Rent Escalation Calculator: Fixed, CPI, and Percentage Increases
How to calculate commercial lease rent escalations for fixed annual increases, CPI adjustments, and percentage rent. With worked examples.
By Angel Campa, Founder · Updated March 2026 · Saves 1–3 hours per lease
Building a forward-looking rent schedule requires extracting each escalation trigger, rate, and effective date from the lease — data that is often spread across multiple sections and exhibits. Manually assembling a multi-year rent schedule for a portfolio of leases is error-prone and time-consuming.
Upload executed lease PDFs for all tenants whose escalation schedules you need to model.
Lextract identifies each rent step: fixed dollar amounts, fixed percentage escalations, CPI adjustments, and any base rent table from a rent schedule exhibit.
CPI clauses are complex — review the extracted base CPI index, cap, and floor values carefully.
Export the extracted rent data as an Excel file with separate rows for each escalation period, amount, and effective date.
Use the extracted escalation data to build a year-by-year rent projection for each tenant. Aggregate to property level for asset management and reporting purposes.
Learn about the full integration between Lextract and Microsoft Excel, including supported export formats and critical fields.
View Microsoft Excel integration →Lextract processes the entire document including exhibits. If the rent schedule is provided as a table in an exhibit, Lextract extracts each row and period as a structured escalation step.
Yes. Lextract extracts percentage rent provisions including the natural breakpoint or artificial breakpoint, the applicable rate, and whether percentage rent is in addition to or in lieu of base rent.
How to calculate commercial lease rent escalations for fixed annual increases, CPI adjustments, and percentage rent. With worked examples.
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.
Compare the top AI lease abstraction tools for commercial real estate in 2026. We review Lextract, Prophia, Kolena, Leasecake, MRI Software, and more — with pricing, accuracy, and use-case guidance.
Upload your lease PDF and get 125+ structured fields ready to import into Microsoft Excel. Just $20 per lease — no subscription required.
Start Extracting — $20/lease