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acacia1(Newbie)Newbie
5 Sept 2025

Hello!


I have been reading some articles in the community, but they might be too behind with recent rule changes. I am finding it hard to get a up to date and specific details about Capital Gain Taxes for my case (which is not too complicated), and hoping if this wonderful forum could help.


We are currently living in our Principal Place of Residence (PPoR) in suburb A. About 3 years ago, in 2022, we purchased an investment property (IP) in suburb B and we rented it out since we purchased it. As of now, it has tents. Our plan is to end the lease agreement in a couple of months (by end of 2025), knock it down, and rebuild a new house. Then, we move in the new house as our PPoR. We are planning to sell our property in suburb A before moving into the new house in suburb B when it is ready. 




My question is therefore about CGT, timing, and value of property in suburb B. 


1- From when the tenant leaves until we move into it as our PPoR, is the property/land an Investment Property? 

1A: if YES, does it means the property can be used for negative-gearing? can the cost of knock-down & rebuilding be calculated towards deductibles for Capital Gain Taxes? 


1B: if NO to question 1, then how CGT is calculated at the time of selling the house after, e.g. 20 years (year 2045)? We can get a real-estate agent to provide an appraisal for the market value the property just after the tenant leaves. Can this appraisal be used in year 2045 to calculate the CGT of property? By this, I mean the Capital Gain of IP period, which is CGT of investment for (Appraisal Amount - purchase price) + CGT of PPoR for (sell price - (appraisal + build-cost)). 


I am mostly uncertain about the gain & deductibles during IP and PPoR periods. Thanks for helping, it is greatly appreciated. 

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3 replies
1,054 views
3 replies

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Most helpful reply

Taxduck(Taxicorn)Taxicorn
5 Sept 2025

  1. Doesn't need to be. Once you have demolished the dwelling the vacant land can be treated as your main residence for up to 4 years before you move in to the new dwelling. Guidelines below.

Building or renovating your home | Australian Taxation Office

Can only negative gear if you are earning rental income

How to claim rental expenses | Australian Taxation Office

CGT calculated by the following

Sale price - cost base = gain x days property not main residence/days of ownership.

Cost base below

Cost base of assets | Australian Taxation Office

No market value appraisals are required.

All replies

Most helpful reply

Taxduck(Taxicorn)Taxicorn
5 Sept 2025

  1. Doesn't need to be. Once you have demolished the dwelling the vacant land can be treated as your main residence for up to 4 years before you move in to the new dwelling. Guidelines below.

Building or renovating your home | Australian Taxation Office

Can only negative gear if you are earning rental income

How to claim rental expenses | Australian Taxation Office

CGT calculated by the following

Sale price - cost base = gain x days property not main residence/days of ownership.

Cost base below

Cost base of assets | Australian Taxation Office

No market value appraisals are required.

acacia1(Newbie)Newbie
8 Sept 2025

I appreciate your comments and references. It helped to get a clearer picture of the regulations. I have one more question following the new understanding.


Basically, the overlap possession of the both properties, taking away 6 months (let me call this CGT-Period), is subject to CGT for one of the properties. So, I have 2 options: the first or second house to count for CGT over CGT-Period (which the amounts are with respective to their possession durations).


My question:

I am going to sell first property around the time I move in the second one. can I decide about which property to count for CGT over CGT-Period in future when I sell the second property (e.g. 5 or 15 years after that)?

This way I don't have to guess when I would sell my second property (and hence, how long I'd possessed it) and which option is more reasonable for me to use.


Thanks again,

Taxduck(Taxicorn)Taxicorn
9 Sept 2025

Make the decision on which property will be your main residence (during the period you own both properties) after you sell the first of the properties.

How you prepare your tax return for the year in which the first of the properties is sold indicates to the ATO how you are going to treat the sale. Either as a CGT event and calculation of a gain/loss, or as a CGT event and claiming an exemption (main residence exemption).

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CGT for Knock-Down/Rebuild Investment Property (IP) and use as Principal Place of Residence (PPoR) | ATO Community