Commercial Lease Type Comparison Calculator

About the Commercial Lease Type Comparison Calculator

Commercial leases come in several structures, each with different cost implications. A gross (full service) lease includes all operating expenses in the quoted rent. A NNN (triple net) lease quotes a lower base rent but passes taxes, insurance, and CAM to the tenant. A modified gross lease falls in between, including some but not all expenses.

Comparing these directly is essential because a $30/sq ft gross lease may actually be cheaper than a $20/sq ft NNN lease once you add $12/sq ft in NNN charges. This calculator standardizes the comparison by computing the total all-in cost for each lease type.

Understanding these structures is critical for tenants negotiating office, retail, or industrial leases. The "cheapest" advertised rate is meaningless without knowing what's included.

Homebuyers, investors, and real-estate professionals all benefit from precise commercial lease type comparison figures when evaluating properties, negotiating deals, or planning long-term investment strategies. Save this calculator and revisit it whenever market conditions or your financial situation changes.

When This Page Helps

Different lease types make apples-to-apples comparison impossible without a calculator. This calculator normalizes all structures to a single all-in cost per square foot, revealing the true winner.

How to Use the Inputs

1. Enter your unit's square footage.
2. Enter the quoted rate for each lease type you're comparing.
3. For NNN, enter the estimated NNN charges per sq ft.
4. For modified gross, enter the tenant's share of expenses.
5. View the total cost side by side for each lease structure.
6. Choose the structure with the lowest all-in cost (or best risk profile).

Example Calculation

Tips & Best Practices

• NNN leases have variable costs that can increase annually — factor in 3–5% annual growth.
• Gross leases give cost certainty, which simplifies budgeting for small businesses.
• Ask for a detailed expense breakdown even in gross leases so you know the hidden components.
• Modified gross leases let you negotiate exactly which expenses you take on.
• Industrial and retail leases are overwhelmingly NNN; office leases are more commonly gross or modified gross.
• Consider the risk profile: NNN has cost uncertainty, gross has cost certainty but a higher base.

Lease Types at a Glance

Gross leases dominate Class A office markets. NNN leases dominate retail and industrial. Modified gross is common in suburban office parks and mixed-use buildings. Each has its place, and the "best" type depends on your industry, cash flow predictability needs, and negotiation leverage.

The Hidden Cost of Certainty

Gross leases include a risk premium. Landlords price in expected expense increases plus a buffer. Over a 5-year term, a NNN lease may save 5–15% total compared to gross because you pay actual expenses rather than the landlord's inflated estimates.

Long-Term Considerations

Over a 10-year lease, NNN expense growth (3–5%/year) can significantly increase your occupancy cost. A $12/sq ft NNN cost in year 1 could reach $16–$19/sq ft by year 10. Gross leases with fixed escalations (2–3%/year) provide better long-term predictability.

Frequently Asked Questions

• What is a gross (full service) lease?

  A gross lease includes property taxes, insurance, and maintenance in the quoted rent. The tenant pays one predictable amount. The landlord assumes the risk of operating expense increases. Common in office buildings.

• What is a modified gross lease?

  A modified gross lease includes some operating expenses in the base rent (often taxes and insurance) but passes others to the tenant (often CAM or utilities). It's a compromise between gross and NNN, common in multi-tenant office buildings.

• Which lease type is best for tenants?

  It depends on your risk tolerance. Gross leases provide budget certainty. NNN leases often have the lowest total cost but expose you to expense fluctuations. Modified gross is a middle ground. Compare the all-in cost for your specific situation.

• Can I negotiate the lease type?

  Sometimes. In a tenant's market, you may be able to convert a NNN proposal to gross at a reasonable premium. Landlords may also offer modified gross structures with expense stops to limit your exposure.

• What is a base year stop?

  In a gross lease with a base year stop, the landlord includes operating expenses at the base year level but passes through any increases in subsequent years. This hybrid structure is common in multi-year office leases.

• How do percentage leases differ?

  A percentage lease, common in retail, charges base rent plus a percentage of the tenant's gross sales above a breakpoint. This aligns the landlord's income with the tenant's success and is most common in shopping centers.