Commercial Property Insurance Online Commercial Property Insurance Calculator

Estimate your commercial property insurance needs with our Commercial Property Insurance Calculator. Calculate the right levels of cover to protect your business investment and secure your financial livelihood.

Calculator results are estimates only and not quotes. Actual quotes will be provided by licensed brokers after you submit an enquiry.

Commercial Property Insurance – Sum Insured Calculator

Work through the steps to itemise replacement costs for your building, fixed improvements, essential services/plant and external works. Add allowances (professional fees, demolition/debris, compliance) plus an inflation/contingency buffer. Optional: get a Loss of Rent suggestion. This is a planning tool only – not a quote or personal advice.

Step 1 of 7

1) Property details

These details help label your output and set GST display mode.

Occupancy / use

Property address (optional)

Construction

Year built (approx.)

GST treatment Most commercial owners set sums ex‑GST if they claim input tax credits.

Financier (optional) If there’s a financier/lessor, your broker may need this for policy notes.

Next: itemise the building and fixed improvements.

2) Main building & fixed improvements

Structure, roofing, façades, stairs/cores, internal common areas, owner’s fit‑out where applicable.

Tip: enter replacement cost (not market value). Use the GST toggle if your input includes GST.

3) Essential services & plant

Fire systems, lifts, HVAC/air‑con, electrical switchboards, solar PV, generators, pumps.

Only include landlord/owner responsibility items.

4) External works & site improvements

Carparks, driveways/paths, fencing/gates, retaining walls, signage, landscaping, bin enclosures.

If it’s on the property and would cost money to reinstate, consider listing it.

5) Landlord contents (optional) Optional

Loose items owned by the landlord (e.g., lobby furniture). Separate from building works.

If you have none, you can skip this step.

6) Allowances

These are common add-ons to reduce the risk of underinsurance after a major loss.

Professional fees (%) Architects, engineers, surveyors – applied to building works (excludes contents).

Demolition & debris (%) Applied to building works (excludes contents).

Code compliance / increased cost (%) Allowance for code upgrades during reinstatement – applied to works.

Inflation / contingency buffer (%) Applied to the total after fees/debris/compliance (including contents).

7) Optional Loss of Rent + Results

If you enter annual rent, we’ll suggest a Loss of Rent limit for the chosen indemnity period.

Annual rent ($) Optional. Use the rent you would reasonably need to insure for.

Indemnity period (months)

When you’re ready, calculate the recommended sums.

Heads‑up: Liability, Machinery Breakdown, Catastrophe/top‑up, Flood, Glass and Rent default terms vary by insurer. This tool totals user‑entered values and isn’t a quote or advice.

Get your commercial property insurance quote now

Calculator outputs are estimates only and do not constitute quotes. Actual quotes will be provided by a licensed broker after you submit an enquiry.

How to use our 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.