The occupancy expense handoff is one of the more friction-prone moments in the year-end close cycle. The tax preparer needs clean, complete numbers. The bookkeeper or CAS firm has been coding charges throughout the year. The landlord has just sent a reconciliation statement that may or may not match what was accrued. And somewhere in that stack of paper is a disputed $7,800 tax pass-through that nobody has resolved yet. For more context, see the year-end occupancy expense support packet.
Getting this handoff right requires more than exporting the GL detail and attaching a folder of invoices. It requires a structured review that surfaces open issues before the return is filed, not after.
CAM True-Up: The annual reconciliation between estimated CAM payments made throughout the year and actual expenses incurred by the landlord. Results in either an additional charge (underpayment) or a credit (overpayment) to the tenant.
What the Tax Preparer Actually Needs
Start by understanding the problem from the tax preparer's side. They need to know: what was paid, when it was paid, what it was for, and whether any amounts are still open or contested.
For cash-basis taxpayers, the deduction follows the payment. For accrual-basis taxpayers, the deduction follows when the liability becomes fixed and determinable. That distinction matters a lot for CAM true-ups, which often arrive in December or January for the prior year.
A dentist on the second floor of a medical office building might receive a CAM reconciliation in mid-January showing she owes an additional $7,800 for the prior calendar year. If she is on accrual basis and the statement arrived in December, she should accrue it in December. If the statement arrived in January, the question of which year the liability attached is worth a five-minute conversation with the tax preparer before the return is filed.
The bookkeeper's job is not to make that call. The bookkeeper's job is to make sure the tax preparer has enough information to make it.
The Reconciliation Step Before the Handoff
Before assembling anything, reconcile each occupancy-related account against the source documents for the year.
Base rent should tie to a schedule of monthly payments. If the lease has rent escalation clauses, confirm the correct rate was applied each month. A dental practice on a 5-year lease with 3% annual increases should not be paying the year-one rate in year three.
CAM charges should be compared against the landlord's billing statements. Monthly CAM estimates are billed in advance and adjusted annually. The year-end balance in the CAM account should reflect twelve months of monthly estimates plus or minus any true-up amounts received during the year.
Real estate taxes are often passed through separately. If the landlord invoiced $12,400 in tax pass-throughs during the year and the GL shows $12,400 coded to the tax account, good. If the GL shows $14,200, find the $1,800 difference before the handoff. It may be a coding error, or it may be a legitimate escalation, but the tax preparer should not have to figure that out.
Insurance pass-throughs follow the same logic. Confirm what was invoiced and what was coded.
True-up payments or credits. If the client received a credit or paid an additional true-up charge during the year, make sure it landed in the right account and that the backup is attached.
Building the Handoff Package
The package should be organized so the tax preparer can find anything without having to ask. Here is the structure that works:
Account detail by code. Export GL detail for each occupancy account. Label each line item with enough context that someone who was not there can follow it: "Monthly CAM estimate per lease," "Annual true-up: 2025 reconciliation statement," "Real estate tax pass-through per landlord invoice 11-14."
Source documents. Attach landlord invoices and billing statements for each payment. If the landlord issues a single annual reconciliation statement covering base rent, CAM, taxes, and insurance together, attach that statement and cross-reference it to the GL.
Lease abstract excerpt. Include the relevant sections: the CAM definition, the management fee cap, the gross-up provision if applicable, and any expense exclusions. This gives the tax preparer context for what is contractually recoverable versus what might be a landlord error.
Open issues log. This is the most important piece. Any disputed amount, any unresolved question, any invoice that has not been matched to a GL entry should appear here with a brief description and status.
How to Flag Open Disputes Before Filing
An open CAM dispute is a contingent liability. The client has received a demand for payment. They have not paid it. They may contest it. The tax preparer needs to know this.
For the year-end handoff, document each open dispute on a single page: the nature of the charge, the amount, when it was received, and what action has been taken. If our tool flagged it as a potential overcharge (for example, a management fee calculated at 5% of gross revenues when the lease caps it at 3%), say so. Include any written correspondence with the landlord.
The tax preparer cannot properly assess a contingent liability without knowing it exists. If the client later pays a disputed amount that the tax preparer did not know about, it may require an amended return. If the client successfully disputes the charge, a deduction that was already taken may need to be reversed.
Neither outcome is a good surprise. The open issues log prevents both.
Accrual vs. Cash Basis: The True-Up Timing Question
This distinction comes up every January. A 3-location retailer on accrual basis receives three CAM reconciliation statements in early January. The statements cover the prior calendar year. The total additional charges across all three locations is $18,000.
If each statement was issued in December, the $18,000 is a prior-year liability that should have been accrued in December. If the statements arrived in January, the accrual question is when the liability became fixed, which is often the date of the statement.
The bookkeeper should document the date each statement was received and the date each invoice was paid. That is the factual record. The tax preparer makes the accrual judgment.
For cash-basis clients, this is simpler. The $18,000 deducts in the year paid, regardless of when the reconciliation period ended. But it still needs to be in the handoff package with clear documentation showing it is a CAM true-up for a specific period, not a routine monthly payment.
What Constitutes a Complete Handoff
A complete handoff has: reconciled GL by account, source documents for every line, a lease abstract excerpt for context, and an open issues log that is honest about what is unresolved.
An incomplete handoff has any of the following: accounts that do not reconcile to source documents, invoices that were coded but not attached, a true-up payment buried in the wrong account with no description, or a $7,800 disputed tax pass-through that nobody mentioned because the bookkeeper figured the tax preparer would sort it out.
The tax preparer will sort it out, but it will take longer and cost more. Surfacing issues before the handoff is always faster than discovering them during return preparation.
Building This Into Your Workflow
CAS firms that do this well do not scramble at year-end. They maintain a running occupancy document throughout the year: a tab for each location, columns for invoices received, amounts coded, discrepancies noted. By December, the reconciliation step takes an hour instead of a day.
The open issues log is also a year-round document. When a suspicious landlord invoice arrives in March, it goes on the log. When our tool flags a management fee overcharge in July, it goes on the log. By the time the tax handoff happens, the log already exists.
That is the difference between a reactive year-end scramble and a systematic handoff that the tax preparer can work from without a follow-up call.