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Owning a rental or holiday home
Yield, interest deductibility, the bright line rules, and the tax on a bach that is let out some of the time.
24 situations worked through, 24 of them with the sums shown. Each one links to the guide that sets out the rules behind it, and that guide is where any rate or threshold is kept current.
The people in these situations are illustrations written to show how the rules land on somebody, not real customers and not case histories. The arithmetic is real and the rules are real; the names and the circumstances are made up to teach.
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Airbnb and Holiday Home Tax
The Wilsons: apportioning a Whangamata bach
The Wilsons rent their bach to holidaymakers for 40 days at market rate, earning $12,000. They use it privately for 30 days, and it sits empty for the remaining 295 days. Whole-property costs (rates, insurance, interest, upkeep) are $16,000, and rent-only costs (cleaning, platform fees) are $2,000.
- Private use: yes (30 days). Income-earning use: yes (40 days). Empty: 295 days, which is 62 or more
All three tests met, so the mixed-use rules apply
Rangi: the low-income opt-out
Rangi lists his South Island crib on Bookabach and rents it for just 12 days over summer, earning $3,200. He uses it himself for 25 days, and it is empty for 328 days.
- It is a mixed-use asset: private use, income use, and empty 62 or more days
- Gross income from renting: $3,200
- The opt-out applies when that income is under $4,000
$3,200 is under $4,000, so Rangi can leave the crib off his return entirely
By using the opt-out, Rangi declares no rental income and claims no expenses for the crib. It removes the paperwork when the letting is small. He owns it personally, so the opt-out is available. If a company owned the crib, it could not use the opt-out.
The Taylors: the GST-on-sale trap
The Taylors bought a bach for $650,000 and earn $35,000 a year from short stays, which is below the $60,000 GST threshold, so they do not have to register. A friend suggests registering to claim GST back on a $50,000 renovation.
- GST inside a $50,000 cost: $50,000 × 3 / 23 = $6,522
Registering could claim about $6,522 back on the renovation
As unregistered owners, the Taylors already receive the 8.5% flat-rate credit through the marketplace, which recognises the GST on their costs. Registering to grab a $6,522 renovation credit risks a GST bill of over $117,000 when they sell, unless a specific exception applies. For most owner-operated baches, staying unregistered is the safer position.
The Fishers: mostly private, with mates' rates
The Fishers use their bach themselves for 50 days. They also let it to extended family at a discounted $60 a night for 30 days, and to the public at the market rate of $220 a night for 25 days, earning $5,500. It is empty for 260 days. Whole-property costs are $18,000.
- Own private use: 50 days
- Family at mates' rates (below 80% of market): 30 days, counted as private use
- Public at market rate: 25 days, the only income-earning days
Private-use days: 50 + 30 = 80. Income-earning days: 25
If the Fishers had rented those 30 days to the public at market rate instead, the days would have been income-earning and their deductible share would have jumped. Because they gave family mates' rates below 80% of market, those days counted as private use, so their deduction stayed low. The rent they collected from family is not income-earning use.
Capital Gains Tax NZ
Property Investor Multiple Sales
Investor with 3 properties sold in one year
- Property A gain: $120,000 (taxable)
- Property B gain: $130,000 (taxable)
- Property C: $160,000 (tax-free, held >10 years)
- Total taxable: $250,000
- Tax at 39%: $97,500
Accidental Developer
Bought land, subdivided, sold sections
- Purchased large section: $800,000 (2021)
- Subdivision costs: $150,000
- Total cost: $950,000
- Sold 3 sections (2024):
- Section 1: $450,000
- Section 2: $480,000
- Section 3: $520,000
- Total: $1,450,000
Day Trader vs Long-Term Investor
Two people, same shares, different tax outcomes
- Bought/sold NZ shares 50 times in year
- Net profit: $45,000
- IRD view: Trading = business income
- Tax at 33%: $14,850
Family Home Exception
Couple's main home within bright-line
- Bought: $650,000 (March 2022)
- Sold: $850,000 (March 2026, 4 years)
- Gain: $200,000
- Within 10-year bright-line
Which Renovations Add Value
The Patels - Kitchen refresh ($25,000)
The Patels have a solid three-bedroom home with a dated but functional kitchen. Similar homes on their street with modern kitchens sell for noticeably more, so the kitchen sits below the street ceiling. They plan a refresh: new benchtops, cabinet doors and handles, a splashback, sink and tap, fresh paint and updated appliances, reusing the existing plumbing layout so no consent is needed.
- Renovation cost (illustrative): $25,000
- Estimated resale uplift (illustrative): $40,000
Estimated net gain: $40,000 - $25,000 = $15,000
Aroha - Adding a second bathroom ($25,000)
Aroha owns a three-bedroom, one-bathroom home in a family suburb. Most comparable homes that sell quickly have two bathrooms. She adds an ensuite off the main bedroom. Because it involves new plumbing and drainage, the job needs a building consent and licensed plumbing and drainlaying, which she budgets for.
