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Granny flat interests and the age pension

From Modular Living Australia — the independent knowledge base Last updated: 8 Oct 2026

Services Australia assesses a granny flat interest, a right to occupy a property for life, under social security law, and by default values it at the amount paid.^[1][2] Where additional assets are transferred, a reasonableness test applies, and any amount paid above the reasonable value is treated as a deprived asset for five years; Rent Assistance is not payable on accommodation payments to the family member.^[2][5]

A common arrangement: a parent sells their home, gives the proceeds to an adult child, and moves into a granny flat built in that child's backyard. Nothing about the building is unusual. The financial consequences are, and they run through two separate federal systems that treat the same transaction differently.

Services Australia calls the parent's position a granny flat interest — a right to occupy a property for life.^[1] It is a recognised category under social security law rather than an informal family understanding.^[6] Getting the structure wrong can reduce or remove an age pension for five years.

This page summarises the published rules. It does not apply them. Services Australia operates a free Financial Information Service and directs people to it for exactly this question.^[2]

The default position §

As a general rule, the amount paid for a granny flat interest is taken to be the value of that interest.^[2][6] Where that holds, no gift has been made, and the gifting and deprivation rules do not bite.

Services Australia also states that it will not consider a person to have paid more than their interest is worth where the person is transferring the title of their home and keeping a lifetime right to live there or in another property.^[2]

The straightforward version of the arrangement therefore has a straightforward assessment. The complications arise when money moves beyond that.

When the reasonableness test applies §

Where additional assets are transferred — beyond the title of a home, or beyond the cost of constructing the accommodation — Services Australia applies a reasonableness test to value the granny flat interest.^[2][6]

The formula, as described in financial-institution and adviser guidance, is:

Reasonable value = the combined annual partnered pension rate at the date the interest was created, multiplied by an age-based conversion factor. As described in industry technical guidance^[3][4]

Three features of that calculation matter:

• The conversion factor is based on age next birthday, and for a couple, on the younger member's age.^[3][4]
• The calculation is the same whether the person is single or partnered — the partnered rate is used either way.^[3]
• The younger the person, the higher the conversion factor, and so the larger the amount treated as reasonable.^[6]

The conversion factors themselves are published by the Department of Social Services in its Guides to Social Policy Law, and Services Australia refers financial planners to that guide rather than publishing the factors on its own page.^[2] They are not reproduced here: they are indexed against a pension rate that changes twice a year, and a stale factor would produce a wrong number.

Where the value is determined by the test, published examples describe the interest being valued at the greater of the reasonableness test amount and the relevant alternative — construction costs in one worked example, the value of property transferred in another.^[3]

What happens to an excess §

If a person pays more than the value of their interest, the extra amount is a deprived asset. Services Australia works this out by subtracting the value of the granny flat interest from the amount of assets transferred.^[2]

A deprived asset does not disappear from the assessment. It continues to be counted for five years.^[5][7] The money is gone; the assessment is not. That combination is the reason this arrangement is capable of leaving a pensioner worse off than either giving nothing or giving less.

Services Australia's own published example illustrates the opposite outcome: where the amount transferred was less than the reasonableness test amount, no gift was considered to have been made and the value of the granny flat interest was simply the amount paid.^[5]

Three consequences people do not anticipate §

You may be assessed as a homeowner without being on the title

In Services Australia's published examples, people were treated as homeowners because the amount transferred exceeded the extra allowable amount — the additional assets-test threshold that applies to non-homeowners.^[5] Homeowner status carries a lower assets-test threshold. In one example the extra allowable amount at the time of a 2017 transfer was stated as $203,000; that figure is indexed and is quoted here only as the agency published it for that date.^[5]

Rent Assistance may not be payable

Services Australia's examples state directly that the people concerned were not eligible for Rent Assistance for accommodation payments made to the family member to help cover living costs.^[5] Payments to a relative in this structure are not treated the way commercial rent is.

The granny flat interest itself may be an exempt asset

In the published examples the amount paid for the granny flat interest was not assessed as an asset.^[5] This is the mechanism that makes the arrangement work when it is structured within the reasonable value — and it is lost on any amount above it.

The five-year rule §

Adviser guidance reports that the reasonableness test may also be applied where a person vacates their granny flat right within five years of its creation.^[4]

This is the provision that turns a foreseeable change in circumstances into a financial event. A move into residential aged care, a family breakdown, or a sale of the property by the child can all end the arrangement early. Financial-institution guidance raises the related point that a parent paying for a granny flat arrangement should consider whether they will retain sufficient funds if they later need residential aged care.^[8]

Capital gains tax — the 2021 change §

The tax side moved in the opposite direction, deliberately.

Before 1 July 2021, granting a legal right of occupancy could trigger CGT event D1 for the property owner — the adult child — because it is the creation of a contractual or other right.^[8] That liability was a documented reason families kept arrangements informal.

Since 1 July 2021, the ATO states that CGT does not apply when a granny flat arrangement is created, varied or terminated, where the owners and the individual with the granny flat interest enter into a written and binding arrangement that is not commercial in nature.^[1] The exemption applies only to creating, changing or terminating an arrangement — not to the eventual sale of the property.^[1]

Eligibility for a granny flat interest for CGT purposes requires that the individual has reached pension age, or has a disability meaning they require assistance for most day-to-day activities for at least 12 months.^[9] The measure applies only to agreements entered into because of family relationships or other personal ties.^[10]

The stated policy reason is worth reading, because it explains why "informal is simpler" is the wrong instinct here. Treasury's own material states that when faced with a potentially significant CGT liability, families may opt for informal arrangements, which leave open the risk of financial abuse and exploitation — for example following a family or relationship breakdown.^[10] Law-firm commentary describes the amendments as intended to ensure CGT consequences are not an impediment to formalising arrangements and to reduce the risk of financial abuse of older Australians.^[11]

Financial-institution guidance notes that the exemption applies to CGT events occurring on or after 1 July 2021 even where the arrangement was entered into before that date, which allows an existing informal arrangement to be formalised without a further CGT event.^[8]

Two systems, one transaction §

An arrangement can satisfy one system and fail the other. They are assessed separately, by different agencies, against different tests.

Where to get help §

Services Australia's Financial Information Service is free and is the body its own guidance directs people to for granny flat questions.^[2] The Department of Social Services publishes the reasonable value conversion factors in its Guides to Social Policy Law.^[2] The ATO publishes the CGT requirements.^[1]

Commercial guidance across the sources reviewed for this page consistently recommends obtaining both financial and legal advice before establishing a granny flat interest, and raises estate-planning consequences — a significant transfer to one child may cause disputes among other potential beneficiaries.^[7][8]

What this page does not cover §

Current conversion factors, pension rates, extra allowable amounts and gifting limits are not stated here. All are indexed and change; the Department of Social Services and Services Australia publish the current figures.

Aged care means-testing, state stamp duty and land tax treatment of transfers between family members, and the construction and approval rules for the dwelling itself are separate questions. For the building rules, see Granny flat rules in New South Wales and Granny flat rules and approvals by state.

Nothing on this page is financial, legal or taxation advice, and no part of it should be relied on in structuring an arrangement. It sets out what the responsible agencies have published, so that the right questions can be put to them.

References §