Total Lease Exposure Calculator

Calculate your full financial exposure under a commercial lease, including base rent, CAM charges, insurance, escalations, and personal guaranty risk over the entire lease term.

$

Your base monthly rent in year 1 before escalations

years

Total length of the lease in years

%

Annual percentage increase in base rent (0 if fixed rent)

$

Monthly common area maintenance and operating expense charges

$

Required tenant liability and property insurance per month

$

One-time deposit paid upfront and held by landlord

A personal guaranty puts your personal assets on the hook if the business can't pay

Total Lease Obligation

Total Base Rent

Total CAM

Year 1 Monthly All-In

Final Year Monthly All-In

Personal Guaranty Exposure

Enter your numbers to see results.
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How This Calculator Works

Frequently Asked Questions

Why does my total lease exposure look so much higher than my monthly rent?
Because most tenants focus on monthly rent and ignore the full picture. Over a 5-year lease at $5,000/month with 3% escalations, $800/month CAM, and $200/month insurance, your total exposure exceeds $400,000. Adding a personal guaranty means that entire amount is on the line with your personal assets.
What costs does this calculator not include?
This calculator does not include utilities, tenant improvement costs, property taxes (if billed separately), after-hours HVAC charges, parking fees, or the cost of your own improvements and equipment. The true all-in cost of occupying commercial space is typically 20-40% higher than base rent alone.
How do I reduce my personal guaranty exposure?
Negotiate a 'burn-down' guaranty that reduces your personal exposure over time as you demonstrate you are a reliable tenant. A common structure: full guaranty for year 1, reducing by 20% per year so there is no personal exposure in year 6. You can also try to limit the guaranty to a fixed dollar amount or a fixed number of months rather than the full lease term.

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