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SharonC3(Initiate)Initiate
24 May 2026

I have a question about the third element of the cost base for a property that has a partial main residence exemption. If someone bought a vacant block of land in 2020, built a house on it in 2023, and then moved in. They sold the property in 2026. They had another main residence for the period 2020 to 2023, so they can't claim a full main residence exemption. 

My question is about the holding costs, such as interest, rates and insurance. Are these costs able to be added in for the whole ownership period?  Would the gain be calculated as the sale price less cost (including holding costs for the ownership period), and then the net gain is apportioned based on non-main residence days?

Are the holding costs for the entire ownership period included, or only for the period when it was vacant land?

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2 replies
89 views
2 replies

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YellowPotato(Taxicorn)Taxicorn
25 May 2026

How to calculate your CGT

Parital Main Residence Exemption

Holding Cost



Property's purpose affects whether or not there's income tax deduction, doesn't affect whether or not you can add holding cost.


You can add holding cost from acquisition date to disposal date, though it can't make a capital loss larger. Because when there's a Capital Loss, 'reduced cost base' is used instead of cost base


Exemption and Discount is applied on the gross gain/loss

25 May 2026

Assuming this is a gain, holding costs get added to the cost base in full to work out the total gain on the property. Then that gain is apportioned between the main residence and non-main residence periods, then the 50% discount applied if applicable.

Depending what you did with your first property, look into whether the 6 month overlap rules can apply to help you reduce the non-main residence period a little more. https://www.ato.gov.au/individuals-and-families/investments-and-assets/capital-gains-tax/property-and-capital-gains-tax/your-main-residence-home/moving-to-a-new-main-residence

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Are holding costs included for the full ownership period in partial CGT exemption? | ATO Community