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Understanding Granny Flat Interests
Before making any decisions about moving in with family, you need to understand exactly what a "granny flat interest" means for Centrelink purposes and how it affects your Age Pension. This page explains the fundamentals that underpin everything else in this guide.
What Is a Granny Flat Interest?
A granny flat interest is a Centrelink term for a specific type of arrangement where you transfer assets (usually money or property) to someone else in exchange for a lifetime right to accommodation.
Despite the name, a granny flat interest has nothing to do with physical granny flats. It applies whether you're:
- Moving into a self-contained unit on a family member's property
- Living in a room within their main house
- Contributing to a new home purchase where you'll live
- Helping with renovations or extensions in exchange for accommodation
⚡ Critical Concept: You Can't Have Both
Once you create a granny flat interest, you can no longer have a principal home for Centrelink purposes. You have one or the other - never both. This fundamentally changes how your assets are assessed.
The Homeowner vs Non-Homeowner Decision
The amount you contribute determines whether Centrelink treats you as a homeowner or non-homeowner. This single decision affects your pension rate, asset thresholds, Rent Assistance eligibility, and future aged care costs.
The threshold is $267,000 (Extra Allowable Amount)
🏠 Homeowner Status
Contribution exceeds $267,000
- Granny flat interest is exempt from assets test
- Lower asset test thresholds apply
- Not eligible for Rent Assistance
- May face higher aged care costs
🏘️ Non-Homeowner Status
Contribution is $267,000 or less
- Granny flat interest counts as asset
- Higher asset test thresholds apply
- May be eligible for Rent Assistance
- May face lower aged care costs
💡 Strategic Insight
Neither option is inherently "better" - it depends on your total assets, other income, and future plans. Our Homeowner vs Non-Homeowner Strategy page walks through exactly how to compare the options for your situation.
The Reasonableness Test
Centrelink uses a "reasonableness test" to determine whether your contribution is appropriate for the accommodation rights you're receiving. If you contribute more than the reasonable amount, the excess is treated as a gift and subject to deprivation rules.
How It's Calculated
The maximum reasonable amount is calculated using:
Combined Pension Rate × Age Conversion Factor = Maximum Reasonable Amount
| Your Age (Next Birthday) | Conversion Factor | Maximum Reasonable Amount* |
|---|---|---|
| 55 | 22.11 | $950,497 |
| 60 | 19.96 | $858,060 |
| 65 | 17.61 | $757,022 |
| 70 | 15.71 | $675,315 |
| 75 | 13.00 | $558,844 |
| 80 | 10.57 | $454,384 |
| 85 | 8.40 | $361,099 |
*Based on combined pension rate of $47,070.40 per year. Actual calculation uses your specific circumstances.
The Five-Year Deprivation Rule
If you contribute more than the reasonable amount, or if your arrangement is deemed not to be a genuine granny flat interest, the excess is treated as a deprived asset for 5 years.
⚠️ What Deprivation Means
For 5 years from the date of the arrangement:
- The deprived amount still counts as your asset for pension purposes
- Centrelink deems income from the deprived amount
- Your pension may be reduced or cancelled
- This applies even though you no longer have access to the money
The Aged Care Trap
One of the most significant risks with granny flat arrangements relates to aged care. If you need to move into residential aged care within 5 years of creating your granny flat interest, and this was "reasonably foreseeable" at the time, Centrelink may treat your entire contribution as deprivation.
⚠️ "Reasonably Foreseeable" Test
Centrelink may consider aged care "reasonably foreseeable" if at the time of the arrangement you had:
- Existing health conditions likely to deteriorate
- A diagnosed progressive condition (e.g., dementia)
- Family discussions about potential aged care needs
- Recent hospitalisation or health crisis
This is why it's critical to get proper advice and create a paper trail documenting your health status and intentions when setting up a granny flat arrangement. See our Legal Protection Guide for more details.
Essential Steps Before Proceeding
📋 Your Granny Flat Interest Checklist
- Understand the homeowner vs non-homeowner implications for YOUR situation
- Calculate the maximum reasonable amount using the age conversion factor
- Consider how the arrangement affects ALL your assets, not just the contribution
- Factor in potential future aged care needs
- Discuss with ALL family members who might be affected (including siblings)
- Get proper legal documentation BEFORE making any transfers
- Consider what happens if the arrangement breaks down
- Document your health status and intentions at the time of arrangement
Need More Help?
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Last reviewed: February 2026