Cumulative caps bank unused increases for future use, allowing large catch-up spikes. Non-cumulative caps expire unused amounts, keeping increases predictable every year.
A cumulative cap allows the landlord to carry forward unused cap increases from years when actual expenses grew less than the cap rate. If a 5% cap is in place and expenses only grew 2%, the landlord banks the unused 3% and can apply it in a future year, allowing a larger increase later.
A non-cumulative cap limits the annual increase to a fixed percentage each year with no carryforward. Unused cap amounts expire at year-end. If the cap is 5% and expenses grew only 2%, the other 3% is gone. Next year's increase is still limited to 5% over the prior year's actual amount.
| Dimension | Cumulative Cap | Non-Cumulative Cap |
|---|---|---|
| Unused cap increases | Carried forward for future use | Expire, not carried forward |
| Maximum single-year increase | Cap rate plus banked amounts | Always limited to the stated cap rate |
| Long-term protection | Erodes as banked amounts accumulate | Consistent protection every year |
| Negotiation difficulty | Easier, landlords accept more readily | Harder, landlords resist losing recapture |
| Best for | Short-term leases where banking has limited time | Long-term leases where compounding matters most |
Cap type directly affects how much CAM can increase in any given year. Cumulative caps can produce large catch-up increases that surprise tenants who expected steady, capped growth. Non-cumulative caps provide consistent protection. When auditing, verify not only the cap rate but also whether the landlord is correctly applying the cumulative or non-cumulative methodology specified in your lease.
Cumulative caps are worse for long-term tenants because the banked amounts compound. On a 10-year lease with a 5% cumulative cap, if expenses grew only 2% for three consecutive years, the landlord has banked 9% of catch-up capacity. A single year where costs spike could result in a 14% increase that is technically within the cap. Non-cumulative caps prevent this scenario entirely.
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Find My OverchargesThis page provides general educational information. It is not legal advice and may not reflect the most current law in your state. Consult a licensed attorney for advice specific to your situation.
