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autumn(Newbie)Newbie
20 May 2026

Hi!


I'm hoping the ATO community can provide clarity on a scenario.


It's regarding the use of Section 118-192 of the ITAA 1997 and using the 6-year rule (118-145) in parallel. Specifically, can these two provisions operate together in the following scenario?


Scenario (dates and amounts are made up):


  • Home was purchased in Jan 2013. Purchase Price = 200k (excluding stamp duty).
  • This home was the Principal Place of Residence (PPOR).


  • Owner lived in the first home for the first year (Jan 2013 - Jan 2014) as their PPOR. Improvements were made (during that time), and the home was revalued by a Certified Practising Valuer (API-accredited) at 300k as at Jan 2014.


  • During Jan 2014-Jan 2017, the owner was renting (due to work relocation) and had no other PPOR during this period.


  • The owner then purchased a second property and treated that property as their new PPOR in Jan 2017.


  • The first home was then sold in Jan 2026 (for 500k).


My understanding is:


  1. We can use Section 118-192 of the ITAA 1997 to re-set cost base (as it was originally their main residence and was later used to produce income).
      1. Cost base re-sets to 300k
      2. CGT = 200k
  2. Using the 6-year (118-145) rule:
      1. Tax-exempt period = Jan 2014 - Jan 2017 (3 years)
      2. Taxable period = Jan 2017 - Jan 2026 (9 years)
      3. 9 out of 12 years = 75%
      4. CGT = 75% x 200k = 150k
  3. Apply 50% CGT discount:
      1. GCT = 50% x 150k = 75k

Net capital gain = 75k


Could someone please confirm whether this interpretation/calculation is correct, particularly:


  • Whether s118-192 and s118-145 can be applied together in this way?


Thank you in advance!








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2 replies
42 views
2 replies

All replies

20 May 2026

based on the facts above, that's correct. Apportionment is on a days basis but the principle is the same. Bear in mind if you have any capital losses, they are applied before the discount is applied.

Taxduck(Taxicorn)Taxicorn
20 May 2026

Calculation is incorrect as all time periods need to be converted to days.

From guidelines on 6 year rule

"You can choose when to stop the period covered by your choice. For example, if you rented it out for 5 years, you can choose to treat the property as your main residence for 3 years."

Treating former home as main residence | Australian Taxation Office

In your situation you can choose to treat the property as your main residence (PPOR is not an ATO term) for 3 years, while absent , up until the purchase of the new home. New home is then main residence.

Cost base (element 1) is value of home when first produced income.

See below

Using your home for rental or business | Australian Taxation Office

Calculation is below

Partial exemption | Australian Taxation Office

Ownership period (in calculation) is from date home first used to produce income until sale date.

Other cost base elements below

Cost base of assets | Australian Taxation Office

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Can Sections 118‑192 and 118‑145 Apply Together for CGT? | ATO Community