Every year, commercial tenants receive a document that looks like an accounting statement and reads like one too. Numbers, categories, percentages, adjustments. Most tenants file it, write the check, and move on.
That habit is expensive. I built CAMAudit because CAM reconciliation statements contain errors in a significant share of properties, and those errors only get caught when someone actually reads the document carefully. This guide walks through what every section means, what the different formats look like, and — most importantly — which six things to check before you decide whether to pay.
40% of CAM reconciliations contain material billing errors (Tango Analytics / PredictAP, 2023)
What a Reconciliation Statement Is and Why You Receive It
Under most commercial leases — NNN, modified gross, or gross with CAM carve-outs — you pay operating expenses in one of two ways. Some leases require you to pay your share of actual monthly expenses as invoiced. More commonly, you pay estimated CAM charges throughout the year, and at year end the landlord reconciles those estimates against what was actually spent.
If actual expenses were higher than your estimates, you owe the difference. If they were lower, you should receive a credit or refund.
The reconciliation statement is the landlord's documentation of that true-up calculation. It arrives once a year, typically 60 to 120 days after the calendar year closes, though some leases specify a different fiscal period. The delivery date starts the clock on your dispute window — usually 90 to 180 days to formally challenge any line item.
The Five Standard Sections
The layout varies by property management software, but the underlying structure is consistent across Yardi, MRI, AppFolio, Buildium, and every other platform. Once you learn the five sections, you can navigate any format.
Section 1: Property Information and Tenant Share
This section identifies the property, the lease period covered, and your allocated percentage. The key number here is your pro-rata share — your rentable square footage divided by the total rentable square footage of the property or building.
It might be labeled "tenant share," "pro-rata factor," "allocated percentage," or simply your square footage over the denominator. Whatever the label, locate it and confirm two things: the numerator (your square footage) matches your lease, and the denominator (the total) matches what your lease defines as the denominator pool.
Some leases define the denominator as total leasable area. Others use total occupied area, or exclude anchor tenant space, or adjust for ground-floor versus upper-floor space. The definition is in your CAM exhibit. If the statement uses a different denominator than your lease specifies, every expense allocation on the statement is wrong.
Section 2: Expense Line Items by Category
This is the body of the statement — a list of every expense the landlord is attempting to allocate to tenants. Categories typically include:
- Janitorial and cleaning
- Landscaping and exterior maintenance
- Utilities (common area lighting, HVAC for common spaces)
- Property management fees
- Insurance premiums
- Security
- Repairs and maintenance
- Snow removal or seasonal services
- Administrative fees
The line item descriptions vary in specificity. Some statements give you enough detail to evaluate each item. Others list "general maintenance" as a single six-figure amount with no further breakdown. The latter is a problem — and your audit rights allow you to demand the backup invoices.
Section 3: Your Allocated Share Per Line
For each expense category, the statement shows your allocated share based on your pro-rata percentage. If the total landscaping cost was $80,000 and your share is 4.25%, you should see $3,400 allocated to you on that line.
The calculation is simple arithmetic. You can check it manually: multiply the total expense for each line by your stated share percentage. Any line where the allocated amount doesn't match that calculation represents either a clerical error or a different allocation methodology being applied — and you need to know which.
Section 4: Estimated Payments Already Made
This section shows the monthly CAM estimates you paid throughout the year, typically presented as a running total. The monthly estimate was set at the beginning of the year based on the prior year's actuals with some escalation factor.
Confirm this number against your payment records. It should match the sum of the CAM line items from your monthly invoices. If it doesn't, something was misapplied or recorded incorrectly, and the final balance calculation will be off.
Section 5: Balance Due or Credit
Subtract your estimated payments from your total allocated share of actual expenses. The result is either a balance due (you underpaid, based on the landlord's calculation) or a credit (you overpaid).
This is the number most tenants focus on — but it's the last thing to evaluate, not the first. The question isn't just whether the balance due is reasonable. The question is whether the total allocated share in section 3 was calculated correctly. A $1,200 balance due can be the correct result of accurate calculations or the net of multiple errors that happen to be offsetting each other.
What Yardi, MRI, and AppFolio Formats Look Like
Property management platforms use different labels for the same concepts, which creates unnecessary confusion.