- Renovation cost including consent and trades (illustrative): $25,000
- Estimated resale uplift (illustrative): $35,000
Estimated net gain: $35,000 - $25,000 = $10,000
A second bathroom broadens appeal to families, which is why it tends to pay back. But new plumbing is not exempt work, so the consent, the licensed trades and the sign-off are all part of the true cost. Skipping the consent to save money would risk the sale later, when a LIM or inspection reveals unconsented work.
The Nguyens - Insulation and a heat pump ($8,000)
The Nguyens have a cold, older home with no ceiling insulation and only plug-in heaters. They add ceiling and underfloor insulation and install a heat pump in the living area. Installing insulation is exempt work, and the heat pump is fitted by a qualified installer.
- Insulation (illustrative): $5,000
- Heat pump supplied and installed (illustrative): $3,000
- Estimated power saving from a warmer, more efficient home (illustrative): about $500 per year
Total cost: $8,000
Mark - Over-capitalising on a modest street ($200,000)
Mark owns a home worth about $650,000 on a street where the best homes sell for around $780,000. He spends $200,000 on a large luxury extension, an imported kitchen and a swimming pool, taking his total in the property to $850,000. When he sells, the street ceiling caps what buyers will pay, and the pool puts off some family buyers. The home sells for $760,000.
- Value before renovation (illustrative): $650,000
- Renovation spend: $200,000
- Total invested: $650,000 + $200,000 = $850,000
- Sale price achieved (illustrative): $760,000
- Value actually added: $760,000 - $650,000 = $110,000
Shortfall versus money spent: $200,000 - $110,000 = $90,000
Mark got back only about 55 cents for every dollar he spent, because the renovation pushed the home well above the street ceiling and the pool narrowed his buyer pool. The same $200,000 spread across two homes at the right level for their streets would likely have paid back far better. If he had renovated to live in and enjoy, the outcome is fine. As an investment, it lost money.
Rental Interest Deductibility
Priya - Deductible interest at 100%
Priya owns one rental in Hamilton. It is let at $650 a week, so $33,800 a year. Her mortgage is $350,000 at 6.5%, giving $22,750 of interest for the year, all of which is deductible under the current 100% rule. Priya's other income puts her on the 33% marginal rate.
- Rental income: $650 × 52 = $33,800
- Deductible interest: $350,000 × 6.5% = $22,750
- Rates: $3,000
- Insurance: $1,800
- Management fee (8% of rent): $33,800 × 8% = $2,704
- Repairs and maintenance: $1,200
- Other deductions total: $3,000 + $1,800 + $2,704 + $1,200 = $8,704
- Total deductions: $22,750 + $8,704 = $31,454
Taxable rental profit: $33,800 - $31,454 = $2,346
The Chen family - A ring-fenced loss carried forward
The Chens bought a rental in Auckland with a large mortgage. It is let at $480 a week ($24,960 a year), but the $520,000 loan at 6.5% costs $33,800 in interest. Together they earn $95,000 in salaries and hoped the rental loss would cut that tax bill.
- Rental income: $480 × 52 = $24,960
- Deductible interest: $520,000 × 6.5% = $33,800
- Rates: $2,800
- Insurance: $2,000
- Management fee (8% of rent): $24,960 × 8% = $1,996.80
- Repairs and maintenance: $2,500
- Total deductions: $33,800 + $2,800 + $2,000 + $1,996.80 + $2,500 = $43,096.80
Rental result: $24,960 - $43,096.80 = a $18,136.80 loss
The $18,136.80 loss is ring-fenced. It does not reduce the tax on the Chens' $95,000 of salary at all. Instead it is carried forward. If their rental makes a $5,000 profit next year, the carried-forward loss wipes that out, they pay no rental tax, and $13,136.80 keeps carrying forward. Full interest deductibility made the loss bigger, but ring-fencing still decides what the loss can do.
Sione - Mixed private and rental borrowing
Sione has a rental with a $300,000 loan at 6.5%, which is $19,500 of interest a year. He tops the loan up by $40,000 to buy a family car, taking the balance to $340,000 and the total interest to $22,100. He assumes all of it is deductible because the loan is against the rental.
- Interest on the $300,000 rental portion: $300,000 × 6.5% = $19,500
- Interest on the $40,000 car portion: $40,000 × 6.5% = $2,600
- Total interest charged: $22,100
Deductible interest: $19,500 only
The $2,600 of interest that relates to the car is private spending and cannot be claimed, even though the whole loan is secured against the rental. If Sione had put the car on a separate personal loan, the split would be obvious and his rental interest would stay clean. Because the two are mixed, he has to track the proportion every year.
