Project the lease-up timeline for a new or renovated rental property. Estimate months to stabilized occupancy and cumulative vacancy loss.
When a new building delivers, or a renovated property re-enters the market, it doesn't fill overnight. Lease-up is the period from first unit availability to stabilized occupancy (typically 90–95%). During this period, the property generates below-normal income while carrying full debt service and operating expenses.
Lease-up pace depends on market conditions, pricing, marketing effort, and property quality. A 100-unit building absorbing 8–12 units per month reaches stabilization in 9–13 months. During that time, cumulative vacancy loss can be hundreds of thousands of dollars.
This calculator projects the month-by-month lease-up, showing cumulative units leased, occupancy percentage, rental income, and the total vacancy loss during the lease-up period. Use it for new development underwriting, value-add renovation planning, or lender presentations.
Homebuyers, investors, and real-estate professionals all benefit from precise lease-up schedule figures when evaluating properties, negotiating deals, or planning long-term investment strategies. Save this calculator and revisit it whenever market conditions or your financial situation changes.
Lease-up is the riskiest phase of any development or renovation project. This calculator quantifies the cost and timeline so you can budget reserves, negotiate construction loan terms, and set realistic investor expectations. Instant recalculation lets you compare scenarios side by side, so every buying, selling, or investment decision is grounded in solid financial analysis.
Units Leased in Month n = min(Absorption Rate, Target Units − Cumulative Units) Target Units = Total Units × Stabilized Occupancy Rate Monthly Income(n) = Units Occupied(n) × Rent Vacancy Loss(n) = (Total Units − Units Occupied(n)) × Rent Months to Stabilization = ceil(Target Units / Absorption Rate)
Result: 8 months to stabilization, $294,000 cumulative vacancy loss
Target: 47 units (94% of 50). At 6 units/month, it takes 8 months to reach 47 occupied units. During lease-up, cumulative vacancy loss is the sum of vacant unit-months × $1,500. Monthly expenses of $45,000 must be covered throughout, creating a significant cash need during the ramp.
Every additional month of lease-up costs potential income plus fixed expenses. On a 50-unit property at $1,500/month rent with $45,000 monthly expenses, each month below stabilization costs roughly $15,000–$30,000 in lost income plus accumulated expenses. This compounds quickly.
Start marketing 3–6 months before delivery. Offer early-bird concessions. Create a model unit 2–3 months before completion. Build a waiting list. Properties that pre-lease 20–30% of units before opening reach stabilization 2–4 months faster.
Lease-up properties follow a J-curve: negative cash flow during early months, then breakeven, then profitability. The bottom of the J (maximum cumulative loss) typically occurs 3–6 months into lease-up. Knowing where the bottom is helps you budget appropriately.
For conventional apartments: 100-unit building typically stabilizes in 8–14 months. Larger properties (200+ units) may take 12–24 months. Luxury product leases up more slowly. Affordable housing often leases up in 3–6 months due to high demand.
Absorption rate is the number of units leased per month during lease-up. It depends on market demand, pricing, marketing quality, and property amenities. Typical absorption: 6–15 units/month for conventional apartments, 2–6 for luxury, 10–20+ for affordable.
Stabilized occupancy is the long-run expected occupancy once the property is fully operational and marketed. Typically 92–96% for apartments. It accounts for normal turnover but not lease-up vacancy. Reaching stabilization marks the transition from development to operations.
A conservative rule: hold 12–18 months of debt service + operating expenses in reserve. So if monthly debt + opex = $60,000, budget $720,000–$1,080,000 in lease-up reserves. Under-reserved projects run into trouble fast.
Often yes. One month free on a 12-month lease (8.3% concession) can significantly accelerate absorption. The cost of the concession is usually less than the vacancy loss from slower leasing. But be strategic — large concessions can set expectations and reduce renewal rents.
During lease-up, the property is valued "as-is" (current income) and "as-stabilized" (projected stabilized income). Lenders use as-is value for current LTV and as-stabilized for future refinancing. The gap between the two is your development profit (or risk).