# Commercial Lease Calculator

URL: https://speedycalculator.com/calculators/finance/commercial-lease/
Last updated: 2026-10-25

> The commercial lease calculator works out the annual and total rent for office, retail or industrial space from the area, base rent and operating expenses (triple-net charges), and the broker's fee on the lease.

## Inputs

- Area (ft², m²)
- Base rental rate (per ft² per year)
- Operating expenses (per ft² per year)
- Lease duration (years)
- Annual rent escalation (%)
- Agent commission (% of total base rent) (%)

## Results

- Total rental rate (per ft² per year)
- Rent – first year
- Rent – first month
- Total rent over the lease
- Agent commission

## Formula

```
Total rental rate = base rent + operating expenses (per ft² per year)
Annual rent = area × total rental rate
Total lease cost = annual rent × years (with yearly escalation)
Broker fee = commission % × total base rent
```

## Explanation

Commercial rents are usually quoted per square foot per year. In a triple-net (NNN) lease the tenant also pays a share of taxes, insurance and maintenance on top of base rent. Leases often include yearly escalations of 2–4%.

### How to use the Commercial Lease Calculator

- **Area**
- **Base rental rate (per ft² per year)**
- **Operating expenses (per ft² per year)**
- **Lease duration**
- **Annual rent escalation**
- **Agent commission (% of total base rent)**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter the area, base rent and operating expenses per square foot per year, the lease term, annual escalation and broker commission.

### Tips

- Get a written loan estimate and compare the APR, not just the interest rate.
- Include property tax, insurance, HOA fees and maintenance in your monthly budget.
- A larger down payment lowers the payment and can remove mortgage insurance.
- Rates change daily – use a current quote for the most accurate result.

### Common mistakes to avoid

- Looking only at the monthly payment instead of the total cost of the loan.
- Forgetting closing costs and fees.
- Assuming home prices always rise.

### Inputs explained

FieldWhat to enterAreaUnits: ft², m²Base rental rate (per ft² per year)Amount in your currencyOperating expenses (per ft² per year)Amount in your currencyLease durationIn yearsAnnual rent escalationIn %Agent commission (% of total base rent)In %

### What each result means

- **Total rental rate (per ft² per year)** = [Base rental rate (per ft² per year)] + [Operating expenses (per ft² per year)]
- **Rent – first year** = [Area]×([Base rental rate (per ft² per year)] + [Operating expenses (per ft² per year)])
- **Rent – first month** = [Rent – first year]÷12

### Example values

How the main result changes when **Area** changes and everything else stays at the example values above:

Area (ft²)Rent – first year1,50061,5002,25092,2503,000123,0003,750153,7504,500184,5006,000246,000

## Worked example

Inputs — Area: 3,000 ft²; Base rental rate (per ft² per year): $32; Operating expenses (per ft² per year): $9; Lease duration: 5 years; Annual rent escalation: 3 %; Agent commission (% of total base rent): 5 %.

Results — Total rental rate (per ft² per year) = $41.00; **Rent – first year = $123,000.00**; Rent – first month = $10,250.00; Total rent over the lease = $644,677.04; Agent commission = $25,483.85.

## FAQ

**How is commercial rent calculated?**
Area × rent per square foot per year.

**What is a triple-net lease?**
The tenant pays base rent plus taxes, insurance and maintenance.

**Who pays the broker?**
Usually the landlord, as a percentage of the total lease value.

**What formula does the Commercial Lease Calculator use?**
Total rental rate = base rent + operating expenses (per ft² per year).