Commercial Property Accounting: A Practical Guide for Small Firms

Commercial property accounting is ordinary double-entry bookkeeping plus one thing residential books never carry: recoveries. Tenants reimburse taxes, insurance, and operating costs on rules set lease by lease, so the ledger has to track what was estimated, what was spent, and what each tenant will owe at reconciliation.

This guide covers the parts that are specific to commercial property, for the small firm whose books currently live in a general-purpose package and a stack of spreadsheets.

The chart of accounts

A commercial chart of accounts needs to separate income by type, because owners, lenders, and tenant auditors all ask about each one.

Income

• Base rent
• Percentage rent
• CAM recoveries
• Tax recoveries
• Insurance recoveries
• Other income (late fees, parking, signage)

Operating expenses, split along the same lines as the recovery pools: controllable CAM, utilities, taxes, insurance. If the expense accounts do not map cleanly to recovery pools, every reconciliation starts with a reclassification exercise.

Non-recoverable expenses: leasing commissions, legal, capital, and owner-level costs. Keeping them in their own accounts makes the exclusions in a reconciliation a report rather than a judgment call. See standard CAM exclusions.

Accrual timing matters more here

Three commercial items only make sense on an accrual basis:

1. Recoveries. Estimates billed through the year are income for that year. The reconciliation adjusts them after year end, but the adjustment belongs to the year the costs were incurred.
2. Reconciliation receivables and payables. When the year closes, the expected true-up is owed by or to tenants. Booking it at year end gives an accurate picture of income before the reconciliation statements go out.
3. Free rent and escalations. Under GAAP, rent with abatements and steps is recognized on a straight-line basis over the term, creating a deferred rent balance. Small owners on tax or cash basis may skip this, but lenders reviewing GAAP statements will not.

Tenant AR is per lease, per charge

Residential AR is usually one balance per resident. Commercial AR needs to show, for each tenant, which charges are open: base rent, each recovery line, percentage rent, and reconciliation balances. Tenants dispute specific charges, not balances, and a payment applied to the wrong charge can make a disputed CAM true-up look like unpaid base rent.

Credits should go out as credit memos, not negative invoices, and write-offs should be explicit entries. That keeps the AR aging honest.

Corrections without rewriting history

Commercial books get audited: by owners, lenders, and tenants exercising audit rights. Correct posted entries by reversing them and posting new ones, rather than editing them in place. A ledger where history can be overwritten cannot answer the question an auditor always asks: what did this look like when you sent the statement?

The monthly close

A monthly close for commercial property typically includes:

• Bill rent and estimates, apply receipts, and review AR aging
• Post and accrue operating expenses into the right recoverable accounts
• Compare actual expenses to the budget behind the estimates
• Review lease events: escalations, expirations, options exercised
• Lock the period so later entries land in the open month

The recovery comparison is the step most firms skip, and it is the one that prevents a surprise true-up. If actual CAM is running 12% over budget in June, revising estimates then is far easier than billing the gap in March. CAM estimates and true-ups covers how to set and revise them.

Reports that matter

Report	Who reads it	What it answers
Income statement by property	Owners, lenders	How is the property performing?
Tenant AR aging	Property managers	Who owes what, and for how long?
Rent roll	Owners, lenders, buyers	What is leased, at what rent, until when?
Recovery summary	Accountants	Are estimates tracking actual costs?
General ledger detail	Auditors	Where did this number come from?

Where the general ledger meets the lease

The common setup at small firms is a general ledger in one system and the lease terms that drive billing in another, usually a spreadsheet. Every month someone re-keys charges between them. The reconciliation at year end then depends on both sides having stayed in sync, which they rarely have.

Commercial property accounting software closes that gap by keeping the ledger, tenant AR, and the CAM reconciliation on the same lease records.