For retail shopowners, office managers, and industrial logistics groups, the financial feasibility of an commercial space hinges entirely on understanding how to accurately compute lease rates. Commercial leases operate on fundamentally different mathematical mechanics than standard residential tenancies.
To work out the rent for a specific space, including outgoings, GST and yearly rent reviews, use the commercial lease calculator.
Key Topics Explored Below:
1. The Australian Standard: Rent per Square Metre ($/sqm p.a.)
In Australia, commercial property lease rates are almost universally expressed as a rate per square metre per annum (per year), rather than weekly or monthly flat rates. For example, a landlord will quote a space at $400/sqm p.a. + GST.
To standardise and compare proposals, you must calculate the base rent relative to the total net lettable area (NLA).
Worked Example: Base Rent Calculation
Property Area: 180 square metres (SQM)
Quoted Base Rate: $350 per square metre per annum ($/sqm p.a.)
Annual Rent Calculation: 180 SQM × $350 = $63,000 p.a.
Monthly Rent equivalent: $63,000 ÷ 12 months = $5,250 per month
Weekly Rent equivalent: $63,000 ÷ 52 weeks = $1,211.54 per week
Note: This represents the base rent. Depending on the lease structure, outgoings and GST must be factored on top of this.
To evaluate other properties on a normalized baseline, you can utilize our dedicated Rent Per Square Metre Calculator to instantly convert flat annual quotes into direct square metre rates.
2. Gross vs Net Lease Structures & Outgoings
The distinction between a gross lease and a net lease is the single most critical structural detail in commercial real estate negotiations. It dictates who pays for the property's operational outgoings (holding costs like council rates, strata body corporate, water fees, and state land tax).
- Gross Lease: The rent is completely all-inclusive. The landlord pays for all outgoings out of the rent money. This gives tenants budget certainty.
- Net Lease: The tenant pays the base face rent plus a proportionate share of the property's running costs. If outgoings increase, the tenant is fully liable for the excess.
To model the complete financial impact of outgoings in both structures, you can use the Commercial Rent Calculator (net and gross leases).
Interactive Commercial Lease Rate Calculator
Model any commercial lease in real-time. For multi-year rent reviews, use the full commercial rent calculator.
Calculator Inputs
Calculated Rent Results
This lease calculator utilizes standard Australian commercial formulas: Base Rent = Area × Rate. Monthly figures represent 1/12th of annual rates.
4. Retail Percentage Rent & Natural Breakpoints
In prime retail settings (such as shopping centres operated by Scentre Group/Westfield), landlords frequently lease spaces with a percentage rent (turnover rent) clause. This requires the tenant to pay a base rent, plus a specified percentage of store turnover once sales surpass a threshold known as the natural breakpoint.
The Natural Breakpoint Formula
The natural breakpoint represents the turnover volume where the base rent matches the agreed percentage rate:
If your retail shop has a base rent of $80,000 p.a. and a percentage rate of 8%, your natural breakpoint is:$80,000 ÷ 0.08 = $1,000,000.
If your store turns over $1,200,000, you pay 8% on the excess $200,000:$200,000 × 8% = $16,000 in Turnover Rent. Your total annual rent would be $96,000.
To model different turnover levels, percentage rates, and artificial thresholds, use our full Retail Percentage Rent and Breakpoint Calculator.
5. Lease Incentives & Amortisation Maths
To attract tenants while keeping the visible face rent high (which preserves the property value in valuation models), landlords offer lease incentives. Common incentives are rent-free periods (e.g. 6 months rent-free) or cash fitout contributions.
This creates a major gap between the nominal Face Rent on the lease and the true Effective Rent you pay over the term. To find the true rate, you must amortise (spread out) the incentive value across the active lease period.
Worked Example: Incentives Amortisation
Consider a 5-year lease at $100,000 per year, with a 6-month rent-free period:
- Total Face Rent over term: $100,000 × 5 = $500,000
- Incentive Value (6 Months Rent): $50,000
- Net Rent paid: $500,000 − $50,000 = $450,000
- True Net Effective Rent: $450,000 ÷ 5 years = $90,000 p.a.
In this case, your true net effective rent is 10.0% lower than the face rent quoted on your contract.
Discover the direct impact of fitout subsidies, rent reductions, and compound annual reviews on your true lease valuation with the Lease Comparison & Net Effective Rent Calculator.
6. SQFT to SQM Converter: US to AU Rates
If you are reviewing international reports or dealing with overseas property owners, rates might be quoted in Square Feet (SQFT), which is the standard convention in the United States and parts of Asia.
To convert these figures back to the standard Australian square metre baseline, use the following official conversion metrics:
SQFT to SQM Converter
Converted Australian Metric Equivalent
Conversion factor: 1 SQM = 10.7639 SQFT. $/SQM rate is $/SQFT multiplied by 10.7639.