Listing a spare room, or the whole place while you are away, looks like straightforward extra income. Four separate sets of rules disagree, and they do not talk to each other. Your tenancy agreement or title has something to say, your council has something to say, Inland Revenue has something to say, and if you are in an apartment the body corporate has something to say as well.
None of that makes it a bad idea. It makes it a thing to check before the first booking rather than after, because the consequences of getting it wrong range from a tax bill you did not expect to losing your tenancy.
If you rent, you need the landlord's written consent to sublet. Short-stay income is taxable from the first dollar. And once turnover from a taxable activity passes $60,000 in twelve months, GST registration becomes compulsory.
People plan for income tax and are blindsided by GST. Short-stay accommodation is a taxable activity, so the takings count towards the $60,000 registration threshold. Worse, registering can drag the property itself into the GST net, and there can be a GST cost when you later sell or stop the activity. That is the point at which a hobby becomes an expensive mistake, and it is the single best reason to take advice before scaling up.
A tenant cannot sublet without the landlord's consent. That covers subletting a room, taking in a flatmate where the agreement requires it, and listing the property on a short-stay platform. Doing it without consent is a breach of the tenancy, and it is one landlords take seriously because it affects their insurance and their own obligations.
Ask in writing and keep the reply. A landlord who consents to one thing has not consented to everything: permission to have a flatmate is not permission to run a short-stay business from the property.
Subletting creates a tenancy between you and the subtenant, with you as their landlord and all the obligations that carries, including lodging their bond. Taking in a flatmate does not. The distinction decides who can go to the Tenancy Tribunal and who is liable for what, and it is covered in boarding houses and renting a room.
District plans treat short-stay accommodation as a use of land, and uses of land are what district plans regulate. Some councils permit it outright, some permit it up to a number of nights a year, and some treat it as a commercial activity in a residential zone that needs resource consent.
There is often a rates dimension too. A property used substantially for short-stay accommodation may be rated differently from an owner-occupied home, and that reclassification can be worth more per year than a handful of bookings.
An apartment adds a further layer. Body corporate operational rules can restrict or prohibit short-stay letting, and those rules bind you as an owner. Some titles also carry covenants that limit the use of the property. Both are enforceable, and both are easier to read before you list than to argue about afterwards.
Insurance sits alongside this. A standard house or contents policy is written for a home, not for paying guests. Tell your insurer what you are doing and get the answer in writing.
Short-stay income is taxable. There is no equivalent of the boarder standard-cost method that quietly removes it, and the platform reports what it pays you.
Against that income you can deduct expenses relating to earning it. Where the property is used both privately and for guests, the expenses have to be apportioned, and there are specific mixed-use asset rules for properties that are used privately, used to earn income, and left empty for periods during the year. Those rules are more restrictive than ordinary rental apportionment and catch a lot of holiday homes.
The short-stay versus long-term rental calculator compares the two on a net basis rather than a headline nightly rate, which is where short-stay usually looks less dominant than it first appears once cleaning, vacancy and management are counted.
Supplying short-stay accommodation is a taxable activity for GST. Once your turnover from all taxable activities exceeds $60,000 in a twelve month period, or you expect it to, registration is compulsory.
Where a property is used in a GST-registered activity, GST consequences can follow on sale or when the activity stops. A house that was outside the GST system can be pulled into it, and the amount at stake is a percentage of a property value rather than of a year's rent. Anyone approaching the threshold should take advice before crossing it, not after.
The short-stay GST threshold calculator shows where your bookings sit against the threshold. Note that it is a rolling twelve month test rather than a tax year test, so a strong summer can trigger it mid-year.
The nightly rate is the most visible number and the least useful one. What decides the outcome is the net figure after everything that a long-term tenancy does not cost you.
| Cost | Why it bites |
|---|---|
| Occupancy | A high nightly rate at 45% occupancy can lose to a modest weekly rent at 100% |
| Cleaning and laundry | Per stay, not per month, so short stays cost proportionally more |
| Platform and payment fees | Taken off the top of every booking |
| Consumables and replacement | Linen, towels and furnishings wear far faster with turnover |
| Your time, or a manager's fee | Messaging, check-ins and problems are real work |
| Insurance and compliance | Specialist cover and any consent or rating change |
Run it properly with the nightly rate calculator to work out what rate you would actually need, then compare against a long-term tenancy on the same property.
Consent first, because if the landlord or body corporate says no, nothing else matters. Council second, because a resource consent requirement changes the economics completely. Insurance third. Then the numbers. Then list. Doing the numbers first is how people talk themselves into something they were never allowed to do.
Commercial accommodation businesses, motels and holiday parks operate under different rules. The bright-line test and other property tax rules can be affected by how a property is used, which is its own subject. Overseas hosts and non-resident owners have additional obligations. This is general information rather than tax or legal advice, and the GST position in particular is worth an accountant's time before you cross the threshold.
Ten questions on letting out space you already pay for.
Sources: Tenancy Services on subletting and assignment, Inland Revenue on short-stay accommodation, mixed-use asset rules and GST registration, and your local council's district plan. District plan rules and rating categories vary considerably by council and must be checked locally.
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