Do UK Contractors Pay Tax on NZ or Aussie Rentals?

Emma, a software developer from Wellington, has been contracting in London for three years. She still owns a tidy little rental back home, and one day she thinks she'll move back to Silicon Welly, so is holding onto it for now (while also hoping prices improve). Her NZ accountant files her New Zealand return, the rent ticks over, and she'd assumed that was the end of it. "I pay tax on it in New Zealand," she told us, "so I don't need to worry about it here, right?" It's the same line we hear from Aussies with a place in Brisbane or Perth. And it's not exactly right.

The short answer is yes, you do. If you're a UK tax resident, rental profit from an Australian or New Zealand property is normally taxable in the UK, and you have to report it to HMRC, even if you've already paid tax on it back home. You usually won't pay twice, because the UK's double tax agreements let you claim credit for the tax already paid down under. But "I've sorted it overseas" is not the same as "I've sorted it", and the gap between those two is where people get caught.

Back in the age of non-dom, these things could slip through in a lot of cases, but that regime is now gone for good, and FIG is here (Foreign Income and Gains). Plus the rental property profit calculation between NZ/Aus and the UK now diverges enough that a loss-making rental back home could be a profitable rental (on paper at least) in the eyes of HMRC. So let's walk through it properly.

It's your UK residency that pulls the trigger, not where the bricks are

Here's the thing that trips people up. UK tax doesn't care that the house is eight thousand miles away. What matters is you. Once you're a UK tax resident, the UK taxes you on your worldwide income, and that includes rent from a property in Auckland, Adelaide or anywhere else.

Whether you're UK resident is decided by the Statutory Residence Test, which counts days in the UK alongside your work and home ties. If you've been here a few years with a job and a flat, you're almost certainly resident. You can read the basics on the tax on foreign income pages at gov.uk.

One more thing worth flagging, because the old advice is now out of date. Up until recently, "non-doms" could often keep foreign income outside the UK net using the remittance basis. That framework is gone. From 6 April 2025 the UK moved to a residence-based system, with a four-year Foreign Income and Gains regime for qualifying new arrivals instead. So if you read a forum post from 2022 telling you your overseas rent is none of HMRC's business, bin it. The rules changed.

You don't just copy your overseas tax return into your UK one

This is the single most common wrong assumption, so it gets its own section. If your property is loss-making back home, then you think it's also loss-making in the UK.

Your New Zealand or Australian accountant works out a profit (or a loss) under New Zealand or Australian rules. That figure is the right figure, for them. It is not the figure you hand to HMRC.

The UK starts again from the same real-world property, but recalculates the result under UK rules. Same rent, same tenants, same mortgage, completely different sum. You take the actual rent and the actual costs for the UK tax year, then apply UK rules on mortgage interest, repairs, capital items and losses, convert everything to sterling, and report it on the foreign pages of your Self Assessment return (the SA106). Your overseas return is useful evidence. It is not the answer.

And here's the catch that surprises a lot of people: a property that loses money under Australian rules can still hand you a UK tax bill. To see why, we need to talk about negative gearing.

The negative gearing trap, and why Australia is pulling it apart

Negative gearing is the Australian arrangement a lot of people quietly envy. In plain English: if your Aussie rental costs more to run than it brings in, that loss can usually be set against your other income, your salary included, knocking down your overall tax bill. Mortgage interest, running costs, even the decline in value of the building and its fittings all feed into it.

New Zealand also used to have structures, including loss attributing qualifying companies (LAQCs) and later look-through companies (LTCs), that made rental losses feel more like classic negative gearing. LTCs still exist, and they still pass tax results through to their owners, but residential rental loss ring-fencing now means those losses generally cannot be offset against salary or other non-property income. In other words, an LTC does not usually rescue a loss-making NZ residential rental from the ring-fencing rules.

The UK has never worked like this. So if you're sitting on an established Australian rental, here's the mental model worth holding onto.

In Australia, a loss-making rental can reduce the tax on your wages. In the UK, an overseas rental loss is ring-fenced. It can only be carried forward against future profits from the same overseas property business. It can't touch your salary, and it can't even be set against your UK rental profits, because HMRC treats your UK property business and your overseas one as two separate things. Same loss, two completely different outcomes depending on which side of the world is taxing it.

Now for the part that's actually changing. In the 2026 Federal Budget, handed down on 12 May 2026, the Australian government announced it's winding back negative gearing. The proposal is to limit it to new builds from 1 July 2027. The legislation was introduced on 28 May 2026 and is still working its way through Parliament, so treat the detail as firm intention rather than settled law, and expect some of the edges to move.

