The NOI That Doesn't Service the Debt: How Lenders Treat CAM Recoveries, Gross-Up Assumptions, and Expense Stops When Underwriting Multi-Tenant Cash Flow

The sponsor's operating pro forma shows NOI of $2.8 million. The lender's underwriting memo shows NOI of $2.1 million. Same property. Same rent roll. Different definitions of what cash flow actually exists.

This gap is not a negotiation. It is a structural consequence of how lenders treat CAM recoveries, gross-up assumptions, and expense stops. These three mechanics have constrained multi-tenant cash flow underwriting for decades because they sit at the intersection of sponsor optimism and lender conservatism, and because the underlying constraints that create them, remain constant: tenant credit quality is variable, expense inflation is real, and landlord recovery mechanisms are imperfect.

Understanding how lenders recast these items is the only way to build a model that survives the underwriting process.

CAM Recoveries: The Gap Between Billed and Collected

Most sponsors underwrite CAM recovery at or near 100 percent of base year expenses. Lenders do not.

The structural problem is simple: CAM is a pass-through, but the pass-through is imperfect. Tenants dispute charges, some tenants are in default or near default and withhold CAM rather than pay it, and some tenants have CAM caps or exclusions embedded in their leases. The sponsor's rent roll may show $180,000 in annual CAM per tenant, but the tenant's lease may say CAM is capped at $170,000 or excluded above a certain threshold. The sponsor's model assumes recovery. The lender's model assumes recovery net of disputes, net of bad debt, and net of lease provisions.

Lenders typically apply a 5 to 15 percent haircut to CAM recoveries depending on tenant credit quality and lease language. Weaker tenants, higher haircuts. Tenants with CAM caps or exclusions, haircuts. This is not negotiable because it reflects a structural reality: the landlord's recovery mechanism is only as good as the tenant's credit and the lease document's precision. Over cycles, that recovery rate has been consistent. The lender is not being punitive. The lender is modeling the cycle.

Gross-Up Assumptions: The Underoccupancy That Never Goes Away

Gross-up clauses allow landlords to recover the full amount of operating expenses as if the building were fully occupied, even if it is not. If the building is 90 percent occupied but expenses are $5 million, the landlord can pass to tenants the pro-rata share of expenses as if the building were 100 percent occupied. The sponsor's model assumes gross-up recovery at 95 or 98 percent occupancy. The lender's model assumes gross-up recovery at a lower occupancy threshold, or applies a haircut to the gross-up amount itself.

The constraint is structural and demographic: multi-tenant properties experience persistent vacancy. Turnover, market softness, tenant bankruptcy, and lease expirations create structural underoccupancy that is not temporary. A lender underwriting a multi-tenant property assumes occupancy in the 85 to 92 percent range, depending on asset class and location. At that occupancy, gross-up recovery is partial, not full. The sponsor's pro forma assumes the gross-up works. The lender's underwriting assumes the gross-up is constrained by the occupancy level that actually persists.

This is why many sponsors underwrite 95 percent occupancy but lenders underwrite 88 percent. It is not a difference of opinion. It is a difference in how each party models the structural underoccupancy that multi-tenant properties experience over a full cycle.

Expense Stops: The Inflation That Eats Into Net Income

An expense stop is a lease provision that caps the landlord's recovery of operating expense increases above a base year. If base year expenses are $10 per square foot and expenses rise to $12 per square foot, the tenant pays only the increase above the stop. If the stop is at $10, the tenant pays $2. If the stop is at $9, the tenant pays $3. If there is no stop, the tenant pays the full $2.

Sponsors often underwrite expense stops at the lease renewal rate or assume expense growth within the stop. Lenders underwrite expense stops by modeling the cost inflation that actually occurs and recognizing that tenant recovery is capped. Over a 10-year hold, expenses rise. Real estate taxes rise, insurance rises, utilities rise, wage costs rise. The landlord bears the cost of inflation above the stop. The sponsor's model may assume 2 percent annual expense growth within the stop. The lender's model assumes 3 to 4 percent growth and recognizes that above the stop, the landlord absorbs the increase.

This is a structural constraint because inflation is real and persistent. The expense stop was created precisely to protect tenants from inflation. Over a decade, that protection becomes a drag on landlord cash flow. Lenders model this drag. Sponsors often do not, or assume it away in the terminal value.

The Recast Waterfall: Where Sponsor NOI Becomes Lender NOI

A lender's recast of NOI follows a consistent logic across deals because the constraints are constant.

Start with sponsor NOI. Apply a 10 percent haircut to CAM recoveries for dispute and bad debt. Apply a 5 to 8 percent haircut to gross-up recovery for below-100-percent occupancy. Model expense growth above stops as unrecovered landlord cost. Exclude one-time or non-recurring items. Add back non-cash charges or tenant allowances that inflated the P&L. The result is lender NOI, which is typically 10 to 25 percent below sponsor NOI on the same property.

This is not negotiation. This is underwriting discipline applied consistently because the underlying constraints, tenant credit quality, inflation, and occupancy volatility, are structural and recurring.

Why This Matters for Deal Execution

A sponsor who does not anticipate the lender's recast of CAM, gross-up, and expense-stop cash flow will face a shortfall in DSCR or a requirement for additional equity. The lender will not move the needle on these items because they reflect years of observed loss experience and structural constraints that do not change across cycles.

The sponsor's path forward is not to argue the assumptions. It is to either accept the lender's recast and size debt accordingly, or to invest in lease structure and tenant quality that reduces the lender's need for haircuts. Better lease language, stronger tenants, shorter stops, lower CAM pass-throughs, all reduce the gap between sponsor and lender NOI. But the gap itself is structural. It reflects the real cost of running a multi-tenant property and recovering expenses from tenants whose credit quality and lease terms are imperfect.

What I'm watching next:

• How lenders adjust CAM haircuts as inflation persists and tenant credit stress rises; higher inflation and weaker tenants mean larger haircuts and lower cash flow recovery.
• Whether sponsors begin to bid expense stops into initial lease pricing, recognizing that the cost of inflation above the stop is a real economic drag that must be reflected in initial rent.
• How transitional and value-add lenders model NOI recast when expense stops roll off and new leases are signed; the refinance exit may depend on the ability to re-let at higher rents and lower stops.