CAM reconciliation software that reads your leases
Defensible CAM reconciliation depends on the lease terms: base year, pro-rata share, caps, gross-up, and the long list of exclusions. Leaseabstracts extracts the operating-expense provisions from each lease so your true-ups are built on what the tenant actually agreed to.
Last updated July 2026
CAM / OPEX
What gets extracted
CAM disputes come from reconciliations that do not match the lease. Pulling the terms straight from each lease is the foundation of a true-up that holds up.
The six lease terms every CAM reconciliation depends on
A reconciliation is arithmetic applied to lease language. Get the language wrong and the math is irrelevant. These six terms decide the bill:
| Term | What it controls |
|---|---|
| Base year or expense stop | The expense level the landlord absorbs before anything passes through |
| Pro-rata share | Tenant area over the correct denominator, which is not always total building area |
| Cap on controllable expenses | The ceiling on year-over-year increases, and whether it compounds |
| Gross-up | Whether variable costs are grossed up to a stated occupancy, usually 95 to 100 percent |
| Exclusions | Capital items, ownership costs, leasing commissions, and anything else the lease carves out |
| Audit rights | The window and process for the tenant to demand backup and dispute |
These live in different articles of the lease and are frequently modified by amendment, which is why a reconciliation built from the original lease alone is often wrong. The full method is in the CAM reconciliation guide, and CAM charges explained covers what the charges are.
Cumulative vs non-cumulative CAM caps
The cap type changes the number materially and the two are easy to confuse. A non-cumulative cap limits each year independently: if the cap is 5 percent and expenses rise 8 percent, the tenant pays a 5 percent increase and the unused 3 percent is lost to the landlord permanently. A cumulative cap lets unused headroom carry forward: a year in which expenses rise only 2 percent banks 3 percent that a later year can draw on.
Then there is compounding. A compounding cap applies the percentage to the prior year's capped amount, so the ceiling itself grows; a non-compounding cap applies it to the base year every time, which is far more protective of the tenant. Combinations exist, and "5 percent cumulative compounded" is a very different obligation from "5 percent per year."
Read the cap clause and record the type, the percentage, the base it applies to, and whether it covers all expenses or only controllable ones. Taxes, insurance, utilities, and snow removal are usually excluded from the cap as uncontrollable. Our guide to CAM caps works the arithmetic through a full ten year term and lists the seven settings an abstract has to capture.
Where landlords and tenants most often disagree
In practice, reconciliation disputes cluster in five places:
- Capital versus repair. A roof replacement billed as maintenance. Most leases either exclude capital items outright or require amortization over useful life.
- Gross-up mechanics. In a partly occupied building, failing to gross up variable costs overstates the per-tenant share for those who are in occupancy.
- Management fees. Charged as a percentage of gross receipts including recoveries, which recovers a fee on the fee.
- The denominator. Pro-rata share calculated on leased area rather than total rentable area, quietly shifting vacancy cost to occupied tenants.
- The cap applied wrongly, most often treating a cumulative cap as annual.
Each of these is a lease-language question first. Tenants pursuing recovery should read lease audit; landlords should make sure the statement can be traced to a clause before it goes out.
Getting the terms out of the leases at portfolio scale
For a single lease, a careful read works. For a shopping center or an office portfolio, re-reading every lease before each annual true-up is the reason reconciliations run late and get contested.
Leaseabstracts extracts the six terms above from every lease and amendment into one consistent grid, each field linked to the clause and page it came from. When a tenant challenges a line, the clause is one click away rather than a two-hour search. Property teams typically pair it with rent schedule extraction and a rent roll so the recovery terms and the rent sit in the same file. See how property managers run it.
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Who uses this
Lease abstraction services: commercial lease abstracting services from a US lease abstraction company
FOR PROPERTY MANAGERSLease abstraction for property managers
FOR LANDLORDSLease abstraction for landlords
FOR BROKERSLease abstraction for brokers
FOR LAW FIRMSLease abstraction for law firms
FOR TENANTSLease abstraction for tenants
FAQ
Common questions
What CAM terms does it extract?
Base year, pro-rata share, caps, gross-up, exclusions, and audit rights, each source-linked to the lease clause.
Does it perform the reconciliation?
It extracts the terms you need to reconcile and verify. You run the true-up on a foundation of source-linked lease data.
What is the difference between a cumulative and non-cumulative CAM cap?
A non-cumulative cap limits each year on its own and any unused headroom is lost. A cumulative cap carries unused headroom forward, so a low-increase year creates room a later year can use. Whether the cap also compounds on the prior capped amount changes the ceiling again, so record type, percentage, and base.
What is a gross-up provision in CAM?
A gross-up adjusts variable operating expenses to what they would have been at a stated occupancy, commonly 95 or 100 percent, before allocating them. It protects tenants in a partly vacant building from absorbing more than their fair share and protects landlords from under-recovering in a base year set during low occupancy.
When are CAM reconciliations usually issued?
Most leases require the landlord to deliver the annual reconciliation statement within 90 to 180 days after the calendar or fiscal year end. The lease also sets how long the tenant has to object, often 60 to 120 days from receipt, after which the year is typically deemed final.
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