Yardi statements typically use "NRA" (Net Rentable Area) for the denominator and "Pro Rata Factor" for your share percentage. The expense detail report is often a separate document from the reconciliation summary. If you receive only the summary, ask for the expense detail report.
MRI formats vary by version and how the landlord's team has configured templates. Some MRI outputs present expenses as a single consolidated total; others break out the GL account codes. If you see account codes without descriptions, ask for the chart of accounts mapping.
AppFolio statements, common in smaller properties and strip centers, tend to be less detailed than Yardi or MRI outputs. The expense categories may be collapsed into broader buckets. This isn't inherently a problem, but it means you need backup documentation to evaluate specific line items.
The core principle: different labels, same structure. Map whatever format you receive to the five sections above, and you can navigate it.
Six Things to Check Immediately
After orienting yourself in the statement, run through this checklist before paying anything.
1. Management Fee Rate
Find the management fee line. Calculate the effective rate by dividing the fee by the eligible expense base the landlord used. Compare that rate to what your lease caps the fee at — typically expressed as a percentage of gross revenues or total operating expenses, often 3-5%.
If the billed rate is higher than the lease cap, you have a management fee overcharge. If the base the landlord used to calculate the fee is larger than your lease permits — including items that should be excluded from the fee calculation — the overcharge is more subtle but equally real.
2. Denominator vs. Your Lease
Confirm the denominator the landlord used for your pro-rata share. Pull out your lease and find the definition of "rentable area" or "total floor area" in the CAM provisions. Does the denominator on the statement match that definition?
Common discrepancies: using current occupied area instead of total leasable area (artificially inflating your share), using building GLA instead of the defined CAM pool (which may exclude certain spaces), or failing to apply a carve-out for a large anchor tenant whose space your lease excludes from the denominator.
3. CapEx-Sounding Line Items
Scan every line item description for capital-improvement language: "replacement," "renovation," "new installation," "upgrade," "modernization." Cross-reference any match against your lease's exclusions list.
Large dollar amounts on ambiguous descriptions — "building improvements," "major repairs," "facility upgrades" — warrant a backup invoice request before you pay. These are the line items most likely to represent capital expenditures that your lease excludes from CAM. For more detail on this specific issue, see the guide on CapEx vs. OpEx in commercial leases.
4. Excluded Expense Categories in Your Lease
Your lease almost certainly has an exclusions list: categories of expense the landlord cannot pass through to tenants under any circumstances. Common exclusions include landlord's income taxes, depreciation, mortgage interest, leasing commissions, capital improvements, and costs arising from the landlord's negligence.
Read the exclusions list and compare it to every line item in section 2. It takes 20 minutes and it is worth it. Items that clearly match an exclusion should be challenged, in writing, before payment.
5. Year-Over-Year Increase vs. Your CAM Cap
If your lease contains a CAM cap — a provision limiting how much your CAM charges can increase year-over-year — locate the prior year's total and calculate the permitted increase. If the current year total exceeds the cap, the difference is an overcharge.
CAM cap calculations are often more complex than they appear because caps may be cumulative (unused cap room carries forward), may exclude certain categories like taxes and insurance, and may compound differently than a simple percentage suggests. But the starting point is simple arithmetic: does the current year total, adjusted for excluded categories, exceed the prior year total times the cap multiplier?
6. Administrative Fee Duplication
Some statements include both a "management fee" and a separate "administrative fee" or "accounting fee." In many leases, these are the same cost under different labels — the lease caps the management fee and prohibits layering additional administrative charges on top of it.
Check whether your lease addresses administrative fees explicitly. If it doesn't — or if it lumps them under the management fee cap — charging both is a billing error.
After the Checklist
If you find discrepancies, document them with specific line item references and dollar amounts before contacting your landlord. A vague "I think this looks off" conversation accomplishes less than a written request citing the specific lease clause, the billed amount, and the amount you calculate as correct.
Check your lease for the dispute deadline. The clock started when the reconciliation was delivered to you, not when you opened it. If you received it three months ago and you have a 90-day dispute window, you may have very little time.
CAMAudit automates the mechanical work in this checklist. Upload your lease and statement, and the detection engine verifies the pro-rata share calculation, management fee rate, expense exclusions, CAM cap compliance, and more — then generates a dispute letter draft you can send to your landlord directly.