Office Insurance Solutions Commercial Property Insurance Calculator

Our Commercial Property Insurance Calculator helps Australian business owners and commercial landlords estimate an appropriate commercial property insurance sum insured based on today’s replacement costs. This matters because underinsurance can lead to reduced claim payments (for example, average or co-insurance adjustments) and cashflow strain when rebuilding, replacing fixed improvements, or restoring essential services after a loss. The calculator is designed to support budgeting and discussions with your insurer or broker, not to provide a quote.

How to complete the calculator for the best result

1. Occupancy or use: Select the closest match (Retail, Office, Industrial or Warehouse, Mixed-use, Hospitality, Medical, Other). This helps you think through the typical building features and services that may need reinstatement.

2. Property details: Add the address (optional), construction type, and approximate year built. These details can affect rebuilding complexity and code compliance expectations, which you should reflect in allowances.

3. GST treatment: Choose GST-registered to show totals excluding GST (common where input tax credits may be claimed). Choose not GST-registered to include GST. Use the option that matches how your claim costs would be funded.

4. Main building and fixed improvements: Add each building item and enter a realistic replacement amount for structure and fixed owner improvements. Itemising avoids missing costly elements.

5. Essential services and plant: Add fire systems, lifts, HVAC, switchboards, solar, generators, pumps and similar. These can be significant and are often underestimated.

6. External works and site improvements: Include carparks, fencing, retaining walls, signage, landscaping and access works.

7. Landlord contents (optional): Add loose items owned by the landlord, separate from building works.

8. Allowances: Enter percentages for professional fees, demolition and debris, code compliance, and an inflation or contingency buffer. These allowances can materially change the recommended sum insured.

9. Optional loss of rent: Enter annual rent and select an indemnity period in months to estimate a potential rent cover limit.

How to interpret results

The calculator totals your itemised costs and applies the allowances to produce estimated recommended sums insured. Treat the output as an estimate only. Before buying or changing cover, read the relevant PDS and consider exclusions, limits, flood, machinery breakdown, glass, liability and insurer definitions. If unsure, seek advice from an appropriately licensed insurance broker or adviser.