Financial

CPI Adjustment

A rent escalation mechanism that ties rent increases to changes in the Consumer Price Index, adjusting the tenant's rent periodically in line with measured inflation.

Extended Definition

CPI adjustments are common in long-term leases as an alternative to fixed step increases. The lease must specify which CPI index to use (e.g., U.S. All Urban Consumers, Los Angeles MSA), the base period, the frequency of adjustment, and any caps or floors. For example, a lease might cap annual CPI increases at 4% and floor them at 2%. Without a cap, tenants face unlimited exposure in high-inflation environments. Tenants should also verify the lag period — CPI data is typically published with a one- to two-month delay, so many leases use a lookback period for calculation.

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