A One Accountants Pty Ltd

Property Development

Property Development Feasibility Calculator

Property Development Viability Tool

Assess the financial viability of an Australian property development project

Land Acquisition

Development Costs

Holding & Finance Costs

Interest is calculated on the construction loan assuming average 50% drawdown over the project period (line-of-credit method). Adjust the loan amount to reflect your actual finance structure.

Sales & Revenue

Under the GST Margin Scheme, GST = 1/11 × (Sale Price − Land Cost). Under Full GST, GST = 1/11 of gross sale price. New residential dwellings are generally taxable; existing residential may be input taxed. Consult your accountant.

Total Revenue (GDV)
Gross Dev. Value
Total Project Cost
All in
Developer’s Profit
Before tax
Profit Margin on Cost
Profit ÷ Cost
Profit on GDV
Profit ÷ Revenue
Return on Equity
Profit ÷ Equity
Profit Margin on GDV0%
0% — Loss15% — Viable25%+ — Excellent

Cost Breakdown
Land Purchase Price
Stamp Duty
Due Diligence & Legal
Construction Cost
Design, DA & Consultants
Council Levies
Landscaping & External
Insurance & Bonds
Construction Contingency
Finance Interest (construction)
Holding Rates & Land Tax
Sales & Marketing
GST Payable (net)
Total Project Cost

Revenue & Profit
Gross Development Value (GDV)
Less: Total Project Cost
Developer’s Profit (before income tax)
Equity Invested
Return on Equity
Annualised Return on Equity

Important Disclaimer: This calculator is provided by A One Accountants Pty Ltd for general informational purposes only. Development feasibility is highly sensitive to construction costs, market conditions, interest rates, planning outcomes, and timing. All figures are estimates based on user inputs and standard industry assumptions. GST calculations are simplified and do not replace formal GST advice. Profit and return figures are pre-income-tax estimates only. Please consult us if you require specific advice before committing to any development project. A One Accountants Pty Ltd accepts no liability for any loss arising from reliance on this tool.