Shared Equity Calculator
See how an equity contribution changes your mortgage and the cost of buying back a share.
Purchase funding
Splitting the Purchase Funding
A shared-equity contribution reduces the mortgage needed to buy a property. This calculator separates the buyer’s deposit, the equity partner’s contribution and the remaining mortgage.
For an illustrative $800,000 purchase, a $40,000 deposit and a 25% contribution provide $240,000 towards the price. The buyer needs a $560,000 mortgage. With $20,000 of entered purchase costs, the buyer needs $60,000 in cash for the deposit and costs.
The buyer’s value share is 75% and the partner’s is 25%. The buyer’s share includes the part financed by the mortgage. It does not mean the buyer has 75% debt-free equity. The lender is owed the mortgage balance.
Purchase costs sit outside the property’s value shares. Enter duty, conveyancing and other costs as a separate cash amount. The calculator does not assess borrowing capacity or finance those costs.
Buying Back an Equity Share
A proportional buyout costs the property’s future value multiplied by the percentage points you buy back. Enter the share of the whole property, so buying back five percentage points reduces a 25% partner interest to 20%.
At the example future value of $880,000, that five-point buyout costs $44,000 before costs. Adding the entered $1,000 of buyout costs gives $45,000. The buyer’s value share rises to 80%, while the partner’s falls to 20%.
| Property value at buyout | Five-point buyout before costs |
|---|---|
| $720,000: 10% below purchase | $36,000 |
| $800,000: unchanged | $40,000 |
| $880,000: 10% above purchase | $44,000 |
The partner shares proportionally in the value change under this model. Buying back the entire 25% interest at $880,000 costs $220,000 before fees. Mortgage repayments reduce the bank debt separately and do not buy back the partner’s interest.
If you borrow to fund the buyout, the new debt and repayments need a separate assessment. This calculator leaves the original purchase mortgage unchanged.
Named Schemes and General Scenarios
This calculator models the percentages you enter. A named shared-equity scheme also applies its own eligibility tests, property price caps and repayment rules.
The Victorian Homebuyer Fund is closed to new participants. Existing participants can use this as a general Victorian Homebuyer Fund calculator by entering their contribution percentage and the share they intend to buy back. Their agreement and the fund’s valuation and repayment rules determine the actual amount payable.
Help to Buy accepts applications through participating lenders. Eligible buyers contribute at least a 2% deposit. The Government can contribute up to 30% for an existing home or 40% for a newly built home. Income limits, financial capacity tests and location-based price caps also apply.
The Help to Buy Customer Guide bases buybacks on the current property valuation. A partial repayment must be at least 5% of the property’s current value, rounded to the nearest $1,000. A full repayment can clear the remaining Government share. Valuation and administrative costs are additional.
The general calculation does not apply those minimums or rounding rules. Approved improvements and other scheme valuation adjustments can also change the financial interest. Use the scheme’s assessed valuation and repayment amount when arranging an actual buyout.