If you own a rental property in New Zealand and it's costing you more than it earns, you might have heard the term ring-fencing thrown around. It sounds complicated but it's actually pretty straightforward once someone explains it properly. This guide helps you to learn everything about ring-fencing from starting to end. You can also read the official IRD page on residential rental property deductions for the technical detail, or talk to our rental tax team if you'd rather just get it sorted.
First — What Is a Rental Loss?
When you rent out a property, you earn rental income. But you also have expenses — things like mortgage interest, rates, insurance, property management fees, repairs and maintenance. You add up all your income, then subtract all your expenses.
If your expenses are more than your income, your rental property has made a loss for that year. Here's a simple example:
| Item | Amount |
|---|---|
| Rental income received | $22,000 |
| Mortgage interest | $18,000 |
| Rates | $2,500 |
| Insurance | $1,800 |
| Repairs and maintenance | $1,200 |
| Property management fees | $1,500 |
| Total expenses | $25,000 |
| Rental loss | -$3,000 |
In this example the landlord made a $3,000 rental loss. Before ring-fencing rules came in, that $3,000 could reduce their salary income — meaning less tax overall. Ring-fencing stopped that from happening.
What Does Ring-Fencing Actually Mean?
Ring-fencing means that you can only use rental losses to lower your rental income, not any other income that you have.
If you make $80,000 a year from your job and your rental loses $3,000, so you can't lower your taxable income to $77,000 anymore. Your salary stays at $80,000 for tax purposes, and the $3,000 rental loss is locked away under ring-fencing tax rules.
What Happens to the Loss Then?
The loss doesn't disappear. It gets carried forward to the next tax year — and the year after that if needed. It just sits there waiting until your rental property starts making a profit.
Your rental makes a loss
Your expenses (interest, rates, insurance, repairs) are more than your rental income for the year.
Loss gets ring-fenced
You can't use it to reduce your salary or other income. It gets locked away and carried forward to the next year.
Carried forward every year
If your rental still makes a loss next year, the losses keep adding up and carrying forward.
Future rental profit offsets it
When your rental eventually makes a profit, the carried-forward losses reduce how much of that profit you pay tax on.
A Simple 3 Year Example
📊 How Carried Forward Losses Work Over Time
| Year | Rental Result | Carried Forward Loss | Taxable Rental Income |
|---|---|---|---|
| Year 1 | -$3,000 loss | $3,000 | $0 |
| Year 2 | -$1,500 loss | $4,500 | $0 |
| Year 3 | +$6,000 profit | $4,500 used up | $1,500 |
When Did Ring-Fencing Start in NZ?
The ring-fencing rules came into effect from the 2019/2020 tax year onwards. Before that, landlords could offset rental losses against their salaries, wages or other income — which effectively meant the government was partly subsidising negatively geared rental properties.
IRD changed the rules to make the system fairer. Now residential rental losses are ring-fenced and can only be used to offset future rental profits. You can read the full details on the IRD residential rental property deductions page.
It's worth noting this applies to residential rental properties. Commercial properties have different rules. Holiday homes and short-stay rentals like Airbnb are also included under the ring-fencing rules.
Does Ring-Fencing Apply to All Rental Properties?
| Property Type | Ring-Fencing Applies? |
|---|---|
| Standard residential rental (long-term tenancy) | ✓ Yes |
| Short-stay / Airbnb accommodation | ✓ Yes |
| Holiday homes rented out | ✓ Yes |
| Commercial property | ✗ Different rules apply |
| New builds (some exceptions may apply) | ✓ Check with accountant |
| Mixed use property | ✓ Mixed use rules apply |
The Portfolio Basis — Multiple Properties
If you own more than one residential rental property, IRD allows you to calculate your ring-fencing on a portfolio basis rather than per property. This means you add up all the income and losses across all your rentals together.
So if one property makes a profit and another makes a loss, they can offset each other — which is often a much better outcome than treating each property separately.
Portfolio basis is almost always the better option for landlords with multiple properties — but it needs to be set up correctly in your tax return. Make sure your accountant is calculating it this way if you have more than one rental.
What Happens to Losses When You Sell?
This is something a lot of landlords don't know. When you eventually sell your rental property, any remaining carried forward losses that you haven't been used up can be released at that point.
So if you have $8,000 in ring-fenced losses sitting there and you sell the property, those losses can finally be offset against other income in the year of sale. The money doesn't just disappear — you do eventually get the benefit. Note that if the sale is taxable under the bright-line test, the rules around how losses are released work slightly differently — your accountant will handle this correctly in your return.
What Can I Do to Reduce the Impact?
Claim every deduction
Make sure your return includes all of your legitimate costs especially chattel depreciation, home office costs and motor vehicle expenses. When you're making money, more deductions mean less taxable profit.
Use portfolio basis
If you own more than one property, make sure your accountant is calculating ring-fencing based on your whole portfolio instead of each property.
Interest deductibility
From 1 April 2025, interest is 100% deductible again for most residential rentals. This will push many landlords from a loss position into profit sooner.
Review your structure
Your ownership structure (personal, company, LTC or trust) affects how income and losses flow through. Worth reviewing with a specialist accountant.
📋 Key Takeaways
- Ring-fencing means residential rental losses can't reduce your salary or other income
- The losses get carried forward and used when your rental eventually makes a profit
- Ring-fencing rules have been in place since the 2019/2020 tax year
- If you own multiple rentals, use the portfolio basis — it combines all properties together
- When you sell the property, any unused carried forward losses can be released against other income
- Make sure your accountant is tracking carried forward losses correctly every year
Frequently Asked Questions
Need Help With Your Rental Tax Return?
Ring-fencing rules catch a lot of NZ landlords off guard. At Elite Taxation we handle rental property returns for landlords all across New Zealand — Auckland, Wellington, Christchurch, Hamilton, Tauranga and everywhere else. We make sure your ring-fenced losses are tracked correctly every year.
Talk to Our Rental Tax Team →