As things stand, the proposals shake out into three groups.

1. Properties held before Budget night (7:30pm AEST, 12 May 2026). Grandfathered. Classic negative gearing continues as before. If this is you, nothing changes for now.
2. Established properties bought after Budget night. From 1 July 2027, the proposal is that losses can still be set against residential property income and carried forward, but no longer against salary or other income. In other words, Australia moves much closer to the UK's ring-fenced model.
3. New builds. Still fully negatively geared, to push investment towards new housing supply.

So for established properties bought from now on, Australia is quietly drifting towards the UK system. But "closer" isn't "identical", and the next difference is the one that does the real damage to your UK bill.

Mortgage interest: the bit that was never really yours to deduct

If there's one number that catches people out, it's the mortgage interest.

In Australia (and again in New Zealand), the interest on a buy-to-let loan is generally a straight deduction. It comes off the rent before you're taxed. Simple.

The UK pulled that apart for residential landlords a few years ago. You no longer deduct residential mortgage interest from your rental profit at all. Instead you get a tax reduction worth 20% of the interest, the basic rate, and no more. If you're a higher-rate taxpayer, that's a real cost, because you're being taxed on rent you're handing straight to the bank.

Time for some actual numbers. Say Josh from Perth has an established rental he bought a few years back. Keeping the maths clean at roughly two Aussie dollars to the pound:

1. Rent: AUD 36,000 (about £18,000)
2. Mortgage interest: AUD 30,000 (about £15,000)
3. Other allowable costs, think rates, insurance, letting fees, repairs: AUD 8,000 (about £4,000)
4. Depreciation: AUD 2,000 (about £1,000)

In Australia, Josh adds all that up and lands on a loss of about AUD 4,000. Negatively geared, that loss comes off his salary. Happy days, locally.

Now run it through UK rules. Start with the £18,000 of rent. Take off the £4,000 of genuine running costs. The depreciation? Gone, the UK gives no relief for the wear and tear of a residential building (there's a separate, narrower relief for replacing furniture and white goods, but not for the building itself). And the £15,000 of interest doesn't come off the rent either. So Josh's UK taxable profit is £14,000.

The interest then comes back as a tax reduction, but only at 20%, and only against the property profit. Twenty per cent of £14,000 is £2,800 knocked off his tax. Useful, but a long way short of the full relief he got at home.

So a property that lost AUD 4,000 in Australia produces £14,000 of taxable profit in the UK. In a world of unintended consequences, this is a chunky one.

A quick word on capital gains, because it's part of the same reform

This blog is about rent, not selling, so we'll keep this short. But the same 2026 Australian Budget that's reshaping negative gearing also takes aim at capital gains tax. The proposal is to replace the flat 50% CGT discount with a discount based on inflation, plus a minimum 30% tax on gains, again from 1 July 2027, with new-build investors able to choose the old 50% discount. Like the rest of the package, it's still going through Parliament.

Why mention it here? Because if you're a UK resident, the day you sell that overseas property is a UK matter too, not just an Australian one (New Zealand has no general capital gains tax, so to some Australians it's now looking like a bit of a tax haven), and the two systems will once again be running different sums on the same sale. That's a whole separate conversation, and our tale of two sisters piece is a good starting point. For now, just file it under "ask before you sell, not after".

New Zealand has its own quirks

New Zealand sits somewhere in between, and it's been a moving target.

On interest, the Kiwi rules have swung back and forth. After a period of phasing the deduction out, from 1 April 2025 landlords can again claim 100% of the interest on a residential rental loan, subject to the usual tracing rules. Good news in New Zealand. It makes no difference to your UK return, though, because the UK interest restriction still applies regardless of how generous Inland Revenue is being this year.

On losses, New Zealand does not copy Australian negative gearing. Residential rental losses are ring-fenced, so they can only be carried forward against residential property income, not set against your salary. That's actually quite close to the UK approach, which makes Emma's Auckland flat a little simpler to reconcile than Josh's Perth one. And on depreciation, New Zealand sets the rate for residential buildings at 0%, much like the UK, though some chattels and fit-out can still be depreciated separately.

The practical workflow for a UK-resident Kiwi is worth spelling out, because we run it a lot. The New Zealand return gets filed first, the figures flow through to the UK Self Assessment, and the foreign tax credit is applied here. We handle the UK end.

