How FASB ASC 842 Changed CAM Reconciliation for Landlords

The Standard That Changed the Conversation

When FASB issued ASC 842 (effective for public companies in 2019, private in 2022), the commercial real estate industry focused on the tenant side: operating leases moving onto balance sheets, right-of-use assets, lease liabilities.

Landlords mostly shrugged. The standard didn't change how they account for rental income or operating expenses.

But here's what landlords missed: ASC 842 made every tenant's CFO and external auditor care about CAM charges in a way they never did before. And that shift in attention has real consequences for how you run your reconciliation process.

What Changed for Tenants

Before ASC 842, a tenant's operating lease was a footnote. Literally — it appeared in the notes to the financial statements. The rent expense hit the income statement, and nobody on the audit team spent much time verifying the components.

After ASC 842:

Variable CAM charges — the true-up amounts from your annual reconciliation — must now be disclosed in the tenant's financial statements. The tenant's external auditors need to understand the methodology, validate the estimates, and confirm the actual amounts.

Your reconciliation statement is no longer an accounts payable document. It's an audit workpaper.

Three Ways This Affects Landlords

1. Audit Request Volume Is Up

The Big Four and regional CPA firms now routinely request CAM reconciliation backup as part of their lease audit procedures. If your tenant is a public company or a PE-backed company with audited financials, expect their auditors to ask for:

• Detailed reconciliation workbooks (not just the summary statement)
• GL detail supporting the total expense pool
• Occupancy data used in gross-up calculations
• Lease abstract showing the tenant's specific CAM provisions
• Year-over-year variance explanations for any category exceeding 10%

This is different from a tenant audit under the lease's audit rights clause. These requests come from the tenant's external auditors as part of their ASC 842 compliance procedures. They're typically less adversarial — but they require the same level of documentation.

2. Estimate Accuracy Matters More

Under ASC 842, tenants must estimate their total lease payments at inception and update those estimates annually. Variable CAM charges are part of that estimate.

If your monthly CAM estimates are consistently 20% off from actuals, the tenant's auditors will flag it. They'll want to know why the estimates are unreliable, and they may adjust the tenant's lease liability based on historical variance patterns.

This creates pressure to improve estimate accuracy. A landlord who sends an $8/SF estimate and then bills a $12/SF true-up creates an ASC 842 problem for the tenant — and that tenant's CFO will remember it at lease renewal.

3. Documentation Standards Are Higher

Before ASC 842, many landlords could send a one-page reconciliation statement with category totals and a bottom-line true-up. Tenants paid it or disputed it based on the total amount.

Now, tenants need enough detail to satisfy their auditors. That means:

• Category-level detail (not just a lump sum)
• Per-SF calculations showing the methodology
• Clear identification of fixed vs. variable components
• Gross-up calculations with occupancy assumptions
• Cap calculations with carry-forward amounts (if applicable)

If you're still sending summary-only statements, expect more information requests. Each request costs you 2-4 hours of controller time.

The Practical Response

None of this requires changing how you calculate CAM. The math stays the same. What changes is your documentation and communication process.

Improve your reconciliation package. Every statement should include enough backup that a CPA reviewing it can trace from the GL to the final per-tenant charge. Include occupancy data, pro-rata share calculations, and gross-up methodology. Once — this saves you from responding to individual requests.

Tighten your estimates. Review monthly estimate accuracy quarterly. If any property is tracking more than 10% above or below estimate, adjust mid-year. Your tenants' auditors are comparing your estimates to actuals, and persistent inaccuracy creates audit findings on their end that bounce back to you as questions.

Standardize your response to auditor requests. Create a template response package for ASC 842 documentation requests. Include a cover letter explaining your methodology, a reconciliation workbook, supporting GL detail, and occupancy data. Having this ready saves 6-8 hours per request.

Send statements earlier. Late statements create ASC 842 problems for tenants with December fiscal year-ends. Their auditors need CAM actuals before the audit report date (typically March for public companies). A statement arriving in May forces the tenant to use estimates in their filed financials and true-up later — which their auditors dislike.

The Silver Lining

ASC 842's heightened scrutiny has an upside for diligent landlords: it rewards accuracy and punishes sloppiness. If your reconciliation is clean, well-documented, and delivered on time, your tenants' auditors sign off quickly and move on. Your tenants trust the process. Disputes drop.

If your competitor's reconciliation is late, poorly documented, and riddled with errors, their tenants' auditors flag it. Disputes increase. Tenant satisfaction drops. And at lease renewal, the tenant remembers which landlord created accounting headaches and which one didn't.

Clean CAM reconciliation is now a competitive advantage in tenant retention. ASC 842 made that true in a way it wasn't before.

Related Resources

• Defensible Reconciliation Package — Build audit-ready documentation
• CAM Reconciliation Timeline — Hit statement deadlines
• CAM Billing KPIs — Track estimate accuracy
• What Tenant Auditors Look For — The 7 highest-frequency findings