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A letter estimates next year. It is not the reconciliation. You’re sitting at your desk, pen hovering over the edge of the single-page commercial lease addendum you pulled last week to cross-reference common area maintenance charges. The crisp, unopened envelope from your property manager sits to your left, postmarked three days ago, and you already know the number inside will shift your operating budget for the coming 12 months. You pull the letter out, smooth it flat next to your lease, and get to work verifying every line before you update your projections.
Label Both Core CAM Estimate Lines
Every CAM estimate letter includes dozens of line items, but you only need to prioritize two core lines for your initial review: the total annual CAM charge the landlord is proposing for the coming year, and the maximum allowable CAM charge your signed lease permits for that same period. You write the date you received the estimate and the date you complete your review at the top of the page, so you have a clear timeline for any follow-up with your property manager. You draw a straight line down the margin of the estimate letter, and label the left column “Landlord Proposed CAM” and the right column “Lease Permitted CAM” to keep your comparisons clear as you work through each line item.
| Line Item | Landlord Estimate Value | Lease Allowed Value | Notes |
|---|---|---|---|
| Base CAM per square foot, current year | $18.20 | $18.20 | Matches last year’s final reconciliation amount |
| Proposed CAM per square foot, next year | $19.15 | $18.75 | Variance comes from unapproved capital expenditure pass-through |
| Total annual CAM charge, next year | $229,800 | $225,000 | $4,800 difference to flag with property management |
You fill in the right column directly from your lease terms, cross-referencing clauses that outline CAM caps, excluded expenses, and any pre-negotiated freezes on specific charges like parking lot maintenance or security services. Illustrative example: your 12,000 square foot office space has a negotiated 3% annual CAM cap, so even if the landlord’s estimate shows a 4.2% increase, you only owe the 3% capped amount. If your lease excludes capital improvements from CAM charges, you subtract any line items for roof replacements, lobby renovations, or new HVAC systems from the landlord’s proposed total to get to your final lease-permitted amount. You cross out any extraneous line items that don’t apply to your lease terms, and add short notes next to each exclusion linking to the specific lease clause that supports your adjustment.
Identify the Controlling Calculation for Billing
The landlord’s estimate is a projection, not a binding billing amount, so you always default to the terms of your signed lease to determine the controlling figure you will use for budget and payment purposes. This step eliminates confusion later when invoices arrive, and ensures you don’t accidentally budget for or pay charges you are not obligated to cover under your signed agreement. Follow these four steps to confirm and document the controlling figure:
- Pull the CAM section of your signed lease to cross-reference the full list of allowed pass-through expenses, annual increase caps, and any expense exclusions you negotiated during lease signing.
- Cross-check every line item in the landlord’s estimate against the allowed expense list to flag any ineligible costs, like property manager bonuses or marketing for vacant suites, that your lease does not require you to cover.
- Circle the final controlling CAM total on the estimate letter in bold red ink, and write “controlling billing figure” directly next to it so there is no room for confusion when you or your accounting team reference the document later.
- Draft a short, polite note to your property management contact outlining any discrepancies between the proposed estimate and your lease terms, and send it within 10 business days of receiving the estimate to align on billing expectations before invoices are issued.
Even if the property manager pushes back on some of your excluded line items, you keep the annotated estimate as is, and add any written responses from the property manager to your lease folder to reference later if needed. You share a copy of the controlling figure with your accounting team immediately, so they have the correct amount on file for budget updates and future invoice processing.
Store This Annotated Page With Your Core Lease Documents
A CAM estimate letter is useless if you can’t find it when you need it, so you store it in the same location as your most critical lease records immediately after you finish annotating it. You avoid tucking it into a random stack of utility bills or marketing flyers, because you will need to pull it multiple times over the next 18 months as invoices arrive and the end-of-year reconciliation is prepared. You keep a physical copy in your lease binder, tabbed with the relevant lease year and grouped with other CAM-related documents including past reconciliations, billing disputes, and written correspondence with your property manager. If you use Lease Jacket to organize your commercial lease records, upload a scanned copy of the annotated estimate letter to your property’s document folder, tagged with the relevant lease year so you can pull it up in seconds from any device, even if you are working remotely or off-site for a meeting. You also share a copy of the fully annotated estimate with your accounting team, so they have the full context for the controlling figure on file, reducing the chance of overpayment or delayed payment due to last-minute billing questions.
Reference This Annotated Letter When First Quarter CAM Invoices Arrive
The next time you open this specific page is when you receive your first quarter CAM invoice for the upcoming lease year, roughly 30 to 45 days after you first annotated the estimate. You pull the letter out immediately when the invoice hits your inbox, and compare the per-square-foot CAM charge on the invoice directly to the controlling figure you circled when you first reviewed the estimate. If the two numbers match, you forward the invoice to your accounting team for immediate processing, no extra research required. If the invoice uses the landlord’s original proposed number instead of your agreed-upon controlling figure, you attach a copy of the annotated estimate and the relevant lease clause to a short note to your property manager, asking them to issue a revised invoice that aligns with your signed lease terms. You also reference this document when you receive the mid-year CAM update from your property manager, to make sure actual expenses are tracking in line with your expected controlling figure, so you can adjust your operating budget early if unforeseen but allowed expenses are added to the CAM total. When the end-of-year CAM reconciliation arrives 90 days after the close of the lease year, you pull this estimate again to compare the final billed amount to both your initial projection and the controlling figure, to catch any last-minute discrepancies before you sign off on the reconciliation. This single annotated page cuts down the time you spend reviewing CAM charges for the full year by more than half, because you already did the bulk of the research and documentation when you first received the estimate.