How the double tax agreement actually saves you (and how it doesn't)

The double tax agreement does not mean only one country taxes the rent. What it actually does is this. The country where the property sits gets to tax the rental income. The UK then taxes you on the same income as a UK tax resident, and gives you credit for the overseas tax you've already paid. That's Foreign Tax Credit Relief, and it's the mechanism that stops you from getting taxed twice.

The relief is narrower than people hope in two ways. First, the credit is capped at the UK tax due on the same foreign income, so if the overseas tax is higher, HMRC will not refund the excess. Second, you need enough detail to match the foreign tax to the income it relates to. If you have more than one overseas property, especially in more than one country, do not rely on one combined figure. Keep separate records of rent, expenses, profit or loss, and overseas tax paid for each property, so the UK Foreign Tax Credit Relief calculation can be supported.

A couple of practical snags sit underneath all this. The tax years don't line up: the UK runs 6 April to 5 April, Australia runs 1 July to 30 June, and New Zealand runs 1 April to 31 March (though in practice the NZ tax year is treated as close enough to the UK one that the figures are usually used as they stand). And everything on the UK return goes in sterling, with foreign tax converted at the exchange rate when it became payable. None of this is hard, exactly, it's just fiddly.

When and how to report it, and the "they'll never know" theory

For most people this lands on the Self Assessment return, on the foreign property pages (the SA106). If your total property income is genuinely tiny there's a £1,000 property allowance that may cover it, but for anyone with a real rental that won't stretch far.

If you're not already in Self Assessment, you'll need to register, and the deadlines matter. The online filing deadline is 31 January after the end of the tax year, with tax due on the same date.

And no, sitting quietly and hoping isn't a strategy (even though hope is a very powerful emotion 🙂). New Zealand and Australia both share financial information with HMRC automatically under the Common Reporting Standard. The data on your overseas rental account can land on a desk in the UK without you lifting a finger. If you've not been declaring overseas rent you should have, it's far cheaper to put it right voluntarily than to wait for the letter - we run a separate Disclosure service specifically for clients who need to update HMRC with overseas income that they should have been reporting.

Frequently asked questions

Do I still have to report it if the property makes a loss? Not necessarily just because the overseas tax return shows a loss, but you do need to check the UK position. HMRC recalculates overseas rental income under UK rules, and the UK result may be different from the Australian or New Zealand result, especially because UK mortgage interest relief for residential property is restricted. If the UK calculation shows a profit, it should be reported and taxed in the UK. If the UK calculation shows a loss, there may be no UK tax to pay, but if you are already filing a Self Assessment return it is usually sensible to report the loss so it can be carried forward correctly.

I've already paid tax in Australia or New Zealand. Surely that's enough? Not on its own. If you're UK tax resident, you still need to declare the income to HMRC and then claim Foreign Tax Credit Relief for the overseas tax paid. You usually won't pay tax twice on the same income, but you do need to do the UK paperwork to prove it.

Does Australia's negative gearing change affect my UK tax? Not directly. The UK does its own calculation under UK rules, and overseas property losses are kept separate from UK property income and your other income. So a change to Australia's negative gearing rules does not rewrite your UK tax position. What could change is your Australian tax position under the recently announced rule changes.

Which exchange rate do I use? Convert the rental income and expenses into sterling for the UK tax return. For regular monthly rent and costs, a sensible, consistent average rate, monthly or annual, is usually acceptable. For foreign tax paid, convert the tax into sterling on a reasonable and consistent basis, ideally using the rate at the date the tax was paid or became payable, and keep a note of the rate used.

The bottom line

Strip it all back and it's simple enough. If you're a UK resident, your Australian or New Zealand rental is part of your UK tax picture. You declare the income here in the UK, you recalculate the profit under UK rules rather than borrowing the figure from home, and you use Foreign Tax Credit Relief to avoid being taxed twice. The job hasn't changed. You still earn the rent, you still have the costs, and you still pay tax on the difference. What's changed is that two tax systems are looking at the same property, and they don't agree on the maths.

Let's have a chat

If you're a Kiwi or Aussie contractor with a rental back home and you're not sure where it sits for UK tax, get in touch with No Worries Accounting. We've been guiding Kiwi and Aussie contractors through the UK tax system for over twenty years, and cross-border property is bread, butter, and marmite for us. If you need assistance or just looking for a steer, we can help 🙂

*This article is general information, not personal tax advice. Cross-border tax turns on your specific facts, and the Australian reforms described are still making their way through Parliament, so the detail may shift. Have a quick chat before you act on any of it.*