NAI Long Island — Tools & Resources
Online Commercial Occupancy Cost Calculator
How to Use the Occupancy Cost Calculator
Understanding the true cost of occupying commercial space is essential for tenants, business owners, and their advisors. While base rent is the most visible number in a lease, the total occupancy cost includes triple net charges, operating expenses, and one-time move-in costs that can significantly exceed the headline rent figure.
The Total Occupancy Cost Formula
To estimate the full cost of tenancy, our occupancy cost calculator uses the following approach:
(Base Rent + NNN Charges + Operating Expenses) × Lease Term − Rent Abatement + Security Deposit + Tenant Improvement Cost = Total Occupancy Cost
For example, if a tenant leases 5,000 RSF at $28.00 PSF in base rent with $11.50 PSF in combined NNN and operating expenses over a 5-year term with 3% annual escalations, the gross occupancy cost exceeds $990,000 — a number far higher than the base rent figure alone suggests.
Key Factors That Affect Occupancy Cost
Several variables can influence the total cost you see in the occupancy cost calculator:
- Lease Term: Longer leases increase total cost but may yield better concessions such as free rent periods or a landlord-funded tenant improvement allowance.
- NNN Charges: Triple net leases pass real estate taxes, CAM, and property insurance through to the tenant on a pro-rata basis. These vary widely by property type and location on Long Island.
- Annual Escalations: Rent escalations compound over time. A 3% annual increase on a 10-year lease raises base rent by more than 30% by the final year.
- Rent Abatement: Free rent periods reduce the effective total cost. The calculator applies abatement to the base rent component at the start of the lease term.
- Operating Expenses: Utilities and janitorial costs are entered on a per-square-foot annual basis and held constant throughout the lease term.
- Tenant Improvements: If the tenant is contributing out-of-pocket toward build-out beyond the landlord’s TI allowance, entering a PSF figure ensures it is captured in the Total All-In Cost.
Why Use an Occupancy Cost Calculator?
Using a professional occupancy cost calculator gives tenants and their brokers a complete picture of the financial commitment before signing a lease. Whether you are comparing multiple spaces across Long Island or stress-testing your budget against escalating rents, knowing the all-in number helps you negotiate from a position of clarity.
Enter your deal details below and the results update automatically. When your analysis is complete, print or save a one-page PDF report.
01
Lease Parameters
Leased Area
The rentable square footage (RSF) of the space being leased. All per-square-foot inputs are multiplied by this figure to calculate annual dollar amounts.
The rentable square footage (RSF) of the space being leased. All per-square-foot inputs are multiplied by this figure to calculate annual dollar amounts.
Lease Start
The commencement date of the lease. This appears on the printed report for reference.
The commencement date of the lease. This appears on the printed report for reference.
Lease Term
Total length of the lease in months. Enter 60 for a 5-year lease, or 120 for a 10-year lease.
Total length of the lease in months. Enter 60 for a 5-year lease, or 120 for a 10-year lease.
Final Partial Year
If the lease does not end on a full year boundary, enter the number of remaining months. Enter 4 for a 4-month stub period, or 0 if the lease ends on a complete year.
If the lease does not end on a full year boundary, enter the number of remaining months. Enter 4 for a 4-month stub period, or 0 if the lease ends on a complete year.
Rent Abatement
Number of free-rent months included in the deal. Enter 0 if no abatement applies.
Number of free-rent months included in the deal. Enter 0 if no abatement applies.
Annual Escalation Rate
Percentage by which base rent and NNN charges increase each year. Enter 3 for 3% annual escalations. Enter 0 for a flat, non-escalating lease.
Percentage by which base rent and NNN charges increase each year. Enter 3 for 3% annual escalations. Enter 0 for a flat, non-escalating lease.
02
Rent Components
Base Rent Rate
Annual base rent per square foot. Enter the dollar amount only — for example, enter 28 for $28.00 PSF/year.
Annual base rent per square foot. Enter the dollar amount only — for example, enter 28 for $28.00 PSF/year.
RE Tax Pass-Through
Real estate tax pass-through per square foot per year, if applicable. Enter 0 if taxes are included in the base rent (gross lease).
Real estate tax pass-through per square foot per year, if applicable. Enter 0 if taxes are included in the base rent (gross lease).
CAM Charges
Common area maintenance charges per square foot per year. Enter 0 if CAM is included in the base rent.
Common area maintenance charges per square foot per year. Enter 0 if CAM is included in the base rent.
Property Insurance
The tenant’s pro-rata share of building insurance per square foot per year. Enter 0 if insurance is included in the base rent.
