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Common Area Maintenance Calculator
CAM (Common Area Maintenance) covers shared building costs — landscaping, parking lot maintenance, security, common-area utilities, snow removal, and the admin overhead managing it all. Tenants pay their pro-rata share plus an admin fee, often subject to an annual cap that limits how fast the per-SF charge can rise. This calculator computes the full annual and monthly CAM billing including the cap test.
Cleaning, landscape, security, utilities common areas
Tenant cap on annual CAM growth
Annual CAM billing to tenant
$12,936
Monthly CAM billing
$1,078
CAM / SF (uncapped)
$2.40
CAM / SF (capped)
$2.31
Pro-rata share %
6.67%
Admin fee
$1,386
How the math works
CAM (Common Area Maintenance) covers shared building costs — landscaping, parking lot, security, common-area utilities, and management. It's billed pro-rata based on tenant SF / total SF, plus an admin fee of 10-15%.
Tenants negotiate annual CAM caps (typically 5-7% YoY) to limit landlord cost pass-through. 'Controllable' caps exclude utilities and taxes from the cap.
EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.
Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.
Learn more about our review process on the EveryCalc methodology page.
How this calculator works
What this page estimates
This Common Area Maintenance Calculator is built to give a quick, browser-based estimate for common area maintenance. CAM (Common Area Maintenance) covers shared building costs — landscaping, parking lot maintenance, security, common-area utilities, snow removal, and the admin overhead managing it all. Tenants pay their pro-rata share plus an admin fee, often subject to an annual cap that limits how fast the per-SF charge can rise. This calculator computes the full annual and monthly CAM billing including the cap test. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.
Calculation approach
The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.
Example workflow
For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.
Practical checks
- Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
- Run a low, base, and high case when the inputs are estimates.
- Check the related calculators below when the next decision depends on a different assumption.
How to interpret the common area maintenance result
Best use
Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.
Cross-check
Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.
Watch for
Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.
This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.
Before relying on this common area maintenance estimate
Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.
Confirm source numbers
Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.
Separate cash flow from total cost
A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.
Run conservative cases
Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.
Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.
How to Use
- Enter total annual CAM expenses, total rentable SF, and tenant SF.
- Enter admin fee % (typically 12-15%).
- Enter the annual CAM cap % and the prior-year CAM/SF baseline.
- Read the annual and monthly CAM billing (capped) to the tenant.
Frequently Asked Questions
What's a controllable CAM cap?
A cap that excludes utilities, taxes, insurance, and snow removal from the YoY growth limit. Tenant-friendly leases use it to limit landlord-controlled cost growth (admin, landscape, security).
Are taxes and insurance in CAM?
Sometimes, depending on lease structure. NNN leases break them out separately. Modified gross often bundles them in CAM.
Can tenants audit CAM?
Yes — most leases give tenants 6-12 months to audit landlord books. Errors over 3-5% require landlord to pay audit cost and refund overcharges.
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