acquired with that intention is taxed "no matter what you later do with the land or its boundaries" (para 30).
• If you bought intending to keep one lot and sell the rest, only the part you meant to sell is taxed, and you need good evidence of which part that was (para 32).

Where the intention test applies, it overrides the bright-line test. See our intention test guide.

Dealers, developers, dividers and builders

QB 25/08 (para 48) lists the other rules. A sale can be taxed if:

• you acquired the land for a business of dealing, developing, dividing into lots or building, yours or an associate's (s CB 7);
• you sell within 10 years of acquiring it and, when you acquired it, you or an associate were in the business of dealing, developing or dividing land (ss CB 9 and CB 10);
• you sell within 10 years of completing improvements, if you or an associate were in the business of building when they started (s CB 11);
• the land was part of an undertaking or scheme involving development or division into lots, as below (ss CB 12 and CB 13); or
• you sell within 10 years of acquiring it and 20% or more of the increase in value comes from factors such as a district plan change or a resource consent (s CB 14).

The scheme rules for one-off subdividers

Sections CB 12 and CB 13 reach people who are not in business. Under section CB 12, the sale is income if an undertaking or scheme, "not necessarily in the nature of a business", involves developing or dividing the land; you or someone for you carries out the work; the work "is not minor"; and the scheme began within 10 years of acquiring the land. Section CB 13 has no time limit but applies only to major projects with significant spending on works such as roading, drainage, earthworks or kerbing. Both are subject to exclusions, including the residential exclusion in section CB 17 described above.

Farmland

Farmland is excluded from the bright-line test, but a subdivided block is tested on its own. In IRD's Jean and Robin example (IR1229 p26), 2 hectares fenced off from a dairy farm for a family home is no longer farmed, so it becomes residential land and the bright-line test needs to be considered if it is sold.

IR1229 is not written for people in the business of dealing, developing or building, so if you subdivide more than once, get advice early.

Questions people ask

Does the bright-line period restart when a new title is issued after subdivision?

No. IR1229 says the start date for a subdivided section is the date the undivided land was originally registered to you. IRD's Bob example shows a section sold more than 2 years after the original registration falling outside the test.

Can the main home exclusion apply to a bare section I subdivided from my home?

Yes. QB 25/12 says it can apply even with no house on the section, if the land was used predominantly as your main home, for example as your backyard, for more than 50% of the bright-line period.

I have owned my land for over 2 years. Is a section sale tax-free?

Not necessarily. The bright-line test will not apply, but the intention test has no time limit, and section CB 12 can tax a scheme with work that is not minor begun within 10 years, unless an exclusion applies.

How is the start date set when co-owners partition land?

Generally the original registration date, unless the value of the lot you receive, as a share of the total, is more than 105% of your share of the cost. Then the extra part starts on the partition date.