The Government announced a range of measures which in their view address the supply and demand for residential properties (in addition to measures already in force such as the ring-fencing of residential rental property losses). Each of these have the potential to have a major impact on anyone who currently owns, or is considering transacting in, a residential property. The announcements do not apply to commercial properties.

The three main announcements are:

If you are currently in the middle of a residential property transaction, please urgently seek our advice without delay.

For detailed information you can refer to the Government’s media statement and fact sheets on the bright-line test and interest deductions. The devil will be in the detail and we are expecting further information as these changes unfold.

While there is no need to panic, it is important you know how the changes could affect your cash flow. We summarise the key points below:


1) Increase in bright-line test from five years to 10 years effective from 27 March 2021

2) Changes to the main home exemption from bright-line test

3) Intention to remove interest deduction on residential properties

– Ordinarily, you’d subtract your insurance, maintenance, interest, and other costs from the income you get from renting out your property, and you’d pay tax on the profit. These changes mean you remove interest from that equation, so that will increase your profit in the eyes of the IRD, and you’ll be paying tax on a higher amount. This is likely to mean you’ll have more tax to pay, which will most likely be funded from your personal cash flow.

– For properties yet to settle (bought after March 27th) you won’t be able to claim interest costs at all from October the 1st. For properties you already own this ability will be phased out over the next four years, starting in October. However, ‘new build’ properties may be exempt from these changes, subject to consultation on the changes.

– Property developers (who pay tax on the sale of property) will not be affected by this change. They will still be able to claim interest as an expense.

– Consultation will cover an exemption for new builds acquired as a residential investment property, and whether all people who are taxed on the sale of a property (for example under the bright-line tests) should be able to deduct their interest expense at the time of the sale.

The impact in dollars and cents

How much of an existing investment property’s interest cost you can claim will start to diminish over the next four years.

Based on the scenario below, of $700,000 of investment property debt at 3% interest, we estimate the approximate annual cost to be between $735 – $1,023 in year one, and between $5,880 and $8,190 by the time it has been completely phased out.  

Income Year% of interest cost you can claimCash impact 28% company tax rateCash impact 30% personal tax rateCash impact 33% personal/Trust tax rateCash impact 39% personal tax rate
April 2021 – March 2022 (transitional year)1 April – 30 September, 100% 1 October – 31 March – 75%$735$787.5$866.25$1,023.75
April 2022 –March 202375%$1,470$1,575$1,732.50$2,047.5
April 2023 –March 202450%$2,940$3,150$3,465$4,095
April 2024 –March 202525%$4,410$4,725$5,197.50$6,142.5
April 2025 onwards0%$5,880$6,300$6,930$8,190


Please note this scenario doesn’t consider any losses that can be carried forward from previous years and don’t include any measures to offset the impact, such as increasing rents. Also bear in mind that interest rates are likely to only trend in one direction – upwards!

If you are unsure how these changes affect you or would like some clarification, please contact one of the team today for more information. In the meantime, we will continue to keep you updated.