Lease-Up & Stabilization Risk

When a construction lender's draws are exhausted and the building department signs off, the property receives its certificate of occupancy (CO) — the legal green light for tenants to move in. A CO is not the same as a finished, income-producing asset. The period that follows, called lease-up, is when the sponsor markets the space, signs new leases, and moves tenants in until the property reaches stabilization: a sustained occupancy level (commonly discussed in the 90-95% range for many property types, though the right benchmark varies by market and asset class) at market rents with normal, ongoing concession levels.

Between CO and stabilization, the property behaves nothing like the stabilized asset the original pro forma described. Rents may be discounted to attract early tenants, marketing and tenant-improvement costs are still being spent, and cash flow is typically insufficient to cover full operating expenses and debt service. This gap is precisely why lease-up and stabilization risk deserves its own line of underwriting scrutiny, separate from construction risk itself.

A development pro forma's construction budget and hard/soft costs can be estimated with reasonable precision because contractors provide bids and schedules. The lease-up absorption curve — how many units or square feet lease each month, and at what rent and concession level — is inherently a forecast of future market behavior, made a year or more before the space is ready to lease. Sponsors, understandably motivated to show a strong return, often model an absorption pace on the optimistic end of what comparable properties have achieved.

Actual conditions can diverge sharply from that forecast. A construction timeline that slips by even a few months can push delivery into a weaker leasing season. Competing projects that broke ground around the same time may deliver into the same submarket simultaneously, forcing every landlord to compete on concessions. And broader shifts in demand, employment, or interest rates between underwriting and delivery can change what rent the market will actually bear. Because so much of a development's projected value depends on reaching stabilized NOI on schedule, a slower-than-planned lease-up is one of the most common ways a development deal underperforms its underwriting.

Lenders cannot eliminate lease-up risk, but they structure loans to absorb it rather than be surprised by it. The most direct tool is the interest reserve — a fund, typically drawn from the loan itself, that covers interest payments during construction and lease-up so the sponsor is not required to pay debt service out of pocket before the property produces income. Prudent underwriting sizes this reserve against a lease-up period somewhat longer than the sponsor's base-case projection, so that a modest delay does not immediately force a capital call or default.

The second major tool operates on the permanent side of the transaction: earnout (or holdback) provisions. Rather than committing to fund the full anticipated permanent loan amount unconditionally, the permanent lender (whether the construction lender rolling into a mini-perm, or a separate takeout lender under a forward commitment) agrees to fund an initial, lower amount at conversion and release additional proceeds — the earnout — only after the property demonstrates a specified debt yield or DSCR for a defined period, such as three to six consecutive months. This ties the lender's ultimate funding to actual, proven performance rather than to the sponsor's projection.

Two related metrics help both sponsors and lenders monitor lease-up progress. Breakeven occupancy is the occupancy level at which rental income just covers operating expenses and debt service, with nothing left over; below it, the property runs an operating deficit that must be funded from the interest reserve, additional equity, or reserves. Leasing velocity — the pace of new leases signed per month compared to the pro forma's absorption schedule — is the earliest warning sign lenders and asset managers watch, because it reveals a lagging lease-up long before it shows up in trailing financial statements.

Comparing actual leasing velocity against the underwritten schedule each month lets a lender see, well before the interest reserve is exhausted, whether the deal is tracking to plan, running ahead, or falling behind — and whether a covenant conversation, an extension, or additional sponsor support may be needed.