The tenant’s pro-rata share of building insurance per square foot per year. Enter 0 if insurance is included in the base rent.
03
Operating Expenses
Utilities
Annual utility cost (electric, gas, water) per square foot. The default of $3.75 PSF/yr reflects a typical Long Island commercial utility burden. Adjust based on the specific building and use type.
Annual utility cost (electric, gas, water) per square foot. The default of $3.75 PSF/yr reflects a typical Long Island commercial utility burden. Adjust based on the specific building and use type.
Janitorial / Cleaning
Annual janitorial and cleaning cost per square foot. Enter 0 if janitorial services are included in the CAM charges or provided by the landlord.
Annual janitorial and cleaning cost per square foot. Enter 0 if janitorial services are included in the CAM charges or provided by the landlord.
04
One-Time Costs
Security Deposit OPTIONAL
The full security deposit amount required at lease execution. Added to the net occupancy cost to arrive at the Total All-In Cost. Leave at 0 if no deposit is required.
The full security deposit amount required at lease execution. Added to the net occupancy cost to arrive at the Total All-In Cost. Leave at 0 if no deposit is required.
Tenant Improvement Cost OPTIONAL
The tenant’s out-of-pocket contribution toward build-out beyond the landlord’s TI allowance, entered as a per-square-foot figure. The total dollar amount is calculated automatically by multiplying the PSF figure by the leased area. Leave at 0 if the landlord’s TI allowance covers all build-out costs.
The tenant’s out-of-pocket contribution toward build-out beyond the landlord’s TI allowance, entered as a per-square-foot figure. The total dollar amount is calculated automatically by multiplying the PSF figure by the leased area. Leave at 0 if the landlord’s TI allowance covers all build-out costs.
05
Reading the Results
Once all fields are filled in, the Results bar displays five summary figures:
| Field | Description |
|---|---|
| Gross Lease Value | The sum of all base rent, NNN charges, and operating expenses over the full lease term, before abatement is applied. |
| Net Occupancy Cost | Gross lease value minus the value of any rent abatement. This is the actual recurring cost paid over the lease term. |
| Avg. Monthly | Net occupancy cost divided by the total number of lease months — the true average monthly all-in cost, accounting for escalations and abatement across the full term. |
| Effective Rent PSF | Net occupancy cost expressed as an annualized per-square-foot figure. Useful for comparing spaces of different sizes on a consistent basis. |
| Total All-In Cost | Net occupancy cost plus the security deposit and tenant improvement contribution. Represents the complete financial commitment of the tenancy. |
06
Year-by-Year Schedule
The table below the Results bar shows a full occupancy cost breakdown for every year of the lease:
| Column | Description |
|---|---|
| Period | Each full lease year, numbered sequentially. A Final Partial row appears if the lease term includes a stub period. |
| Base Rent | Annual base rent for that year after escalation has been applied. |
| NNN Charges | Combined annual RE tax, CAM, and insurance charges for that year, escalated accordingly. |
| OpEx | Annual operating expenses (utilities + janitorial) for that year. These are held constant and not subject to escalation. |
| Abatement | The free-rent credit applied to that year, shown as a negative value in red. A dash (—) indicates no abatement in that year. |
| Net Occupancy Cost | Base Rent + NNN Charges + OpEx minus Abatement — the total amount payable for that year. |
| Esc. % | The escalation rate applied to that year’s rent and NNN charges. A dash (—) indicates no escalation in Year 1. |
| Avg Monthly | Net occupancy cost for that year divided by 12 (or by stub months for a partial year). The Totals row at the bottom shows the sum across all years, highlighted in green. |
07
Printing & Saving as PDF
To Print or Save a PDF Report
1
Complete all fields and confirm the results are correct.
Complete all fields and confirm the results are correct.
2
Click the Print / Save PDF button in the top-right corner of the calculator.
Click the Print / Save PDF button in the top-right corner of the calculator.
3
A clean one-page report opens in a new window and the print dialog appears automatically.
A clean one-page report opens in a new window and the print dialog appears automatically.
4
To save as a PDF, select Save as PDF (or Microsoft Print to PDF) from the printer destination dropdown.
To save as a PDF, select Save as PDF (or Microsoft Print to PDF) from the printer destination dropdown.
5
Click Save and choose a location on your computer.
Click Save and choose a location on your computer.
⚠ Pop-up blocker: The report opens in a new browser window. If the print dialog does not appear, look for a pop-up blocked notification in your browser’s address bar, click it to allow pop-ups from this page, then click Print / Save PDF again.
Have questions about a specific property or need help evaluating occupancy costs for a Long Island space? Contact NAI Long Island →