Margaret - Before and after the phase-back
Margaret has held a rental since 2019 with a $400,000 loan at 6%, a steady $24,000 of interest a year. The rental brings in $600 a week ($31,200 a year) and has $6,000 of other deductible costs. Watch how her taxable profit falls as interest deductibility is restored, holding everything else the same. She is on the 33% rate.
- 2023/24: $6,000 other + $12,000 interest = $18,000 deductions; $31,200 - $18,000 = $13,200 profit
- 2024/25: $6,000 other + $19,200 interest = $25,200 deductions; $31,200 - $25,200 = $6,000 profit
- 2026/27: $6,000 other + $24,000 interest = $30,000 deductions; $31,200 - $30,000 = $1,200 profit
Margaret's rental tax falls from $4,356 to $396 as full deductibility returns
Rental Yield & Investment Guide
The Gross Yield Trap
Sarah, seduced by "high yield" marketing
- Gross rent: $30,160
- Vacancy (6 weeks - slow market): -$3,480
- Rates: $2,400
- Insurance: $1,600
- Maintenance (older house): $6,500
- PM fees: $2,413
- Net income: $13,767
- Mortgage (80% LVR, 6.5%): $28,997
Annual loss: -$15,230 ($293/week)
Strategic Regional Success
Mike, disciplined investor approach
- Property: $620,000 Hamilton house
- Deposit: 35% ($217,000)
- Rent: $630/week = $32,760/year
- Expenses: $13,200
- Net income: $19,560
- Mortgage: $30,451
- Annual top-up: -$10,891 ($209/week)
The Interest Rate Shock
James & Emma, caught by rate rises
- Property: $800,000 Wellington house
- Deposit: 25% ($200,000)
- Loan: $600,000 at 2.5%
- Annual mortgage: $28,809
- Net rental: $24,000
- Top-up: -$4,809/year ($92/week)
- Thought: "Easy, we can handle $100/week"
The 50% Deposit Strategy
Linda, patient wealth builder
- Property: $550,000 Christchurch house
- Deposit: 50% ($275,000)
- Loan: $275,000
- Rent: $600/week = $31,200/year
- Expenses: $12,800
- Net income: $18,400
- Mortgage (6.5%): $20,790
- Annual cashflow: -$2,390 ($46/week)
Selling Privately vs an Agent
The Wilsons - $850,000 sale
The Wilsons are selling a tidy family home in a popular suburb, and demand is steady. They compare an agent campaign with selling privately on a portal.
- First $300,000 x 4% = $12,000
- Remaining $550,000 x 2% = $11,000
- Base commission: $23,000
- Plus GST: $23,000 x 1.15 = $26,450
- Marketing (illustrative): $2,500
Total selling cost: $28,950
Priya - $1,200,000 sale
Priya is selling a higher-value home. The dollar commission is large, which increases the potential saving from a private sale, but higher-value buyers often expect a professional campaign.
- First $300,000 x 4% = $12,000
- Remaining $900,000 x 2% = $18,000
- Base commission: $30,000
- Plus GST: $30,000 x 1.15 = $34,500
- Marketing (illustrative): $3,000
Total selling cost: $37,500
The dollar saving is larger on higher-value homes, but so is the downside if a private sale attracts fewer serious buyers. On a premium home, competitive tension between buyers can matter a lot, which is where a well-run campaign can justify its cost.
Tama - $600,000 modest home
Tama is selling a modest home in a smaller town. On lower-value homes, commission is a larger share of the price, so the saving from selling privately is proportionally big.
- First $300,000 x 4% = $12,000
- Remaining $300,000 x 2% = $6,000
- Base commission: $18,000
- Plus GST: $18,000 x 1.15 = $20,700
- Marketing (illustrative): $2,000
Total selling cost: $22,700
The Coopers - when the agent earns the fee
The Coopers have a sought-after home in a rising market. Privately, they would likely accept the first keen buyer at $840,000. An agent runs a deadline campaign that draws several buyers into competition and achieves $880,000.
- First $300,000 x 4% = $12,000
- Remaining $580,000 x 2% = $11,600
- Base commission: $23,600
- Plus GST: $23,600 x 1.15 = $27,140
- Marketing (illustrative): $2,500
- Total selling cost: $29,640
Net to the Coopers: $880,000 - $29,640 = $850,360
When an agent genuinely lifts the price through competition and negotiation, the higher sale price can more than cover the commission. Here the extra $40,000 achieved outweighs the $29,640 cost, so the Coopers net about $12,360 more than a quick private sale. The lesson runs both ways: a private sale only wins if it achieves close to the price a good campaign would have.
Saving and investing Running a business Buying a first home Running a household Debt you cannot pay Scams, faulty goods and your rights Changing or losing a job Separation, death and estates Understanding your pay and tax Starting work for the first time
Every situation
Situations are taken from the guides listed above and are worked examples for education, not advice. Figures used in an example were current when the guide was written; the guide holds the maintained figure. Last reviewed 2026-09-07. See also the arithmetic on its own, every question the site answers and the guides.