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9 Free Commercial Lease Tools

9 free tools for commercial tenants. Verify CAM reconciliation math, estimate overcharges, check NNN costs, and download a free reconciliation template.

Average overcharge across 7 documented public-record cases: $21,900

Most Used

Calculator

CAM Reconciliation Checker

Catch arithmetic errors on your year-end CAM reconciliation statement.

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Calculator

Gross-Up Calculator

Calculate gross-up for payroll or CAM expenses in seconds.

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Calculators

Calculator

Pro Rata Share Calculator

Verify your landlord's pro-rata share math in seconds.

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Calculator

Percentage Rent Calculator

Verify your percentage rent calculation and detect overpayments.

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Calculator

NNN Lease Calculator

Calculate your true all-in NNN lease cost including CAM, tax, and insurance.

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Calculator

Rent Escalation Calculator

Project rent escalations over your lease term with fixed or CPI-based increases.

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Calculator

Multi-Year Recovery Calculator

See how CAM overcharges compound across your full lookback window.

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Assessment & Download

Estimation

CAM Overcharge Estimator

Estimate your annual CAM overcharge in under fifteen minutes.

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Email required

CAM Reconciliation Template

Free Excel template for reviewing your CAM reconciliation statement.

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Already suspect an overcharge?

Skip the calculators. Upload your lease and reconciliation for a forensic audit in under 15 minutes.

Find My Overcharges

Not sure yet? See what the audit actually finds

The calculators help you estimate. The full audit checks your real documents, shows the total overcharge before payment, and lets you compare the report format first.

See a sample reportWhat a full CAM audit includes

Frequently Asked Questions

Are these tools really free?
Yes, every calculator and template on this page is free to use, no account required. They are designed to help you spot red flags in your CAM charges in under fifteen minutes. If a tool flags a potential issue, CAMAudit’s full forensic audit digs into your actual lease and reconciliation documents, runs all 14 detection rules automatically, and generates a dispute letter draft. The scan starts free and shows you the total overcharge amount before you pay anything.
How accurate is the CAM Overcharge Estimator?
The estimator uses industry benchmark overcharge rates per lease type — it gives you a plausible range based on what tenants in similar situations typically recover. For an exact number, you need CAMAudit to run against your actual documents.
What is CAM reconciliation and why does it matter?
CAM reconciliation is the year-end process where your landlord compares estimated payments you made throughout the year against actual operating expenses. Errors in the math, pro-rata share calculation, or expense categorization can result in overcharges that go uncontested.
What does the CAM Reconciliation Template include?
The free Excel template includes worksheet tabs for tenant share calculation, variance analysis, and exclusion tracking. It mirrors the reconciliation review process used during a forensic audit, so you can work through your own statement systematically.
How is CAMAudit different from these free tools?
The free tools give you estimates and math checks based on inputs you enter. CAMAudit processes your actual lease and reconciliation statements with AI extraction and 14 deterministic detection rules — finding dollar amounts in your specific documents, not benchmarks.
Free scan · No account required

Check your landlord's math

Upload two PDFs. 14 detection rules. Under 15 minutes. Free.

Find My OverchargesSee a sample report first

Need to reconcile CAM charges from the landlord side?

CapVeri.com automates CAM reconciliation for property managers: CSV/PDF import, BOMA calculations, and tenant share allocation without expensive integrations.

Go to capveri.com
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Forensic CAM audit software for commercial tenants. Find the money you're owed.

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Related Tools

  • Lextract: Lease Abstraction (opens in new tab)
  • CapVeri: CRE FinOps (opens in new tab)

Recovery of past CAM overcharges depends on your specific lease terms, including any audit rights deadlines or ‘binding and conclusive’ provisions, and on applicable state law.

State statute of limitations periods apply to written contracts and range from 3 to 10 years. Your actual lookback window may be shorter based on your lease.

CAMAudit is a document analysis platform, not a law firm, and nothing on this site constitutes legal advice. Consult a licensed real estate attorney before initiating any dispute or legal proceeding.

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