AI Lease Abstraction Accuracy: Benchmarks and What to Expect
What accuracy can you realistically expect from AI lease abstraction tools? We break down field-level accuracy rates, where AI excels, where it struggles, and how to validate output.
The methodology used to increase rent over the term.
By Angel Campa, Founder · Updated March 2026
The escalation type determines how quickly rent grows over the lease term and how predictable future costs will be. A 3% fixed annual escalation on a 10-year lease increases rent by 34% over the term. CPI-linked escalations introduce uncertainty, as inflation spikes can cause unexpected cost increases. Identifying the escalation type is essential for accurate financial modeling and straight-line rent calculations under ASC 842.
Found in the "Rent Adjustments," "Escalations," or "Annual Increases" section. May be embedded within the rent schedule exhibit. Look for terms like "fixed percentage," "CPI," "step-up," or "fair market value."
Lextract uses a combination of AWS Textract OCR and Claude AI to identify and extract the escalation type from your lease PDF. The AI searches for all pages of the document, then assigns a confidence score based on OCR quality and extraction certainty. Fields with lower confidence are flagged for human review.
Annual Base Rent
The total base rent payable for the first full lease year.
Payment Frequency
The interval at which rent is due.
Fixed Escalation %
The static percentage by which rent increases annually, if applicable.
CPI Index Used
The specific inflation index utilized for variable escalations.
Percentage Rent Rate
The percentage of gross sales payable to the landlord.
Breakpoint Amount
The gross sales threshold that triggers percentage rent obligations.
The three primary types are: (1) Fixed percentage increases (e.g., 3% per year), (2) CPI/inflation-linked adjustments, and (3) Fixed dollar step-ups (e.g., $1/RSF per year). Some leases use fair market value resets at renewal or combine multiple methods.
Fixed percentage or fixed dollar escalations provide cost certainty, which most tenants prefer. CPI-linked escalations with a cap and floor offer moderate protection. Open-ended CPI escalations without caps can result in significant cost spikes during inflationary periods.
What accuracy can you realistically expect from AI lease abstraction tools? We break down field-level accuracy rates, where AI excels, where it struggles, and how to validate output.
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