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Commercial Rent Calculator
Convert a commercial rent quote into real numbers. Enter the square footage, the base rent per square foot per year or per month, NNN or CAM charges and the yearly escalation to see monthly and annual rent, a year-by-year schedule and the total cost of the lease.
Last updated:
Space & rate
sq ft
$/ sq ft
$/ sq ft
Taxes, insurance and common-area maintenance. 0 for a gross lease.
Lease terms
years
%
months
%
Enter your values to see the result.
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How to use the Commercial Rent Calculator
- Enter the rentable square footage and whether rates are quoted per year or per month.
- Enter the base rent per square foot and any NNN or CAM charges per square foot.
- Set the lease term and the annual escalation, plus any free-rent months.
- Press Calculate rent to see monthly and annual rent and the full schedule.
Commercial rent formulas
- Annual base rent = rentable sq ft × base rent per sq ft per year
- Annual NNN / CAM = rentable sq ft × NNN charges per sq ft per year
- Monthly rent = (annual base rent + annual NNN) ÷ 12
- Rate in year n = year-1 rate × (1 + escalation)n − 1
- Per month to per year: monthly rate × 12
Example: 2,500 sq ft at $28 base + $8 NNN is $36 × 2,500 = $90,000 a year, or $7,500 per month. With 3% yearly base rent increases over 5 years, total base rent is about $371,639 and NNN charges are $100,000.
Monthly rent at common rates
| Rate (per sq ft per year) | 1,000 sq ft | 2,500 sq ft | 5,000 sq ft | 10,000 sq ft |
|---|---|---|---|---|
| $12 | $1,000 | $2,500 | $5,000 | $10,000 |
| $20 | $1,667 | $4,167 | $8,333 | $16,667 |
| $30 | $2,500 | $6,250 | $12,500 | $25,000 |
| $40 | $3,333 | $8,333 | $16,667 | $33,333 |
| $60 | $5,000 | $12,500 | $25,000 | $50,000 |
Frequently asked questions
How is commercial rent calculated?
Annual rent = rentable square feet × rent per square foot per year. Monthly rent = annual rent ÷ 12. For 2,500 sq ft at $28 per sq ft per year, annual base rent is $70,000, or $5,833.33 a month.
What are NNN and CAM charges?
In a triple net (NNN) lease the tenant pays a share of the property's taxes, insurance and common area maintenance (CAM) on top of base rent. These are usually quoted per square foot per year and adjusted each year to actual costs.
Is the rate per year or per month?
In the US most commercial rents are quoted per square foot per year, but some markets, especially for retail or in California, quote per month. A $2.25 per sq ft per month rate equals $27 per sq ft per year. Choose the right basis in the calculator.
How do annual escalations work?
A fixed escalation raises the base rent by a set percentage each lease year, compounding. At 3%, a $28 rate becomes $28.84 in year 2 and about $31.51 in year 5.
What is rentable vs usable square footage?
Usable area is the space you occupy. Rentable area adds your share of common areas such as lobbies and corridors, so it is larger. Rent is normally charged on rentable square feet.
How does free rent affect the total?
Free rent months, often offered as a leasing incentive, waive base rent at the start of the lease. Tenants usually still pay NNN charges during that time. The calculator shows the effective rent averaged over the whole term.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.
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